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6c0c23cb53
- Sync with trunk head (r50270) - This also reverts r49298. svn path=/branches/cmake-bringup/; revision=50271
67 lines
1.2 KiB
C
67 lines
1.2 KiB
C
#include <precomp.h>
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__int64
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_strtoi64(const char *nptr, char **endptr, int base)
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{
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BOOL negative = FALSE;
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__int64 ret = 0;
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while(isspace(*nptr)) nptr++;
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if(*nptr == '-') {
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negative = TRUE;
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nptr++;
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} else if(*nptr == '+')
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nptr++;
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if((base==0 || base==16) && *nptr=='0' && tolower(*(nptr+1))=='x') {
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base = 16;
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nptr += 2;
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}
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if(base == 0) {
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if(*nptr=='0')
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base = 8;
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else
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base = 10;
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}
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while(*nptr) {
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char cur = tolower(*nptr);
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int v;
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if(isdigit(cur)) {
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if(cur >= '0'+base)
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break;
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v = cur-'0';
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} else {
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if(cur<'a' || cur>='a'+base-10)
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break;
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v = cur-'a'+10;
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}
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if(negative)
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v = -v;
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nptr++;
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if(!negative && (ret>_I64_MAX/base || ret*base>_I64_MAX-v)) {
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ret = _I64_MAX;
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*_errno() = ERANGE;
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} else if(negative && (ret<_I64_MIN/base || ret*base<_I64_MIN-v)) {
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ret = _I64_MIN;
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*_errno() = ERANGE;
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} else
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ret = ret*base + v;
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}
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if(endptr)
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*endptr = (char*)nptr;
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return ret;
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}
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/* EOF */
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