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https://github.com/s3fs-fuse/s3fs-fuse.git
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Use std::get_time instead in strptime polyfill
This commit is contained in:
Naoki Ikeguchi
Andrew Gaul
parent
d95a612548
commit
3ac9f571f5
234
src/strptime.cpp
234
src/strptime.cpp
@ -1,233 +1,23 @@
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/*
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* Polyfill for strptime function
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*
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* This source code is from musl library, located at https://git.musl-libc.org/cgit/musl/tree/src/time/strptime.c .
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* This source code is from https://gist.github.com/jeremyfromearth/5694aa3a66714254752179ecf3c95582 .
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*/
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/*
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* musl as a whole is licensed under the following standard MIT license:
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*
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* ----------------------------------------------------------------------
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* Copyright © 2005-2020 Rich Felker, et al.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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* ----------------------------------------------------------------------
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*/
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#include <iostream>
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#include <time.h>
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#include <iomanip>
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#include <sstream>
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#include "strptime.h"
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char* strptime(const char* s, const char* f, struct tm* tm)
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{
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int i, w, neg, adj, min, range, *dest, dummy;
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const char *ex;
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size_t len;
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int want_century = 0, century = 0, relyear = 0;
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while (*f) {
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if (*f != '%') {
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if (isspace(*f)) for (; *s && isspace(*s); s++);
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else if (*s != *f) return 0;
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else s++;
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f++;
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continue;
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}
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f++;
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if (*f == '+') f++;
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if (isdigit(*f)) {
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char *new_f;
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w=strtoul(f, &new_f, 10);
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f = new_f;
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} else {
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w=-1;
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}
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adj=0;
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switch (*f++) {
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case 'a': case 'A':
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dest = &tm->tm_wday;
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min = ABDAY_1;
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range = 7;
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goto symbolic_range;
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case 'b': case 'B': case 'h':
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dest = &tm->tm_mon;
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min = ABMON_1;
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range = 12;
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goto symbolic_range;
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case 'c':
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s = strptime(s, nl_langinfo(D_T_FMT), tm);
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if (!s) return 0;
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break;
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case 'C':
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dest = ¢ury;
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if (w<0) w=2;
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want_century |= 2;
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goto numeric_digits;
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case 'd': case 'e':
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dest = &tm->tm_mday;
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min = 1;
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range = 31;
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goto numeric_range;
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case 'D':
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s = strptime(s, "%m/%d/%y", tm);
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if (!s) return 0;
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break;
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case 'H':
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dest = &tm->tm_hour;
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min = 0;
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range = 24;
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goto numeric_range;
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case 'I':
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dest = &tm->tm_hour;
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min = 1;
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range = 12;
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goto numeric_range;
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case 'j':
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dest = &tm->tm_yday;
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min = 1;
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range = 366;
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adj = 1;
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goto numeric_range;
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case 'm':
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dest = &tm->tm_mon;
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min = 1;
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range = 12;
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adj = 1;
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goto numeric_range;
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case 'M':
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dest = &tm->tm_min;
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min = 0;
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range = 60;
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goto numeric_range;
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case 'n': case 't':
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for (; *s && isspace(*s); s++);
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break;
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case 'p':
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ex = nl_langinfo(AM_STR);
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len = strlen(ex);
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if (!strncasecmp(s, ex, len)) {
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tm->tm_hour %= 12;
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s += len;
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break;
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}
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ex = nl_langinfo(PM_STR);
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len = strlen(ex);
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if (!strncasecmp(s, ex, len)) {
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tm->tm_hour %= 12;
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tm->tm_hour += 12;
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s += len;
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break;
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}
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return 0;
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case 'r':
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s = strptime(s, nl_langinfo(T_FMT_AMPM), tm);
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if (!s) return 0;
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break;
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case 'R':
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s = strptime(s, "%H:%M", tm);
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if (!s) return 0;
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break;
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case 'S':
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dest = &tm->tm_sec;
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min = 0;
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range = 61;
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goto numeric_range;
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case 'T':
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s = strptime(s, "%H:%M:%S", tm);
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if (!s) return 0;
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break;
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case 'U':
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case 'W':
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/* Throw away result, for now. (FIXME?) */
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dest = &dummy;
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min = 0;
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range = 54;
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goto numeric_range;
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case 'w':
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dest = &tm->tm_wday;
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min = 0;
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range = 7;
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goto numeric_range;
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case 'x':
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s = strptime(s, nl_langinfo(D_FMT), tm);
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if (!s) return 0;
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break;
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case 'X':
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s = strptime(s, nl_langinfo(T_FMT), tm);
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if (!s) return 0;
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break;
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case 'y':
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dest = &relyear;
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w = 2;
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want_century |= 1;
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goto numeric_digits;
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case 'Y':
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dest = &tm->tm_year;
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if (w<0) w=4;
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adj = 1900;
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want_century = 0;
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goto numeric_digits;
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case '%':
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if (*s++ != '%') return 0;
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break;
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default:
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return 0;
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numeric_range:
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if (!isdigit(*s)) return 0;
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*dest = 0;
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for (i=1; i<=min+range && isdigit(*s); i*=10)
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*dest = *dest * 10 + *s++ - '0';
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if ((unsigned)(*dest - min) >= (unsigned)range) return 0;
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*dest -= adj;
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switch((char *)dest - (char *)tm) {
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case offsetof(struct tm, tm_yday):
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;
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}
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goto update;
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numeric_digits:
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neg = 0;
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if (*s == '+') s++;
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else if (*s == '-') neg=1, s++;
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if (!isdigit(*s)) return 0;
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for (*dest=i=0; i<w && isdigit(*s); i++)
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*dest = *dest * 10 + *s++ - '0';
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if (neg) *dest = -*dest;
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*dest -= adj;
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goto update;
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symbolic_range:
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for (i=0; i < range; i++) {
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ex = nl_langinfo(min+i);
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len = strlen(ex);
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if (strncasecmp(s, ex, len)) continue;
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s += len;
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*dest = i % range;
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break;
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}
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if (i<0) return 0;
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goto update;
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update:
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//FIXME
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;
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}
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}
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if (want_century) {
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tm->tm_year = relyear;
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if (want_century & 2) tm->tm_year += century * 100 - 1900;
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else if (tm->tm_year <= 68) tm->tm_year += 100;
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}
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return (char *)s;
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std::istringstream input(s);
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input.imbue(std::locale(setlocale(LC_ALL, nullptr)));
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input >> std::get_time(tm, f);
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if (input.fail()) {
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return nullptr;
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}
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return (char*)(s + input.tellg());
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}
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