Rename some functions that start with underscore.

core/src/fxcodec/lgif/fx_gif.h

Index: core/src/fxcodec/lgif/fx_gif.h
diff --git a/core/src/fxcodec/lgif/fx_gif.h b/core/src/fxcodec/lgif/fx_gif.h
index 19e21751d63e6f023edfb95969d12f5b7b0fff28..f352cb7806dc30cb8e029b31fa9693e5a58c7671 100644
--- a/core/src/fxcodec/lgif/fx_gif.h
+++ b/core/src/fxcodec/lgif/fx_gif.h
@@ -11,14 +11,6 @@
 
 #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
@@ -208,7 +200,7 @@ class CGifLZWEncoder {
 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;
@@ -303,32 +295,32 @@ struct tag_gif_compress_struct {
 #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_