+++ /dev/null
-/***************************************************************************/
-/* */
-/* cidparse.c */
-/* */
-/* CID-keyed Type1 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. */
-/* */
-/***************************************************************************/
-
-
-#include <freetype/internal/ftdebug.h>
-#include <freetype/internal/ftcalc.h>
-#include <freetype/internal/ftobjs.h>
-#include <freetype/internal/ftstream.h>
-#include <freetype/internal/t1errors.h>
-
-
-#ifdef FT_FLAT_COMPILE
-
-#include "cidparse.h"
-
-#else
-
-#include <freetype/src/cid/cidparse.h>
-
-#endif
-
-
-#include <string.h> /* 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_cidparse
-
-
-#if 0
-
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** IMPLEMENTATION OF CID_TABLE OBJECT *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* CID_New_Table */
- /* */
- /* <Description> */
- /* Initializes a CID_Table. */
- /* */
- /* <InOut> */
- /* table :: The address of the target table. */
- /* */
- /* <Input> */
- /* count :: The table size, i.e., the maximal number of elements. */
- /* */
- /* memory :: The memory object to be used for all subsequent */
- /* reallocations. */
- /* */
- /* <Return> */
- /* FreeType error code. 0 means success. */
- /* */
- LOCAL_FUNC
- FT_Error CID_New_Table( CID_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 = 0xDEADBEEFL;
- 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( CID_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( CID_Table* table,
- FT_Int new_size )
- {
- FT_Memory memory = table->memory;
- FT_Byte* old_base = table->block;
- FT_Error error;
-
-
- /* realloc the base block */
- if ( REALLOC( table->block, table->capacity, new_size ) )
- return error;
-
- table->capacity = new_size;
-
- /* shift all offsets when needed */
- if ( old_base )
- shift_elements( table, old_base );
-
- return T1_Err_Ok;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* CID_Add_Table */
- /* */
- /* <Description> */
- /* Adds an object to a CID_Table, possibly growing its memory block. */
- /* */
- /* <InOut> */
- /* table :: The target table. */
- /* */
- /* <Input> */
- /* index :: The index of the object in the table. */
- /* */
- /* object :: The address of the object to copy in the memory. */
- /* */
- /* length :: The length in bytes of the source object. */
- /* */
- /* <Return> */
- /* FreeType error code. 0 means success. An error is returned if */
- /* reallocation fails. */
- /* */
- LOCAL_FUNC
- FT_Error CID_Add_Table( CID_Table* table,
- FT_Int index,
- void* object,
- FT_Int length )
- {
- if ( index < 0 || index > table->max_elems )
- {
- FT_ERROR(( "CID_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;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* CID_Done_Table */
- /* */
- /* <Description> */
- /* Finalizes a CID_Table (reallocate it to its current cursor). */
- /* */
- /* <InOut> */
- /* table :: The target table. */
- /* */
- /* <Note> */
- /* 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 CID_Done_Table( CID_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 );
- }
-
-
- LOCAL_FUNC
- void CID_Release_Table( CID_Table* table )
- {
- FT_Memory memory = table->memory;
-
-
- if ( table->init == 0xDEADBEEFL )
- {
- FREE( table->block );
- FREE( table->elements );
- FREE( table->lengths );
- table->init = 0;
- }
- }
-
-#endif /* 0 */
-
-
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** INPUT STREAM PARSER *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
-
-
-#define IS_CID_WHITESPACE( c ) ( (c) == ' ' || (c) == '\t' )
-#define IS_CID_LINESPACE( c ) ( (c) == '\r' || (c) == '\n' )
-
-#define IS_CID_SPACE( c ) ( IS_CID_WHITESPACE( c ) || IS_CID_LINESPACE( c ) )
-
-
- LOCAL_FUNC
- void CID_Skip_Spaces( CID_Parser* parser )
- {
- FT_Byte* cur = parser->cursor;
- FT_Byte* limit = parser->limit;
-
-
- while ( cur < limit )
- {
- FT_Byte c = *cur;
-
-
- if ( !IS_CID_SPACE( c ) )
- break;
- cur++;
- }
-
- parser->cursor = cur;
- }
-
-
- LOCAL_FUNC
- void CID_ToToken( CID_Parser* parser,
- CID_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 */
- CID_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 is any token **********/
- default:
- token->start = cur++;
- token->type = t1_token_any;
- while ( cur < limit && !IS_CID_SPACE( *cur ) )
- cur++;
-
- token->limit = cur;
- }
-
- if ( !token->limit )
- {
- token->start = 0;
- token->type = t1_token_none;
- }
-
- parser->cursor = cur;
- }
- }
-
-
- LOCAL_FUNC
- void CID_ToTokenArray( CID_Parser* parser,
- CID_Token_Rec* tokens,
- FT_UInt max_tokens,
- FT_Int* pnum_tokens )
- {
- CID_Token_Rec master;
-
-
- *pnum_tokens = -1;
-
- CID_ToToken( parser, &master );
-
- if ( master.type == t1_token_array )
- {
- FT_Byte* old_cursor = parser->cursor;
- FT_Byte* old_limit = parser->limit;
- CID_Token_Rec* cur = tokens;
- CID_Token_Rec* limit = cur + max_tokens;
-
-
- parser->cursor = master.start;
- parser->limit = master.limit;
-
- while ( parser->cursor < parser->limit )
- {
- CID_Token_Rec token;
-
-
- CID_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
- int t1_tobool( FT_Byte** cursor,
- FT_Byte* limit )
- {
- FT_Byte* cur = *cursor;
- FT_Bool result = 0;
-
-
- /* return 1 if we find a "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;
- }
-
-
- 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;
- }
-
-
- /* Loads a simple field (i.e. non-table) into the current */
- /* list of objects */
- LOCAL_FUNC
- FT_Error CID_Load_Field( CID_Parser* parser,
- const CID_Field_Rec* field,
- void* object )
- {
- CID_Token_Rec token;
- FT_Byte* cur;
- FT_Byte* limit;
- FT_UInt count;
- FT_UInt index;
- FT_Error error;
-
-
- CID_ToToken( parser, &token );
- if ( !token.type )
- goto Fail;
-
- count = 1;
- index = 0;
- cur = token.start;
- limit = token.limit;
-
- {
- FT_Byte* q = (FT_Byte*)object + 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, 0 );
- 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_Int32*)q = (FT_Int)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 occurred */
- goto Fail;
- }
- }
-
- error = 0;
-
- Exit:
- return error;
-
- Fail:
- error = T1_Err_Invalid_File_Format;
- goto Exit;
- }
-
-
-#define T1_MAX_TABLE_ELEMENTS 32
-
-
- LOCAL_FUNC
- FT_Error CID_Load_Field_Table( CID_Parser* parser,
- const CID_Field_Rec* field,
- void* object )
- {
- CID_Token_Rec elements[T1_MAX_TABLE_ELEMENTS];
- CID_Token_Rec* token;
- FT_Int num_elements;
- FT_Error error = 0;
- FT_Byte* old_cursor;
- FT_Byte* old_limit;
- CID_Field_Rec fieldrec = *(CID_Field_Rec*)field;
-
-
- fieldrec.type = t1_field_integer;
- if ( field->type == t1_field_fixed_array )
- fieldrec.type = t1_field_fixed;
-
- CID_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 */
- if ( field->count_offset )
- *(FT_Byte*)( (FT_Byte*)object + 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;
- CID_Load_Field( parser, &fieldrec, object );
- fieldrec.offset += fieldrec.size;
- }
-
- parser->cursor = old_cursor;
- parser->limit = old_limit;
-
- Exit:
- return error;
-
- Fail:
- error = T1_Err_Invalid_File_Format;
- goto Exit;
- }
-
-
- LOCAL_FUNC
- FT_Long CID_ToInt( CID_Parser* parser )
- {
- return t1_toint( &parser->cursor, parser->limit );
- }
-
-
- LOCAL_FUNC
- FT_Int CID_ToCoordArray( CID_Parser* parser,
- FT_Int max_coords,
- FT_Short* coords )
- {
- return t1_tocoordarray( &parser->cursor, parser->limit,
- max_coords, coords );
- }
-
-
- LOCAL_FUNC
- FT_Int CID_ToFixedArray( CID_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
-
- /* 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;
- }
-
-#endif /* 0 */
-
-
- LOCAL_FUNC
- FT_Error CID_New_Parser( CID_Parser* parser,
- FT_Stream stream,
- FT_Memory memory )
- {
- FT_Error error;
- FT_ULong base_offset, offset, ps_len;
- FT_Byte buffer[256 + 10];
- FT_Int buff_len;
-
-
- MEM_Set( parser, 0, sizeof ( *parser ) );
- parser->stream = stream;
- parser->memory = memory;
-
- base_offset = FILE_Pos();
-
- /* first of all, check the font format in the header */
- if ( ACCESS_Frame( 31 ) )
- goto Exit;
-
- if ( strncmp( (char *)stream->cursor,
- "%!PS-Adobe-3.0 Resource-CIDFont", 31 ) )
- {
- FT_TRACE2(( "[not a valid CID-keyed font]\n" ));
- error = FT_Err_Unknown_File_Format;
- }
-
- FORGET_Frame();
- if ( error )
- goto Exit;
-
- /* now, read the rest of the file, until we find a `StartData' */
- buff_len = 256;
- for (;;)
- {
- FT_Byte *p, *limit = buffer + 256;
-
- /* fill input buffer */
- buff_len -= 256;
- if ( buff_len > 0 )
- MEM_Move( buffer, limit, buff_len );
-
- if ( FILE_Read( buffer, 256 + 10 - buff_len ) )
- goto Exit;
-
- buff_len = 256 + 10;
-
- /* look for `StartData' */
- for ( p = buffer; p < limit; p++ )
- {
- if ( p[0] == 'S' && strncmp( (char*)p, "StartData", 9 ) == 0 )
- {
- /* save offset of binary data after `StartData' */
- offset = FILE_Pos() - ( limit - p ) + 10;
- goto Found;
- }
- }
- }
-
- Found:
- /* we have found the start of the binary data. We will now */
- /* rewind and extract the frame of corresponding to the Postscript */
- /* section */
-
- ps_len = offset - base_offset;
- if ( FILE_Seek( base_offset ) ||
- EXTRACT_Frame( ps_len, parser->postscript ) )
- goto Exit;
-
- parser->data_offset = offset;
- parser->postscript_len = ps_len;
- parser->cursor = parser->postscript;
- parser->limit = parser->cursor + ps_len;
- parser->num_dict = -1;
-
- Exit:
- return error;
- }
-
-
- LOCAL_FUNC
- void CID_Done_Parser( CID_Parser* parser )
- {
- /* always free the private dictionary */
- if ( parser->postscript )
- {
- FT_Stream stream = parser->stream;
-
-
- RELEASE_Frame( parser->postscript );
- }
- }
-
-
-/* END */
git://git.jankratochvil.net / reactos.git / blobdiff