Rename some functions that start with underscore.

core/src/fxcodec/lgif/fx_gif.h

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #ifndef CORE_SRC_FXCODEC_LGIF_FX_GIF_H_
 #define CORE_SRC_FXCODEC_LGIF_FX_GIF_H_
 
 #include <setjmp.h>
 
 #include "core/include/fxcrt/fx_basic.h"
 
-extern FX_WORD _GetWord_LSBFirst(uint8_t* p);
-extern void _SetWord_LSBFirst(uint8_t* p, FX_WORD v);
-extern void _BpcConvert(const uint8_t* src_buf,
-                        FX_DWORD src_len,
-                        int32_t src_bpc,
-                        int32_t dst_bpc,
-                        uint8_t*& dst_buf,
-                        FX_DWORD& dst_len);
-#define GIF_SUPPORT_COMMENT_EXTENSION
-#define GIF_SUPPORT_GRAPHIC_CONTROL_EXTENSION
-#define GIF_SUPPORT_PLAIN_TEXT_EXTENSION
 #define GIF_SIGNATURE "GIF"
 #define GIF_SIG_EXTENSION 0x21
 #define GIF_SIG_IMAGE 0x2C
 #define GIF_SIG_TRAILER 0x3B
 #define GIF_BLOCK_GCE 0xF9
 #define GIF_BLOCK_PTE 0x01
 #define GIF_BLOCK_CE 0xFE
 #define GIF_BLOCK_AE 0xFF
 #define GIF_BLOCK_TERMINAL 0x00
 #define GIF_MAX_LZW_CODE 4096
@@ skipping 166 matching lines @@
   uint8_t bit_offset;
   uint8_t index_bit_cur;
   uint8_t index_buf[GIF_DATA_BLOCK];
   uint8_t index_buf_len;
   tag_Table code_table[GIF_MAX_LZW_CODE];
   FX_WORD table_cur;
 };
 typedef struct tag_gif_decompress_struct gif_decompress_struct;
 typedef gif_decompress_struct* gif_decompress_struct_p;
 typedef gif_decompress_struct_p* gif_decompress_struct_pp;
-static int32_t s_gif_interlace_step[4] = {8, 8, 4, 2};
+static const int32_t s_gif_interlace_step[4] = {8, 8, 4, 2};
 struct tag_gif_decompress_struct {
   jmp_buf jmpbuf;
   FX_CHAR* err_ptr;
-  void (*_gif_error_fn)(gif_decompress_struct_p gif_ptr,
-                        const FX_CHAR* err_msg);
+  void (*gif_error_fn)(gif_decompress_struct_p gif_ptr, const FX_CHAR* err_msg);
   void* context_ptr;
   int width;
   int height;
   GifPalette* global_pal_ptr;
   int32_t global_pal_num;
   uint8_t global_sort_flag;
   uint8_t global_color_resolution;
 
   uint8_t bc_index;
   uint8_t pixel_aspect;
   CGifLZWDecoder* img_decoder_ptr;
   FX_DWORD img_row_offset;
   FX_DWORD img_row_avail_size;
   uint8_t img_pass_num;
   CFX_ArrayTemplate<GifImage*>* img_ptr_arr_ptr;
-  uint8_t* (*_gif_ask_buf_for_pal_fn)(gif_decompress_struct_p gif_ptr,
-                                      int32_t pal_size);
+  uint8_t* (*gif_ask_buf_for_pal_fn)(gif_decompress_struct_p gif_ptr,
+                                     int32_t pal_size);
   uint8_t* next_in;
   FX_DWORD avail_in;
   int32_t decode_status;
   FX_DWORD skip_size;
-  void (*_gif_record_current_position_fn)(gif_decompress_struct_p gif_ptr,
-                                          FX_DWORD* cur_pos_ptr);
-  void (*_gif_get_row_fn)(gif_decompress_struct_p gif_ptr,
-                          int32_t row_num,
-                          uint8_t* row_buf);
-  FX_BOOL (*_gif_get_record_position_fn)(gif_decompress_struct_p gif_ptr,
+  void (*gif_record_current_position_fn)(gif_decompress_struct_p gif_ptr,
+                                         FX_DWORD* cur_pos_ptr);
+  void (*gif_get_row_fn)(gif_decompress_struct_p gif_ptr,
+                         int32_t row_num,
+                         uint8_t* row_buf);
+  FX_BOOL (*gif_get_record_position_fn)(gif_decompress_struct_p gif_ptr,
             FX_DWORD cur_pos,
             int32_t left, int32_t top, int32_t width, int32_t height,
             int32_t pal_num, void* pal_ptr,
             int32_t delay_time, FX_BOOL user_input,
             int32_t trans_index, int32_t disposal_method, FX_BOOL interlace);
-#ifdef GIF_SUPPORT_APPLICATION_EXTENSION
-  uint8_t app_identify[8];
-  uint8_t app_authentication[3];
-  FX_DWORD app_data_size;
-  uint8_t* app_data;
-#endif
-#ifdef GIF_SUPPORT_COMMENT_EXTENSION
   CFX_ByteString* cmt_data_ptr;
-#endif
-#ifdef GIF_SUPPORT_GRAPHIC_CONTROL_EXTENSION
   GifGCE* gce_ptr;
-#endif
-#ifdef GIF_SUPPORT_PLAIN_TEXT_EXTENSION
   CFX_ArrayTemplate<GifPlainText*>* pt_ptr_arr_ptr;
-#endif
 };
 typedef struct tag_gif_compress_struct gif_compress_struct;
 typedef gif_compress_struct* gif_compress_struct_p;
 typedef gif_compress_struct_p* gif_compress_struct_pp;
 struct tag_gif_compress_struct {
   const uint8_t* src_buf;
   FX_DWORD src_pitch;
   FX_DWORD src_width;
   FX_DWORD src_row;
   FX_DWORD cur_offset;
   FX_DWORD frames;
   GifHeader* header_ptr;
   GifLSD* lsd_ptr;
   GifPalette* global_pal;
   FX_WORD gpal_num;
   GifPalette* local_pal;
   FX_WORD lpal_num;
   GifImageInfo* image_info_ptr;
   CGifLZWEncoder* img_encoder_ptr;
-#ifdef GIF_SUPPORT_APPLICATION_EXTENSION
-  uint8_t app_identify[8];
-  uint8_t app_authentication[3];
-  FX_DWORD app_data_size;
-  uint8_t* app_data;
-#endif
 
-#ifdef GIF_SUPPORT_COMMENT_EXTENSION
   uint8_t* cmt_data_ptr;
   FX_DWORD cmt_data_len;
-#endif
-
-#ifdef GIF_SUPPORT_GRAPHIC_CONTROL_EXTENSION
   GifGCE* gce_ptr;
-#endif
-
-#ifdef GIF_SUPPORT_PLAIN_TEXT_EXTENSION
   GifPTE* pte_ptr;
   const uint8_t* pte_data_ptr;
   FX_DWORD pte_data_len;
-#endif
 };
 
-void _gif_error(gif_decompress_struct_p gif_ptr, const FX_CHAR* err_msg);
-void _gif_warn(gif_decompress_struct_p gif_ptr, const FX_CHAR* err_msg);
-gif_decompress_struct_p _gif_create_decompress();
-void _gif_destroy_decompress(gif_decompress_struct_pp gif_ptr_ptr);
-gif_compress_struct_p _gif_create_compress();
-void _gif_destroy_compress(gif_compress_struct_pp gif_ptr_ptr);
-int32_t _gif_read_header(gif_decompress_struct_p gif_ptr);
-int32_t _gif_get_frame(gif_decompress_struct_p gif_ptr);
-int32_t _gif_get_frame_num(gif_decompress_struct_p gif_ptr);
-int32_t _gif_decode_extension(gif_decompress_struct_p gif_ptr);
-int32_t _gif_decode_image_info(gif_decompress_struct_p gif_ptr);
-void _gif_takeover_gce_ptr(gif_decompress_struct_p gif_ptr,
-                           GifGCE** gce_ptr_ptr);
-int32_t _gif_load_frame(gif_decompress_struct_p gif_ptr, int32_t frame_num);
-uint8_t* _gif_read_data(gif_decompress_struct_p gif_ptr,
-                        uint8_t** des_buf_pp,
-                        FX_DWORD data_size);
-void _gif_save_decoding_status(gif_decompress_struct_p gif_ptr, int32_t status);
-void _gif_input_buffer(gif_decompress_struct_p gif_ptr,
-                       uint8_t* src_buf,
-                       FX_DWORD src_size);
-FX_DWORD _gif_get_avail_input(gif_decompress_struct_p gif_ptr,
-                              uint8_t** avial_buf_ptr);
+void gif_error(gif_decompress_struct_p gif_ptr, const FX_CHAR* err_msg);
+void gif_warn(gif_decompress_struct_p gif_ptr, const FX_CHAR* err_msg);
+gif_decompress_struct_p gif_create_decompress();
+void gif_destroy_decompress(gif_decompress_struct_pp gif_ptr_ptr);
+gif_compress_struct_p gif_create_compress();
+void gif_destroy_compress(gif_compress_struct_pp gif_ptr_ptr);
+int32_t gif_read_header(gif_decompress_struct_p gif_ptr);
+int32_t gif_get_frame(gif_decompress_struct_p gif_ptr);
+int32_t gif_get_frame_num(gif_decompress_struct_p gif_ptr);
+int32_t gif_decode_extension(gif_decompress_struct_p gif_ptr);
+int32_t gif_decode_image_info(gif_decompress_struct_p gif_ptr);
+void gif_takeover_gce_ptr(gif_decompress_struct_p gif_ptr,
+                          GifGCE** gce_ptr_ptr);
+int32_t gif_load_frame(gif_decompress_struct_p gif_ptr, int32_t frame_num);
+uint8_t* gif_read_data(gif_decompress_struct_p gif_ptr,
+                       uint8_t** des_buf_pp,
+                       FX_DWORD data_size);
+void gif_save_decoding_status(gif_decompress_struct_p gif_ptr, int32_t status);
+void gif_input_buffer(gif_decompress_struct_p gif_ptr,
+                      uint8_t* src_buf,
+                      FX_DWORD src_size);
+FX_DWORD gif_get_avail_input(gif_decompress_struct_p gif_ptr,
+                             uint8_t** avial_buf_ptr);
 void interlace_buf(const uint8_t* buf, FX_DWORD width, FX_DWORD height);
-FX_BOOL _gif_encode(gif_compress_struct_p gif_ptr,
-                    uint8_t*& dst_buf,
-                    FX_DWORD& dst_len);
+FX_BOOL gif_encode(gif_compress_struct_p gif_ptr,
+                   uint8_t*& dst_buf,
+                   FX_DWORD& dst_len);
 
 #endif  // CORE_SRC_FXCODEC_LGIF_FX_GIF_H_