/[pcre]/code/trunk/pcre_compile.c
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revision 504 by ph10, Mon Mar 8 08:57:04 2010 UTC revision 505 by ph10, Tue Mar 9 16:50:47 2010 UTC
# Line 92  is 4 there is plenty of room. */ Line 92  is 4 there is plenty of room. */
92    
93  #define COMPILE_WORK_SIZE (4096)  #define COMPILE_WORK_SIZE (4096)
94    
95    /* The overrun tests check for a slightly smaller size so that they detect the
96    overrun before it actually does run off the end of the data block. */
97    
98    #define WORK_SIZE_CHECK (COMPILE_WORK_SIZE - 100)
99    
100    
101  /* Table for handling escaped characters in the range '0'-'z'. Positive returns  /* Table for handling escaped characters in the range '0'-'z'. Positive returns
102  are simple data values; negative values are for special things like \d and so  are simple data values; negative values are for special things like \d and so
# Line 2760  for (;; ptr++) Line 2765  for (;; ptr++)
2765  #ifdef PCRE_DEBUG  #ifdef PCRE_DEBUG
2766      if (code > cd->hwm) cd->hwm = code;                 /* High water info */      if (code > cd->hwm) cd->hwm = code;                 /* High water info */
2767  #endif  #endif
2768      if (code > cd->start_workspace + COMPILE_WORK_SIZE) /* Check for overrun */      if (code > cd->start_workspace + WORK_SIZE_CHECK)   /* Check for overrun */
2769        {        {
2770        *errorcodeptr = ERR52;        *errorcodeptr = ERR52;
2771        goto FAILED;        goto FAILED;
# Line 2809  for (;; ptr++) Line 2814  for (;; ptr++)
2814    /* In the real compile phase, just check the workspace used by the forward    /* In the real compile phase, just check the workspace used by the forward
2815    reference list. */    reference list. */
2816    
2817    else if (cd->hwm > cd->start_workspace + COMPILE_WORK_SIZE)    else if (cd->hwm > cd->start_workspace + WORK_SIZE_CHECK)
2818      {      {
2819      *errorcodeptr = ERR52;      *errorcodeptr = ERR52;
2820      goto FAILED;      goto FAILED;

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