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Make sure that parse_t2_real correctly parses a CFF real number. Added more comments 

to the function.
This commit is contained in:
Tom Kacvinsky 2000-11-22 23:34:56 +00:00
parent ef0af208a0
commit a51b45c607
1 changed files with 29 additions and 12 deletions
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41
src/cff/t2parse.c
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@ -153,7 +153,7 @@
FT_Byte* limit, FT_Byte* limit,
FT_Int power_ten ) FT_Int power_ten )
{ {
FT_Byte* p = ++start; FT_Byte* p = start;
FT_Long num, divider, result, exp; FT_Long num, divider, result, exp;
FT_Int sign = 0, exp_sign = 0; FT_Int sign = 0, exp_sign = 0;
FT_Byte nib; FT_Byte nib;
@ -166,14 +166,20 @@
/* first of all, read the integer part */ /* first of all, read the integer part */
phase = 4; phase = 4;
p--;
for (;;) for (;;)
{ {
/* read one nibble at a time */
if ( phase && ++p >= limit ) /* If we entered this iteration with phase == 4, we need to */
/* read a new byte. This also skips past the intial 0x1E. */
if ( phase )
p++;
/* Make sure we don't read past the end. */
if ( p >= limit )
goto Bad; goto Bad;
/* Get the nibble. */
nib = ( p[0] >> phase ) & 0xF; nib = ( p[0] >> phase ) & 0xF;
phase = 4 - phase; phase = 4 - phase;
@ -189,13 +195,19 @@
if ( nib == 0xa ) if ( nib == 0xa )
for (;;) for (;;)
{ {
/* read one nibble at a time */
if ( !phase && ++p >= limit ) /* If we entered this iteration with phase == 4, we need */
/* to read a new byte. */
if ( phase )
p++;
/* Make sure we don't read past the end. */
if ( p >= limit )
goto Bad; goto Bad;
phase = 4 - phase; /* Get the nibble. */
nib = ( p[0] >> phase ) & 0xF; nib = ( p[0] >> phase ) & 0xF;
phase = 4 - phase;
if ( nib >= 10 ) if ( nib >= 10 )
break; break;
@ -219,13 +231,18 @@
for (;;) for (;;)
{ {
/* read one nibble at a time */ /* If we entered this iteration with phase == 4, we need */
if ( !phase && ++p >= limit ) /* to read a new byte. */
if ( phase )
p++;
/* Make sure we don't read past the end. */
if ( p >= limit )
goto Bad; goto Bad;
phase = 4 - phase; /* Get the nibble. */
nib = ( p[0] >> phase ) & 0xF; nib = ( p[0] >> phase ) & 0xF;
phase = 4 - phase;
if ( nib >= 10 ) if ( nib >= 10 )
break; break;