ref: 56177261080a288a05fd305e31268c3644777d74
dir: /src/type1/t1parse.c/
#include <freetype/internal/ftdebug.h>
#include <freetype/internal/t1types.h>
#include <t1parse.h>
#include <stdio.h> /* for sscanf */
/*************************************************************************/
/* */
/* <Function> T1_New_Table */
/* */
/* <Description> */
/* Initialise a T1_Table. */
/* */
/* <Input> */
/* table :: address of target table */
/* count :: table size = maximum number of elements */
/* memory :: memory object to use for all subsequent reallocations */
/* */
/* <Return> */
/* Error code. 0 means success */
/* */
LOCAL_FUNC
T1_Error T1_New_Table( T1_Table* table,
T1_Int count,
FT_Memory memory )
{
T1_Error error;
table->memory = memory;
if ( ALLOC_ARRAY( table->elements, count, T1_Byte* ) )
return error;
if ( ALLOC_ARRAY( table->lengths, count, T1_Byte* ) )
{
FREE( table->elements );
return error;
}
table->max_elems = count;
table->num_elems = 0;
table->block = 0;
table->capacity = 0;
table->cursor = 0;
return error;
}
/*************************************************************************/
/* */
/* <Function> T1_Add_Table */
/* */
/* <Description> */
/* Adds an object to a T1_Table, possibly growing its memory block */
/* */
/* <Input> */
/* table :: target table */
/* index :: index of object in table */
/* object :: address of object to copy in memory */
/* length :: length in bytes of source object */
/* */
/* <Return> */
/* Error code. 0 means success. An error is returned when a */
/* realloc failed.. */
/* */
static
T1_Error reallocate_t1_table( T1_Table* table,
T1_Int new_size )
{
FT_Memory memory = table->memory;
T1_Byte* old_base = table->block;
T1_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)
{
T1_Long delta = table->block - old_base;
T1_Byte** offset = table->elements;
T1_Byte** limit = offset + table->max_elems;
if (delta)
for ( ; offset < limit; offset ++ )
if (offset[0])
offset[0] += delta;
}
return T1_Err_Ok;
}
LOCAL_FUNC
T1_Error T1_Add_Table( T1_Table* table,
T1_Int index,
void* object,
T1_Int length )
{
if (index < 0 || index > table->max_elems)
{
FT_ERROR(( "T1.Add_Table: invalid index\n" ));
return T1_Err_Syntax_Error;
}
/* grow the base block if needed */
if ( table->cursor + length > table->capacity )
{
T1_Error error;
T1_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> T1_Done_Table */
/* */
/* <Description> */
/* Finalise a T1_Table. (realloc it to its current cursor). */
/* */
/* <Input> */
/* table :: 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 T1_Done_Table( T1_Table* table )
{
FT_Memory memory = table->memory;
T1_Error error;
T1_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)
{
T1_Long delta = table->block - old_base;
T1_Byte** element = table->elements;
T1_Byte** limit = element + table->max_elems;
for ( ; element < limit; element++ )
if (element[0])
element[0] += delta;
}
}
LOCAL_FUNC
T1_String* CopyString( T1_Parser* parser )
{
T1_String* string = NULL;
T1_Token* token = parser->args++;
FT_Memory memory = parser->tokenizer->memory;
T1_Error error;
if ( token->kind == tok_string )
{
int len = token->len-2;
if ( ALLOC( string, len+1 ) )
{
parser->error = error;
return 0;
}
MEM_Copy( string, parser->tokenizer->base + token->start+1, len );
string[len] = '\0';
parser->error = T1_Err_Ok;
}
else
{
FT_ERROR(( "T1.CopyString : syntax error, string token expected !\n" ));
parser->error = T1_Err_Syntax_Error;
}
return string;
}
static
T1_Error parse_int( T1_Byte* base,
T1_Byte* limit,
T1_Long* result )
{
T1_Bool sign = 0;
T1_Long sum = 0;
if (base >= limit)
goto Fail;
/* check sign */
if ( *base == '+' )
base++;
else if ( *base == '-' )
{
sign++;
base++;
}
/* parse digits */
if ( base >= limit )
goto Fail;
do
{
sum = ( 10*sum + (*base++ - '0') );
} while (base < limit);
if (sign)
sum = -sum;
*result = sum;
return T1_Err_Ok;
Fail:
FT_ERROR(( "T1.parse_integer : integer expected\n" ));
*result = 0;
return T1_Err_Syntax_Error;
}
static
T1_Error parse_float( T1_Byte* base,
T1_Byte* limit,
T1_Int scale,
T1_Long* result )
{
#if 1
/* XXX : We're simply much too lazy to code this function */
/* properly for now.. We'll do that when the rest of */
/* the driver works properly.. */
char temp[32];
int len = limit-base;
double value;
if (len > 31) goto Fail;
strncpy( temp, (char*)base, len );
temp[len] = '\0';
if ( sscanf( temp, "%lf", &value ) != 1 )
goto Fail;
*result = (T1_Long)(scale*value);
return 0;
#else
T1_Byte* cur;
T1_Bool sign = 0; /* sign */
T1_Long number_int = 0; /* integer part */
T1_Long number_frac = 0; /* fractional part */
T1_Long exponent = 0; /* exponent value */
T1_Int num_frac = 0; /* number of fractional digits */
/* check sign */
if (*base == '+')
base++;
else if (*base == '-')
{
sign++;
base++;
}
/* find integer part */
cur = base;
while ( cur < limit )
{
T1_Byte c = *cur;
if ( c == '.' || c == 'e' || c == 'E' )
break;
cur++;
}
if ( cur > base )
{
error = parse_integer( base, cur, &number_int );
if (error) goto Fail;
}
/* read fractional part, if any */
if ( *cur == '.' )
{
cur++;
base = cur;
while ( cur < limit )
{
T1_Byte c = *cur;
if ( c == 'e' || c == 'E' )
break;
cur++;
}
num_frac = cur - base;
if ( cur > base )
{
error = parse_integer( base, cur, &number_frac );
if (error) goto Fail;
base = cur;
}
}
/* read exponent, if any */
if ( *cur == 'e' || *cur == 'E' )
{
cur++;
base = cur;
error = parse_integer( base, limit, &exponent );
if (error) goto Fail;
/* now check that exponent is within 'correct bounds' */
/* i.e. between -6 and 6 */
if ( exponent < -6 || exponent > 6 )
goto Fail;
}
/* now adjust integer value and exponent for fractional part */
while ( num_frac > 0 )
{
number_int *= 10;
exponent --;
num_frac--;
}
number_int += num_frac;
/* skip point if any, read fractional part */
if ( cur+1 < limit )
{
if (*cur
}
/* now compute scaled float value */
/* XXXXX : incomplete !!! */
#endif
Fail:
FT_ERROR(( "T1.parse_float : syntax error !\n" ));
return T1_Err_Syntax_Error;
}
static
T1_Error parse_integer( T1_Byte* base,
T1_Byte* limit,
T1_Long* result )
{
T1_Byte* cur;
/* the lexical analyser accepts floats as well as integers */
/* now, check that we really have an int in this token */
cur = base;
while ( cur < limit )
{
T1_Byte c = *cur++;
if ( c == '.' || c == 'e' || c == 'E' )
goto Float_Number;
}
/* now read the number's value */
return parse_int( base, limit, result );
Float_Number:
/* We really have a float there, simply call parse_float in this */
/* case with a scale of '10' to perform round.. */
{
T1_Error error;
error = parse_float( base, limit, 10, result );
if (!error)
{
if (*result >= 0) *result = (*result+5)/10; /* round value */
else *result = -((5-*result)/10);
}
return error;
}
}
LOCAL_FUNC
T1_Long CopyInteger( T1_Parser* parser )
{
T1_Long sum = 0;
T1_Token* token = parser->args++;
if ( token->kind == tok_number )
{
T1_Byte* base = parser->tokenizer->base + token->start;
T1_Byte* limit = base + token->len;
/* now read the number's value */
parser->error = parse_integer( base, limit, &sum );
return sum;
}
FT_ERROR(( "T1.CopyInteger : number expected\n" ));
parser->args--;
parser->error = T1_Err_Syntax_Error;
return 0;
}
LOCAL_FUNC
T1_Bool CopyBoolean( T1_Parser* parser )
{
T1_Error error = T1_Err_Ok;
T1_Bool result = 0;
T1_Token* token = parser->args++;
if ( token->kind == tok_keyword )
{
if ( token->kind2 == key_false )
result = 0;
else if ( token->kind2 == key_true )
result = !0;
else
goto Fail;
}
else
{
Fail:
FT_ERROR(( "T1.CopyBoolean : syntax error, 'false' or 'true' expected\n" ));
error = T1_Err_Syntax_Error;
}
parser->error = error;
return result;
}
LOCAL_FUNC
T1_Long CopyFloat( T1_Parser* parser,
T1_Int scale )
{
T1_Error error;
T1_Long sum = 0;
T1_Token* token = parser->args++;
if ( token->kind == tok_number )
{
T1_Byte* base = parser->tokenizer->base + token->start;
T1_Byte* limit = base + token->len;
error = parser->error = parse_float( base, limit, scale, &sum );
if (error) goto Fail;
return sum;
}
Fail:
FT_ERROR(( "T1.CopyFloat : syntax error !\n" ));
parser->error = T1_Err_Syntax_Error;
return 0;
}
LOCAL_FUNC
void CopyBBox( T1_Parser* parser,
T1_BBox* bbox )
{
T1_Token* token = parser->args++;
T1_Int n;
T1_Error error;
if ( token->kind == tok_program ||
token->kind == tok_array )
{
/* get rid of '['/']', or '{'/'}' */
T1_Byte* base = parser->tokenizer->base + token->start + 1;
T1_Byte* limit = base + token->len - 2;
T1_Byte* cur;
T1_Byte* start;
/* read each parameter independently */
cur = base;
for ( n = 0; n < 4; n++ )
{
T1_Long* result;
/* skip whitespace */
while (cur < limit && *cur == ' ') cur++;
/* skip numbers */
start = cur;
while (cur < limit && *cur != ' ') cur++;
/* compute result address */
switch (n)
{
case 0 : result = &bbox->xMin; break;
case 1 : result = &bbox->yMin; break;
case 2 : result = &bbox->xMax; break;
default: result = &bbox->yMax;
}
error = parse_integer( start, cur, result );
if (error) goto Fail;
}
parser->error = 0;
return;
}
Fail:
FT_ERROR(( "T1.CopyBBox : syntax error !\n" ));
parser->error = T1_Err_Syntax_Error;
}
LOCAL_FUNC
void CopyMatrix( T1_Parser* parser,
T1_Matrix* matrix )
{
T1_Token* token = parser->args++;
T1_Error error;
if ( token->kind == tok_array )
{
/* get rid of '[' and ']' */
T1_Byte* base = parser->tokenizer->base + token->start + 1;
T1_Byte* limit = base + token->len - 2;
T1_Byte* cur;
T1_Byte* start;
T1_Int n;
/* read each parameter independently */
cur = base;
for ( n = 0; n < 4; n++ )
{
T1_Long* result;
/* skip whitespace */
while (cur < limit && *cur == ' ') cur++;
/* skip numbers */
start = cur;
while (cur < limit && *cur != ' ') cur++;
/* compute result address */
switch (n)
{
case 0 : result = &matrix->xx; break;
case 1 : result = &matrix->yx; break;
case 2 : result = &matrix->xy; break;
default: result = &matrix->yy;
}
error = parse_float( start, cur, 65536000, result );
if (error) goto Fail;
}
parser->error = 0;
return;
}
Fail:
FT_ERROR(( "T1.CopyMatrix : syntax error !\n" ));
parser->error = T1_Err_Syntax_Error;
}
LOCAL_FUNC
void CopyArray( T1_Parser* parser,
T1_Byte* num_elements,
T1_Short* elements,
T1_Int max_elements )
{
T1_Token* token = parser->args++;
T1_Error error;
if ( token->kind == tok_array ||
token->kind == tok_program ) /* in the case of MinFeature */
{
/* get rid of '['/']', or '{'/'}' */
T1_Byte* base = parser->tokenizer->base + token->start + 1;
T1_Byte* limit = base + token->len - 2;
T1_Byte* cur;
T1_Byte* start;
T1_Int n;
/* read each parameter independently */
cur = base;
for ( n = 0; n < max_elements; n++ )
{
T1_Long result;
/* test end of string */
if (cur >= limit)
break;
/* skip whitespace */
while (cur < limit && *cur == ' ') cur++;
/* end of list ? */
if (cur >= limit)
break;
/* skip numbers */
start = cur;
while (cur < limit && *cur != ' ') cur++;
error = parse_integer( start, cur, &result );
if (error) goto Fail;
*elements ++ = (T1_Short)result;
}
if (num_elements)
*num_elements = (T1_Byte)n;
parser->error = 0;
return;
}
Fail:
FT_ERROR(( "T1.CopyArray : syntax error !\n" ));
parser->error = T1_Err_Syntax_Error;
}