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86 lines
1.8 KiB
C
86 lines
1.8 KiB
C
#include "scan.h"
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#include "byte.h"
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#include "case.h"
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#define _GNU_SOURCE
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#define __deprecated__
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#include <time.h>
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#include <stdlib.h>
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#ifdef sgi
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extern char** environ;
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#endif
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static int parsetime(const char*c,struct tm* x) {
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unsigned long tmp;
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c+=scan_ulong(c,&tmp); x->tm_hour=tmp;
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if (*c!=':') return -1; ++c;
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c+=scan_ulong(c,&tmp); x->tm_min=tmp;
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if (*c!=':') return -1; ++c;
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c+=scan_ulong(c,&tmp); x->tm_sec=tmp;
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if (*c!=' ') return -1;
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return 0;
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}
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size_t scan_httpdate(const char *in,time_t *t) {
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struct tm x;
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int i;
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unsigned long tmp;
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const char* c;
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static const char months[] = "JanFebMarAprMayJunJulAugSepOctNovDec";
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if (!(c=in)) return 0;
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if (c[3]==',') c+=5; else
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if (c[6]==',') c+=8; else {
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c+=4;
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for (i=0; i<12; ++i) {
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if (case_equalb(c,3,months+i*3)) {
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x.tm_mon=i; break;
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}
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}
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c+=4; if (*c==' ') ++c;
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c+=scan_ulong(c,&tmp); x.tm_mday=tmp;
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++c;
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if (parsetime(c,&x)) return 0;
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c+=9;
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c+=scan_ulong(c,&tmp); x.tm_year=tmp-1900;
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goto done;
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}
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c+=scan_ulong(c,&tmp); x.tm_mday=tmp;
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++c;
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for (i=0; i<12; ++i)
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if (case_equalb(c,3,months+i*3)) {
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x.tm_mon=i; break;
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}
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c+=4;
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c+=scan_ulong(c,&tmp);
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if (tmp>1000) x.tm_year=tmp-1900; else
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if (tmp<70) x.tm_year=tmp+100; else
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x.tm_year=tmp;
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++c;
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if (parsetime(c,&x)) return 0;
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c+=9;
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if (byte_equal(c,3,"GMT")) c+=3;
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done:
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x.tm_wday=x.tm_yday=x.tm_isdst=0;
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#if defined(__dietlibc__) || defined(__GLIBC__)
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*t=timegm(&x);
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#elif defined(__MINGW32__)
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*t=mktime(&x);
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#else
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{
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#ifdef sgi
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char** old=environ;
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char** newenv={0};
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environ=newenv;
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*t=mktime(&x);
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environ=old;
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#else
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char* old=getenv("TZ");
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unsetenv("TZ");
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*t=mktime(&x);
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if (old) setenv("TZ",old,1);
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#endif
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}
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#endif
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return c-in;
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}
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