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-rw-r--r--cache.h1
-rw-r--r--date.c124
-rw-r--r--rev-parse.c15
3 files changed, 126 insertions, 14 deletions
diff --git a/cache.h b/cache.h
index 08461cf..99afa2c 100644
--- a/cache.h
+++ b/cache.h
@@ -259,6 +259,7 @@ extern void *read_object_with_reference(const unsigned char *sha1,
const char *show_date(unsigned long time, int timezone);
int parse_date(const char *date, char *buf, int bufsize);
void datestamp(char *buf, int bufsize);
+unsigned long approxidate(const char *);
extern int setup_ident(void);
extern char *get_ident(const char *name, const char *email, const char *date_str);
diff --git a/date.c b/date.c
index 63f5a09..73c063b 100644
--- a/date.c
+++ b/date.c
@@ -5,6 +5,7 @@
*/
#include <time.h>
+#include <sys/time.h>
#include "cache.h"
@@ -460,3 +461,126 @@ void datestamp(char *buf, int bufsize)
date_string(now, offset, buf, bufsize);
}
+
+static void update_tm(struct tm *tm, unsigned long sec)
+{
+ time_t n = mktime(tm) - sec;
+ localtime_r(&n, tm);
+}
+
+static const char *number_name[] = {
+ "zero", "one", "two", "three", "four",
+ "five", "six", "seven", "eight", "nine", "ten",
+};
+
+static struct typelen {
+ const char *type;
+ int length;
+} typelen[] = {
+ { "seconds", 1 },
+ { "minutes", 60 },
+ { "hours", 60*60 },
+ { "days", 24*60*60 },
+ { "weeks", 7*24*60*60 },
+ { NULL }
+};
+
+static const char *approxidate_alpha(const char *date, struct tm *tm, int *num)
+{
+ struct typelen *tl;
+ const char *end = date;
+ int n = 1, i;
+
+ while (isalpha(*++end))
+ n++;
+
+ for (i = 0; i < 12; i++) {
+ int match = match_string(date, month_names[i]);
+ if (match >= 3) {
+ tm->tm_mon = i;
+ return end;
+ }
+ }
+
+ if (match_string(date, "yesterday") > 8) {
+ update_tm(tm, 24*60*60);
+ return end;
+ }
+
+ if (!*num) {
+ for (i = 1; i < 11; i++) {
+ int len = strlen(number_name[i]);
+ if (match_string(date, number_name[i]) == len) {
+ *num = i;
+ return end;
+ }
+ }
+ if (match_string(date, "last") == 4)
+ *num = 1;
+ return end;
+ }
+
+ tl = typelen;
+ while (tl->type) {
+ int len = strlen(tl->type);
+ if (match_string(date, tl->type) >= len-1) {
+ update_tm(tm, tl->length * *num);
+ *num = 0;
+ return end;
+ }
+ tl++;
+ }
+
+ if (match_string(date, "months") >= 5) {
+ int n = tm->tm_mon - *num;
+ *num = 0;
+ while (n < 0) {
+ n += 12;
+ tm->tm_year--;
+ }
+ tm->tm_mon = n;
+ return end;
+ }
+
+ if (match_string(date, "years") >= 4) {
+ tm->tm_year -= *num;
+ *num = 0;
+ return end;
+ }
+
+ return end;
+}
+
+unsigned long approxidate(const char *date)
+{
+ int number = 0;
+ struct tm tm, now;
+ struct timeval tv;
+ char buffer[50];
+
+ if (parse_date(date, buffer, sizeof(buffer)) > 0)
+ return strtoul(buffer, NULL, 10);
+
+ gettimeofday(&tv, NULL);
+ localtime_r(&tv.tv_sec, &tm);
+ now = tm;
+ for (;;) {
+ unsigned char c = *date;
+ if (!c)
+ break;
+ date++;
+ if (isdigit(c)) {
+ char *end;
+ number = strtoul(date-1, &end, 10);
+ date = end;
+ continue;
+ }
+ if (isalpha(c))
+ date = approxidate_alpha(date-1, &tm, &number);
+ }
+ if (number > 0 && number < 32)
+ tm.tm_mday = number;
+ if (tm.tm_mon > now.tm_mon)
+ tm.tm_year--;
+ return mktime(&tm);
+}
diff --git a/rev-parse.c b/rev-parse.c
index 5a98982..bb4949a 100644
--- a/rev-parse.c
+++ b/rev-parse.c
@@ -131,25 +131,12 @@ static int show_reference(const char *refname, const unsigned char *sha1)
static void show_datestring(const char *flag, const char *datestr)
{
- FILE *date;
static char buffer[100];
- static char cmd[1000];
- int len;
/* date handling requires both flags and revs */
if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
return;
- len = strlen(flag);
- memcpy(buffer, flag, len);
-
- snprintf(cmd, sizeof(cmd), "date --date=%s +%%s", sq_quote(datestr));
- date = popen(cmd, "r");
- if (!date || !fgets(buffer + len, sizeof(buffer) - len, date))
- die("git-rev-list: bad date string");
- pclose(date);
- len = strlen(buffer);
- if (buffer[len-1] == '\n')
- buffer[--len] = 0;
+ snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr));
show(buffer);
}