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1c5aec60bb
TO_DATE()
and PgSQL extension FROM_CHAR().
TO_CHAR() routine allow formating text output with a datetime values:
SELECT TO_CHAR('now'::datetime, '"Now is: "HH24:MI:SS');
to_char
----------------
Now is: 21:04:10
FROM_CHAR() routine allow convert text to a datetime:
SELECT FROM_CHAR('September 1999 10:20:30', 'FMMonth YYYY
HH:MI:SS');
from_char
-----------------------------
Wed Sep 01 10:20:30 1999 CEST
TO_DATE() is equal with FROM_CHAR(), but output a Date only:
SELECT TO_DATE('September 1999 10:20:30', 'FMMonth YYYY
HH:MI:SS');
to_date
----------
09-01-1999
In attache is compressed dir for the contrib. All is prepared, but I'am
not
sure if Makefile is good (probably yes).
Comments & suggestions ?
Thomas, thank you for your good advices.
Karel
------------------------------------------------------------------------------
Karel Zak <zakkr@zf.jcu.cz>
http://home.zf.jcu.cz/~zakkr/
71 lines
1.1 KiB
C
71 lines
1.1 KiB
C
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#include <stdio.h>
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#include <errno.h>
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#include <ctype.h>
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#include <stdlib.h>
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char *month[] = {
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"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec",NULL
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};
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char *day[] = { "Sun","Mon","Tue","Wed","Thu","Fri","Sat", NULL };
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int num(FILE *f, int min, int max)
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{
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int x, y, one;
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one = x = fgetc(f);
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if (x < min)
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x = min;
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else if (x > max) {
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while(x > max)
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x /= 2;
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return x;
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}
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do {
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y = fgetc(f);
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if ((x+y) > max)
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return x;
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x += y;
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} while(--one > 0);
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return x;
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}
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int main(int argc, char **argv)
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{
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FILE *f;
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int count;
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if (argc < 5) {
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printf("\nUsage: %s <randfile> <num> <prefix> <postfix>\n", argv[0]);
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printf("\n(C) Karel Zak - Zakkr 1999\n\n");
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exit(1);
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}
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if ((f = fopen(argv[1], "r")) == NULL) {
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perror(argv[1]);
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exit(1);
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}
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count = atoi(argv[2]);
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for(; count > 0; --count) {
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fprintf(stdout, "%s%s %02d %s %02d:%02d:%02d %d%s\n",
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argv[3],
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day[ num(f, 0, 6) ],
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num(f, 1, 28),
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month[ num(f, 0, 11) ],
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num(f, 0, 23),
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num(f, 0, 59),
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num(f, 0, 59),
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num(f, 0, 9999),
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argv[4]
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);
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}
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exit(0);
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} |