APPLICATION_EXT_FUNC_CODE COMMENT_EXT_FUNC_CODE D_GIF_ERR_CLOSE_FAILED D_GIF_ERR_DATA_TOO_BIG D_GIF_ERR_EOF_TOO_SOON D_GIF_ERR_IMAGE_DEFECT D_GIF_ERR_NO_COLOR_MAP D_GIF_ERR_NO_IMAG_DSCR D_GIF_ERR_NO_SCRN_DSCR D_GIF_ERR_NOT_ENOUGH_MEM D_GIF_ERR_NOT_GIF_FILE D_GIF_ERR_NOT_READABLE D_GIF_ERR_OPEN_FAILED D_GIF_ERR_READ_FAILED D_GIF_ERR_WRONG_RECORD DGifCloseFile DGifOpen DGifSlurp EXTENSION_RECORD_TYPE GIF87_STAMP GIF89_STAMP GIF_ERROR GIF_FILE_BUFFER_SIZE GIF_OK GIF_STAMP GIF_STAMP_LEN GIF_VERSION_POS GifBooleanType GifByteType GifPixelType GifPrefixType GifRecordType GifRowType GifWord GRAPHICS_EXT_FUNC_CODE IMAGE_DESC_RECORD_TYPE InputFunc PLAINTEXT_EXT_FUNC_CODE SCREEN_DESC_RECORD_TYPE TERMINATE_RECORD_TYPE UNDEFINED_RECORD_TYPE

GifFileType* DGifOpen ( void *  userPtr, InputFunc  readFunc  ) Definition at line 915 of file ungif.c. Referenced by GifDecoder_Initialize(). { unsigned char Buf[GIF_STAMP_LEN + 1]; GifFileType *GifFile; GifFilePrivateType *Private; GifFile = ungif_alloc(sizeof(GifFileType)); if (GifFile == NULL) { return NULL; } memset(GifFile, '\0', sizeof(GifFileType)); Private = ungif_alloc(sizeof(GifFilePrivateType)); if (!Private) { ungif_free(GifFile); return NULL; } GifFile->Private = (void*)Private; Private->Read = readFunc; /* TVT */ GifFile->UserData = userData; /* TVT */ /* Lets see if this is a GIF file: */ if (READ(GifFile, Buf, GIF_STAMP_LEN) != GIF_STAMP_LEN) { ungif_free(Private); ungif_free(GifFile); return NULL; } /* The GIF Version number is ignored at this time. Maybe we should do * something more useful with it. */ Buf[GIF_STAMP_LEN] = 0; if (memcmp(GIF_STAMP, Buf, GIF_VERSION_POS) != 0) { ungif_free(Private); ungif_free(GifFile); return NULL; } if (DGifGetScreenDesc(GifFile) == GIF_ERROR) { ungif_free(Private); ungif_free(GifFile); return NULL; } return GifFile; }