[PATCH] Do date parsing by hand...
...since everything out there is either strange (libc mktime has issues with timezones) or introduces unnecessary dependencies for people (libcurl). This goes back to the old date parsing, but moves it out into a file of its own, and does the "struct tm" to "seconds since epoch" handling by hand. I grepped through the tz-database and it seems there's one "country" left that has non-60-minute DST: Lord Howe Island. All others dropped that before 1970.
This commit is contained in:
Edgar Toernig
Linus Torvalds
parent
d167f147dc
commit
ecee9d9e79
4
Makefile
4
Makefile
@ -28,7 +28,8 @@ all: $(PROG)
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install: $(PROG) $(SCRIPTS)
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install $(PROG) $(SCRIPTS) $(HOME)/bin/
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LIB_OBJS=read-cache.o sha1_file.o usage.o object.o commit.o tree.o blob.o tag.o
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LIB_OBJS=read-cache.o sha1_file.o usage.o object.o commit.o tree.o blob.o \
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tag.o date.o
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LIB_FILE=libgit.a
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LIB_H=cache.h object.h blob.h tree.h commit.h tag.h
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@ -91,7 +92,6 @@ git-diff-tree-helper: diff-tree-helper.c
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git-tar-tree: tar-tree.c
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git-http-pull: LIBS += -lcurl
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git-commit-tree: LIBS += -lcurl
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# Library objects..
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blob.o: $(LIB_H)
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3
cache.h
3
cache.h
@ -148,6 +148,9 @@ extern void *read_object_with_reference(const unsigned char *sha1,
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unsigned long *size,
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unsigned char *sha1_ret);
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void parse_date(char *date, char *buf, int bufsize);
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void datestamp(char *buf, int bufsize);
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static inline void *xmalloc(int size)
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{
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void *ret = malloc(size);
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@ -10,7 +10,6 @@
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#include <string.h>
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#include <ctype.h>
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#include <time.h>
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#include <curl/curl.h>
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#define BLOCKING (1ul << 14)
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@ -81,24 +80,6 @@ static void remove_special(char *p)
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}
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}
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/* Gr. strptime is crap for this; it doesn't have a way to require RFC2822
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(i.e. English) day/month names, and it doesn't work correctly with %z. */
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static void parse_date(char *date, time_t *now, char *result, int maxlen)
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{
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char *p;
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time_t then;
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if ((then = curl_getdate(date, now)) == 0)
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return;
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/* find the timezone at the end */
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p = date + strlen(date);
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while (p > date && isdigit(*--p))
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;
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if ((*p == '+' || *p == '-') && strlen(p) == 5)
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snprintf(result, maxlen, "%lu %5.5s", then, p);
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}
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static void check_valid(unsigned char *sha1, const char *expect)
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{
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void *buf;
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@ -132,8 +113,6 @@ int main(int argc, char **argv)
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char *audate;
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char comment[1000];
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struct passwd *pw;
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time_t now;
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struct tm *tm;
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char *buffer;
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unsigned int size;
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@ -163,10 +142,8 @@ int main(int argc, char **argv)
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strcat(realemail, ".");
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getdomainname(realemail+strlen(realemail), sizeof(realemail)-strlen(realemail)-1);
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}
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time(&now);
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tm = localtime(&now);
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strftime(realdate, sizeof(realdate), "%s %z", tm);
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datestamp(realdate, sizeof(realdate));
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strcpy(date, realdate);
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commitgecos = getenv("COMMIT_AUTHOR_NAME") ? : realgecos;
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@ -175,7 +152,7 @@ int main(int argc, char **argv)
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email = getenv("AUTHOR_EMAIL") ? : realemail;
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audate = getenv("AUTHOR_DATE");
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if (audate)
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parse_date(audate, &now, date, sizeof(date));
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parse_date(audate, date, sizeof(date));
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remove_special(gecos); remove_special(realgecos); remove_special(commitgecos);
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remove_special(email); remove_special(realemail); remove_special(commitemail);
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184
date.c
Normal file
184
date.c
Normal file
@ -0,0 +1,184 @@
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/*
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* GIT - The information manager from hell
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*
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* Copyright (C) Linus Torvalds, 2005
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <time.h>
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static time_t my_mktime(struct tm *tm)
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{
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static const int mdays[] = {
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0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
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};
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int year = tm->tm_year - 70;
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int month = tm->tm_mon;
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int day = tm->tm_mday;
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if (year < 0 || year > 129) /* algo only works for 1970-2099 */
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return -1;
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if (month < 0 || month > 11) /* array bounds */
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return -1;
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if (month < 2 || (year + 2) % 4)
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day--;
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return (year * 365 + (year + 1) / 4 + mdays[month] + day) * 24*60*60UL +
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tm->tm_hour * 60*60 + tm->tm_min * 60 + tm->tm_sec;
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}
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static const char *month_names[] = {
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"Jan", "Feb", "Mar", "Apr", "May", "Jun",
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"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
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};
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static const char *weekday_names[] = {
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"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
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};
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static char *skipfws(char *str)
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{
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while (isspace(*str))
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str++;
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return str;
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}
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/* Gr. strptime is crap for this; it doesn't have a way to require RFC2822
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(i.e. English) day/month names, and it doesn't work correctly with %z. */
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void parse_date(char *date, char *result, int maxlen)
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{
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struct tm tm;
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char *p, *tz;
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int i, offset;
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time_t then;
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memset(&tm, 0, sizeof(tm));
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/* Skip day-name */
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p = skipfws(date);
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if (!isdigit(*p)) {
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for (i=0; i<7; i++) {
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if (!strncmp(p,weekday_names[i],3) && p[3] == ',') {
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p = skipfws(p+4);
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goto day;
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}
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}
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return;
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}
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/* day */
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day:
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tm.tm_mday = strtoul(p, &p, 10);
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if (tm.tm_mday < 1 || tm.tm_mday > 31)
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return;
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if (!isspace(*p))
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return;
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p = skipfws(p);
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/* month */
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for (i=0; i<12; i++) {
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if (!strncmp(p, month_names[i], 3) && isspace(p[3])) {
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tm.tm_mon = i;
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p = skipfws(p+strlen(month_names[i]));
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goto year;
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}
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}
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return; /* Error -- bad month */
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/* year */
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year:
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tm.tm_year = strtoul(p, &p, 10);
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if (!tm.tm_year && !isspace(*p))
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return;
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if (tm.tm_year > 1900)
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tm.tm_year -= 1900;
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p=skipfws(p);
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/* hour */
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if (!isdigit(*p))
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return;
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tm.tm_hour = strtoul(p, &p, 10);
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if (tm.tm_hour > 23)
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return;
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if (*p != ':')
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return; /* Error -- bad time */
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p++;
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/* minute */
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if (!isdigit(*p))
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return;
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tm.tm_min = strtoul(p, &p, 10);
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if (tm.tm_min > 59)
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return;
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if (*p != ':')
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goto zone;
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p++;
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/* second */
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if (!isdigit(*p))
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return;
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tm.tm_sec = strtoul(p, &p, 10);
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if (tm.tm_sec > 60)
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return;
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zone:
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if (!isspace(*p))
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return;
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p = skipfws(p);
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if (*p == '-')
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offset = -60;
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else if (*p == '+')
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offset = 60;
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else
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return;
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if (!isdigit(p[1]) || !isdigit(p[2]) || !isdigit(p[3]) || !isdigit(p[4]))
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return;
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tz = p;
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i = strtoul(p+1, NULL, 10);
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offset *= ((i % 100) + ((i / 100) * 60));
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p = skipfws(p + 5);
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if (*p && *p != '(') /* trailing comment like (EDT) is ok */
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return;
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then = my_mktime(&tm); /* mktime uses local timezone */
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if (then == -1)
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return;
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then -= offset;
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snprintf(result, maxlen, "%lu %5.5s", then, tz);
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}
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void datestamp(char *buf, int bufsize)
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{
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time_t now;
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int offset;
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time(&now);
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offset = my_mktime(localtime(&now)) - now;
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offset /= 60;
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snprintf(buf, bufsize, "%lu %+05d", now, offset/60*100 + offset%60);
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}
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