Put FXCMAP code in namespace fxcmap

Use a C++ namespace instead of a prefix. Also do some IWYU in some
modified headers.

Change-Id: I5ee89f07841b3b599afbb4744b598424da4ba04c
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/106231
Reviewed-by: Nigi <nigi@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/core/fpdfapi/cmaps/CNS1/Adobe-CNS1-UCS2_5.cpp b/core/fpdfapi/cmaps/CNS1/Adobe-CNS1-UCS2_5.cpp
index 68d9ab3..154233b 100644
--- a/core/fpdfapi/cmaps/CNS1/Adobe-CNS1-UCS2_5.cpp
+++ b/core/fpdfapi/cmaps/CNS1/Adobe-CNS1-UCS2_5.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/CNS1/cmaps_cns1.h"
 
-const uint16_t kFXCMAP_CNS1CID2Unicode_5[19088] = {
+namespace fxcmap {
+
+const uint16_t kCNS1CID2Unicode_5[19088] = {
     0xFFFD, 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
     0x0028, 0x0029, 0x002A, 0x002B, 0x002C, 0x002D, 0x002E, 0x002F, 0x0030,
     0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, 0x0038, 0x0039,
@@ -2129,3 +2131,5 @@
     0x0000, 0x0000, 0x456D, 0x38D4, 0x0000, 0x4561, 0x451B, 0x4D89, 0x4C7B,
     0x4D76, 0x45EA, 0x3FC8, 0x0000, 0x3661, 0x44DE, 0x44BD, 0x41ED,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/CNS1/B5pc-H_0.cpp b/core/fpdfapi/cmaps/CNS1/B5pc-H_0.cpp
index acdf90d..d24620c 100644
--- a/core/fpdfapi/cmaps/CNS1/B5pc-H_0.cpp
+++ b/core/fpdfapi/cmaps/CNS1/B5pc-H_0.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/CNS1/cmaps_cns1.h"
 
-const uint16_t kFXCMAP_B5pc_H_0[247 * 3] = {
+namespace fxcmap {
+
+const uint16_t kB5pc_H_0[247 * 3] = {
     0x0020, 0x007E, 0x0001, 0x0080, 0x0080, 0x003D, 0x00FD, 0x00FF, 0x0060,
     0xA140, 0xA158, 0x0063, 0xA159, 0xA15C, 0x35AF, 0xA15D, 0xA17E, 0x0080,
     0xA1A1, 0xA1F5, 0x00A2, 0xA1F6, 0xA1F6, 0x00F8, 0xA1F7, 0xA1F7, 0x00F7,
@@ -91,3 +93,5 @@
     0xF9C5, 0xF9C5, 0x353D, 0xF9C6, 0xF9C6, 0x3549, 0xF9C7, 0xF9D1, 0x353E,
     0xF9D2, 0xF9D5, 0x354A,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/CNS1/B5pc-V_0.cpp b/core/fpdfapi/cmaps/CNS1/B5pc-V_0.cpp
index 690f1ed..b7a17a5 100644
--- a/core/fpdfapi/cmaps/CNS1/B5pc-V_0.cpp
+++ b/core/fpdfapi/cmaps/CNS1/B5pc-V_0.cpp
@@ -6,9 +6,13 @@
 
 #include "core/fpdfapi/cmaps/CNS1/cmaps_cns1.h"
 
-const uint16_t kFXCMAP_B5pc_V_0[12 * 3] = {
+namespace fxcmap {
+
+const uint16_t kB5pc_V_0[12 * 3] = {
     0xA14B, 0xA14B, 0x354E, 0xA15A, 0xA15A, 0x35AF, 0xA15C, 0xA15C, 0x35B1,
     0xA15D, 0xA15E, 0x0082, 0xA161, 0xA162, 0x0086, 0xA165, 0xA166, 0x008A,
     0xA169, 0xA16A, 0x008E, 0xA16D, 0xA16E, 0x0092, 0xA171, 0xA172, 0x0096,
     0xA175, 0xA176, 0x009A, 0xA179, 0xA17A, 0x009E, 0xA1E3, 0xA1E3, 0x354F,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/CNS1/CNS-EUC-H_0.cpp b/core/fpdfapi/cmaps/CNS1/CNS-EUC-H_0.cpp
index 545623a..cfa4eac 100644
--- a/core/fpdfapi/cmaps/CNS1/CNS-EUC-H_0.cpp
+++ b/core/fpdfapi/cmaps/CNS1/CNS-EUC-H_0.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/CNS1/cmaps_cns1.h"
 
-const uint16_t kFXCMAP_CNS_EUC_H_0[157 * 3] = {
+namespace fxcmap {
+
+const uint16_t kCNS_EUC_H_0[157 * 3] = {
     0x0020, 0x007E, 0x3550, 0xA1A1, 0xA1FE, 0x0063, 0xA2A1, 0xA2FE, 0x00C1,
     0xA3A1, 0xA3CE, 0x011F, 0xA4A1, 0xA4FE, 0x014D, 0xA5A1, 0xA5EC, 0x01AB,
     0xA5EE, 0xA5F0, 0x01F7, 0xA6A1, 0xA6BE, 0x01FA, 0xA7A1, 0xA7A1, 0x0253,
@@ -62,7 +64,7 @@
     0xFDA1, 0xFDCB, 0x1741,
 };
 
-const FXCMAP_DWordCIDMap kFXCMAP_CNS_EUC_H_0_DWord[238] = {
+const DWordCIDMap kCNS_EUC_H_0_DWord[238] = {
     {0x8EA1, 0xA1A1, 0xA1FE, 0x0063}, {0x8EA1, 0xA2A1, 0xA2FE, 0x00C1},
     {0x8EA1, 0xA3A1, 0xA3CE, 0x011F}, {0x8EA1, 0xA4A1, 0xA4FE, 0x014D},
     {0x8EA1, 0xA5A1, 0xA5EC, 0x01AB}, {0x8EA1, 0xA5EE, 0xA5F0, 0x01F7},
@@ -183,3 +185,5 @@
     {0x8EA2, 0xEFA1, 0xEFFE, 0x3410}, {0x8EA2, 0xF0A1, 0xF0FE, 0x346E},
     {0x8EA2, 0xF1A1, 0xF1FE, 0x34CC}, {0x8EA2, 0xF2A1, 0xF2C4, 0x352A},
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/CNS1/CNS-EUC-V_0.cpp b/core/fpdfapi/cmaps/CNS1/CNS-EUC-V_0.cpp
index 0ce79e9..97834d9 100644
--- a/core/fpdfapi/cmaps/CNS1/CNS-EUC-V_0.cpp
+++ b/core/fpdfapi/cmaps/CNS1/CNS-EUC-V_0.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/CNS1/cmaps_cns1.h"
 
-const uint16_t kFXCMAP_CNS_EUC_V_0[180 * 3] = {
+namespace fxcmap {
+
+const uint16_t kCNS_EUC_V_0[180 * 3] = {
     0x0020, 0x007E, 0x3550, 0xA1A1, 0xA1AB, 0x0063, 0xA1AC, 0xA1AC, 0x354E,
     0xA1AD, 0xA1BA, 0x006F, 0xA1BB, 0xA1BB, 0x007C, 0xA1BC, 0xA1BC, 0x007E,
     0xA1BD, 0xA1BD, 0x007E, 0xA1BE, 0xA1BF, 0x0082, 0xA1C0, 0xA1C1, 0x0082,
@@ -69,7 +71,7 @@
     0xFBA1, 0xFBFE, 0x1685, 0xFCA1, 0xFCFE, 0x16E3, 0xFDA1, 0xFDCB, 0x1741,
 };
 
-const FXCMAP_DWordCIDMap kFXCMAP_CNS_EUC_V_0_DWord[261] = {
+const DWordCIDMap kCNS_EUC_V_0_DWord[261] = {
     {0x8EA1, 0xA1A1, 0xA1AB, 0x0063}, {0x8EA1, 0xA1AC, 0xA1AC, 0x354E},
     {0x8EA1, 0xA1AD, 0xA1BA, 0x006F}, {0x8EA1, 0xA1BB, 0xA1BB, 0x007C},
     {0x8EA1, 0xA1BC, 0xA1BC, 0x007E}, {0x8EA1, 0xA1BD, 0xA1BD, 0x007E},
@@ -202,3 +204,5 @@
     {0x8EA2, 0xF0A1, 0xF0FE, 0x346E}, {0x8EA2, 0xF1A1, 0xF1FE, 0x34CC},
     {0x8EA2, 0xF2A1, 0xF2C4, 0x352A},
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/CNS1/ETen-B5-H_0.cpp b/core/fpdfapi/cmaps/CNS1/ETen-B5-H_0.cpp
index 6be9a0a..44687c1 100644
--- a/core/fpdfapi/cmaps/CNS1/ETen-B5-H_0.cpp
+++ b/core/fpdfapi/cmaps/CNS1/ETen-B5-H_0.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/CNS1/cmaps_cns1.h"
 
-const uint16_t kFXCMAP_ETen_B5_H_0[254 * 3] = {
+namespace fxcmap {
+
+const uint16_t kETen_B5_H_0[254 * 3] = {
     0x0020, 0x007E, 0x3550, 0xA140, 0xA158, 0x0063, 0xA159, 0xA15C, 0x35AF,
     0xA15D, 0xA17E, 0x0080, 0xA1A1, 0xA1F5, 0x00A2, 0xA1F6, 0xA1F6, 0x00F8,
     0xA1F7, 0xA1F7, 0x00F7, 0xA1F8, 0xA1FE, 0x00F9, 0xA240, 0xA27E, 0x0100,
@@ -93,3 +95,5 @@
     0xF9C5, 0xF9C5, 0x353D, 0xF9C6, 0xF9C6, 0x3549, 0xF9C7, 0xF9D1, 0x353E,
     0xF9D2, 0xF9D5, 0x354A, 0xF9D6, 0xF9FE, 0x36E8,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/CNS1/ETen-B5-V_0.cpp b/core/fpdfapi/cmaps/CNS1/ETen-B5-V_0.cpp
index a522aa0..38359e8 100644
--- a/core/fpdfapi/cmaps/CNS1/ETen-B5-V_0.cpp
+++ b/core/fpdfapi/cmaps/CNS1/ETen-B5-V_0.cpp
@@ -6,10 +6,14 @@
 
 #include "core/fpdfapi/cmaps/CNS1/cmaps_cns1.h"
 
-const uint16_t kFXCMAP_ETen_B5_V_0[13 * 3] = {
+namespace fxcmap {
+
+const uint16_t kETen_B5_V_0[13 * 3] = {
     0xA14B, 0xA14B, 0x354E, 0xA15A, 0xA15A, 0x35AF, 0xA15C, 0xA15C,
     0x35B1, 0xA15D, 0xA15E, 0x0082, 0xA161, 0xA162, 0x0086, 0xA165,
     0xA166, 0x008A, 0xA169, 0xA16A, 0x008E, 0xA16D, 0xA16E, 0x0092,
     0xA171, 0xA172, 0x0096, 0xA175, 0xA176, 0x009A, 0xA179, 0xA17A,
     0x009E, 0xA1E3, 0xA1E3, 0x354F, 0xC6E4, 0xC6E5, 0x3711,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/CNS1/ETenms-B5-H_0.cpp b/core/fpdfapi/cmaps/CNS1/ETenms-B5-H_0.cpp
index fef10a3..0f44566 100644
--- a/core/fpdfapi/cmaps/CNS1/ETenms-B5-H_0.cpp
+++ b/core/fpdfapi/cmaps/CNS1/ETenms-B5-H_0.cpp
@@ -6,8 +6,12 @@
 
 #include "core/fpdfapi/cmaps/CNS1/cmaps_cns1.h"
 
-const uint16_t kFXCMAP_ETenms_B5_H_0[1 * 3] = {
+namespace fxcmap {
+
+const uint16_t kETenms_B5_H_0[1 * 3] = {
     0x0020,
     0x007E,
     0x0001,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/CNS1/ETenms-B5-V_0.cpp b/core/fpdfapi/cmaps/CNS1/ETenms-B5-V_0.cpp
index 98cab38..5aafd16 100644
--- a/core/fpdfapi/cmaps/CNS1/ETenms-B5-V_0.cpp
+++ b/core/fpdfapi/cmaps/CNS1/ETenms-B5-V_0.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/CNS1/cmaps_cns1.h"
 
-const uint16_t kFXCMAP_ETenms_B5_V_0[18 * 3] = {
+namespace fxcmap {
+
+const uint16_t kETenms_B5_V_0[18 * 3] = {
     0xA14B, 0xA14B, 0x354E, 0xA14C, 0xA14C, 0x006D, 0xA156, 0xA156, 0x0138,
     0xA158, 0xA158, 0x007A, 0xA15A, 0xA15A, 0x35AF, 0xA15C, 0xA15C, 0x35B1,
     0xA15D, 0xA15E, 0x0082, 0xA161, 0xA162, 0x0086, 0xA165, 0xA166, 0x008A,
@@ -14,3 +16,5 @@
     0xA175, 0xA176, 0x009A, 0xA179, 0xA17A, 0x009E, 0xA17D, 0xA17E, 0x0082,
     0xA1A1, 0xA1A2, 0x0086, 0xA1A3, 0xA1A4, 0x008A, 0xC6E4, 0xC6E5, 0x3711,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/CNS1/HKscs-B5-H_5.cpp b/core/fpdfapi/cmaps/CNS1/HKscs-B5-H_5.cpp
index 38ece6f..e073f3e 100644
--- a/core/fpdfapi/cmaps/CNS1/HKscs-B5-H_5.cpp
+++ b/core/fpdfapi/cmaps/CNS1/HKscs-B5-H_5.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/CNS1/cmaps_cns1.h"
 
-const uint16_t kFXCMAP_HKscs_B5_H_5[1210 * 3] = {
+namespace fxcmap {
+
+const uint16_t kHKscs_B5_H_5[1210 * 3] = {
     0x0020, 0x007E, 0x0001, 0x8740, 0x8765, 0x4A15, 0x8767, 0x8779, 0x4A3B,
     0x8840, 0x8855, 0x44C9, 0x8856, 0x887E, 0x4961, 0x88A1, 0x88A8, 0x498A,
     0x88A9, 0x88AA, 0x499C, 0x8940, 0x8941, 0x4534, 0x8943, 0x8943, 0x4536,
@@ -412,3 +414,5 @@
     0xFEDE, 0xFEDF, 0x495D, 0xFEE0, 0xFEEC, 0x42EB, 0xFEED, 0xFEEE, 0x495F,
     0xFEEF, 0xFEFE, 0x42F8,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/CNS1/HKscs-B5-V_5.cpp b/core/fpdfapi/cmaps/CNS1/HKscs-B5-V_5.cpp
index 722dd43..ab6418c 100644
--- a/core/fpdfapi/cmaps/CNS1/HKscs-B5-V_5.cpp
+++ b/core/fpdfapi/cmaps/CNS1/HKscs-B5-V_5.cpp
@@ -6,10 +6,14 @@
 
 #include "core/fpdfapi/cmaps/CNS1/cmaps_cns1.h"
 
-const uint16_t kFXCMAP_HKscs_B5_V_5[13 * 3] = {
+namespace fxcmap {
+
+const uint16_t kHKscs_B5_V_5[13 * 3] = {
     0xA14B, 0xA14B, 0x354E, 0xA15A, 0xA15A, 0x35AF, 0xA15C, 0xA15C,
     0x35B1, 0xA15D, 0xA15E, 0x0082, 0xA161, 0xA162, 0x0086, 0xA165,
     0xA166, 0x008A, 0xA169, 0xA16A, 0x008E, 0xA16D, 0xA16E, 0x0092,
     0xA171, 0xA172, 0x0096, 0xA175, 0xA176, 0x009A, 0xA179, 0xA17A,
     0x009E, 0xA1E3, 0xA1E3, 0x354F, 0xC6E4, 0xC6E5, 0x3711,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/CNS1/UniCNS-UCS2-H_3.cpp b/core/fpdfapi/cmaps/CNS1/UniCNS-UCS2-H_3.cpp
index 29380a1..fb13a37 100644
--- a/core/fpdfapi/cmaps/CNS1/UniCNS-UCS2-H_3.cpp
+++ b/core/fpdfapi/cmaps/CNS1/UniCNS-UCS2-H_3.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/CNS1/cmaps_cns1.h"
 
-const uint16_t kFXCMAP_UniCNS_UCS2_H_3[16418 * 3] = {
+namespace fxcmap {
+
+const uint16_t kUniCNS_UCS2_H_3[16418 * 3] = {
     0x0020, 0x007E, 0x0001, 0x00A2, 0x00A3, 0x0106, 0x00A5, 0x00A5, 0x0104,
     0x00A7, 0x00A7, 0x00B2, 0x00A8, 0x00A8, 0x35B3, 0x00AC, 0x00AC, 0x36E1,
     0x00B0, 0x00B0, 0x0118, 0x00B1, 0x00B1, 0x00D4, 0x00B7, 0x00B7, 0x0073,
@@ -5481,3 +5483,5 @@
     0xFF5C, 0xFF5C, 0x0078, 0xFF5D, 0xFF5D, 0x0085, 0xFF64, 0xFF64, 0x0071,
     0xFFE2, 0xFFE2, 0x36E1, 0xFFE4, 0xFFE4, 0x36E2,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/CNS1/UniCNS-UCS2-V_3.cpp b/core/fpdfapi/cmaps/CNS1/UniCNS-UCS2-V_3.cpp
index 82ef212..36cb2a6 100644
--- a/core/fpdfapi/cmaps/CNS1/UniCNS-UCS2-V_3.cpp
+++ b/core/fpdfapi/cmaps/CNS1/UniCNS-UCS2-V_3.cpp
@@ -6,10 +6,14 @@
 
 #include "core/fpdfapi/cmaps/CNS1/cmaps_cns1.h"
 
-const uint16_t kFXCMAP_UniCNS_UCS2_V_3[13 * 3] = {
+namespace fxcmap {
+
+const uint16_t kUniCNS_UCS2_V_3[13 * 3] = {
     0x2013, 0x2013, 0x0078, 0x2014, 0x2014, 0x007A, 0x2025, 0x2025,
     0x006D, 0x3008, 0x3009, 0x0096, 0x300A, 0x300B, 0x0092, 0x300C,
     0x300D, 0x009A, 0x300E, 0x300F, 0x009E, 0x3010, 0x3011, 0x008E,
     0x3014, 0x3015, 0x008A, 0xFE4F, 0xFE4F, 0x35B1, 0xFF08, 0xFF09,
     0x0082, 0xFF5B, 0xFF5B, 0x0086, 0xFF5D, 0xFF5D, 0x0087,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/CNS1/UniCNS-UTF16-H_0.cpp b/core/fpdfapi/cmaps/CNS1/UniCNS-UTF16-H_0.cpp
index 4d98cad..05fc715 100644
--- a/core/fpdfapi/cmaps/CNS1/UniCNS-UTF16-H_0.cpp
+++ b/core/fpdfapi/cmaps/CNS1/UniCNS-UTF16-H_0.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/CNS1/cmaps_cns1.h"
 
-const uint16_t kFXCMAP_UniCNS_UTF16_H_0[14557 * 2] = {
+namespace fxcmap {
+
+const uint16_t kUniCNS_UTF16_H_0[14557 * 2] = {
     0x0020, 0x0001, 0x0021, 0x0002, 0x0022, 0x0003, 0x0023, 0x0004, 0x0024,
     0x0005, 0x0025, 0x0006, 0x0026, 0x0007, 0x0027, 0x0008, 0x0028, 0x0009,
     0x0029, 0x000A, 0x002A, 0x000B, 0x002B, 0x000C, 0x002C, 0x000D, 0x002D,
@@ -3243,3 +3245,5 @@
     0x0085, 0xFF5E, 0x00E4, 0xFF64, 0x0071, 0xFFE0, 0x0106, 0xFFE1, 0x0107,
     0xFFE2, 0x36E1, 0xFFE3, 0x00C4, 0xFFE4, 0x36E2, 0xFFE5, 0x0104,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/CNS1/cmaps_cns1.cpp b/core/fpdfapi/cmaps/CNS1/cmaps_cns1.cpp
index ae180b0..53038f6 100644
--- a/core/fpdfapi/cmaps/CNS1/cmaps_cns1.cpp
+++ b/core/fpdfapi/cmaps/CNS1/cmaps_cns1.cpp
@@ -8,31 +8,25 @@
 
 #include <iterator>
 
-const FXCMAP_CMap kFXCMAP_CNS1_cmaps[] = {
-    {"B5pc-H", kFXCMAP_B5pc_H_0, nullptr, 247, 0, FXCMAP_CMap::Range, 0},
-    {"B5pc-V", kFXCMAP_B5pc_V_0, nullptr, 12, 0, FXCMAP_CMap::Range, -1},
-    {"HKscs-B5-H", kFXCMAP_HKscs_B5_H_5, nullptr, 1210, 0, FXCMAP_CMap::Range,
-     0},
-    {"HKscs-B5-V", kFXCMAP_HKscs_B5_V_5, nullptr, 13, 0, FXCMAP_CMap::Range,
-     -1},
-    {"ETen-B5-H", kFXCMAP_ETen_B5_H_0, nullptr, 254, 0, FXCMAP_CMap::Range, 0},
-    {"ETen-B5-V", kFXCMAP_ETen_B5_V_0, nullptr, 13, 0, FXCMAP_CMap::Range, -1},
-    {"ETenms-B5-H", kFXCMAP_ETenms_B5_H_0, nullptr, 1, 0, FXCMAP_CMap::Range,
-     -2},
-    {"ETenms-B5-V", kFXCMAP_ETenms_B5_V_0, nullptr, 18, 0, FXCMAP_CMap::Range,
-     -1},
-    {"CNS-EUC-H", kFXCMAP_CNS_EUC_H_0, kFXCMAP_CNS_EUC_H_0_DWord, 157, 238,
-     FXCMAP_CMap::Range, 0},
-    {"CNS-EUC-V", kFXCMAP_CNS_EUC_V_0, kFXCMAP_CNS_EUC_V_0_DWord, 180, 261,
-     FXCMAP_CMap::Range, 0},
-    {"UniCNS-UCS2-H", kFXCMAP_UniCNS_UCS2_H_3, nullptr, 16418, 0,
-     FXCMAP_CMap::Range, 0},
-    {"UniCNS-UCS2-V", kFXCMAP_UniCNS_UCS2_V_3, nullptr, 13, 0,
-     FXCMAP_CMap::Range, -1},
-    {"UniCNS-UTF16-H", kFXCMAP_UniCNS_UTF16_H_0, nullptr, 14557, 0,
-     FXCMAP_CMap::Single, 0},
-    {"UniCNS-UTF16-V", kFXCMAP_UniCNS_UCS2_V_3, nullptr, 13, 0,
-     FXCMAP_CMap::Range, -1},
+namespace fxcmap {
+
+const CMap kCNS1_cmaps[] = {
+    {"B5pc-H", kB5pc_H_0, nullptr, 247, 0, CMap::Range, 0},
+    {"B5pc-V", kB5pc_V_0, nullptr, 12, 0, CMap::Range, -1},
+    {"HKscs-B5-H", kHKscs_B5_H_5, nullptr, 1210, 0, CMap::Range, 0},
+    {"HKscs-B5-V", kHKscs_B5_V_5, nullptr, 13, 0, CMap::Range, -1},
+    {"ETen-B5-H", kETen_B5_H_0, nullptr, 254, 0, CMap::Range, 0},
+    {"ETen-B5-V", kETen_B5_V_0, nullptr, 13, 0, CMap::Range, -1},
+    {"ETenms-B5-H", kETenms_B5_H_0, nullptr, 1, 0, CMap::Range, -2},
+    {"ETenms-B5-V", kETenms_B5_V_0, nullptr, 18, 0, CMap::Range, -1},
+    {"CNS-EUC-H", kCNS_EUC_H_0, kCNS_EUC_H_0_DWord, 157, 238, CMap::Range, 0},
+    {"CNS-EUC-V", kCNS_EUC_V_0, kCNS_EUC_V_0_DWord, 180, 261, CMap::Range, 0},
+    {"UniCNS-UCS2-H", kUniCNS_UCS2_H_3, nullptr, 16418, 0, CMap::Range, 0},
+    {"UniCNS-UCS2-V", kUniCNS_UCS2_V_3, nullptr, 13, 0, CMap::Range, -1},
+    {"UniCNS-UTF16-H", kUniCNS_UTF16_H_0, nullptr, 14557, 0, CMap::Single, 0},
+    {"UniCNS-UTF16-V", kUniCNS_UCS2_V_3, nullptr, 13, 0, CMap::Range, -1},
 };
 
-const size_t kFXCMAP_CNS1_cmaps_size = std::size(kFXCMAP_CNS1_cmaps);
+const size_t kCNS1_cmaps_size = std::size(kCNS1_cmaps);
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/CNS1/cmaps_cns1.h b/core/fpdfapi/cmaps/CNS1/cmaps_cns1.h
index 78ec0dd..75b31cb 100644
--- a/core/fpdfapi/cmaps/CNS1/cmaps_cns1.h
+++ b/core/fpdfapi/cmaps/CNS1/cmaps_cns1.h
@@ -8,26 +8,31 @@
 #define CORE_FPDFAPI_CMAPS_CNS1_CMAPS_CNS1_H_
 
 #include <stddef.h>
+#include <stdint.h>
 
 #include "core/fpdfapi/cmaps/fpdf_cmaps.h"
 
-extern const uint16_t kFXCMAP_B5pc_H_0[];
-extern const uint16_t kFXCMAP_B5pc_V_0[];
-extern const uint16_t kFXCMAP_HKscs_B5_H_5[];
-extern const uint16_t kFXCMAP_HKscs_B5_V_5[];
-extern const uint16_t kFXCMAP_ETen_B5_H_0[];
-extern const uint16_t kFXCMAP_ETen_B5_V_0[];
-extern const uint16_t kFXCMAP_ETenms_B5_H_0[];
-extern const uint16_t kFXCMAP_ETenms_B5_V_0[];
-extern const uint16_t kFXCMAP_CNS_EUC_H_0[];
-extern const FXCMAP_DWordCIDMap kFXCMAP_CNS_EUC_H_0_DWord[];
-extern const uint16_t kFXCMAP_CNS_EUC_V_0[];
-extern const FXCMAP_DWordCIDMap kFXCMAP_CNS_EUC_V_0_DWord[];
-extern const uint16_t kFXCMAP_UniCNS_UCS2_H_3[];
-extern const uint16_t kFXCMAP_UniCNS_UCS2_V_3[];
-extern const uint16_t kFXCMAP_UniCNS_UTF16_H_0[];
-extern const uint16_t kFXCMAP_CNS1CID2Unicode_5[19088];
-extern const FXCMAP_CMap kFXCMAP_CNS1_cmaps[];
-extern const size_t kFXCMAP_CNS1_cmaps_size;
+namespace fxcmap {
+
+extern const uint16_t kB5pc_H_0[];
+extern const uint16_t kB5pc_V_0[];
+extern const uint16_t kHKscs_B5_H_5[];
+extern const uint16_t kHKscs_B5_V_5[];
+extern const uint16_t kETen_B5_H_0[];
+extern const uint16_t kETen_B5_V_0[];
+extern const uint16_t kETenms_B5_H_0[];
+extern const uint16_t kETenms_B5_V_0[];
+extern const uint16_t kCNS_EUC_H_0[];
+extern const DWordCIDMap kCNS_EUC_H_0_DWord[];
+extern const uint16_t kCNS_EUC_V_0[];
+extern const DWordCIDMap kCNS_EUC_V_0_DWord[];
+extern const uint16_t kUniCNS_UCS2_H_3[];
+extern const uint16_t kUniCNS_UCS2_V_3[];
+extern const uint16_t kUniCNS_UTF16_H_0[];
+extern const uint16_t kCNS1CID2Unicode_5[19088];
+extern const CMap kCNS1_cmaps[];
+extern const size_t kCNS1_cmaps_size;
+
+}  // namespace fxcmap
 
 #endif  // CORE_FPDFAPI_CMAPS_CNS1_CMAPS_CNS1_H_
diff --git a/core/fpdfapi/cmaps/GB1/Adobe-GB1-UCS2_5.cpp b/core/fpdfapi/cmaps/GB1/Adobe-GB1-UCS2_5.cpp
index 294f2e4..b987a24 100644
--- a/core/fpdfapi/cmaps/GB1/Adobe-GB1-UCS2_5.cpp
+++ b/core/fpdfapi/cmaps/GB1/Adobe-GB1-UCS2_5.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/GB1/cmaps_gb1.h"
 
-const uint16_t kFXCMAP_GB1CID2Unicode_5[30284] = {
+namespace fxcmap {
+
+const uint16_t kGB1CID2Unicode_5[30284] = {
     0xFFFD, 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
     0x0028, 0x0029, 0x002A, 0x002B, 0x002C, 0x002D, 0x002E, 0x002F, 0x0030,
     0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, 0x0038, 0x0039,
@@ -3373,3 +3375,5 @@
     0xA4B6, 0xA4B7, 0xA4B8, 0xA4B9, 0xA4BA, 0xA4BB, 0xA4BC, 0xA4BD, 0xA4BE,
     0xA4BF, 0xA4C0, 0xA4C1, 0xA4C2, 0xA4C3, 0xA4C4, 0xA4C5, 0xA4C6,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/GB1/GB-EUC-H_0.cpp b/core/fpdfapi/cmaps/GB1/GB-EUC-H_0.cpp
index 5133eab..6abfa33 100644
--- a/core/fpdfapi/cmaps/GB1/GB-EUC-H_0.cpp
+++ b/core/fpdfapi/cmaps/GB1/GB-EUC-H_0.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/GB1/cmaps_gb1.h"
 
-const uint16_t kFXCMAP_GB_EUC_H_0[90 * 3] = {
+namespace fxcmap {
+
+const uint16_t kGB_EUC_H_0[90 * 3] = {
     0x0020, 0x0020, 0x1E24, 0x0021, 0x007E, 0x032E, 0xA1A1, 0xA1FE, 0x0060,
     0xA2B1, 0xA2E2, 0x00BE, 0xA2E5, 0xA2EE, 0x00F0, 0xA2F1, 0xA2FC, 0x00FA,
     0xA3A1, 0xA3FE, 0x0106, 0xA4A1, 0xA4F3, 0x0164, 0xA5A1, 0xA5F6, 0x01B7,
@@ -38,3 +40,5 @@
     0xF2A1, 0xF2FE, 0x1BE3, 0xF3A1, 0xF3FE, 0x1C41, 0xF4A1, 0xF4FE, 0x1C9F,
     0xF5A1, 0xF5FE, 0x1CFD, 0xF6A1, 0xF6FE, 0x1D5B, 0xF7A1, 0xF7FE, 0x1DB9,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/GB1/GB-EUC-V_0.cpp b/core/fpdfapi/cmaps/GB1/GB-EUC-V_0.cpp
index 1a33c85..0f3d136 100644
--- a/core/fpdfapi/cmaps/GB1/GB-EUC-V_0.cpp
+++ b/core/fpdfapi/cmaps/GB1/GB-EUC-V_0.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/GB1/cmaps_gb1.h"
 
-const uint16_t kFXCMAP_GB_EUC_V_0[20 * 3] = {
+namespace fxcmap {
+
+const uint16_t kGB_EUC_V_0[20 * 3] = {
     0xA1A2, 0xA1A2, 0x023F, 0xA1A3, 0xA1A3, 0x023E, 0xA1AA, 0xA1AA, 0x0256,
     0xA1AB, 0xA1AC, 0x1E18, 0xA1AD, 0xA1AD, 0x0257, 0xA1B2, 0xA1BF, 0x0246,
     0xA1FE, 0xA1FE, 0x1E1A, 0xA3A1, 0xA3A1, 0x0242, 0xA3A8, 0xA3A9, 0x0244,
@@ -15,3 +17,5 @@
     0xA3DD, 0xA3DD, 0x1E1E, 0xA3DF, 0xA3DF, 0x0258, 0xA3FB, 0xA3FB, 0x0254,
     0xA3FD, 0xA3FD, 0x0255, 0xA3FE, 0xA3FE, 0x1E1F,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/GB1/GBK-EUC-H_2.cpp b/core/fpdfapi/cmaps/GB1/GBK-EUC-H_2.cpp
index 644679f..5cfc25f 100644
--- a/core/fpdfapi/cmaps/GB1/GBK-EUC-H_2.cpp
+++ b/core/fpdfapi/cmaps/GB1/GBK-EUC-H_2.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/GB1/cmaps_gb1.h"
 
-const uint16_t kFXCMAP_GBK_EUC_H_2[4071 * 3] = {
+namespace fxcmap {
+
+const uint16_t kGBK_EUC_H_2[4071 * 3] = {
     0x0020, 0x0020, 0x1E24, 0x0021, 0x007E, 0x032E, 0x8140, 0x8178, 0x2758,
     0x8179, 0x8179, 0x2059, 0x817A, 0x817E, 0x2791, 0x8180, 0x8185, 0x2796,
     0x8186, 0x8186, 0x21F1, 0x8187, 0x81EC, 0x279C, 0x81ED, 0x81ED, 0x1FF2,
@@ -1365,3 +1367,5 @@
     0xFD9E, 0xFD9E, 0x40D3, 0xFD9F, 0xFD9F, 0x200C, 0xFDA0, 0xFDA0, 0x5083,
     0xFE40, 0xFE40, 0x1259, 0xFE41, 0xFE7E, 0x5610, 0xFE80, 0xFEA0, 0x564E,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/GB1/GBK-EUC-V_2.cpp b/core/fpdfapi/cmaps/GB1/GBK-EUC-V_2.cpp
index 96ad2f0..ea59b41 100644
--- a/core/fpdfapi/cmaps/GB1/GBK-EUC-V_2.cpp
+++ b/core/fpdfapi/cmaps/GB1/GBK-EUC-V_2.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/GB1/cmaps_gb1.h"
 
-const uint16_t kFXCMAP_GBK_EUC_V_2[20 * 3] = {
+namespace fxcmap {
+
+const uint16_t kGBK_EUC_V_2[20 * 3] = {
     0xA1A2, 0xA1A2, 0x023F, 0xA1A3, 0xA1A3, 0x023E, 0xA1AA, 0xA1AA, 0x0256,
     0xA1AB, 0xA1AC, 0x1E18, 0xA1AD, 0xA1AD, 0x0257, 0xA1B2, 0xA1BF, 0x0246,
     0xA1FE, 0xA1FE, 0x1E1A, 0xA3A1, 0xA3A1, 0x0242, 0xA3A8, 0xA3A9, 0x0244,
@@ -15,3 +17,5 @@
     0xA3DD, 0xA3DD, 0x1E1E, 0xA3DF, 0xA3DF, 0x0258, 0xA3FB, 0xA3FB, 0x0254,
     0xA3FD, 0xA3FD, 0x0255, 0xA3FE, 0xA3FE, 0x1E1F,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/GB1/GBK2K-H_5.cpp b/core/fpdfapi/cmaps/GB1/GBK2K-H_5.cpp
index 73485fd..4ac5804 100644
--- a/core/fpdfapi/cmaps/GB1/GBK2K-H_5.cpp
+++ b/core/fpdfapi/cmaps/GB1/GBK2K-H_5.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/GB1/cmaps_gb1.h"
 
-const uint16_t kFXCMAP_GBK2K_H_5[4071 * 3] = {
+namespace fxcmap {
+
+const uint16_t kGBK2K_H_5[4071 * 3] = {
     0x0020, 0x007E, 0x0001, 0x8140, 0x8178, 0x2758, 0x8179, 0x8179, 0x2059,
     0x817A, 0x817E, 0x2791, 0x8180, 0x8185, 0x2796, 0x8186, 0x8186, 0x21F1,
     0x8187, 0x81EC, 0x279C, 0x81ED, 0x81ED, 0x1FF2, 0x81EE, 0x81F5, 0x2802,
@@ -1366,7 +1368,7 @@
     0xFE40, 0xFE40, 0x1259, 0xFE41, 0xFE7E, 0x5610, 0xFE80, 0xFEA0, 0x564E,
 };
 
-const FXCMAP_DWordCIDMap kFXCMAP_GBK2K_H_5_DWord[1017] = {
+const DWordCIDMap kGBK2K_H_5_DWord[1017] = {
     {0x8130, 0x8436, 0x8436, 0x5752}, {0x8138, 0xFD38, 0xFD39, 0x579C},
     {0x8138, 0xFE30, 0xFE39, 0x579E}, {0x8139, 0x8130, 0x8137, 0x57A8},
     {0x8139, 0x8139, 0x8139, 0x57B0}, {0x8139, 0x8230, 0x8239, 0x57B1},
@@ -1877,3 +1879,5 @@
     {0x8236, 0x9230, 0x9239, 0x7632}, {0x8236, 0x9330, 0x9339, 0x763C},
     {0x8236, 0x9430, 0x9435, 0x7646},
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/GB1/GBK2K-V_5.cpp b/core/fpdfapi/cmaps/GB1/GBK2K-V_5.cpp
index a9e5cde..904253f 100644
--- a/core/fpdfapi/cmaps/GB1/GBK2K-V_5.cpp
+++ b/core/fpdfapi/cmaps/GB1/GBK2K-V_5.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/GB1/cmaps_gb1.h"
 
-const uint16_t kFXCMAP_GBK2K_V_5[41 * 3] = {
+namespace fxcmap {
+
+const uint16_t kGBK2K_V_5[41 * 3] = {
     0xA1A2, 0xA1A2, 0x023F, 0xA1A3, 0xA1A3, 0x023E, 0xA1AA, 0xA1AA, 0x0256,
     0xA1AB, 0xA1AC, 0x1E18, 0xA1AD, 0xA1AD, 0x0257, 0xA1B2, 0xA1BF, 0x0246,
     0xA1FE, 0xA1FE, 0x1E1A, 0xA3A1, 0xA3A1, 0x0242, 0xA3A8, 0xA3A9, 0x0244,
@@ -22,3 +24,5 @@
     0xA5E3, 0xA5E3, 0x5773, 0xA5E5, 0xA5E5, 0x5775, 0xA5E7, 0xA5E7, 0x5774,
     0xA5EE, 0xA5EE, 0x5772, 0xA960, 0xA960, 0x577A,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/GB1/GBKp-EUC-H_2.cpp b/core/fpdfapi/cmaps/GB1/GBKp-EUC-H_2.cpp
index 43ea1a0..2de5aea 100644
--- a/core/fpdfapi/cmaps/GB1/GBKp-EUC-H_2.cpp
+++ b/core/fpdfapi/cmaps/GB1/GBKp-EUC-H_2.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/GB1/cmaps_gb1.h"
 
-const uint16_t kFXCMAP_GBKp_EUC_H_2[4070 * 3] = {
+namespace fxcmap {
+
+const uint16_t kGBKp_EUC_H_2[4070 * 3] = {
     0x0020, 0x007E, 0x0001, 0x8140, 0x8178, 0x2758, 0x8179, 0x8179, 0x2059,
     0x817A, 0x817E, 0x2791, 0x8180, 0x8185, 0x2796, 0x8186, 0x8186, 0x21F1,
     0x8187, 0x81EC, 0x279C, 0x81ED, 0x81ED, 0x1FF2, 0x81EE, 0x81F5, 0x2802,
@@ -1365,3 +1367,5 @@
     0xFD9F, 0xFD9F, 0x200C, 0xFDA0, 0xFDA0, 0x5083, 0xFE40, 0xFE40, 0x1259,
     0xFE41, 0xFE7E, 0x5610, 0xFE80, 0xFEA0, 0x564E,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/GB1/GBKp-EUC-V_2.cpp b/core/fpdfapi/cmaps/GB1/GBKp-EUC-V_2.cpp
index 3c8e65d..aa55cf8 100644
--- a/core/fpdfapi/cmaps/GB1/GBKp-EUC-V_2.cpp
+++ b/core/fpdfapi/cmaps/GB1/GBKp-EUC-V_2.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/GB1/cmaps_gb1.h"
 
-const uint16_t kFXCMAP_GBKp_EUC_V_2[20 * 3] = {
+namespace fxcmap {
+
+const uint16_t kGBKp_EUC_V_2[20 * 3] = {
     0xA1A2, 0xA1A2, 0x023F, 0xA1A3, 0xA1A3, 0x023E, 0xA1AA, 0xA1AA, 0x0256,
     0xA1AB, 0xA1AC, 0x1E18, 0xA1AD, 0xA1AD, 0x0257, 0xA1B2, 0xA1BF, 0x0246,
     0xA1FE, 0xA1FE, 0x1E1A, 0xA3A1, 0xA3A1, 0x0242, 0xA3A8, 0xA3A9, 0x0244,
@@ -15,3 +17,5 @@
     0xA3DD, 0xA3DD, 0x1E1E, 0xA3DF, 0xA3DF, 0x0258, 0xA3FB, 0xA3FB, 0x0254,
     0xA3FD, 0xA3FD, 0x0255, 0xA3FE, 0xA3FE, 0x1E1F,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/GB1/GBpc-EUC-H_0.cpp b/core/fpdfapi/cmaps/GB1/GBpc-EUC-H_0.cpp
index 8c670b5..f1f6dd3 100644
--- a/core/fpdfapi/cmaps/GB1/GBpc-EUC-H_0.cpp
+++ b/core/fpdfapi/cmaps/GB1/GBpc-EUC-H_0.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/GB1/cmaps_gb1.h"
 
-const uint16_t kFXCMAP_GBpc_EUC_H_0[91 * 3] = {
+namespace fxcmap {
+
+const uint16_t kGBpc_EUC_H_0[91 * 3] = {
     0x0020, 0x007E, 0x0001, 0x0080, 0x0080, 0x1E20, 0x00FD, 0x00FF, 0x1E21,
     0xA1A1, 0xA1FE, 0x0060, 0xA2B1, 0xA2E2, 0x00BE, 0xA2E5, 0xA2EE, 0x00F0,
     0xA2F1, 0xA2FC, 0x00FA, 0xA3A1, 0xA3FE, 0x0106, 0xA4A1, 0xA4F3, 0x0164,
@@ -39,3 +41,5 @@
     0xF4A1, 0xF4FE, 0x1C9F, 0xF5A1, 0xF5FE, 0x1CFD, 0xF6A1, 0xF6FE, 0x1D5B,
     0xF7A1, 0xF7FE, 0x1DB9,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/GB1/GBpc-EUC-V_0.cpp b/core/fpdfapi/cmaps/GB1/GBpc-EUC-V_0.cpp
index 38b7ff9..3b53117 100644
--- a/core/fpdfapi/cmaps/GB1/GBpc-EUC-V_0.cpp
+++ b/core/fpdfapi/cmaps/GB1/GBpc-EUC-V_0.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/GB1/cmaps_gb1.h"
 
-const uint16_t kFXCMAP_GBpc_EUC_V_0[20 * 3] = {
+namespace fxcmap {
+
+const uint16_t kGBpc_EUC_V_0[20 * 3] = {
     0xA1A2, 0xA1A2, 0x023F, 0xA1A3, 0xA1A3, 0x023E, 0xA1AA, 0xA1AA, 0x0256,
     0xA1AB, 0xA1AC, 0x1E18, 0xA1AD, 0xA1AD, 0x0257, 0xA1B2, 0xA1BF, 0x0246,
     0xA1FE, 0xA1FE, 0x1E1A, 0xA3A1, 0xA3A1, 0x0242, 0xA3A8, 0xA3A9, 0x0244,
@@ -15,3 +17,5 @@
     0xA3DD, 0xA3DD, 0x1E1E, 0xA3DF, 0xA3DF, 0x0258, 0xA3FB, 0xA3FB, 0x0254,
     0xA3FD, 0xA3FD, 0x0255, 0xA3FE, 0xA3FE, 0x1E1F,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/GB1/UniGB-UCS2-H_4.cpp b/core/fpdfapi/cmaps/GB1/UniGB-UCS2-H_4.cpp
index aa49016..a787a34 100644
--- a/core/fpdfapi/cmaps/GB1/UniGB-UCS2-H_4.cpp
+++ b/core/fpdfapi/cmaps/GB1/UniGB-UCS2-H_4.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/GB1/cmaps_gb1.h"
 
-const uint16_t kFXCMAP_UniGB_UCS2_H_4[13825 * 3] = {
+namespace fxcmap {
+
+const uint16_t kUniGB_UCS2_H_4[13825 * 3] = {
     0x0020, 0x007E, 0x0001, 0x00A4, 0x00A4, 0x00A7, 0x00A5, 0x00A5, 0x5752,
     0x00A7, 0x00A7, 0x00AB, 0x00A8, 0x00A8, 0x0066, 0x00B0, 0x00B0, 0x00A2,
     0x00B1, 0x00B1, 0x007F, 0x00D7, 0x00D7, 0x0080, 0x00E0, 0x00E0, 0x029F,
@@ -4617,3 +4619,5 @@
     0xFFE2, 0xFFE2, 0x271E, 0xFFE3, 0xFFE3, 0x0163, 0xFFE4, 0xFFE4, 0x271F,
     0xFFE5, 0xFFE5, 0x0109,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/GB1/UniGB-UCS2-V_4.cpp b/core/fpdfapi/cmaps/GB1/UniGB-UCS2-V_4.cpp
index aa0675f..34ab6e7 100644
--- a/core/fpdfapi/cmaps/GB1/UniGB-UCS2-V_4.cpp
+++ b/core/fpdfapi/cmaps/GB1/UniGB-UCS2-V_4.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/GB1/cmaps_gb1.h"
 
-const uint16_t kFXCMAP_UniGB_UCS2_V_4[24 * 3] = {
+namespace fxcmap {
+
+const uint16_t kUniGB_UCS2_V_4[24 * 3] = {
     0x2014, 0x2014, 0x0256, 0x2026, 0x2026, 0x0257, 0x2225, 0x2225, 0x1E1C,
     0x3001, 0x3001, 0x023F, 0x3002, 0x3002, 0x023E, 0x3008, 0x300F, 0x0248,
     0x3010, 0x3011, 0x0252, 0x3013, 0x3013, 0x1E1A, 0x3014, 0x3015, 0x0246,
@@ -16,3 +18,5 @@
     0xFF3D, 0xFF3D, 0x1E1E, 0xFF3F, 0xFF3F, 0x0258, 0xFF5B, 0xFF5B, 0x0254,
     0xFF5D, 0xFF5D, 0x0255, 0xFF5E, 0xFF5E, 0x1E18, 0xFFE3, 0xFFE3, 0x1E1F,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/GB1/cmaps_gb1.cpp b/core/fpdfapi/cmaps/GB1/cmaps_gb1.cpp
index 208eac7..03ef2d7 100644
--- a/core/fpdfapi/cmaps/GB1/cmaps_gb1.cpp
+++ b/core/fpdfapi/cmaps/GB1/cmaps_gb1.cpp
@@ -8,29 +8,25 @@
 
 #include <iterator>
 
-const FXCMAP_CMap kFXCMAP_GB1_cmaps[] = {
-    {"GB-EUC-H", kFXCMAP_GB_EUC_H_0, nullptr, 90, 0, FXCMAP_CMap::Range, 0},
-    {"GB-EUC-V", kFXCMAP_GB_EUC_V_0, nullptr, 20, 0, FXCMAP_CMap::Range, -1},
-    {"GBpc-EUC-H", kFXCMAP_GBpc_EUC_H_0, nullptr, 91, 0, FXCMAP_CMap::Range, 0},
-    {"GBpc-EUC-V", kFXCMAP_GBpc_EUC_V_0, nullptr, 20, 0, FXCMAP_CMap::Range,
-     -1},
-    {"GBK-EUC-H", kFXCMAP_GBK_EUC_H_2, nullptr, 4071, 0, FXCMAP_CMap::Range, 0},
-    {"GBK-EUC-V", kFXCMAP_GBK_EUC_V_2, nullptr, 20, 0, FXCMAP_CMap::Range, -1},
-    {"GBKp-EUC-H", kFXCMAP_GBKp_EUC_H_2, nullptr, 4070, 0, FXCMAP_CMap::Range,
-     -2},
-    {"GBKp-EUC-V", kFXCMAP_GBKp_EUC_V_2, nullptr, 20, 0, FXCMAP_CMap::Range,
-     -1},
-    {"GBK2K-H", kFXCMAP_GBK2K_H_5, kFXCMAP_GBK2K_H_5_DWord, 4071, 1017,
-     FXCMAP_CMap::Range, -4},
-    {"GBK2K-V", kFXCMAP_GBK2K_V_5, nullptr, 41, 0, FXCMAP_CMap::Range, -1},
-    {"UniGB-UCS2-H", kFXCMAP_UniGB_UCS2_H_4, nullptr, 13825, 0,
-     FXCMAP_CMap::Range, 0},
-    {"UniGB-UCS2-V", kFXCMAP_UniGB_UCS2_V_4, nullptr, 24, 0, FXCMAP_CMap::Range,
-     -1},
-    {"UniGB-UTF16-H", kFXCMAP_UniGB_UCS2_H_4, nullptr, 13825, 0,
-     FXCMAP_CMap::Range, 0},
-    {"UniGB-UTF16-V", kFXCMAP_UniGB_UCS2_V_4, nullptr, 24, 0,
-     FXCMAP_CMap::Range, -1},
+namespace fxcmap {
+
+const CMap kGB1_cmaps[] = {
+    {"GB-EUC-H", kGB_EUC_H_0, nullptr, 90, 0, CMap::Range, 0},
+    {"GB-EUC-V", kGB_EUC_V_0, nullptr, 20, 0, CMap::Range, -1},
+    {"GBpc-EUC-H", kGBpc_EUC_H_0, nullptr, 91, 0, CMap::Range, 0},
+    {"GBpc-EUC-V", kGBpc_EUC_V_0, nullptr, 20, 0, CMap::Range, -1},
+    {"GBK-EUC-H", kGBK_EUC_H_2, nullptr, 4071, 0, CMap::Range, 0},
+    {"GBK-EUC-V", kGBK_EUC_V_2, nullptr, 20, 0, CMap::Range, -1},
+    {"GBKp-EUC-H", kGBKp_EUC_H_2, nullptr, 4070, 0, CMap::Range, -2},
+    {"GBKp-EUC-V", kGBKp_EUC_V_2, nullptr, 20, 0, CMap::Range, -1},
+    {"GBK2K-H", kGBK2K_H_5, kGBK2K_H_5_DWord, 4071, 1017, CMap::Range, -4},
+    {"GBK2K-V", kGBK2K_V_5, nullptr, 41, 0, CMap::Range, -1},
+    {"UniGB-UCS2-H", kUniGB_UCS2_H_4, nullptr, 13825, 0, CMap::Range, 0},
+    {"UniGB-UCS2-V", kUniGB_UCS2_V_4, nullptr, 24, 0, CMap::Range, -1},
+    {"UniGB-UTF16-H", kUniGB_UCS2_H_4, nullptr, 13825, 0, CMap::Range, 0},
+    {"UniGB-UTF16-V", kUniGB_UCS2_V_4, nullptr, 24, 0, CMap::Range, -1},
 };
 
-const size_t kFXCMAP_GB1_cmaps_size = std::size(kFXCMAP_GB1_cmaps);
+const size_t kGB1_cmaps_size = std::size(kGB1_cmaps);
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/GB1/cmaps_gb1.h b/core/fpdfapi/cmaps/GB1/cmaps_gb1.h
index e935dba..a226266 100644
--- a/core/fpdfapi/cmaps/GB1/cmaps_gb1.h
+++ b/core/fpdfapi/cmaps/GB1/cmaps_gb1.h
@@ -8,24 +8,29 @@
 #define CORE_FPDFAPI_CMAPS_GB1_CMAPS_GB1_H_
 
 #include <stddef.h>
+#include <stdint.h>
 
 #include "core/fpdfapi/cmaps/fpdf_cmaps.h"
 
-extern const uint16_t kFXCMAP_GB_EUC_H_0[];
-extern const uint16_t kFXCMAP_GB_EUC_V_0[];
-extern const uint16_t kFXCMAP_GBpc_EUC_H_0[];
-extern const uint16_t kFXCMAP_GBpc_EUC_V_0[];
-extern const uint16_t kFXCMAP_GBK_EUC_H_2[];
-extern const uint16_t kFXCMAP_GBK_EUC_V_2[];
-extern const uint16_t kFXCMAP_GBKp_EUC_H_2[];
-extern const uint16_t kFXCMAP_GBKp_EUC_V_2[];
-extern const uint16_t kFXCMAP_GBK2K_H_5[];
-extern const FXCMAP_DWordCIDMap kFXCMAP_GBK2K_H_5_DWord[];
-extern const uint16_t kFXCMAP_GBK2K_V_5[];
-extern const uint16_t kFXCMAP_UniGB_UCS2_H_4[];
-extern const uint16_t kFXCMAP_UniGB_UCS2_V_4[];
-extern const uint16_t kFXCMAP_GB1CID2Unicode_5[30284];
-extern const FXCMAP_CMap kFXCMAP_GB1_cmaps[];
-extern const size_t kFXCMAP_GB1_cmaps_size;
+namespace fxcmap {
+
+extern const uint16_t kGB_EUC_H_0[];
+extern const uint16_t kGB_EUC_V_0[];
+extern const uint16_t kGBpc_EUC_H_0[];
+extern const uint16_t kGBpc_EUC_V_0[];
+extern const uint16_t kGBK_EUC_H_2[];
+extern const uint16_t kGBK_EUC_V_2[];
+extern const uint16_t kGBKp_EUC_H_2[];
+extern const uint16_t kGBKp_EUC_V_2[];
+extern const uint16_t kGBK2K_H_5[];
+extern const DWordCIDMap kGBK2K_H_5_DWord[];
+extern const uint16_t kGBK2K_V_5[];
+extern const uint16_t kUniGB_UCS2_H_4[];
+extern const uint16_t kUniGB_UCS2_V_4[];
+extern const uint16_t kGB1CID2Unicode_5[30284];
+extern const CMap kGB1_cmaps[];
+extern const size_t kGB1_cmaps_size;
+
+}  // namespace fxcmap
 
 #endif  // CORE_FPDFAPI_CMAPS_GB1_CMAPS_GB1_H_
diff --git a/core/fpdfapi/cmaps/Japan1/83pv-RKSJ-H_1.cpp b/core/fpdfapi/cmaps/Japan1/83pv-RKSJ-H_1.cpp
index 8892336..51b49e2 100644
--- a/core/fpdfapi/cmaps/Japan1/83pv-RKSJ-H_1.cpp
+++ b/core/fpdfapi/cmaps/Japan1/83pv-RKSJ-H_1.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Japan1/cmaps_japan1.h"
 
-const uint16_t kFXCMAP_83pv_RKSJ_H_1[222 * 3] = {
+namespace fxcmap {
+
+const uint16_t k83pv_RKSJ_H_1[222 * 3] = {
     0x0020, 0x007E, 0x0001, 0x0080, 0x0080, 0x0061, 0x00A0, 0x00DF, 0x0146,
     0x00FD, 0x00FD, 0x0098, 0x00FE, 0x00FE, 0x00E4, 0x00FF, 0x00FF, 0x007C,
     0x8140, 0x817E, 0x0279, 0x8180, 0x81AC, 0x02B8, 0x81B8, 0x81BF, 0x02E5,
@@ -82,3 +84,5 @@
     0xEE90, 0xEE90, 0x02FA, 0xEE91, 0xEE91, 0x02F9, 0xEE92, 0xEE92, 0x0301,
     0xEE93, 0xEE99, 0x1DC8, 0xEE9A, 0xEE9A, 0x0300, 0xEE9B, 0xEE9C, 0x1DCF,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Japan1/90ms-RKSJ-H_2.cpp b/core/fpdfapi/cmaps/Japan1/90ms-RKSJ-H_2.cpp
index 9faf7a3..212f809 100644
--- a/core/fpdfapi/cmaps/Japan1/90ms-RKSJ-H_2.cpp
+++ b/core/fpdfapi/cmaps/Japan1/90ms-RKSJ-H_2.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Japan1/cmaps_japan1.h"
 
-const uint16_t kFXCMAP_90ms_RKSJ_H_2[171 * 3] = {
+namespace fxcmap {
+
+const uint16_t k90ms_RKSJ_H_2[171 * 3] = {
     0x0020, 0x007D, 0x00E7, 0x007E, 0x007E, 0x0277, 0x00A0, 0x00DF, 0x0146,
     0x8140, 0x817E, 0x0279, 0x8180, 0x81AC, 0x02B8, 0x81B8, 0x81BF, 0x02E5,
     0x81C8, 0x81CE, 0x02ED, 0x81DA, 0x81E8, 0x02F4, 0x81F0, 0x81F7, 0x0303,
@@ -65,3 +67,5 @@
     0xFA80, 0xFACF, 0x20CA, 0xFAD0, 0xFAD0, 0x07C9, 0xFAD1, 0xFAFC, 0x211A,
     0xFB40, 0xFB7E, 0x2146, 0xFB80, 0xFBFC, 0x2185, 0xFC40, 0xFC4B, 0x2202,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Japan1/90ms-RKSJ-V_2.cpp b/core/fpdfapi/cmaps/Japan1/90ms-RKSJ-V_2.cpp
index e243e6a..5303c72 100644
--- a/core/fpdfapi/cmaps/Japan1/90ms-RKSJ-V_2.cpp
+++ b/core/fpdfapi/cmaps/Japan1/90ms-RKSJ-V_2.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Japan1/cmaps_japan1.h"
 
-const uint16_t kFXCMAP_90ms_RKSJ_V_2[78 * 3] = {
+namespace fxcmap {
+
+const uint16_t k90ms_RKSJ_V_2[78 * 3] = {
     0x8141, 0x8142, 0x1ECF, 0x8143, 0x8143, 0x204C, 0x8144, 0x8144, 0x2052,
     0x8150, 0x8151, 0x1ED1, 0x815B, 0x815D, 0x1ED3, 0x8160, 0x8164, 0x1ED6,
     0x8169, 0x817A, 0x1EDB, 0x8181, 0x8181, 0x1EED, 0x81A8, 0x81A8, 0x02E3,
@@ -34,3 +36,5 @@
     0x8768, 0x8768, 0x2098, 0x8769, 0x876A, 0x1F0E, 0x876B, 0x876B, 0x209C,
     0x876C, 0x876D, 0x1F11, 0x876E, 0x876E, 0x209D, 0x8780, 0x8781, 0x1F14,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Japan1/90msp-RKSJ-H_2.cpp b/core/fpdfapi/cmaps/Japan1/90msp-RKSJ-H_2.cpp
index 7082aaf..a77d0e1 100644
--- a/core/fpdfapi/cmaps/Japan1/90msp-RKSJ-H_2.cpp
+++ b/core/fpdfapi/cmaps/Japan1/90msp-RKSJ-H_2.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Japan1/cmaps_japan1.h"
 
-const uint16_t kFXCMAP_90msp_RKSJ_H_2[170 * 3] = {
+namespace fxcmap {
+
+const uint16_t k90msp_RKSJ_H_2[170 * 3] = {
     0x0020, 0x007E, 0x0001, 0x00A0, 0x00DF, 0x0146, 0x8140, 0x817E, 0x0279,
     0x8180, 0x81AC, 0x02B8, 0x81B8, 0x81BF, 0x02E5, 0x81C8, 0x81CE, 0x02ED,
     0x81DA, 0x81E8, 0x02F4, 0x81F0, 0x81F7, 0x0303, 0x81FC, 0x81FC, 0x030B,
@@ -65,3 +67,5 @@
     0xFAD0, 0xFAD0, 0x07C9, 0xFAD1, 0xFAFC, 0x211A, 0xFB40, 0xFB7E, 0x2146,
     0xFB80, 0xFBFC, 0x2185, 0xFC40, 0xFC4B, 0x2202,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Japan1/90msp-RKSJ-V_2.cpp b/core/fpdfapi/cmaps/Japan1/90msp-RKSJ-V_2.cpp
index 165b36f..ee2f799 100644
--- a/core/fpdfapi/cmaps/Japan1/90msp-RKSJ-V_2.cpp
+++ b/core/fpdfapi/cmaps/Japan1/90msp-RKSJ-V_2.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Japan1/cmaps_japan1.h"
 
-const uint16_t kFXCMAP_90msp_RKSJ_V_2[78 * 3] = {
+namespace fxcmap {
+
+const uint16_t k90msp_RKSJ_V_2[78 * 3] = {
     0x8141, 0x8142, 0x1ECF, 0x8143, 0x8143, 0x204C, 0x8144, 0x8144, 0x2052,
     0x8150, 0x8151, 0x1ED1, 0x815B, 0x815D, 0x1ED3, 0x8160, 0x8164, 0x1ED6,
     0x8169, 0x817A, 0x1EDB, 0x8181, 0x8181, 0x1EED, 0x81A8, 0x81A8, 0x02E3,
@@ -34,3 +36,5 @@
     0x8768, 0x8768, 0x2098, 0x8769, 0x876A, 0x1F0E, 0x876B, 0x876B, 0x209C,
     0x876C, 0x876D, 0x1F11, 0x876E, 0x876E, 0x209D, 0x8780, 0x8781, 0x1F14,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Japan1/90pv-RKSJ-H_1.cpp b/core/fpdfapi/cmaps/Japan1/90pv-RKSJ-H_1.cpp
index fca2f57..0bf3f2f 100644
--- a/core/fpdfapi/cmaps/Japan1/90pv-RKSJ-H_1.cpp
+++ b/core/fpdfapi/cmaps/Japan1/90pv-RKSJ-H_1.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Japan1/cmaps_japan1.h"
 
-const uint16_t kFXCMAP_90pv_RKSJ_H_1[263 * 3] = {
+namespace fxcmap {
+
+const uint16_t k90pv_RKSJ_H_1[263 * 3] = {
     0x0020, 0x007E, 0x0001, 0x0080, 0x0080, 0x0061, 0x00A0, 0x00DF, 0x0146,
     0x00FD, 0x00FD, 0x0098, 0x00FE, 0x00FE, 0x00E4, 0x00FF, 0x00FF, 0x007C,
     0x8140, 0x817E, 0x0279, 0x8180, 0x81AC, 0x02B8, 0x81B8, 0x81BF, 0x02E5,
@@ -96,3 +98,5 @@
     0xED83, 0xED83, 0x1EFE, 0xED85, 0xED85, 0x1EFF, 0xED87, 0xED87, 0x1F00,
     0xED8E, 0xED8E, 0x1F01, 0xED95, 0xED96, 0x1F02,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Japan1/Add-RKSJ-H_1.cpp b/core/fpdfapi/cmaps/Japan1/Add-RKSJ-H_1.cpp
index beab5fa..69af127 100644
--- a/core/fpdfapi/cmaps/Japan1/Add-RKSJ-H_1.cpp
+++ b/core/fpdfapi/cmaps/Japan1/Add-RKSJ-H_1.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Japan1/cmaps_japan1.h"
 
-const uint16_t kFXCMAP_Add_RKSJ_H_1[635 * 3] = {
+namespace fxcmap {
+
+const uint16_t kAdd_RKSJ_H_1[635 * 3] = {
     0x0020, 0x007E, 0x00E7, 0x00A0, 0x00DF, 0x0146, 0x8140, 0x817E, 0x0279,
     0x8180, 0x81AC, 0x02B8, 0x81B8, 0x81BF, 0x02E5, 0x81C8, 0x81CE, 0x02ED,
     0x81DA, 0x81E8, 0x02F4, 0x81F0, 0x81F7, 0x0303, 0x81FC, 0x81FC, 0x030B,
@@ -220,3 +222,5 @@
     0xEF52, 0xEF63, 0x1EDB, 0xEF64, 0xEF79, 0x1EEE, 0xEF7A, 0xEF7B, 0x2048,
     0xEF8D, 0xEF90, 0x02E0, 0xEF91, 0xEF94, 0x1FF6,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Japan1/Add-RKSJ-V_1.cpp b/core/fpdfapi/cmaps/Japan1/Add-RKSJ-V_1.cpp
index a9cdd44..ce351ff 100644
--- a/core/fpdfapi/cmaps/Japan1/Add-RKSJ-V_1.cpp
+++ b/core/fpdfapi/cmaps/Japan1/Add-RKSJ-V_1.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Japan1/cmaps_japan1.h"
 
-const uint16_t kFXCMAP_Add_RKSJ_V_1[57 * 3] = {
+namespace fxcmap {
+
+const uint16_t kAdd_RKSJ_V_1[57 * 3] = {
     0x8141, 0x8142, 0x1ECF, 0x8143, 0x8143, 0x204C, 0x8144, 0x8144, 0x2052,
     0x8150, 0x8151, 0x1ED1, 0x815B, 0x815D, 0x1ED3, 0x8160, 0x8164, 0x1ED6,
     0x8165, 0x8165, 0x205A, 0x8166, 0x8166, 0x2053, 0x8167, 0x8167, 0x2058,
@@ -27,3 +29,5 @@
     0xEC8D, 0xEC8D, 0x20A6, 0xEC8E, 0xEC8E, 0x20A5, 0xEC8F, 0xEC8F, 0x20A1,
     0xEC90, 0xEC90, 0x20A4, 0xEC95, 0xEC95, 0x2084, 0xEF92, 0xEF92, 0x208D,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Japan1/Adobe-Japan1-UCS2_4.cpp b/core/fpdfapi/cmaps/Japan1/Adobe-Japan1-UCS2_4.cpp
index ef02d78..758bfeb 100644
--- a/core/fpdfapi/cmaps/Japan1/Adobe-Japan1-UCS2_4.cpp
+++ b/core/fpdfapi/cmaps/Japan1/Adobe-Japan1-UCS2_4.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Japan1/cmaps_japan1.h"
 
-const uint16_t kFXCMAP_Japan1CID2Unicode_4[15444] = {
+namespace fxcmap {
+
+const uint16_t kJapan1CID2Unicode_4[15444] = {
     0xFFFD, 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
     0x0028, 0x0029, 0x002A, 0x002B, 0x002C, 0x002D, 0x002E, 0x002F, 0x0030,
     0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, 0x0038, 0x0039,
@@ -1724,3 +1726,5 @@
     0x440C, 0x3E8A, 0xFFFD, 0xFFFD, 0x4BE8, 0xFFFD, 0x3EDA, 0x3B22, 0xFFFD,
     0x457A, 0x4093, 0xFFFD, 0x4665, 0x4103, 0x4293, 0x46AE, 0x3488, 0xFFFD,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Japan1/EUC-H_1.cpp b/core/fpdfapi/cmaps/Japan1/EUC-H_1.cpp
index 7dc87b8..c4675be 100644
--- a/core/fpdfapi/cmaps/Japan1/EUC-H_1.cpp
+++ b/core/fpdfapi/cmaps/Japan1/EUC-H_1.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Japan1/cmaps_japan1.h"
 
-const uint16_t kFXCMAP_EUC_H_1[120 * 3] = {
+namespace fxcmap {
+
+const uint16_t kEUC_H_1[120 * 3] = {
     0x0020, 0x007E, 0x00E7, 0x8EA0, 0x8EDF, 0x0146, 0xA1A1, 0xA1FE, 0x0279,
     0xA2A1, 0xA2AE, 0x02D7, 0xA2BA, 0xA2C1, 0x02E5, 0xA2CA, 0xA2D0, 0x02ED,
     0xA2DC, 0xA2EA, 0x02F4, 0xA2F2, 0xA2F9, 0x0303, 0xA2FE, 0xA2FE, 0x030B,
@@ -48,3 +50,5 @@
     0xF0A1, 0xF0FE, 0x1BBA, 0xF1A1, 0xF1FE, 0x1C18, 0xF2A1, 0xF2FE, 0x1C76,
     0xF3A1, 0xF3FE, 0x1CD4, 0xF4A1, 0xF4A4, 0x1D32, 0xF4A5, 0xF4A6, 0x205C,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Japan1/EUC-V_1.cpp b/core/fpdfapi/cmaps/Japan1/EUC-V_1.cpp
index 05f2b14..c507656 100644
--- a/core/fpdfapi/cmaps/Japan1/EUC-V_1.cpp
+++ b/core/fpdfapi/cmaps/Japan1/EUC-V_1.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Japan1/cmaps_japan1.h"
 
-const uint16_t kFXCMAP_EUC_V_1[27 * 3] = {
+namespace fxcmap {
+
+const uint16_t kEUC_V_1[27 * 3] = {
     0xA1A2, 0xA1A3, 0x1ECF, 0xA1B1, 0xA1B2, 0x1ED1, 0xA1BC, 0xA1BE, 0x1ED3,
     0xA1C1, 0xA1C5, 0x1ED6, 0xA1CA, 0xA1DB, 0x1EDB, 0xA1E1, 0xA1E1, 0x1EED,
     0xA4A1, 0xA4A1, 0x1EEE, 0xA4A3, 0xA4A3, 0x1EEF, 0xA4A5, 0xA4A5, 0x1EF0,
@@ -17,3 +19,5 @@
     0xA5C3, 0xA5C3, 0x1EFD, 0xA5E3, 0xA5E3, 0x1EFE, 0xA5E5, 0xA5E5, 0x1EFF,
     0xA5E7, 0xA5E7, 0x1F00, 0xA5EE, 0xA5EE, 0x1F01, 0xA5F5, 0xA5F6, 0x1F02,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Japan1/Ext-RKSJ-H_2.cpp b/core/fpdfapi/cmaps/Japan1/Ext-RKSJ-H_2.cpp
index ec95683..80c0b48 100644
--- a/core/fpdfapi/cmaps/Japan1/Ext-RKSJ-H_2.cpp
+++ b/core/fpdfapi/cmaps/Japan1/Ext-RKSJ-H_2.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Japan1/cmaps_japan1.h"
 
-const uint16_t kFXCMAP_Ext_RKSJ_H_2[665 * 3] = {
+namespace fxcmap {
+
+const uint16_t kExt_RKSJ_H_2[665 * 3] = {
     0x0020, 0x007E, 0x00E7, 0x00A0, 0x00DF, 0x0146, 0x8140, 0x817E, 0x0279,
     0x8180, 0x8188, 0x02B8, 0x8189, 0x8189, 0x1D36, 0x818A, 0x81AC, 0x02C2,
     0x824F, 0x8258, 0x030C, 0x8260, 0x8279, 0x0316, 0x8281, 0x829A, 0x0330,
@@ -230,3 +232,5 @@
     0xEE40, 0xEE7E, 0x2162, 0xEE80, 0xEEEC, 0x21A1, 0xEEEF, 0xEEF8, 0x1F9C,
     0xEEF9, 0xEEF9, 0x02EF, 0xEEFA, 0xEEFC, 0x1F45,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Japan1/Ext-RKSJ-V_2.cpp b/core/fpdfapi/cmaps/Japan1/Ext-RKSJ-V_2.cpp
index 6c3f7c6..f3833bc 100644
--- a/core/fpdfapi/cmaps/Japan1/Ext-RKSJ-V_2.cpp
+++ b/core/fpdfapi/cmaps/Japan1/Ext-RKSJ-V_2.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Japan1/cmaps_japan1.h"
 
-const uint16_t kFXCMAP_Ext_RKSJ_V_2[39 * 3] = {
+namespace fxcmap {
+
+const uint16_t kExt_RKSJ_V_2[39 * 3] = {
     0x8141, 0x8142, 0x1ECF, 0x8143, 0x8143, 0x204C, 0x8144, 0x8144, 0x2052,
     0x814A, 0x814A, 0x2050, 0x814B, 0x814B, 0x204F, 0x815B, 0x815D, 0x1ED3,
     0x8160, 0x8164, 0x1ED6, 0x8165, 0x8165, 0x2059, 0x8166, 0x8166, 0x2054,
@@ -21,3 +23,5 @@
     0x8385, 0x8385, 0x1EFF, 0x8387, 0x8387, 0x1F00, 0x838E, 0x838E, 0x1F01,
     0x8395, 0x8396, 0x1F02, 0x875F, 0x876E, 0x1F04, 0x8780, 0x8781, 0x1F14,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Japan1/H_1.cpp b/core/fpdfapi/cmaps/Japan1/H_1.cpp
index 56637b4..be3694d 100644
--- a/core/fpdfapi/cmaps/Japan1/H_1.cpp
+++ b/core/fpdfapi/cmaps/Japan1/H_1.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Japan1/cmaps_japan1.h"
 
-const uint16_t kFXCMAP_H_1[118 * 3] = {
+namespace fxcmap {
+
+const uint16_t kH_1[118 * 3] = {
     0x2121, 0x217E, 0x0279, 0x2221, 0x222E, 0x02D7, 0x223A, 0x2241, 0x02E5,
     0x224A, 0x2250, 0x02ED, 0x225C, 0x226A, 0x02F4, 0x2272, 0x2279, 0x0303,
     0x227E, 0x227E, 0x030B, 0x2330, 0x2339, 0x030C, 0x2341, 0x235A, 0x0316,
@@ -48,3 +50,5 @@
     0x7221, 0x727E, 0x1C76, 0x7321, 0x737E, 0x1CD4, 0x7421, 0x7424, 0x1D32,
     0x7425, 0x7426, 0x205C,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Japan1/UniJIS-UCS2-HW-H_4.cpp b/core/fpdfapi/cmaps/Japan1/UniJIS-UCS2-HW-H_4.cpp
index b815a9e..aa8565d 100644
--- a/core/fpdfapi/cmaps/Japan1/UniJIS-UCS2-HW-H_4.cpp
+++ b/core/fpdfapi/cmaps/Japan1/UniJIS-UCS2-HW-H_4.cpp
@@ -6,7 +6,11 @@
 
 #include "core/fpdfapi/cmaps/Japan1/cmaps_japan1.h"
 
-const uint16_t kFXCMAP_UniJIS_UCS2_HW_H_4[4 * 3] = {
+namespace fxcmap {
+
+const uint16_t kUniJIS_UCS2_HW_H_4[4 * 3] = {
     0x0020, 0x005B, 0x00E7, 0x005C, 0x005C, 0x220F,
     0x005D, 0x007E, 0x0124, 0x00A5, 0x00A5, 0x0123,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Japan1/UniJIS-UCS2-HW-V_4.cpp b/core/fpdfapi/cmaps/Japan1/UniJIS-UCS2-HW-V_4.cpp
index 63e6e98..aed1f63 100644
--- a/core/fpdfapi/cmaps/Japan1/UniJIS-UCS2-HW-V_4.cpp
+++ b/core/fpdfapi/cmaps/Japan1/UniJIS-UCS2-HW-V_4.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Japan1/cmaps_japan1.h"
 
-const uint16_t kFXCMAP_UniJIS_UCS2_HW_V_4[199 * 3] = {
+namespace fxcmap {
+
+const uint16_t kUniJIS_UCS2_HW_V_4[199 * 3] = {
     0x0020, 0x005B, 0x00E7, 0x005C, 0x005C, 0x220F, 0x005D, 0x007E, 0x0124,
     0x00A5, 0x00A5, 0x0123, 0x00B0, 0x00B0, 0x204D, 0x2010, 0x2010, 0x1ED5,
     0x2015, 0x2015, 0x1ED4, 0x2016, 0x2016, 0x1ED7, 0x2018, 0x2019, 0x2059,
@@ -75,3 +77,5 @@
     0xFF5C, 0xFF5C, 0x1ED8, 0xFF5D, 0xFF5D, 0x1EE2, 0xFF5E, 0xFF5E, 0x1ED6,
     0xFFE3, 0xFFE3, 0x1ED1,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Japan1/UniJIS-UCS2-H_4.cpp b/core/fpdfapi/cmaps/Japan1/UniJIS-UCS2-H_4.cpp
index eb126d6..5496706 100644
--- a/core/fpdfapi/cmaps/Japan1/UniJIS-UCS2-H_4.cpp
+++ b/core/fpdfapi/cmaps/Japan1/UniJIS-UCS2-H_4.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Japan1/cmaps_japan1.h"
 
-const uint16_t kFXCMAP_UniJIS_UCS2_H_4[9772 * 2] = {
+namespace fxcmap {
+
+const uint16_t kUniJIS_UCS2_H_4[9772 * 2] = {
     0x0020, 0x0001, 0x0021, 0x0002, 0x0022, 0x0003, 0x0023, 0x0004, 0x0024,
     0x0005, 0x0025, 0x0006, 0x0026, 0x0007, 0x0027, 0x0008, 0x0028, 0x0009,
     0x0029, 0x000A, 0x002A, 0x000B, 0x002B, 0x000C, 0x002C, 0x000D, 0x002D,
@@ -2180,3 +2182,5 @@
     0xFFE0, 0x02C9, 0xFFE1, 0x02CA, 0xFFE2, 0x02EF, 0xFFE3, 0x0289, 0xFFE4,
     0x1F45, 0xFFE5, 0x02C7, 0xFFE8, 0x0143,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Japan1/UniJIS-UCS2-V_4.cpp b/core/fpdfapi/cmaps/Japan1/UniJIS-UCS2-V_4.cpp
index d29b894..8c2cc89 100644
--- a/core/fpdfapi/cmaps/Japan1/UniJIS-UCS2-V_4.cpp
+++ b/core/fpdfapi/cmaps/Japan1/UniJIS-UCS2-V_4.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Japan1/cmaps_japan1.h"
 
-const uint16_t kFXCMAP_UniJIS_UCS2_V_4[251 * 2] = {
+namespace fxcmap {
+
+const uint16_t kUniJIS_UCS2_V_4[251 * 2] = {
     0x00B0, 0x204D, 0x2010, 0x1ED5, 0x2015, 0x1ED4, 0x2016, 0x1ED7, 0x2018,
     0x2059, 0x2019, 0x205A, 0x201C, 0x2057, 0x201D, 0x2058, 0x2025, 0x1EDA,
     0x2026, 0x1ED9, 0x2032, 0x2051, 0x2033, 0x205B, 0x2190, 0x02E2, 0x2191,
@@ -64,3 +66,5 @@
     0xFF3B, 0x1EDF, 0xFF3D, 0x1EE0, 0xFF3F, 0x1ED2, 0xFF5B, 0x1EE1, 0xFF5C,
     0x1ED8, 0xFF5D, 0x1EE2, 0xFF5E, 0x1ED6, 0xFFE3, 0x1ED1,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Japan1/V_1.cpp b/core/fpdfapi/cmaps/Japan1/V_1.cpp
index e4fbc4d..8fcc59f 100644
--- a/core/fpdfapi/cmaps/Japan1/V_1.cpp
+++ b/core/fpdfapi/cmaps/Japan1/V_1.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Japan1/cmaps_japan1.h"
 
-const uint16_t kFXCMAP_V_1[27 * 3] = {
+namespace fxcmap {
+
+const uint16_t kV_1[27 * 3] = {
     0x2122, 0x2123, 0x1ECF, 0x2131, 0x2132, 0x1ED1, 0x213C, 0x213E, 0x1ED3,
     0x2141, 0x2145, 0x1ED6, 0x214A, 0x215B, 0x1EDB, 0x2161, 0x2161, 0x1EED,
     0x2421, 0x2421, 0x1EEE, 0x2423, 0x2423, 0x1EEF, 0x2425, 0x2425, 0x1EF0,
@@ -17,3 +19,5 @@
     0x2543, 0x2543, 0x1EFD, 0x2563, 0x2563, 0x1EFE, 0x2565, 0x2565, 0x1EFF,
     0x2567, 0x2567, 0x1F00, 0x256E, 0x256E, 0x1F01, 0x2575, 0x2576, 0x1F02,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Japan1/cmaps_japan1.cpp b/core/fpdfapi/cmaps/Japan1/cmaps_japan1.cpp
index b6a00c1..8d48f27 100644
--- a/core/fpdfapi/cmaps/Japan1/cmaps_japan1.cpp
+++ b/core/fpdfapi/cmaps/Japan1/cmaps_japan1.cpp
@@ -8,43 +8,31 @@
 
 #include <iterator>
 
-const FXCMAP_CMap kFXCMAP_Japan1_cmaps[] = {
-    {"83pv-RKSJ-H", kFXCMAP_83pv_RKSJ_H_1, nullptr, 222, 0, FXCMAP_CMap::Range,
-     0},
-    {"90ms-RKSJ-H", kFXCMAP_90ms_RKSJ_H_2, nullptr, 171, 0, FXCMAP_CMap::Range,
-     0},
-    {"90ms-RKSJ-V", kFXCMAP_90ms_RKSJ_V_2, nullptr, 78, 0, FXCMAP_CMap::Range,
-     -1},
-    {"90msp-RKSJ-H", kFXCMAP_90msp_RKSJ_H_2, nullptr, 170, 0,
-     FXCMAP_CMap::Range, -2},
-    {"90msp-RKSJ-V", kFXCMAP_90msp_RKSJ_V_2, nullptr, 78, 0, FXCMAP_CMap::Range,
-     -1},
-    {"90pv-RKSJ-H", kFXCMAP_90pv_RKSJ_H_1, nullptr, 263, 0, FXCMAP_CMap::Range,
-     0},
-    {"Add-RKSJ-H", kFXCMAP_Add_RKSJ_H_1, nullptr, 635, 0, FXCMAP_CMap::Range,
-     0},
-    {"Add-RKSJ-V", kFXCMAP_Add_RKSJ_V_1, nullptr, 57, 0, FXCMAP_CMap::Range,
-     -1},
-    {"EUC-H", kFXCMAP_EUC_H_1, nullptr, 120, 0, FXCMAP_CMap::Range, 0},
-    {"EUC-V", kFXCMAP_EUC_V_1, nullptr, 27, 0, FXCMAP_CMap::Range, -1},
-    {"Ext-RKSJ-H", kFXCMAP_Ext_RKSJ_H_2, nullptr, 665, 0, FXCMAP_CMap::Range,
-     -4},
-    {"Ext-RKSJ-V", kFXCMAP_Ext_RKSJ_V_2, nullptr, 39, 0, FXCMAP_CMap::Range,
-     -1},
-    {"H", kFXCMAP_H_1, nullptr, 118, 0, FXCMAP_CMap::Range, 0},
-    {"V", kFXCMAP_V_1, nullptr, 27, 0, FXCMAP_CMap::Range, -1},
-    {"UniJIS-UCS2-H", kFXCMAP_UniJIS_UCS2_H_4, nullptr, 9772, 0,
-     FXCMAP_CMap::Single, 0},
-    {"UniJIS-UCS2-V", kFXCMAP_UniJIS_UCS2_V_4, nullptr, 251, 0,
-     FXCMAP_CMap::Single, -1},
-    {"UniJIS-UCS2-HW-H", kFXCMAP_UniJIS_UCS2_HW_H_4, nullptr, 4, 0,
-     FXCMAP_CMap::Range, -2},
-    {"UniJIS-UCS2-HW-V", kFXCMAP_UniJIS_UCS2_HW_V_4, nullptr, 199, 0,
-     FXCMAP_CMap::Range, -1},
-    {"UniJIS-UTF16-H", kFXCMAP_UniJIS_UCS2_H_4, nullptr, 9772, 0,
-     FXCMAP_CMap::Single, 0},
-    {"UniJIS-UTF16-V", kFXCMAP_UniJIS_UCS2_V_4, nullptr, 251, 0,
-     FXCMAP_CMap::Single, -1},
+namespace fxcmap {
+
+const CMap kJapan1_cmaps[] = {
+    {"83pv-RKSJ-H", k83pv_RKSJ_H_1, nullptr, 222, 0, CMap::Range, 0},
+    {"90ms-RKSJ-H", k90ms_RKSJ_H_2, nullptr, 171, 0, CMap::Range, 0},
+    {"90ms-RKSJ-V", k90ms_RKSJ_V_2, nullptr, 78, 0, CMap::Range, -1},
+    {"90msp-RKSJ-H", k90msp_RKSJ_H_2, nullptr, 170, 0, CMap::Range, -2},
+    {"90msp-RKSJ-V", k90msp_RKSJ_V_2, nullptr, 78, 0, CMap::Range, -1},
+    {"90pv-RKSJ-H", k90pv_RKSJ_H_1, nullptr, 263, 0, CMap::Range, 0},
+    {"Add-RKSJ-H", kAdd_RKSJ_H_1, nullptr, 635, 0, CMap::Range, 0},
+    {"Add-RKSJ-V", kAdd_RKSJ_V_1, nullptr, 57, 0, CMap::Range, -1},
+    {"EUC-H", kEUC_H_1, nullptr, 120, 0, CMap::Range, 0},
+    {"EUC-V", kEUC_V_1, nullptr, 27, 0, CMap::Range, -1},
+    {"Ext-RKSJ-H", kExt_RKSJ_H_2, nullptr, 665, 0, CMap::Range, -4},
+    {"Ext-RKSJ-V", kExt_RKSJ_V_2, nullptr, 39, 0, CMap::Range, -1},
+    {"H", kH_1, nullptr, 118, 0, CMap::Range, 0},
+    {"V", kV_1, nullptr, 27, 0, CMap::Range, -1},
+    {"UniJIS-UCS2-H", kUniJIS_UCS2_H_4, nullptr, 9772, 0, CMap::Single, 0},
+    {"UniJIS-UCS2-V", kUniJIS_UCS2_V_4, nullptr, 251, 0, CMap::Single, -1},
+    {"UniJIS-UCS2-HW-H", kUniJIS_UCS2_HW_H_4, nullptr, 4, 0, CMap::Range, -2},
+    {"UniJIS-UCS2-HW-V", kUniJIS_UCS2_HW_V_4, nullptr, 199, 0, CMap::Range, -1},
+    {"UniJIS-UTF16-H", kUniJIS_UCS2_H_4, nullptr, 9772, 0, CMap::Single, 0},
+    {"UniJIS-UTF16-V", kUniJIS_UCS2_V_4, nullptr, 251, 0, CMap::Single, -1},
 };
 
-const size_t kFXCMAP_Japan1_cmaps_size = std::size(kFXCMAP_Japan1_cmaps);
+const size_t kJapan1_cmaps_size = std::size(kJapan1_cmaps);
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Japan1/cmaps_japan1.h b/core/fpdfapi/cmaps/Japan1/cmaps_japan1.h
index 04a9fca..45df22d 100644
--- a/core/fpdfapi/cmaps/Japan1/cmaps_japan1.h
+++ b/core/fpdfapi/cmaps/Japan1/cmaps_japan1.h
@@ -8,32 +8,37 @@
 #define CORE_FPDFAPI_CMAPS_JAPAN1_CMAPS_JAPAN1_H_
 
 #include <stddef.h>
+#include <stdint.h>
 
 #include "core/fpdfapi/cmaps/fpdf_cmaps.h"
 
-extern const uint16_t kFXCMAP_83pv_RKSJ_H_1[];
-extern const uint16_t kFXCMAP_90ms_RKSJ_H_2[];
-extern const uint16_t kFXCMAP_90ms_RKSJ_V_2[];
-extern const uint16_t kFXCMAP_90msp_RKSJ_H_2[];
-extern const uint16_t kFXCMAP_90msp_RKSJ_V_2[];
-extern const uint16_t kFXCMAP_90pv_RKSJ_H_1[];
-extern const uint16_t kFXCMAP_Add_RKSJ_H_1[];
-extern const uint16_t kFXCMAP_Add_RKSJ_V_1[];
-extern const uint16_t kFXCMAP_EUC_H_1[];
-extern const uint16_t kFXCMAP_EUC_V_1[];
-extern const uint16_t kFXCMAP_Ext_RKSJ_H_2[];
-extern const uint16_t kFXCMAP_Ext_RKSJ_V_2[];
-extern const uint16_t kFXCMAP_H_1[];
-extern const uint16_t kFXCMAP_V_1[];
-extern const uint16_t kFXCMAP_UniJIS_UCS2_H_4[];
-extern const uint16_t kFXCMAP_UniJIS_UCS2_V_4[];
-extern const uint16_t kFXCMAP_UniJIS_UCS2_HW_H_4[];
-extern const uint16_t kFXCMAP_UniJIS_UCS2_HW_V_4[];
-extern const uint16_t kFXCMAP_UniJIS_UTF16_H_0[];
-extern const uint16_t kFXCMAP_UniJIS_UTF16_H_0_DWord[];
-extern const uint16_t kFXCMAP_UniJIS_UTF16_V_0[];
-extern const uint16_t kFXCMAP_Japan1CID2Unicode_4[15444];
-extern const FXCMAP_CMap kFXCMAP_Japan1_cmaps[];
-extern const size_t kFXCMAP_Japan1_cmaps_size;
+namespace fxcmap {
+
+extern const uint16_t k83pv_RKSJ_H_1[];
+extern const uint16_t k90ms_RKSJ_H_2[];
+extern const uint16_t k90ms_RKSJ_V_2[];
+extern const uint16_t k90msp_RKSJ_H_2[];
+extern const uint16_t k90msp_RKSJ_V_2[];
+extern const uint16_t k90pv_RKSJ_H_1[];
+extern const uint16_t kAdd_RKSJ_H_1[];
+extern const uint16_t kAdd_RKSJ_V_1[];
+extern const uint16_t kEUC_H_1[];
+extern const uint16_t kEUC_V_1[];
+extern const uint16_t kExt_RKSJ_H_2[];
+extern const uint16_t kExt_RKSJ_V_2[];
+extern const uint16_t kH_1[];
+extern const uint16_t kV_1[];
+extern const uint16_t kUniJIS_UCS2_H_4[];
+extern const uint16_t kUniJIS_UCS2_V_4[];
+extern const uint16_t kUniJIS_UCS2_HW_H_4[];
+extern const uint16_t kUniJIS_UCS2_HW_V_4[];
+extern const uint16_t kUniJIS_UTF16_H_0[];
+extern const uint16_t kUniJIS_UTF16_H_0_DWord[];
+extern const uint16_t kUniJIS_UTF16_V_0[];
+extern const uint16_t kJapan1CID2Unicode_4[15444];
+extern const CMap kJapan1_cmaps[];
+extern const size_t kJapan1_cmaps_size;
+
+}  // namespace fxcmap
 
 #endif  // CORE_FPDFAPI_CMAPS_JAPAN1_CMAPS_JAPAN1_H_
diff --git a/core/fpdfapi/cmaps/Korea1/Adobe-Korea1-UCS2_2.cpp b/core/fpdfapi/cmaps/Korea1/Adobe-Korea1-UCS2_2.cpp
index b23488e..e7657cf 100644
--- a/core/fpdfapi/cmaps/Korea1/Adobe-Korea1-UCS2_2.cpp
+++ b/core/fpdfapi/cmaps/Korea1/Adobe-Korea1-UCS2_2.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Korea1/cmaps_korea1.h"
 
-const uint16_t kFXCMAP_Korea1CID2Unicode_2[18352] = {
+namespace fxcmap {
+
+const uint16_t kKorea1CID2Unicode_2[18352] = {
     0xFFFD, 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
     0x0028, 0x0029, 0x002A, 0x002B, 0x002C, 0x002D, 0x002E, 0x002F, 0x0030,
     0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, 0x0038, 0x0039,
@@ -2048,3 +2050,5 @@
     0x0077, 0x0078, 0x0079, 0x007A, 0x007B, 0x007C, 0x007D, 0x203E, 0x007E,
     0x005C,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Korea1/KSC-EUC-H_0.cpp b/core/fpdfapi/cmaps/Korea1/KSC-EUC-H_0.cpp
index ac0a373..2ba31b4 100644
--- a/core/fpdfapi/cmaps/Korea1/KSC-EUC-H_0.cpp
+++ b/core/fpdfapi/cmaps/Korea1/KSC-EUC-H_0.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Korea1/cmaps_korea1.h"
 
-const uint16_t kFXCMAP_KSC_EUC_H_0[467 * 3] = {
+namespace fxcmap {
+
+const uint16_t kKSC_EUC_H_0[467 * 3] = {
     0x0020, 0x007E, 0x1F9E, 0xA1A1, 0xA1FE, 0x0065, 0xA2A1, 0xA2E5, 0x00C3,
     0xA3A1, 0xA3FE, 0x0108, 0xA4A1, 0xA4D3, 0x0166, 0xA4D5, 0xA4FE, 0x0199,
     0xA5A1, 0xA5AA, 0x01C3, 0xA5B0, 0xA5B9, 0x01CD, 0xA5C1, 0xA5D8, 0x01D7,
@@ -164,3 +166,5 @@
     0xFBA1, 0xFBFE, 0x1E5F, 0xFCA1, 0xFCA8, 0x1EBD, 0xFCA9, 0xFCA9, 0x0EE7,
     0xFCAA, 0xFCFE, 0x1EC5, 0xFDA1, 0xFDFE, 0x1F1A,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Korea1/KSC-EUC-V_0.cpp b/core/fpdfapi/cmaps/Korea1/KSC-EUC-V_0.cpp
index adb1ba6..b166075 100644
--- a/core/fpdfapi/cmaps/Korea1/KSC-EUC-V_0.cpp
+++ b/core/fpdfapi/cmaps/Korea1/KSC-EUC-V_0.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Korea1/cmaps_korea1.h"
 
-const uint16_t kFXCMAP_KSC_EUC_V_0[16 * 3] = {
+namespace fxcmap {
+
+const uint16_t kKSC_EUC_V_0[16 * 3] = {
     0xA1A2, 0xA1A3, 0x1F78, 0xA1A5, 0xA1A5, 0x1F7A, 0xA1A6, 0xA1A6,
     0x2080, 0xA1A9, 0xA1AB, 0x1F7B, 0xA1AD, 0xA1AD, 0x1F7E, 0xA1B2,
     0xA1BD, 0x1F7F, 0xA1EB, 0xA1EB, 0x1F8B, 0xA3A1, 0xA3A1, 0x1F8C,
@@ -14,3 +16,5 @@
     0x1F90, 0xA3BA, 0xA3BF, 0x1F91, 0xA3DB, 0xA3DB, 0x1F97, 0xA3DD,
     0xA3DD, 0x1F98, 0xA3DF, 0xA3DF, 0x1F99, 0xA3FB, 0xA3FE, 0x1F9A,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Korea1/KSCms-UHC-HW-H_1.cpp b/core/fpdfapi/cmaps/Korea1/KSCms-UHC-HW-H_1.cpp
index 1b5c7d0..161198d 100644
--- a/core/fpdfapi/cmaps/Korea1/KSCms-UHC-HW-H_1.cpp
+++ b/core/fpdfapi/cmaps/Korea1/KSCms-UHC-HW-H_1.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Korea1/cmaps_korea1.h"
 
-const uint16_t kFXCMAP_KSCms_UHC_HW_H_1[675 * 3] = {
+namespace fxcmap {
+
+const uint16_t kKSCms_UHC_HW_H_1[675 * 3] = {
     0x0020, 0x007E, 0x1F9E, 0x8141, 0x815A, 0x2475, 0x8161, 0x817A, 0x248F,
     0x8181, 0x81FE, 0x24A9, 0x8241, 0x825A, 0x2527, 0x8261, 0x827A, 0x2541,
     0x8281, 0x82FE, 0x255B, 0x8341, 0x835A, 0x25D9, 0x8361, 0x837A, 0x25F3,
@@ -233,3 +235,5 @@
     0xFAE7, 0xFAFE, 0x1E47, 0xFBA1, 0xFBFE, 0x1E5F, 0xFCA1, 0xFCA8, 0x1EBD,
     0xFCA9, 0xFCA9, 0x0EE7, 0xFCAA, 0xFCFE, 0x1EC5, 0xFDA1, 0xFDFE, 0x1F1A,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Korea1/KSCms-UHC-HW-V_1.cpp b/core/fpdfapi/cmaps/Korea1/KSCms-UHC-HW-V_1.cpp
index f423978..575a27d 100644
--- a/core/fpdfapi/cmaps/Korea1/KSCms-UHC-HW-V_1.cpp
+++ b/core/fpdfapi/cmaps/Korea1/KSCms-UHC-HW-V_1.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Korea1/cmaps_korea1.h"
 
-const uint16_t kFXCMAP_KSCms_UHC_HW_V_1[16 * 3] = {
+namespace fxcmap {
+
+const uint16_t kKSCms_UHC_HW_V_1[16 * 3] = {
     0xA1A2, 0xA1A3, 0x1F78, 0xA1A5, 0xA1A5, 0x1F7A, 0xA1A6, 0xA1A6,
     0x2080, 0xA1A9, 0xA1AB, 0x1F7B, 0xA1AD, 0xA1AD, 0x1F7E, 0xA1B2,
     0xA1BD, 0x1F7F, 0xA1EB, 0xA1EB, 0x1F8B, 0xA3A1, 0xA3A1, 0x1F8C,
@@ -14,3 +16,5 @@
     0x1F90, 0xA3BA, 0xA3BF, 0x1F91, 0xA3DB, 0xA3DB, 0x1F97, 0xA3DD,
     0xA3DD, 0x1F98, 0xA3DF, 0xA3DF, 0x1F99, 0xA3FB, 0xA3FE, 0x1F9A,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Korea1/KSCms-UHC-H_1.cpp b/core/fpdfapi/cmaps/Korea1/KSCms-UHC-H_1.cpp
index b2c83c4..7d855c6 100644
--- a/core/fpdfapi/cmaps/Korea1/KSCms-UHC-H_1.cpp
+++ b/core/fpdfapi/cmaps/Korea1/KSCms-UHC-H_1.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Korea1/cmaps_korea1.h"
 
-const uint16_t kFXCMAP_KSCms_UHC_H_1[675 * 3] = {
+namespace fxcmap {
+
+const uint16_t kKSCms_UHC_H_1[675 * 3] = {
     0x0020, 0x007E, 0x0001, 0x8141, 0x815A, 0x2475, 0x8161, 0x817A, 0x248F,
     0x8181, 0x81FE, 0x24A9, 0x8241, 0x825A, 0x2527, 0x8261, 0x827A, 0x2541,
     0x8281, 0x82FE, 0x255B, 0x8341, 0x835A, 0x25D9, 0x8361, 0x837A, 0x25F3,
@@ -233,3 +235,5 @@
     0xFAE7, 0xFAFE, 0x1E47, 0xFBA1, 0xFBFE, 0x1E5F, 0xFCA1, 0xFCA8, 0x1EBD,
     0xFCA9, 0xFCA9, 0x0EE7, 0xFCAA, 0xFCFE, 0x1EC5, 0xFDA1, 0xFDFE, 0x1F1A,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Korea1/KSCms-UHC-V_1.cpp b/core/fpdfapi/cmaps/Korea1/KSCms-UHC-V_1.cpp
index d09cf5a..7b18417 100644
--- a/core/fpdfapi/cmaps/Korea1/KSCms-UHC-V_1.cpp
+++ b/core/fpdfapi/cmaps/Korea1/KSCms-UHC-V_1.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Korea1/cmaps_korea1.h"
 
-const uint16_t kFXCMAP_KSCms_UHC_V_1[16 * 3] = {
+namespace fxcmap {
+
+const uint16_t kKSCms_UHC_V_1[16 * 3] = {
     0xA1A2, 0xA1A3, 0x1F78, 0xA1A5, 0xA1A5, 0x1F7A, 0xA1A6, 0xA1A6,
     0x2080, 0xA1A9, 0xA1AB, 0x1F7B, 0xA1AD, 0xA1AD, 0x1F7E, 0xA1B2,
     0xA1BD, 0x1F7F, 0xA1EB, 0xA1EB, 0x1F8B, 0xA3A1, 0xA3A1, 0x1F8C,
@@ -14,3 +16,5 @@
     0x1F90, 0xA3BA, 0xA3BF, 0x1F91, 0xA3DB, 0xA3DB, 0x1F97, 0xA3DD,
     0xA3DD, 0x1F98, 0xA3DF, 0xA3DF, 0x1F99, 0xA3FB, 0xA3FE, 0x1F9A,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Korea1/KSCpc-EUC-H_0.cpp b/core/fpdfapi/cmaps/Korea1/KSCpc-EUC-H_0.cpp
index 35ed080..87e8aa5 100644
--- a/core/fpdfapi/cmaps/Korea1/KSCpc-EUC-H_0.cpp
+++ b/core/fpdfapi/cmaps/Korea1/KSCpc-EUC-H_0.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Korea1/cmaps_korea1.h"
 
-const uint16_t kFXCMAP_KSCpc_EUC_H_0[509 * 3] = {
+namespace fxcmap {
+
+const uint16_t kKSCpc_EUC_H_0[509 * 3] = {
     0x0020, 0x007E, 0x0001, 0x0081, 0x0083, 0x0060, 0x00FE, 0x00FF, 0x0063,
     0xA141, 0xA17D, 0x1FFF, 0xA181, 0xA19A, 0x203C, 0xA19C, 0xA1A0, 0x2056,
     0xA1A1, 0xA1A1, 0x0065, 0xA1A2, 0xA1A3, 0x205B, 0xA1A4, 0xA1FE, 0x0068,
@@ -178,3 +180,5 @@
     0xFBA1, 0xFBFE, 0x1E5F, 0xFCA1, 0xFCA8, 0x1EBD, 0xFCA9, 0xFCA9, 0x0EE7,
     0xFCAA, 0xFCFE, 0x1EC5, 0xFDA1, 0xFDFE, 0x1F1A,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Korea1/UniKS-UCS2-H_1.cpp b/core/fpdfapi/cmaps/Korea1/UniKS-UCS2-H_1.cpp
index adac315..0d8d3fc 100644
--- a/core/fpdfapi/cmaps/Korea1/UniKS-UCS2-H_1.cpp
+++ b/core/fpdfapi/cmaps/Korea1/UniKS-UCS2-H_1.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Korea1/cmaps_korea1.h"
 
-const uint16_t kFXCMAP_UniKS_UCS2_H_1[8394 * 3] = {
+namespace fxcmap {
+
+const uint16_t kUniKS_UCS2_H_1[8394 * 3] = {
     0x0020, 0x007E, 0x0001, 0x00A1, 0x00A1, 0x00D0, 0x00A4, 0x00A4, 0x00D6,
     0x00A7, 0x00A7, 0x009B, 0x00A8, 0x00A8, 0x006B, 0x00AA, 0x00AA, 0x029C,
     0x00AB, 0x00AB, 0x00B0, 0x00B0, 0x00B0, 0x008A, 0x00B1, 0x00B1, 0x0082,
@@ -2806,3 +2808,5 @@
     0xFF5E, 0xFF5E, 0x0071, 0xFFE0, 0xFFE1, 0x008F, 0xFFE2, 0xFFE2, 0x00C2,
     0xFFE3, 0xFFE3, 0x0165, 0xFFE5, 0xFFE5, 0x0091, 0xFFE6, 0xFFE6, 0x0143,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Korea1/UniKS-UCS2-V_1.cpp b/core/fpdfapi/cmaps/Korea1/UniKS-UCS2-V_1.cpp
index 0eb93d8..a550b17 100644
--- a/core/fpdfapi/cmaps/Korea1/UniKS-UCS2-V_1.cpp
+++ b/core/fpdfapi/cmaps/Korea1/UniKS-UCS2-V_1.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Korea1/cmaps_korea1.h"
 
-const uint16_t kFXCMAP_UniKS_UCS2_V_1[18 * 3] = {
+namespace fxcmap {
+
+const uint16_t kUniKS_UCS2_V_1[18 * 3] = {
     0x2013, 0x2014, 0x1F7B, 0x2016, 0x2016, 0x1F7D, 0x2025, 0x2025, 0x1F7A,
     0x3001, 0x3002, 0x1F78, 0x3008, 0x3011, 0x1F81, 0x3013, 0x3013, 0x1F8B,
     0x3014, 0x3015, 0x1F7F, 0xFF01, 0xFF01, 0x1F8C, 0xFF08, 0xFF09, 0x1F8D,
@@ -14,3 +16,5 @@
     0xFF3B, 0xFF3B, 0x1F97, 0xFF3D, 0xFF3D, 0x1F98, 0xFF3F, 0xFF3F, 0x1F99,
     0xFF5B, 0xFF5D, 0x1F9A, 0xFF5E, 0xFF5E, 0x1F7E, 0xFFE3, 0xFFE3, 0x1F9D,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Korea1/UniKS-UTF16-H_0.cpp b/core/fpdfapi/cmaps/Korea1/UniKS-UTF16-H_0.cpp
index f8859bd..2d42617 100644
--- a/core/fpdfapi/cmaps/Korea1/UniKS-UTF16-H_0.cpp
+++ b/core/fpdfapi/cmaps/Korea1/UniKS-UTF16-H_0.cpp
@@ -6,7 +6,9 @@
 
 #include "core/fpdfapi/cmaps/Korea1/cmaps_korea1.h"
 
-const uint16_t kFXCMAP_UniKS_UTF16_H_0[158 * 2] = {
+namespace fxcmap {
+
+const uint16_t kUniKS_UTF16_H_0[158 * 2] = {
     0x00A9, 0x0062, 0x2010, 0x0061, 0x20A9, 0x0060, 0x2F00, 0x193C, 0x2F04,
     0x18EC, 0x2F06, 0x190D, 0x2F08, 0x192B, 0x2F0A, 0x194D, 0x2F0B, 0x1D4B,
     0x2F11, 0x10AE, 0x2F12, 0x116A, 0x2F14, 0x143F, 0x2F17, 0x168C, 0x2F18,
@@ -44,3 +46,5 @@
     0x2FD0, 0x1466, 0x2FD1, 0x1A7D, 0x2FD2, 0x1CBF, 0x2FD3, 0x11D3, 0x2FD4,
     0x0F6A,
 };
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Korea1/cmaps_korea1.cpp b/core/fpdfapi/cmaps/Korea1/cmaps_korea1.cpp
index 513a818..d59c60e 100644
--- a/core/fpdfapi/cmaps/Korea1/cmaps_korea1.cpp
+++ b/core/fpdfapi/cmaps/Korea1/cmaps_korea1.cpp
@@ -8,27 +8,22 @@
 
 #include <iterator>
 
-const FXCMAP_CMap kFXCMAP_Korea1_cmaps[] = {
-    {"KSC-EUC-H", kFXCMAP_KSC_EUC_H_0, nullptr, 467, 0, FXCMAP_CMap::Range, 0},
-    {"KSC-EUC-V", kFXCMAP_KSC_EUC_V_0, nullptr, 16, 0, FXCMAP_CMap::Range, -1},
-    {"KSCms-UHC-H", kFXCMAP_KSCms_UHC_H_1, nullptr, 675, 0, FXCMAP_CMap::Range,
-     -2},
-    {"KSCms-UHC-V", kFXCMAP_KSCms_UHC_V_1, nullptr, 16, 0, FXCMAP_CMap::Range,
-     -1},
-    {"KSCms-UHC-HW-H", kFXCMAP_KSCms_UHC_HW_H_1, nullptr, 675, 0,
-     FXCMAP_CMap::Range, 0},
-    {"KSCms-UHC-HW-V", kFXCMAP_KSCms_UHC_HW_V_1, nullptr, 16, 0,
-     FXCMAP_CMap::Range, -1},
-    {"KSCpc-EUC-H", kFXCMAP_KSCpc_EUC_H_0, nullptr, 509, 0, FXCMAP_CMap::Range,
-     -6},
-    {"UniKS-UCS2-H", kFXCMAP_UniKS_UCS2_H_1, nullptr, 8394, 0,
-     FXCMAP_CMap::Range, 0},
-    {"UniKS-UCS2-V", kFXCMAP_UniKS_UCS2_V_1, nullptr, 18, 0, FXCMAP_CMap::Range,
-     -1},
-    {"UniKS-UTF16-H", kFXCMAP_UniKS_UTF16_H_0, nullptr, 158, 0,
-     FXCMAP_CMap::Single, -2},
-    {"UniKS-UTF16-V", kFXCMAP_UniKS_UCS2_V_1, nullptr, 18, 0,
-     FXCMAP_CMap::Range, -1},
+namespace fxcmap {
+
+const CMap kKorea1_cmaps[] = {
+    {"KSC-EUC-H", kKSC_EUC_H_0, nullptr, 467, 0, CMap::Range, 0},
+    {"KSC-EUC-V", kKSC_EUC_V_0, nullptr, 16, 0, CMap::Range, -1},
+    {"KSCms-UHC-H", kKSCms_UHC_H_1, nullptr, 675, 0, CMap::Range, -2},
+    {"KSCms-UHC-V", kKSCms_UHC_V_1, nullptr, 16, 0, CMap::Range, -1},
+    {"KSCms-UHC-HW-H", kKSCms_UHC_HW_H_1, nullptr, 675, 0, CMap::Range, 0},
+    {"KSCms-UHC-HW-V", kKSCms_UHC_HW_V_1, nullptr, 16, 0, CMap::Range, -1},
+    {"KSCpc-EUC-H", kKSCpc_EUC_H_0, nullptr, 509, 0, CMap::Range, -6},
+    {"UniKS-UCS2-H", kUniKS_UCS2_H_1, nullptr, 8394, 0, CMap::Range, 0},
+    {"UniKS-UCS2-V", kUniKS_UCS2_V_1, nullptr, 18, 0, CMap::Range, -1},
+    {"UniKS-UTF16-H", kUniKS_UTF16_H_0, nullptr, 158, 0, CMap::Single, -2},
+    {"UniKS-UTF16-V", kUniKS_UCS2_V_1, nullptr, 18, 0, CMap::Range, -1},
 };
 
-const size_t kFXCMAP_Korea1_cmaps_size = std::size(kFXCMAP_Korea1_cmaps);
+const size_t kKorea1_cmaps_size = std::size(kKorea1_cmaps);
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/Korea1/cmaps_korea1.h b/core/fpdfapi/cmaps/Korea1/cmaps_korea1.h
index 3331b4e..f75ded9 100644
--- a/core/fpdfapi/cmaps/Korea1/cmaps_korea1.h
+++ b/core/fpdfapi/cmaps/Korea1/cmaps_korea1.h
@@ -8,21 +8,26 @@
 #define CORE_FPDFAPI_CMAPS_KOREA1_CMAPS_KOREA1_H_
 
 #include <stddef.h>
+#include <stdint.h>
 
 #include "core/fpdfapi/cmaps/fpdf_cmaps.h"
 
-extern const uint16_t kFXCMAP_KSC_EUC_H_0[];
-extern const uint16_t kFXCMAP_KSC_EUC_V_0[];
-extern const uint16_t kFXCMAP_KSCms_UHC_H_1[];
-extern const uint16_t kFXCMAP_KSCms_UHC_V_1[];
-extern const uint16_t kFXCMAP_KSCms_UHC_HW_H_1[];
-extern const uint16_t kFXCMAP_KSCms_UHC_HW_V_1[];
-extern const uint16_t kFXCMAP_KSCpc_EUC_H_0[];
-extern const uint16_t kFXCMAP_UniKS_UCS2_H_1[];
-extern const uint16_t kFXCMAP_UniKS_UCS2_V_1[];
-extern const uint16_t kFXCMAP_UniKS_UTF16_H_0[];
-extern const uint16_t kFXCMAP_Korea1CID2Unicode_2[18352];
-extern const FXCMAP_CMap kFXCMAP_Korea1_cmaps[];
-extern const size_t kFXCMAP_Korea1_cmaps_size;
+namespace fxcmap {
+
+extern const uint16_t kKSC_EUC_H_0[];
+extern const uint16_t kKSC_EUC_V_0[];
+extern const uint16_t kKSCms_UHC_H_1[];
+extern const uint16_t kKSCms_UHC_V_1[];
+extern const uint16_t kKSCms_UHC_HW_H_1[];
+extern const uint16_t kKSCms_UHC_HW_V_1[];
+extern const uint16_t kKSCpc_EUC_H_0[];
+extern const uint16_t kUniKS_UCS2_H_1[];
+extern const uint16_t kUniKS_UCS2_V_1[];
+extern const uint16_t kUniKS_UTF16_H_0[];
+extern const uint16_t kKorea1CID2Unicode_2[18352];
+extern const CMap kKorea1_cmaps[];
+extern const size_t kKorea1_cmaps_size;
+
+}  // namespace fxcmap
 
 #endif  // CORE_FPDFAPI_CMAPS_KOREA1_CMAPS_KOREA1_H_
diff --git a/core/fpdfapi/cmaps/fpdf_cmaps.cpp b/core/fpdfapi/cmaps/fpdf_cmaps.cpp
index 89f9a91..e0cb0b5 100644
--- a/core/fpdfapi/cmaps/fpdf_cmaps.cpp
+++ b/core/fpdfapi/cmaps/fpdf_cmaps.cpp
@@ -11,6 +11,8 @@
 #include "third_party/base/check.h"
 #include "third_party/base/notreached.h"
 
+namespace fxcmap {
+
 namespace {
 
 struct SingleCmap {
@@ -24,23 +26,23 @@
   uint16_t cid;
 };
 
-const FXCMAP_CMap* FindNextCMap(const FXCMAP_CMap* pMap) {
+const CMap* FindNextCMap(const CMap* pMap) {
   return pMap->m_UseOffset ? pMap + pMap->m_UseOffset : nullptr;
 }
 
 }  // namespace
 
-uint16_t CIDFromCharCode(const FXCMAP_CMap* pMap, uint32_t charcode) {
+uint16_t CIDFromCharCode(const CMap* pMap, uint32_t charcode) {
   DCHECK(pMap);
   const uint16_t loword = static_cast<uint16_t>(charcode);
   if (charcode >> 16) {
     while (pMap) {
       if (pMap->m_pDWordMap) {
-        const FXCMAP_DWordCIDMap* begin = pMap->m_pDWordMap;
+        const DWordCIDMap* begin = pMap->m_pDWordMap;
         const auto* end = begin + pMap->m_DWordCount;
         const auto* found = std::lower_bound(
             begin, end, charcode,
-            [](const FXCMAP_DWordCIDMap& element, uint32_t charcode) {
+            [](const DWordCIDMap& element, uint32_t charcode) {
               uint16_t hiword = static_cast<uint16_t>(charcode >> 16);
               if (element.m_HiWord != hiword)
                 return element.m_HiWord < hiword;
@@ -58,7 +60,7 @@
 
   while (pMap && pMap->m_pWordMap) {
     switch (pMap->m_WordMapType) {
-      case FXCMAP_CMap::Single: {
+      case CMap::Single: {
         const auto* begin =
             reinterpret_cast<const SingleCmap*>(pMap->m_pWordMap);
         const auto* end = begin + pMap->m_WordCount;
@@ -70,7 +72,7 @@
           return found->cid;
         break;
       }
-      case FXCMAP_CMap::Range: {
+      case CMap::Range: {
         const auto* begin =
             reinterpret_cast<const RangeCmap*>(pMap->m_pWordMap);
         const auto* end = begin + pMap->m_WordCount;
@@ -93,7 +95,7 @@
   return 0;
 }
 
-uint32_t CharCodeFromCID(const FXCMAP_CMap* pMap, uint16_t cid) {
+uint32_t CharCodeFromCID(const CMap* pMap, uint16_t cid) {
   // TODO(dsinclair): This should be checking both pMap->m_WordMap and
   // pMap->m_DWordMap. There was a second while() but it was never reached as
   // the first always returns. Investigate and determine how this should
@@ -102,7 +104,7 @@
   DCHECK(pMap);
   while (pMap) {
     switch (pMap->m_WordMapType) {
-      case FXCMAP_CMap::Single: {
+      case CMap::Single: {
         const auto* pCur =
             reinterpret_cast<const SingleCmap*>(pMap->m_pWordMap);
         const auto* pEnd = pCur + pMap->m_WordCount;
@@ -113,7 +115,7 @@
         }
         break;
       }
-      case FXCMAP_CMap::Range: {
+      case CMap::Range: {
         const auto* pCur = reinterpret_cast<const RangeCmap*>(pMap->m_pWordMap);
         const auto* pEnd = pCur + pMap->m_WordCount;
         while (pCur < pEnd) {
@@ -132,3 +134,5 @@
   }
   return 0;
 }
+
+}  // namespace fxcmap
diff --git a/core/fpdfapi/cmaps/fpdf_cmaps.h b/core/fpdfapi/cmaps/fpdf_cmaps.h
index 9d652f1..0881bd1 100644
--- a/core/fpdfapi/cmaps/fpdf_cmaps.h
+++ b/core/fpdfapi/cmaps/fpdf_cmaps.h
@@ -9,26 +9,30 @@
 
 #include <stdint.h>
 
-struct FXCMAP_DWordCIDMap {
+namespace fxcmap {
+
+struct DWordCIDMap {
   uint16_t m_HiWord;
   uint16_t m_LoWordLow;
   uint16_t m_LoWordHigh;
   uint16_t m_CID;
 };
 
-struct FXCMAP_CMap {
+struct CMap {
   enum MapType : uint8_t { Single, Range };
 
-  const char* m_Name;                     // Raw, POD struct.
-  const uint16_t* m_pWordMap;             // Raw, POD struct.
-  const FXCMAP_DWordCIDMap* m_pDWordMap;  // Raw, POD struct.
+  const char* m_Name;              // Raw, POD struct.
+  const uint16_t* m_pWordMap;      // Raw, POD struct.
+  const DWordCIDMap* m_pDWordMap;  // Raw, POD struct.
   uint16_t m_WordCount;
   uint16_t m_DWordCount;
   MapType m_WordMapType;
   int8_t m_UseOffset;
 };
 
-uint16_t CIDFromCharCode(const FXCMAP_CMap* pMap, uint32_t charcode);
-uint32_t CharCodeFromCID(const FXCMAP_CMap* pMap, uint16_t cid);
+uint16_t CIDFromCharCode(const CMap* pMap, uint32_t charcode);
+uint32_t CharCodeFromCID(const CMap* pMap, uint16_t cid);
+
+}  // namespace fxcmap
 
 #endif  // CORE_FPDFAPI_CMAPS_FPDF_CMAPS_H_
diff --git a/core/fpdfapi/font/cpdf_cidfont.cpp b/core/fpdfapi/font/cpdf_cidfont.cpp
index f4154b7..6e0e665 100644
--- a/core/fpdfapi/font/cpdf_cidfont.cpp
+++ b/core/fpdfapi/font/cpdf_cidfont.cpp
@@ -159,13 +159,13 @@
   }
 }
 
-wchar_t EmbeddedUnicodeFromCharcode(const FXCMAP_CMap* pEmbedMap,
+wchar_t EmbeddedUnicodeFromCharcode(const fxcmap::CMap* pEmbedMap,
                                     CIDSet charset,
                                     uint32_t charcode) {
   if (!IsValidEmbeddedCharcodeFromUnicodeCharset(charset))
     return 0;
 
-  uint16_t cid = CIDFromCharCode(pEmbedMap, charcode);
+  uint16_t cid = fxcmap::CIDFromCharCode(pEmbedMap, charcode);
   if (!cid)
     return 0;
 
@@ -174,7 +174,7 @@
   return cid < map.size() ? map[cid] : 0;
 }
 
-uint32_t EmbeddedCharcodeFromUnicode(const FXCMAP_CMap* pEmbedMap,
+uint32_t EmbeddedCharcodeFromUnicode(const fxcmap::CMap* pEmbedMap,
                                      CIDSet charset,
                                      wchar_t unicode) {
   if (!IsValidEmbeddedCharcodeFromUnicodeCharset(charset))
@@ -184,7 +184,7 @@
       CPDF_FontGlobals::GetInstance()->GetEmbeddedToUnicode(charset);
   for (uint32_t i = 0; i < map.size(); ++i) {
     if (map[i] == unicode) {
-      uint32_t charCode = CharCodeFromCID(pEmbedMap, i);
+      uint32_t charCode = fxcmap::CharCodeFromCID(pEmbedMap, i);
       if (charCode)
         return charCode;
     }
diff --git a/core/fpdfapi/font/cpdf_cmap.cpp b/core/fpdfapi/font/cpdf_cmap.cpp
index e957992..d5fa61b 100644
--- a/core/fpdfapi/font/cpdf_cmap.cpp
+++ b/core/fpdfapi/font/cpdf_cmap.cpp
@@ -280,8 +280,8 @@
   return 1;
 }
 
-const FXCMAP_CMap* FindEmbeddedCMap(pdfium::span<const FXCMAP_CMap> pCMaps,
-                                    ByteStringView bsName) {
+const fxcmap::CMap* FindEmbeddedCMap(pdfium::span<const fxcmap::CMap> pCMaps,
+                                     ByteStringView bsName) {
   for (size_t i = 0; i < pCMaps.size(); i++) {
     if (bsName == pCMaps[i].m_Name)
       return &pCMaps[i];
@@ -337,7 +337,7 @@
     return static_cast<uint16_t>(charcode);
 
   if (m_pEmbedMap)
-    return ::CIDFromCharCode(m_pEmbedMap, charcode);
+    return fxcmap::CIDFromCharCode(m_pEmbedMap, charcode);
 
   if (m_DirectCharcodeToCIDTable.empty())
     return static_cast<uint16_t>(charcode);
diff --git a/core/fpdfapi/font/cpdf_cmap.h b/core/fpdfapi/font/cpdf_cmap.h
index 8ce745c..cc186e8 100644
--- a/core/fpdfapi/font/cpdf_cmap.h
+++ b/core/fpdfapi/font/cpdf_cmap.h
@@ -17,7 +17,9 @@
 #include "core/fxcrt/unowned_ptr.h"
 #include "third_party/base/span.h"
 
-struct FXCMAP_CMap;
+namespace fxcmap {
+struct CMap;
+}
 
 enum class CIDCoding : uint8_t {
   kUNKNOWN = 0,
@@ -71,7 +73,7 @@
   void SetMixedFourByteLeadingRanges(std::vector<CodeRange> ranges);
 
   CIDCoding GetCoding() const { return m_Coding; }
-  const FXCMAP_CMap* GetEmbedMap() const { return m_pEmbedMap; }
+  const fxcmap::CMap* GetEmbedMap() const { return m_pEmbedMap; }
   CIDSet GetCharset() const { return m_Charset; }
   void SetCharset(CIDSet set) { m_Charset = set; }
 
@@ -96,7 +98,7 @@
   std::vector<CodeRange> m_MixedFourByteLeadingRanges;
   FixedZeroedDataVector<uint16_t> m_DirectCharcodeToCIDTable;
   std::vector<CIDRange> m_AdditionalCharcodeToCIDMappings;
-  UnownedPtr<const FXCMAP_CMap> m_pEmbedMap;
+  UnownedPtr<const fxcmap::CMap> m_pEmbedMap;
 };
 
 #endif  // CORE_FPDFAPI_FONT_CPDF_CMAP_H_
diff --git a/core/fpdfapi/font/cpdf_fontglobals.cpp b/core/fpdfapi/font/cpdf_fontglobals.cpp
index dc29806..1aa19d6 100644
--- a/core/fpdfapi/font/cpdf_fontglobals.cpp
+++ b/core/fpdfapi/font/cpdf_fontglobals.cpp
@@ -92,29 +92,29 @@
 }
 
 void CPDF_FontGlobals::LoadEmbeddedGB1CMaps() {
-  SetEmbeddedCharset(
-      CIDSET_GB1, pdfium::make_span(kFXCMAP_GB1_cmaps, kFXCMAP_GB1_cmaps_size));
-  SetEmbeddedToUnicode(CIDSET_GB1, kFXCMAP_GB1CID2Unicode_5);
+  SetEmbeddedCharset(CIDSET_GB1, pdfium::make_span(fxcmap::kGB1_cmaps,
+                                                   fxcmap::kGB1_cmaps_size));
+  SetEmbeddedToUnicode(CIDSET_GB1, fxcmap::kGB1CID2Unicode_5);
 }
 
 void CPDF_FontGlobals::LoadEmbeddedCNS1CMaps() {
-  SetEmbeddedCharset(CIDSET_CNS1, pdfium::make_span(kFXCMAP_CNS1_cmaps,
-                                                    kFXCMAP_CNS1_cmaps_size));
-  SetEmbeddedToUnicode(CIDSET_CNS1, kFXCMAP_CNS1CID2Unicode_5);
+  SetEmbeddedCharset(CIDSET_CNS1, pdfium::make_span(fxcmap::kCNS1_cmaps,
+                                                    fxcmap::kCNS1_cmaps_size));
+  SetEmbeddedToUnicode(CIDSET_CNS1, fxcmap::kCNS1CID2Unicode_5);
 }
 
 void CPDF_FontGlobals::LoadEmbeddedJapan1CMaps() {
   SetEmbeddedCharset(
       CIDSET_JAPAN1,
-      pdfium::make_span(kFXCMAP_Japan1_cmaps, kFXCMAP_Japan1_cmaps_size));
-  SetEmbeddedToUnicode(CIDSET_JAPAN1, kFXCMAP_Japan1CID2Unicode_4);
+      pdfium::make_span(fxcmap::kJapan1_cmaps, fxcmap::kJapan1_cmaps_size));
+  SetEmbeddedToUnicode(CIDSET_JAPAN1, fxcmap::kJapan1CID2Unicode_4);
 }
 
 void CPDF_FontGlobals::LoadEmbeddedKorea1CMaps() {
   SetEmbeddedCharset(
       CIDSET_KOREA1,
-      pdfium::make_span(kFXCMAP_Korea1_cmaps, kFXCMAP_Korea1_cmaps_size));
-  SetEmbeddedToUnicode(CIDSET_KOREA1, kFXCMAP_Korea1CID2Unicode_2);
+      pdfium::make_span(fxcmap::kKorea1_cmaps, fxcmap::kKorea1_cmaps_size));
+  SetEmbeddedToUnicode(CIDSET_KOREA1, fxcmap::kKorea1CID2Unicode_2);
 }
 
 RetainPtr<const CPDF_CMap> CPDF_FontGlobals::GetPredefinedCMap(
diff --git a/core/fpdfapi/font/cpdf_fontglobals.h b/core/fpdfapi/font/cpdf_fontglobals.h
index a1379a0..6b2e3bc 100644
--- a/core/fpdfapi/font/cpdf_fontglobals.h
+++ b/core/fpdfapi/font/cpdf_fontglobals.h
@@ -37,10 +37,10 @@
            CFX_FontMapper::StandardFont index,
            RetainPtr<CPDF_Font> pFont);
 
-  void SetEmbeddedCharset(CIDSet idx, pdfium::span<const FXCMAP_CMap> map) {
+  void SetEmbeddedCharset(CIDSet idx, pdfium::span<const fxcmap::CMap> map) {
     m_EmbeddedCharsets[idx] = map;
   }
-  pdfium::span<const FXCMAP_CMap> GetEmbeddedCharset(CIDSet idx) const {
+  pdfium::span<const fxcmap::CMap> GetEmbeddedCharset(CIDSet idx) const {
     return m_EmbeddedCharsets[idx];
   }
   void SetEmbeddedToUnicode(CIDSet idx, pdfium::span<const uint16_t> map) {
@@ -64,7 +64,7 @@
 
   std::map<ByteString, RetainPtr<const CPDF_CMap>> m_CMaps;
   std::unique_ptr<CPDF_CID2UnicodeMap> m_CID2UnicodeMaps[CIDSET_NUM_SETS];
-  pdfium::span<const FXCMAP_CMap> m_EmbeddedCharsets[CIDSET_NUM_SETS];
+  pdfium::span<const fxcmap::CMap> m_EmbeddedCharsets[CIDSET_NUM_SETS];
   pdfium::span<const uint16_t> m_EmbeddedToUnicodes[CIDSET_NUM_SETS];
   std::map<UnownedPtr<CPDF_Document>,
            std::unique_ptr<CFX_StockFontArray>,