X-Git-Url: http://git.jankratochvil.net/?p=reactos.git;a=blobdiff_plain;f=subsys%2Fwin32k%2Ffreetype%2Fsrc%2Ftype1z%2Fz1parse.c;fp=subsys%2Fwin32k%2Ffreetype%2Fsrc%2Ftype1z%2Fz1parse.c;h=0000000000000000000000000000000000000000;hp=8c2dacb8792a386a5d591ba74399be12b6e1f95c;hb=7c0db166f81fbe8c8b913d7f26048e337d383605;hpb=e3ed2d773259cc445c7ff8181ebd934931365328 diff --git a/subsys/win32k/freetype/src/type1z/z1parse.c b/subsys/win32k/freetype/src/type1z/z1parse.c deleted file mode 100644 index 8c2dacb..0000000 --- a/subsys/win32k/freetype/src/type1z/z1parse.c +++ /dev/null @@ -1,1398 +0,0 @@ -/***************************************************************************/ -/* */ -/* z1parse.c */ -/* */ -/* Experimental Type 1 parser (body). */ -/* */ -/* Copyright 1996-2000 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 `Z1_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 `z1load.c' to see how data is loaded from the font file. */ - /* */ - /*************************************************************************/ - - -#include -#include -#include -#include -#include - - -#ifdef FT_FLAT_COMPILE - -#include "z1parse.h" - -#else - -#include - -#endif - - -#include /* for strncmp() */ - - - /*************************************************************************/ - /* */ - /* 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_z1parse - - - /*************************************************************************/ - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** IMPLEMENTATION OF Z1_TABLE OBJECT *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - /*************************************************************************/ - - - /*************************************************************************/ - /* */ - /* */ - /* Z1_New_Table */ - /* */ - /* */ - /* Initialises a Z1_Table. */ - /* */ - /* */ - /* table :: The address of the target table. */ - /* */ - /* */ - /* count :: The table size = the maximum number of elements. */ - /* */ - /* memory :: The memory object to use for all subsequent */ - /* reallocations. */ - /* */ - /* */ - /* FreeType error code. 0 means success. */ - /* */ - LOCAL_FUNC - FT_Error Z1_New_Table( Z1_Table* table, - FT_Int count, - FT_Memory memory ) - { - FT_Error error; - - - table->memory = memory; - if ( ALLOC_ARRAY( table->elements, count, FT_Byte* ) || - ALLOC_ARRAY( table->lengths, count, FT_Byte* ) ) - goto Exit; - - table->max_elems = count; - table->init = 0xdeadbeef; - table->num_elems = 0; - table->block = 0; - table->capacity = 0; - table->cursor = 0; - - Exit: - if ( error ) - FREE( table->elements ); - - return error; - } - - - static - void shift_elements( Z1_Table* table, - FT_Byte* old_base ) - { - FT_Long delta = table->block - old_base; - FT_Byte** offset = table->elements; - FT_Byte** limit = offset + table->max_elems; - - - if ( delta ) - for ( ; offset < limit; offset++ ) - { - if ( offset[0] ) - offset[0] += delta; - } - } - - - static - FT_Error reallocate_t1_table( Z1_Table* table, - FT_Int new_size ) - { - FT_Memory memory = table->memory; - FT_Byte* old_base = table->block; - FT_Error error; - - - /* reallocate the base block */ - if ( REALLOC( table->block, table->capacity, new_size ) ) - return error; - - table->capacity = new_size; - - /* shift all offsets if necessary */ - if ( old_base ) - shift_elements( table, old_base ); - - return T1_Err_Ok; - } - - - /*************************************************************************/ - /* */ - /* */ - /* Z1_Add_Table */ - /* */ - /* */ - /* Adds an object to a Z1_Table, possibly growing its memory block. */ - /* */ - /* */ - /* table :: The target table. */ - /* */ - /* */ - /* index :: The index of the object in the table. */ - /* */ - /* object :: The address of the object to copy in memory. */ - /* */ - /* length :: The length in bytes of the source object. */ - /* */ - /* */ - /* FreeType error code. 0 means success. An error is returned if a */ - /* reallocation fails. */ - /* */ - LOCAL_FUNC - FT_Error Z1_Add_Table( Z1_Table* table, - FT_Int index, - void* object, - FT_Int length ) - { - if ( index < 0 || index > table->max_elems ) - { - FT_ERROR(( "Z1_Add_Table: invalid index\n" )); - return T1_Err_Syntax_Error; - } - - /* grow the base block if needed */ - if ( table->cursor + length > table->capacity ) - { - FT_Error error; - FT_Int new_size = table->capacity; - - - while ( new_size < table->cursor + length ) - new_size += 1024; - - error = reallocate_t1_table( table, new_size ); - if ( error ) - return error; - } - - /* add the object to the base block and adjust offset */ - table->elements[index] = table->block + table->cursor; - table->lengths [index] = length; - MEM_Copy( table->block + table->cursor, object, length ); - - table->cursor += length; - return T1_Err_Ok; - } - - -#if 0 - - /*************************************************************************/ - /* */ - /* */ - /* Z1_Done_Table */ - /* */ - /* */ - /* Finalizes a Z1_Table (i.e., reallocate it to its current cursor). */ - /* */ - /* */ - /* table :: The target table. */ - /* */ - /* */ - /* This function does NOT release the heap's memory block. It is up */ - /* to the caller to clean it, or reference it in its own structures. */ - /* */ - LOCAL_FUNC - void Z1_Done_Table( Z1_Table* table ) - { - FT_Memory memory = table->memory; - FT_Error error; - FT_Byte* old_base; - - - /* should never fail, as rec.cursor <= rec.size */ - old_base = table->block; - if ( !old_base ) - return; - - (void)REALLOC( table->block, table->capacity, table->cursor ); - table->capacity = table->cursor; - - if ( old_base != table->block ) - shift_elements( table, old_base ); - } - -#endif /* 0 */ - - - LOCAL_FUNC - void Z1_Release_Table( Z1_Table* table ) - { - FT_Memory memory = table->memory; - - - if ( table->init == (FT_Long)0xDEADBEEF ) - { - FREE( table->block ); - FREE( table->elements ); - FREE( table->lengths ); - table->init = 0; - } - } - - - /*************************************************************************/ - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** INPUT STREAM PARSER *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - /*************************************************************************/ - - -#define IS_Z1_WHITESPACE( c ) ( (c) == ' ' || (c) == '\t' ) -#define IS_Z1_LINESPACE( c ) ( (c) == '\r' || (c) == '\n' ) - -#define IS_Z1_SPACE( c ) ( IS_Z1_WHITESPACE( c ) || IS_Z1_LINESPACE( c ) ) - - - LOCAL_FUNC - void Z1_Skip_Spaces( Z1_Parser* parser ) - { - FT_Byte* cur = parser->cursor; - FT_Byte* limit = parser->limit; - - - while ( cur < limit ) - { - FT_Byte c = *cur; - - - if ( !IS_Z1_SPACE( c ) ) - break; - cur++; - } - parser->cursor = cur; - } - - - LOCAL_FUNC - void Z1_ToToken( Z1_Parser* parser, - Z1_Token_Rec* token ) - { - FT_Byte* cur; - FT_Byte* limit; - FT_Byte starter, ender; - FT_Int embed; - - - token->type = t1_token_none; - token->start = 0; - token->limit = 0; - - /* first of all, skip space */ - Z1_Skip_Spaces( parser ); - - cur = parser->cursor; - limit = parser->limit; - - if ( cur < limit ) - { - switch ( *cur ) - { - /************* check for strings ***********************/ - case '(': - token->type = t1_token_string; - ender = ')'; - goto Lookup_Ender; - - /************* check for programs/array ****************/ - case '{': - token->type = t1_token_array; - ender = '}'; - goto Lookup_Ender; - - /************* check for table/array ******************/ - case '[': - token->type = t1_token_array; - ender = ']'; - - Lookup_Ender: - embed = 1; - starter = *cur++; - token->start = cur; - while ( cur < limit ) - { - if ( *cur == starter ) - embed++; - else if ( *cur == ender ) - { - embed--; - if ( embed <= 0 ) - { - token->limit = cur++; - break; - } - } - cur++; - } - break; - - /* **************** otherwise, it's any token **********/ - default: - token->start = cur++; - token->type = t1_token_any; - while ( cur < limit && !IS_Z1_SPACE( *cur ) ) - cur++; - - token->limit = cur; - } - - if ( !token->limit ) - { - token->start = 0; - token->type = t1_token_none; - } - - parser->cursor = cur; - } - } - - - LOCAL_FUNC - void Z1_ToTokenArray( Z1_Parser* parser, - Z1_Token_Rec* tokens, - FT_UInt max_tokens, - FT_Int* pnum_tokens ) - { - Z1_Token_Rec master; - - - *pnum_tokens = -1; - - Z1_ToToken( parser, &master ); - if ( master.type == t1_token_array ) - { - FT_Byte* old_cursor = parser->cursor; - FT_Byte* old_limit = parser->limit; - Z1_Token_Rec* cur = tokens; - Z1_Token_Rec* limit = cur + max_tokens; - - - parser->cursor = master.start; - parser->limit = master.limit; - - while ( parser->cursor < parser->limit ) - { - Z1_Token_Rec token; - - - Z1_ToToken( parser, &token ); - if ( !token.type ) - break; - - if ( cur < limit ) - *cur = token; - - cur++; - } - - *pnum_tokens = cur - tokens; - - parser->cursor = old_cursor; - parser->limit = old_limit; - } - } - - - static - FT_Long t1_toint( FT_Byte** cursor, - FT_Byte* limit ) - { - FT_Long result = 0; - FT_Byte* cur = *cursor; - FT_Byte c, d; - - - for ( ; cur < limit; cur++ ) - { - c = *cur; - d = (FT_Byte)( c - '0' ); - if ( d < 10 ) - break; - - if ( c == '-' ) - { - cur++; - break; - } - } - - if ( cur < limit ) - { - do - { - d = (FT_Byte)( cur[0] - '0' ); - if ( d >= 10 ) - break; - - result = result * 10 + d; - cur++; - - } while ( cur < limit ); - - if ( c == '-' ) - result = -result; - } - - *cursor = cur; - return result; - } - - - static - FT_Long t1_tofixed( FT_Byte** cursor, - FT_Byte* limit, - FT_Long power_ten ) - { - FT_Byte* cur = *cursor; - FT_Long num, divider, result; - FT_Int sign = 0; - FT_Byte d; - - - if ( cur >= limit ) - return 0; - - /* first of all, read the integer part */ - result = t1_toint( &cur, limit ) << 16; - num = 0; - divider = 1; - - if ( result < 0 ) - { - sign = 1; - result = -result; - } - - if ( cur >= limit ) - goto Exit; - - /* read decimal part, if any */ - if ( *cur == '.' && cur + 1 < limit ) - { - cur++; - - for (;;) - { - d = (FT_Byte)( *cur - '0' ); - if ( d >= 10 ) - break; - - if ( divider < 10000000L ) - { - num = num * 10 + d; - divider *= 10; - } - - cur++; - if ( cur >= limit ) - break; - } - } - - /* read exponent, if any */ - if ( cur + 1 < limit && ( *cur == 'e' || *cur == 'E' ) ) - { - cur++; - power_ten += t1_toint( &cur, limit ); - } - - Exit: - /* raise to power of ten if needed */ - while ( power_ten > 0 ) - { - result = result * 10; - num = num * 10; - power_ten--; - } - - while ( power_ten < 0 ) - { - result = result / 10; - divider = divider * 10; - power_ten++; - } - - if ( num ) - result += FT_DivFix( num, divider ); - - if ( sign ) - result = -result; - - *cursor = cur; - return result; - } - - - static - FT_Int t1_tocoordarray( FT_Byte** cursor, - FT_Byte* limit, - FT_Int max_coords, - FT_Short* coords ) - { - FT_Byte* cur = *cursor; - FT_Int count = 0; - FT_Byte c, ender; - - - if ( cur >= limit ) - goto Exit; - - /* check for the beginning of an array. If not, only one number will */ - /* be read */ - c = *cur; - ender = 0; - - if ( c == '[' ) - ender = ']'; - - if ( c == '{' ) - ender = '}'; - - if ( ender ) - cur++; - - /* now, read the coordinates */ - for ( ; cur < limit; ) - { - /* skip whitespace in front of data */ - for (;;) - { - c = *cur; - if ( c != ' ' && c != '\t' ) - break; - - cur++; - if ( cur >= limit ) - goto Exit; - } - - if ( count >= max_coords || c == ender ) - break; - - coords[count] = (FT_Short)( t1_tofixed( &cur, limit, 0 ) >> 16 ); - count++; - - if ( !ender ) - break; - } - - Exit: - *cursor = cur; - return count; - } - - - static - FT_Int t1_tofixedarray( FT_Byte** cursor, - FT_Byte* limit, - FT_Int max_values, - FT_Fixed* values, - FT_Int power_ten ) - { - FT_Byte* cur = *cursor; - FT_Int count = 0; - FT_Byte c, ender; - - - if ( cur >= limit ) goto Exit; - - /* check for the beginning of an array. If not, only one number will */ - /* be read */ - c = *cur; - ender = 0; - - if ( c == '[' ) - ender = ']'; - - if ( c == '{' ) - ender = '}'; - - if ( ender ) - cur++; - - /* now, read the values */ - for ( ; cur < limit; ) - { - /* skip whitespace in front of data */ - for (;;) - { - c = *cur; - if ( c != ' ' && c != '\t' ) - break; - - cur++; - if ( cur >= limit ) - goto Exit; - } - - if ( count >= max_values || c == ender ) - break; - - values[count] = t1_tofixed( &cur, limit, power_ten ); - count++; - - if ( !ender ) - break; - } - - Exit: - *cursor = cur; - return count; - } - - -#if 0 - - static - FT_String* t1_tostring( FT_Byte** cursor, - FT_Byte* limit, - FT_Memory memory ) - { - FT_Byte* cur = *cursor; - FT_Int len = 0; - FT_Int count; - FT_String* result; - FT_Error error; - - - /* XXX: some stupid fonts have a `Notice' or `Copyright' string */ - /* that simply doesn't begin with an opening parenthesis, even */ - /* though they have a closing one! E.g. "amuncial.pfb" */ - /* */ - /* We must deal with these ill-fated cases there. Note that */ - /* these fonts didn't work with the old Type 1 driver as the */ - /* notice/copyright was not recognized as a valid string token */ - /* and made the old token parser commit errors. */ - - while ( cur < limit && ( *cur == ' ' || *cur == '\t' ) ) - cur++; - if ( cur + 1 >= limit ) - return 0; - - if ( *cur == '(' ) - cur++; /* skip the opening parenthesis, if there is one */ - - *cursor = cur; - count = 0; - - /* then, count its length */ - for ( ; cur < limit; cur++ ) - { - if ( *cur == '(' ) - count++; - - else if ( *cur == ')' ) - { - count--; - if ( count < 0 ) - break; - } - } - - len = cur - *cursor; - if ( cur >= limit || ALLOC( result, len + 1 ) ) - return 0; - - /* now copy the string */ - MEM_Copy( result, *cursor, len ); - result[len] = '\0'; - *cursor = cur; - return result; - } - -#endif /* 0 */ - - - static - int t1_tobool( FT_Byte** cursor, - FT_Byte* limit ) - { - FT_Byte* cur = *cursor; - FT_Bool result = 0; - - - /* return 1 if we find `true', 0 otherwise */ - if ( cur + 3 < limit && - cur[0] == 't' && - cur[1] == 'r' && - cur[2] == 'u' && - cur[3] == 'e' ) - { - result = 1; - cur += 5; - } - else if ( cur + 4 < limit && - cur[0] == 'f' && - cur[1] == 'a' && - cur[2] == 'l' && - cur[3] == 's' && - cur[4] == 'e' ) - { - result = 0; - cur += 6; - } - - *cursor = cur; - return result; - } - - - /* Load a simple field (i.e. non-table) into the current list of objects */ - LOCAL_FUNC - FT_Error Z1_Load_Field( Z1_Parser* parser, - const Z1_Field_Rec* field, - void** objects, - FT_UInt max_objects, - FT_ULong* pflags ) - { - Z1_Token_Rec token; - FT_Byte* cur; - FT_Byte* limit; - FT_UInt count; - FT_UInt index; - FT_Error error; - - - Z1_ToToken( parser, &token ); - if ( !token.type ) - goto Fail; - - count = 1; - index = 0; - cur = token.start; - limit = token.limit; - - if ( token.type == t1_token_array ) - { - /* if this is an array, and we have no blend, an error occurs */ - if ( max_objects == 0 ) - goto Fail; - - count = max_objects; - index = 1; - } - - for ( ; count > 0; count--, index++ ) - { - FT_Byte* q = (FT_Byte*)objects[index] + field->offset; - FT_Long val; - FT_String* string; - - switch ( field->type ) - { - case t1_field_bool: - val = t1_tobool( &cur, limit ); - goto Store_Integer; - - case t1_field_fixed: - val = t1_tofixed( &cur, limit, 3 ); - goto Store_Integer; - - case t1_field_integer: - val = t1_toint( &cur, limit ); - - Store_Integer: - switch ( field->size ) - { - case 1: - *(FT_Byte*)q = (FT_Byte)val; - break; - - case 2: - *(FT_UShort*)q = (FT_UShort)val; - break; - - case 4: - *(FT_UInt32*)q = (FT_UInt32)val; - break; - - default: /* for 64-bit systems */ - *(FT_Long*)q = val; - } - break; - - case t1_field_string: - { - FT_Memory memory = parser->memory; - FT_UInt len = limit-cur; - - if ( ALLOC( string, len + 1 ) ) - goto Exit; - - MEM_Copy( string, cur, len ); - string[len] = 0; - - *(FT_String**)q = string; - } - break; - - default: - /* an error occured */ - goto Fail; - } - } - - if ( pflags ) - *pflags |= 1L << field->flag_bit; - - error = FT_Err_Ok; - - Exit: - return error; - - Fail: - error = T1_Err_Invalid_File_Format; - goto Exit; - } - - -#define T1_MAX_TABLE_ELEMENTS 32 - - - LOCAL_FUNC - FT_Error Z1_Load_Field_Table( Z1_Parser* parser, - const Z1_Field_Rec* field, - void** objects, - FT_UInt max_objects, - FT_ULong* pflags ) - { - Z1_Token_Rec elements[T1_MAX_TABLE_ELEMENTS]; - Z1_Token_Rec* token; - FT_Int num_elements; - FT_Error error = 0; - FT_Byte* old_cursor; - FT_Byte* old_limit; - Z1_Field_Rec fieldrec = *(Z1_Field_Rec*)field; - - - Z1_ToTokenArray( parser, elements, 32, &num_elements ); - if ( num_elements < 0 ) - goto Fail; - - if ( num_elements > T1_MAX_TABLE_ELEMENTS ) - num_elements = T1_MAX_TABLE_ELEMENTS; - - old_cursor = parser->cursor; - old_limit = parser->limit; - - /* we store the elements count */ - *(FT_Byte*)( (FT_Byte*)objects[0] + field->count_offset ) = num_elements; - - /* we now load each element, adjusting the field.offset on each one */ - token = elements; - for ( ; num_elements > 0; num_elements--, token++ ) - { - parser->cursor = token->start; - parser->limit = token->limit; - Z1_Load_Field( parser, &fieldrec, objects, max_objects, 0 ); - fieldrec.offset += fieldrec.size; - } - - if ( pflags ) - *pflags |= 1L << field->flag_bit; - - parser->cursor = old_cursor; - parser->limit = old_limit; - - Exit: - return error; - - Fail: - error = T1_Err_Invalid_File_Format; - goto Exit; - } - - - LOCAL_FUNC - FT_Long Z1_ToInt ( Z1_Parser* parser ) - { - return t1_toint( &parser->cursor, parser->limit ); - } - - - LOCAL_FUNC - FT_Long Z1_ToFixed( Z1_Parser* parser, - FT_Int power_ten ) - { - return t1_tofixed( &parser->cursor, parser->limit, power_ten ); - } - - - LOCAL_FUNC - FT_Int Z1_ToCoordArray( Z1_Parser* parser, - FT_Int max_coords, - FT_Short* coords ) - { - return t1_tocoordarray( &parser->cursor, parser->limit, - max_coords, coords ); - } - - - LOCAL_FUNC - FT_Int Z1_ToFixedArray( Z1_Parser* parser, - FT_Int max_values, - FT_Fixed* values, - FT_Int power_ten ) - { - return t1_tofixedarray( &parser->cursor, parser->limit, - max_values, values, power_ten ); - } - - -#if 0 - - LOCAL_FUNC - FT_String* Z1_ToString( Z1_Parser* parser ) - { - return t1_tostring( &parser->cursor, parser->limit, parser->memory ); - } - - - LOCAL_FUNC - FT_Bool Z1_ToBool( Z1_Parser* parser ) - { - return t1_tobool( &parser->cursor, parser->limit ); - } - -#endif /* 0 */ - - - static - FT_Error read_pfb_tag( FT_Stream stream, - FT_UShort* tag, - FT_Long* size ) - { - FT_Error error; - - - if ( READ_UShort( *tag ) ) - goto Exit; - - if ( *tag == 0x8001 || *tag == 0x8002 ) - { - FT_Long asize; - - - if ( READ_ULong( asize ) ) - goto Exit; - - /* swap between big and little endianness */ - *size = ( ( asize & 0xFF000000L ) >> 24 ) | - ( ( asize & 0x00FF0000L ) >> 8 ) | - ( ( asize & 0x0000FF00L ) << 8 ) | - ( ( asize & 0x000000FFL ) << 24 ); - } - - Exit: - return error; - } - - - LOCAL_FUNC - FT_Error Z1_New_Parser( Z1_Parser* parser, - FT_Stream stream, - FT_Memory memory ) - { - FT_Error error; - FT_UShort tag; - FT_Long size; - - - parser->stream = stream; - parser->memory = memory; - parser->base_len = 0; - parser->base_dict = 0; - parser->private_len = 0; - parser->private_dict = 0; - parser->in_pfb = 0; - parser->in_memory = 0; - parser->single_block = 0; - - parser->cursor = 0; - parser->limit = 0; - - /******************************************************************/ - /* */ - /* 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 */ - if ( FILE_Seek( 0L ) ) - goto Exit; - - error = read_pfb_tag( stream, &tag, &size ); - if ( error ) - goto Exit; - - if ( tag != 0x8001 ) - { - /* assume that this is a PFA file for now; an error will */ - /* be produced later when more things are checked */ - (void)FILE_Seek( 0L ); - size = stream->size; - } - else - parser->in_pfb = 1; - - /* now, try to load `size' bytes of the `base' dictionary we */ - /* found previously */ - - /* if it is a memory-based resource, set up pointers */ - if ( !stream->read ) - { - parser->base_dict = (FT_Byte*)stream->base + stream->pos; - parser->base_len = size; - parser->in_memory = 1; - - /* check that the `size' field is valid */ - if ( FILE_Skip( size ) ) - goto Exit; - } - else - { - /* read segment in memory */ - if ( ALLOC( parser->base_dict, size ) || - FILE_Read( parser->base_dict, size ) ) - goto Exit; - parser->base_len = size; - } - - /* Now check font format; we must see `%!PS-AdobeFont-1' */ - /* or `%!FontType' */ - { - if ( size <= 16 || - ( strncmp( (const char*)parser->base_dict, - "%!PS-AdobeFont-1", 16 ) && - strncmp( (const char*)parser->base_dict, - "%!FontType", 10 ) ) ) - { - FT_TRACE2(( "[not a Type1 font]\n" )); - error = FT_Err_Unknown_File_Format; - } - else - { - parser->cursor = parser->base_dict; - parser->limit = parser->cursor + parser->base_len; - } - } - - Exit: - if ( error && !parser->in_memory ) - FREE( parser->base_dict ); - - return error; - } - - - LOCAL_FUNC - void Z1_Done_Parser( Z1_Parser* parser ) - { - FT_Memory memory = parser->memory; - - - /* always free the private dictionary */ - FREE( parser->private_dict ); - - /* free the base dictionary only when we have a disk stream */ - if ( !parser->in_memory ) - FREE( parser->base_dict ); - } - - - /* return the value of an hexadecimal digit */ - static - int hexa_value( char c ) - { - unsigned int d; - - - d = (unsigned int)( c - '0' ); - if ( d <= 9 ) - return (int)d; - - d = (unsigned int)( c - 'a' ); - if ( d <= 5 ) - return (int)( d + 10 ); - - d = (unsigned int)( c - 'A' ); - if ( d <= 5 ) - return (int)( d + 10 ); - - return -1; - } - - - LOCAL_FUNC - void Z1_Decrypt( FT_Byte* buffer, - FT_Int length, - FT_UShort seed ) - { - while ( length > 0 ) - { - FT_Byte plain; - - - plain = ( *buffer ^ ( seed >> 8 ) ); - seed = ( *buffer + seed ) * 52845 + 22719; - *buffer++ = plain; - length--; - } - } - - - LOCAL_FUNC - FT_Error Z1_Get_Private_Dict( Z1_Parser* parser ) - { - FT_Stream stream = parser->stream; - FT_Memory memory = parser->memory; - FT_Error error = 0; - FT_Long size; - - - if ( parser->in_pfb ) - { - /* in the case of the PFB format, the private dictionary can be */ - /* made of several segments. We thus first read the number of */ - /* segments to compute the total size of the private dictionary */ - /* then re-read them into memory. */ - FT_Long start_pos = FILE_Pos(); - FT_UShort tag; - FT_Long size; - - - parser->private_len = 0; - for (;;) - { - error = read_pfb_tag( stream, &tag, &size ); - if ( error ) - goto Fail; - - if ( tag != 0x8002 ) - break; - - parser->private_len += size; - - if ( FILE_Skip( size ) ) - goto Fail; - } - - /* Check that we have a private dictionary there */ - /* and allocate private dictionary buffer */ - if ( parser->private_len == 0 ) - { - FT_ERROR(( "Z1_Get_Private_Dict:" )); - FT_ERROR(( " invalid private dictionary section\n" )); - error = T1_Err_Invalid_File_Format; - goto Fail; - } - - if ( FILE_Seek( start_pos ) || - ALLOC( parser->private_dict, parser->private_len ) ) - goto Fail; - - parser->private_len = 0; - for (;;) - { - error = read_pfb_tag( stream, &tag, &size ); - if ( error || tag != 0x8002 ) - { - error = FT_Err_Ok; - break; - } - - if ( FILE_Read( parser->private_dict + parser->private_len, size ) ) - goto Fail; - - parser->private_len += size; - } - } - else - { - /* we have already `loaded' the whole PFA font file into memory; */ - /* if this is a memory resource, allocate a new block to hold */ - /* the private dict. Otherwise, simply overwrite into the base */ - /* dictionary block in the heap. */ - - /* first of all, look at the `eexec' keyword */ - FT_Byte* cur = parser->base_dict; - FT_Byte* limit = cur + parser->base_len; - FT_Byte c; - - - for (;;) - { - c = cur[0]; - if ( c == 'e' && cur + 9 < limit ) /* 9 = 5 letters for `eexec' + */ - /* newline + 4 chars */ - { - if ( cur[1] == 'e' && cur[2] == 'x' && - cur[3] == 'e' && cur[4] == 'c' ) - { - cur += 6; /* we skip the newling after the `eexec' */ - - /* XXX: Some fonts use DOS-linefeeds, i.e. \r\n; we need to */ - /* skip the extra \n if we find it */ - if ( cur[0] == '\n' ) - cur++; - - break; - } - } - cur++; - if ( cur >= limit ) - { - FT_ERROR(( "Z1_Get_Private_Dict:" )); - FT_ERROR(( " could not find `eexec' keyword\n" )); - error = T1_Err_Invalid_File_Format; - goto Exit; - } - } - - /* now determine where to write the _encrypted_ binary private */ - /* dictionary. We overwrite the base dictionary for disk-based */ - /* resources and allocate a new block otherwise */ - - size = parser->base_len - ( cur - parser->base_dict); - - if ( parser->in_memory ) - { - /* note that we allocate one more byte to put a terminating `0' */ - if ( ALLOC( parser->private_dict, size + 1 ) ) - goto Fail; - parser->private_len = size; - } - else - { - parser->single_block = 1; - parser->private_dict = parser->base_dict; - parser->private_len = size; - parser->base_dict = 0; - parser->base_len = 0; - } - - /* now determine whether the private dictionary is encoded in binary */ - /* or hexadecimal ASCII format -- decode it accordingly */ - - /* we need to access the next 4 bytes (after the final \r following */ - /* the `eexec' keyword); if they all are hexadecimal digits, then */ - /* we have a case of ASCII storage */ - - if ( ( hexa_value( cur[0] ) | hexa_value( cur[1] ) | - hexa_value( cur[2] ) | hexa_value( cur[3] ) ) < 0 ) - - /* binary encoding -- `simply' copy the private dict */ - MEM_Copy( parser->private_dict, cur, size ); - - else - { - /* ASCII hexadecimal encoding */ - - FT_Byte* write; - FT_Int count; - - - write = parser->private_dict; - count = 0; - - for ( ;cur < limit; cur++ ) - { - int hex1; - - - /* check for newline */ - if ( cur[0] == '\r' || cur[0] == '\n' ) - continue; - - /* exit if we have a non-hexadecimal digit that isn't a newline */ - hex1 = hexa_value( cur[0] ); - if ( hex1 < 0 || cur + 1 >= limit ) - break; - - /* otherwise, store byte */ - *write++ = ( hex1 << 4 ) | hexa_value( cur[1] ); - count++; - cur++; - } - - /* put a safeguard */ - parser->private_len = write - parser->private_dict; - *write++ = 0; - } - } - - /* we now decrypt the encoded binary private dictionary */ - Z1_Decrypt( parser->private_dict, parser->private_len, 55665 ); - parser->cursor = parser->private_dict; - parser->limit = parser->cursor + parser->private_len; - - Fail: - Exit: - return error; - } - - -/* END */