diff options
Diffstat (limited to 'src/3rdparty/freetype/src/type1/t1parse.c')
| -rw-r--r-- | src/3rdparty/freetype/src/type1/t1parse.c | 184 |
1 files changed, 73 insertions, 111 deletions
diff --git a/src/3rdparty/freetype/src/type1/t1parse.c b/src/3rdparty/freetype/src/type1/t1parse.c index 8e201e5ef5..6dec6c16c3 100644 --- a/src/3rdparty/freetype/src/type1/t1parse.c +++ b/src/3rdparty/freetype/src/type1/t1parse.c @@ -1,56 +1,55 @@ -/***************************************************************************/ -/* */ -/* t1parse.c */ -/* */ -/* Type 1 parser (body). */ -/* */ -/* Copyright 1996-2018 by */ -/* David Turner, Robert Wilhelm, and Werner Lemberg. */ -/* */ -/* This file is part of the FreeType project, and may only be used, */ -/* modified, and distributed under the terms of the FreeType project */ -/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ -/* this file you indicate that you have read the license and */ -/* understand and accept it fully. */ -/* */ -/***************************************************************************/ - - - /*************************************************************************/ - /* */ - /* The Type 1 parser is in charge of the following: */ - /* */ - /* - provide an implementation of a growing sequence of objects called */ - /* a `T1_Table' (used to build various tables needed by the loader). */ - /* */ - /* - opening .pfb and .pfa files to extract their top-level and private */ - /* dictionaries. */ - /* */ - /* - read numbers, arrays & strings from any dictionary. */ - /* */ - /* See `t1load.c' to see how data is loaded from the font file. */ - /* */ - /*************************************************************************/ - - -#include <ft2build.h> -#include FT_INTERNAL_DEBUG_H -#include FT_INTERNAL_STREAM_H -#include FT_INTERNAL_POSTSCRIPT_AUX_H +/**************************************************************************** + * + * t1parse.c + * + * Type 1 parser (body). + * + * Copyright (C) 1996-2023 by + * David Turner, Robert Wilhelm, and Werner Lemberg. + * + * This file is part of the FreeType project, and may only be used, + * modified, and distributed under the terms of the FreeType project + * license, LICENSE.TXT. By continuing to use, modify, or distribute + * this file you indicate that you have read the license and + * understand and accept it fully. + * + */ + + + /************************************************************************** + * + * The Type 1 parser is in charge of the following: + * + * - provide an implementation of a growing sequence of objects called + * a `T1_Table' (used to build various tables needed by the loader). + * + * - opening .pfb and .pfa files to extract their top-level and private + * dictionaries. + * + * - read numbers, arrays & strings from any dictionary. + * + * See `t1load.c' to see how data is loaded from the font file. + * + */ + + +#include <freetype/internal/ftdebug.h> +#include <freetype/internal/ftstream.h> +#include <freetype/internal/psaux.h> #include "t1parse.h" #include "t1errors.h" - /*************************************************************************/ - /* */ - /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ - /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ - /* messages during execution. */ - /* */ + /************************************************************************** + * + * The macro FT_COMPONENT is used in trace mode. It is an implicit + * parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log + * messages during execution. + */ #undef FT_COMPONENT -#define FT_COMPONENT trace_t1parse +#define FT_COMPONENT t1parse /*************************************************************************/ @@ -169,21 +168,21 @@ } } - /******************************************************************/ - /* */ - /* Here a short summary of what is going on: */ - /* */ - /* When creating a new Type 1 parser, we try to locate and load */ - /* the base dictionary if this is possible (i.e., for PFB */ - /* files). Otherwise, we load the whole font into memory. */ - /* */ - /* When `loading' the base dictionary, we only setup pointers */ - /* in the case of a memory-based stream. Otherwise, we */ - /* allocate and load the base dictionary in it. */ - /* */ - /* parser->in_pfb is set if we are in a binary (`.pfb') font. */ - /* parser->in_memory is set if we have a memory stream. */ - /* */ + /******************************************************************* + * + * Here a short summary of what is going on: + * + * When creating a new Type 1 parser, we try to locate and load + * the base dictionary if this is possible (i.e., for PFB + * files). Otherwise, we load the whole font into memory. + * + * When `loading' the base dictionary, we only setup pointers + * in the case of a memory-based stream. Otherwise, we + * allocate and load the base dictionary in it. + * + * parser->in_pfb is set if we are in a binary (`.pfb') font. + * parser->in_memory is set if we have a memory stream. + */ /* try to compute the size of the base dictionary; */ /* look for a Postscript binary file tag, i.e., 0x8001 */ @@ -222,7 +221,7 @@ else { /* read segment in memory -- this is clumsy, but so does the format */ - if ( FT_ALLOC( parser->base_dict, size ) || + if ( FT_QALLOC( parser->base_dict, size ) || FT_STREAM_READ( parser->base_dict, size ) ) goto Exit; parser->base_len = size; @@ -303,8 +302,8 @@ goto Fail; } - if ( FT_STREAM_SEEK( start_pos ) || - FT_ALLOC( parser->private_dict, parser->private_len ) ) + if ( FT_STREAM_SEEK( start_pos ) || + FT_QALLOC( parser->private_dict, parser->private_len ) ) goto Fail; parser->private_len = 0; @@ -331,50 +330,25 @@ /* the private dict. Otherwise, simply overwrite into the base */ /* dictionary block in the heap. */ - /* first of all, look at the `eexec' keyword */ + /* First look for the `eexec' keyword. Ensure `eexec' is real -- */ + /* it could be in a comment or string (as e.g. in u003043t.gsf */ + /* from ghostscript). */ FT_Byte* cur = parser->base_dict; FT_Byte* limit = cur + parser->base_len; FT_Pointer pos_lf; FT_Bool test_cr; - Again: - for (;;) - { - if ( cur[0] == 'e' && - cur + 9 < limit ) /* 9 = 5 letters for `eexec' + */ - /* whitespace + 4 chars */ - { - if ( cur[1] == 'e' && - cur[2] == 'x' && - cur[3] == 'e' && - cur[4] == 'c' ) - break; - } - cur++; - if ( cur >= limit ) - { - FT_ERROR(( "T1_Get_Private_Dict:" - " could not find `eexec' keyword\n" )); - error = FT_THROW( Invalid_File_Format ); - goto Exit; - } - } - - /* check whether `eexec' was real -- it could be in a comment */ - /* or string (as e.g. in u003043t.gsf from ghostscript) */ - parser->root.cursor = parser->base_dict; - /* set limit to `eexec' + whitespace + 4 characters */ - parser->root.limit = cur + 10; + parser->root.limit = parser->base_dict + parser->base_len; cur = parser->root.cursor; limit = parser->root.limit; while ( cur < limit ) { - if ( cur[0] == 'e' && - cur + 5 < limit ) + /* 9 = 5 letters for `eexec' + whitespace + 4 chars */ + if ( cur[0] == 'e' && cur + 9 < limit ) { if ( cur[1] == 'e' && cur[2] == 'x' && @@ -390,21 +364,9 @@ cur = parser->root.cursor; } - /* we haven't found the correct `eexec'; go back and continue */ - /* searching */ - - cur = limit; - limit = parser->base_dict + parser->base_len; - - if ( cur >= limit ) - { - FT_ERROR(( "T1_Get_Private_Dict:" - " premature end in private dictionary\n" )); - error = FT_THROW( Invalid_File_Format ); - goto Exit; - } - - goto Again; + FT_ERROR(( "T1_Get_Private_Dict: could not find `eexec' keyword\n" )); + error = FT_THROW( Invalid_File_Format ); + goto Exit; /* now determine where to write the _encrypted_ binary private */ /* dictionary. We overwrite the base dictionary for disk-based */ @@ -451,7 +413,7 @@ if ( parser->in_memory ) { /* note that we allocate one more byte to put a terminating `0' */ - if ( FT_ALLOC( parser->private_dict, size + 1 ) ) + if ( FT_QALLOC( parser->private_dict, size + 1 ) ) goto Fail; parser->private_len = size; } |