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breakage.c

#include "tunala.h"

int int_strtoul(const char *str, unsigned long *val)
{
#ifdef HAVE_STRTOUL
      char *tmp;
      unsigned long ret = strtoul(str, &tmp, 10);
      if((str == tmp) || (*tmp != '\0'))
            /* The value didn't parse cleanly */
            return 0;
      if(ret == ULONG_MAX)
            /* We hit a limit */
            return 0;
      *val = ret;
      return 1;
#else
      char buf[2];
      unsigned long ret = 0;
      buf[1] = '\0';
      if(str == '\0')
            /* An empty string ... */
            return 0;
      while(*str != '\0') {
            /* We have to multiply 'ret' by 10 before absorbing the next
             * digit. If this will overflow, catch it now. */
            if(ret && (((ULONG_MAX + 10) / ret) < 10))
                  return 0;
            ret *= 10;
            if(!isdigit(*str))
                  return 0;
            buf[0] = *str;
            ret += atoi(buf);
            str++;
      }
      *val = ret;
      return 1;
#endif
}

#ifndef HAVE_STRSTR
char *int_strstr(const char *haystack, const char *needle)
{
      const char *sub_haystack = haystack, *sub_needle = needle;
      unsigned int offset = 0;
      if(!needle)
            return haystack;
      if(!haystack)
            return NULL;
      while((*sub_haystack != '\0') && (*sub_needle != '\0')) {
            if(sub_haystack[offset] == sub_needle) {
                  /* sub_haystack is still a candidate */
                  offset++;
                  sub_needle++;
            } else {
                  /* sub_haystack is no longer a possibility */
                  sub_haystack++;
                  offset = 0;
                  sub_needle = needle;
            }
      }
      if(*sub_haystack == '\0')
            /* Found nothing */
            return NULL;
      return sub_haystack;
}
#endif

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