|
/* -*- c-file-style: "linux" -*- */ |
|
|
|
/* |
|
* strftime.c |
|
* |
|
* Public-domain implementation of ANSI C library routine. |
|
* |
|
* It's written in old-style C for maximal portability. |
|
* However, since I'm used to prototypes, I've included them too. |
|
* |
|
* If you want stuff in the System V ascftime routine, add the SYSV_EXT define. |
|
* For extensions from SunOS, add SUNOS_EXT. |
|
* For stuff needed to implement the P1003.2 date command, add POSIX2_DATE. |
|
* For VMS dates, add VMS_EXT. |
|
* For a an RFC822 time format, add MAILHEADER_EXT. |
|
* For ISO week years, add ISO_DATE_EXT. |
|
* For complete POSIX semantics, add POSIX_SEMANTICS. |
|
* |
|
* The code for %c, %x, and %X now follows the 1003.2 specification for |
|
* the POSIX locale. |
|
* This version ignores LOCALE information. |
|
* It also doesn't worry about multi-byte characters. |
|
* So there. |
|
* |
|
* This file is also shipped with GAWK (GNU Awk), gawk specific bits of |
|
* code are included if GAWK is defined. |
|
* |
|
* Arnold Robbins |
|
* January, February, March, 1991 |
|
* Updated March, April 1992 |
|
* Updated April, 1993 |
|
* Updated February, 1994 |
|
* Updated May, 1994 |
|
* Updated January, 1995 |
|
* Updated September, 1995 |
|
* Updated January, 1996 |
|
* |
|
* Fixes from ado@elsie.nci.nih.gov |
|
* February 1991, May 1992 |
|
* Fixes from Tor Lillqvist tml@tik.vtt.fi |
|
* May, 1993 |
|
* Further fixes from ado@elsie.nci.nih.gov |
|
* February 1994 |
|
* %z code from chip@chinacat.unicom.com |
|
* Applied September 1995 |
|
* %V code fixed (again) and %G, %g added, |
|
* January 1996 |
|
*/ |
|
|
|
#include "ruby/ruby.h" |
|
#include "ruby/encoding.h" |
|
#include "timev.h" |
|
#include "internal.h" |
|
|
|
#ifndef GAWK |
|
#include <stdio.h> |
|
#include <ctype.h> |
|
#include <string.h> |
|
#include <time.h> |
|
#include <sys/types.h> |
|
#include <errno.h> |
|
#endif |
|
#if defined(TM_IN_SYS_TIME) || !defined(GAWK) |
|
#include <sys/types.h> |
|
#if HAVE_SYS_TIME_H |
|
#include <sys/time.h> |
|
#endif |
|
#endif |
|
#include <math.h> |
|
|
|
/* defaults: season to taste */ |
|
#define SYSV_EXT 1 /* stuff in System V ascftime routine */ |
|
#define SUNOS_EXT 1 /* stuff in SunOS strftime routine */ |
|
#define POSIX2_DATE 1 /* stuff in Posix 1003.2 date command */ |
|
#define VMS_EXT 1 /* include %v for VMS date format */ |
|
#define MAILHEADER_EXT 1 /* add %z for HHMM format */ |
|
#define ISO_DATE_EXT 1 /* %G and %g for year of ISO week */ |
|
|
|
#if defined(ISO_DATE_EXT) |
|
#if ! defined(POSIX2_DATE) |
|
#define POSIX2_DATE 1 |
|
#endif |
|
#endif |
|
|
|
#if defined(POSIX2_DATE) |
|
#if ! defined(SYSV_EXT) |
|
#define SYSV_EXT 1 |
|
#endif |
|
#if ! defined(SUNOS_EXT) |
|
#define SUNOS_EXT 1 |
|
#endif |
|
#endif |
|
|
|
#if defined(POSIX2_DATE) |
|
#define adddecl(stuff) stuff |
|
#else |
|
#define adddecl(stuff) |
|
#endif |
|
|
|
#undef strchr /* avoid AIX weirdness */ |
|
|
|
#if !defined __STDC__ && !defined _WIN32 |
|
#define const /**/ |
|
static int weeknumber(); |
|
adddecl(static int iso8601wknum();) |
|
static int weeknumber_v(); |
|
adddecl(static int iso8601wknum_v();) |
|
#else |
|
static int weeknumber(const struct tm *timeptr, int firstweekday); |
|
adddecl(static int iso8601wknum(const struct tm *timeptr);) |
|
static int weeknumber_v(const struct vtm *vtm, int firstweekday); |
|
adddecl(static int iso8601wknum_v(const struct vtm *vtm);) |
|
#endif |
|
|
|
#ifdef STDC_HEADERS |
|
#include <stdlib.h> |
|
#include <string.h> |
|
#else |
|
extern void *malloc(); |
|
extern void *realloc(); |
|
extern char *getenv(); |
|
extern char *strchr(); |
|
#endif |
|
|
|
#define range(low, item, hi) max((low), min((item), (hi))) |
|
|
|
#undef min /* just in case */ |
|
|
|
/* min --- return minimum of two numbers */ |
|
|
|
static inline int |
|
min(int a, int b) |
|
{ |
|
return (a < b ? a : b); |
|
} |
|
|
|
#undef max /* also, just in case */ |
|
|
|
/* max --- return maximum of two numbers */ |
|
|
|
static inline int |
|
max(int a, int b) |
|
{ |
|
return (a > b ? a : b); |
|
} |
|
|
|
#ifdef NO_STRING_LITERAL_CONCATENATION |
|
#error No string literal concatenation |
|
#endif |
|
|
|
#define add(x,y) (rb_funcall((x), '+', 1, (y))) |
|
#define sub(x,y) (rb_funcall((x), '-', 1, (y))) |
|
#define mul(x,y) (rb_funcall((x), '*', 1, (y))) |
|
#define quo(x,y) (rb_funcall((x), rb_intern("quo"), 1, (y))) |
|
#define div(x,y) (rb_funcall((x), rb_intern("div"), 1, (y))) |
|
#define mod(x,y) (rb_funcall((x), '%', 1, (y))) |
|
|
|
/* strftime --- produce formatted time */ |
|
|
|
enum {LEFT, CHCASE, LOWER, UPPER}; |
|
#define BIT_OF(n) (1U<<(n)) |
|
|
|
static char * |
|
resize_buffer(VALUE ftime, char *s, const char **start, const char **endp, |
|
ptrdiff_t n, size_t maxsize) |
|
{ |
|
size_t len = s - *start; |
|
size_t nlen = len + n * 2; |
|
|
|
if (nlen < len || nlen > maxsize) { |
|
return 0; |
|
} |
|
rb_str_set_len(ftime, len); |
|
rb_str_modify_expand(ftime, nlen-len); |
|
s = RSTRING_PTR(ftime); |
|
*endp = s + nlen; |
|
*start = s; |
|
return s += len; |
|
} |
|
|
|
static void |
|
buffer_size_check(const char *s, |
|
const char *format_end, size_t format_len, |
|
rb_encoding *enc) |
|
{ |
|
if (!s) { |
|
const char *format = format_end-format_len; |
|
VALUE fmt = rb_enc_str_new(format, format_len, enc); |
|
rb_syserr_fail_str(ERANGE, fmt); |
|
} |
|
} |
|
|
|
static char * |
|
case_conv(char *s, ptrdiff_t i, int flags) |
|
{ |
|
switch (flags & (BIT_OF(UPPER)|BIT_OF(LOWER))) { |
|
case BIT_OF(UPPER): |
|
do { |
|
if (ISLOWER(*s)) *s = TOUPPER(*s); |
|
} while (s++, --i); |
|
break; |
|
case BIT_OF(LOWER): |
|
do { |
|
if (ISUPPER(*s)) *s = TOLOWER(*s); |
|
} while (s++, --i); |
|
break; |
|
default: |
|
s += i; |
|
break; |
|
} |
|
return s; |
|
} |
|
|
|
static VALUE |
|
format_value(VALUE val, int base) |
|
{ |
|
if (!RB_TYPE_P(val, T_BIGNUM)) |
|
val = rb_Integer(val); |
|
return rb_big2str(val, base); |
|
} |
|
|
|
/* |
|
* enc is the encoding of the format. It is used as the encoding of resulted |
|
* string, but the name of the month and weekday are always US-ASCII. So it |
|
* is only used for the timezone name on Windows. |
|
*/ |
|
static VALUE |
|
rb_strftime_with_timespec(VALUE ftime, const char *format, size_t format_len, |
|
rb_encoding *enc, const struct vtm *vtm, VALUE timev, |
|
struct timespec *ts, int gmt, size_t maxsize) |
|
{ |
|
size_t len = RSTRING_LEN(ftime); |
|
char *s = RSTRING_PTR(ftime); |
|
const char *start = s; |
|
const char *endp = start + rb_str_capacity(ftime); |
|
const char *const format_end = format + format_len; |
|
const char *sp, *tp; |
|
#define TBUFSIZE 100 |
|
auto char tbuf[TBUFSIZE]; |
|
long off; |
|
ptrdiff_t i; |
|
int w; |
|
long y; |
|
int precision, flags, colons; |
|
char padding; |
|
#ifdef MAILHEADER_EXT |
|
int sign; |
|
#endif |
|
|
|
/* various tables, useful in North America */ |
|
static const char days_l[][10] = { |
|
"Sunday", "Monday", "Tuesday", "Wednesday", |
|
"Thursday", "Friday", "Saturday", |
|
}; |
|
static const char months_l[][10] = { |
|
"January", "February", "March", "April", |
|
"May", "June", "July", "August", "September", |
|
"October", "November", "December", |
|
}; |
|
static const char ampm[][3] = { "AM", "PM", }; |
|
|
|
if (format == NULL || format_len == 0 || vtm == NULL) { |
|
err: |
|
return 0; |
|
} |
|
|
|
if (enc && |
|
(enc == rb_usascii_encoding() || |
|
enc == rb_ascii8bit_encoding() || |
|
enc == rb_locale_encoding())) { |
|
enc = NULL; |
|
} |
|
|
|
s += len; |
|
for (; format < format_end; format++) { |
|
#define FLAG_FOUND() do { \ |
|
if (precision > 0) \ |
|
goto unknown; \ |
|
} while (0) |
|
#define NEEDS(n) do { \ |
|
if (s >= endp || (n) >= endp - s - 1) { \ |
|
s = resize_buffer(ftime, s, &start, &endp, (n), maxsize); \ |
|
buffer_size_check(s, format_end, format_len, enc); \ |
|
} \ |
|
} while (0) |
|
#define FILL_PADDING(i) do { \ |
|
if (!(flags & BIT_OF(LEFT)) && precision > (i)) { \ |
|
NEEDS(precision); \ |
|
memset(s, padding ? padding : ' ', precision - (i)); \ |
|
s += precision - (i); \ |
|
} \ |
|
else { \ |
|
NEEDS(i); \ |
|
} \ |
|
} while (0); |
|
#define FMT_PADDING(fmt, def_pad) \ |
|
(&"%*"fmt"\0""%0*"fmt[\ |
|
(padding == '0' || (!padding && (def_pad) == '0')) ? \ |
|
rb_strlen_lit("%*"fmt)+1 : 0]) |
|
#define FMT_PRECISION(def_prec) \ |
|
((flags & BIT_OF(LEFT)) ? (1) : \ |
|
(precision <= 0) ? (def_prec) : (precision)) |
|
#define FMT(def_pad, def_prec, fmt, val) \ |
|
do { \ |
|
precision = FMT_PRECISION(def_prec); \ |
|
len = s - start; \ |
|
NEEDS(precision); \ |
|
rb_str_set_len(ftime, len); \ |
|
rb_str_catf(ftime, FMT_PADDING(fmt, def_pad), \ |
|
precision, (val)); \ |
|
RSTRING_GETMEM(ftime, s, len); \ |
|
endp = (start = s) + rb_str_capacity(ftime); \ |
|
s += len; \ |
|
} while (0) |
|
#define STRFTIME(fmt) \ |
|
do { \ |
|
len = s - start; \ |
|
rb_str_set_len(ftime, len); \ |
|
if (!rb_strftime_with_timespec(ftime, (fmt), rb_strlen_lit(fmt), \ |
|
enc, vtm, timev, ts, gmt, maxsize)) \ |
|
return 0; \ |
|
s = RSTRING_PTR(ftime); \ |
|
i = RSTRING_LEN(ftime) - len; \ |
|
endp = (start = s) + rb_str_capacity(ftime); \ |
|
s += len; \ |
|
if (i > 0) case_conv(s, i, flags); \ |
|
if (precision > i) {\ |
|
NEEDS(precision); \ |
|
memmove(s + precision - i, s, i);\ |
|
memset(s, padding ? padding : ' ', precision - i); \ |
|
s += precision; \ |
|
} \ |
|
else s += i; \ |
|
} while (0) |
|
#define FMTV(def_pad, def_prec, fmt, val) \ |
|
do { \ |
|
VALUE tmp = (val); \ |
|
if (FIXNUM_P(tmp)) { \ |
|
FMT((def_pad), (def_prec), "l"fmt, FIX2LONG(tmp)); \ |
|
} \ |
|
else { \ |
|
const int base = ((fmt[0] == 'x') ? 16 : \ |
|
(fmt[0] == 'o') ? 8 : \ |
|
10); \ |
|
precision = FMT_PRECISION(def_prec); \ |
|
if (!padding) padding = (def_pad); \ |
|
tmp = format_value(tmp, base); \ |
|
i = RSTRING_LEN(tmp); \ |
|
FILL_PADDING(i); \ |
|
rb_str_set_len(ftime, s-start); \ |
|
rb_str_append(ftime, tmp); \ |
|
RSTRING_GETMEM(ftime, s, len); \ |
|
endp = (start = s) + rb_str_capacity(ftime); \ |
|
s += len; \ |
|
} \ |
|
} while (0) |
|
|
|
tp = memchr(format, '%', format_end - format); |
|
if (!tp) tp = format_end; |
|
NEEDS(tp - format); |
|
memcpy(s, format, tp - format); |
|
s += tp - format; |
|
format = tp; |
|
if (format == format_end) break; |
|
|
|
tp = tbuf; |
|
sp = format; |
|
precision = -1; |
|
flags = 0; |
|
padding = 0; |
|
colons = 0; |
|
again: |
|
if (++format >= format_end) goto unknown; |
|
switch (*format) { |
|
case '%': |
|
FILL_PADDING(1); |
|
*s++ = '%'; |
|
continue; |
|
|
|
case 'a': /* abbreviated weekday name */ |
|
if (flags & BIT_OF(CHCASE)) { |
|
flags &= ~(BIT_OF(LOWER)|BIT_OF(CHCASE)); |
|
flags |= BIT_OF(UPPER); |
|
} |
|
if (vtm->wday < 0 || vtm->wday > 6) |
|
i = 1, tp = "?"; |
|
else |
|
i = 3, tp = days_l[vtm->wday]; |
|
break; |
|
|
|
case 'A': /* full weekday name */ |
|
if (flags & BIT_OF(CHCASE)) { |
|
flags &= ~(BIT_OF(LOWER)|BIT_OF(CHCASE)); |
|
flags |= BIT_OF(UPPER); |
|
} |
|
if (vtm->wday < 0 || vtm->wday > 6) |
|
i = 1, tp = "?"; |
|
else |
|
i = strlen(tp = days_l[vtm->wday]); |
|
break; |
|
|
|
#ifdef SYSV_EXT |
|
case 'h': /* abbreviated month name */ |
|
#endif |
|
case 'b': /* abbreviated month name */ |
|
if (flags & BIT_OF(CHCASE)) { |
|
flags &= ~(BIT_OF(LOWER)|BIT_OF(CHCASE)); |
|
flags |= BIT_OF(UPPER); |
|
} |
|
if (vtm->mon < 1 || vtm->mon > 12) |
|
i = 1, tp = "?"; |
|
else |
|
i = 3, tp = months_l[vtm->mon-1]; |
|
break; |
|
|
|
case 'B': /* full month name */ |
|
if (flags & BIT_OF(CHCASE)) { |
|
flags &= ~(BIT_OF(LOWER)|BIT_OF(CHCASE)); |
|
flags |= BIT_OF(UPPER); |
|
} |
|
if (vtm->mon < 1 || vtm->mon > 12) |
|
i = 1, tp = "?"; |
|
else |
|
i = strlen(tp = months_l[vtm->mon-1]); |
|
break; |
|
|
|
case 'c': /* appropriate date and time representation */ |
|
STRFTIME("%a %b %e %H:%M:%S %Y"); |
|
continue; |
|
|
|
case 'd': /* day of the month, 01 - 31 */ |
|
i = range(1, vtm->mday, 31); |
|
FMT('0', 2, "d", (int)i); |
|
continue; |
|
|
|
case 'H': /* hour, 24-hour clock, 00 - 23 */ |
|
i = range(0, vtm->hour, 23); |
|
FMT('0', 2, "d", (int)i); |
|
continue; |
|
|
|
case 'I': /* hour, 12-hour clock, 01 - 12 */ |
|
i = range(0, vtm->hour, 23); |
|
if (i == 0) |
|
i = 12; |
|
else if (i > 12) |
|
i -= 12; |
|
FMT('0', 2, "d", (int)i); |
|
continue; |
|
|
|
case 'j': /* day of the year, 001 - 366 */ |
|
i = range(1, vtm->yday, 366); |
|
FMT('0', 3, "d", (int)i); |
|
continue; |
|
|
|
case 'm': /* month, 01 - 12 */ |
|
i = range(1, vtm->mon, 12); |
|
FMT('0', 2, "d", (int)i); |
|
continue; |
|
|
|
case 'M': /* minute, 00 - 59 */ |
|
i = range(0, vtm->min, 59); |
|
FMT('0', 2, "d", (int)i); |
|
continue; |
|
|
|
case 'p': /* AM or PM based on 12-hour clock */ |
|
case 'P': /* am or pm based on 12-hour clock */ |
|
if ((*format == 'p' && (flags & BIT_OF(CHCASE))) || |
|
(*format == 'P' && !(flags & (BIT_OF(CHCASE)|BIT_OF(UPPER))))) { |
|
flags &= ~(BIT_OF(UPPER)|BIT_OF(CHCASE)); |
|
flags |= BIT_OF(LOWER); |
|
} |
|
i = range(0, vtm->hour, 23); |
|
if (i < 12) |
|
tp = ampm[0]; |
|
else |
|
tp = ampm[1]; |
|
i = 2; |
|
break; |
|
|
|
case 's': |
|
if (ts) { |
|
time_t sec = ts->tv_sec; |
|
if (~(time_t)0 <= 0) |
|
FMT('0', 1, PRI_TIMET_PREFIX"d", sec); |
|
else |
|
FMT('0', 1, PRI_TIMET_PREFIX"u", sec); |
|
} |
|
else { |
|
VALUE sec = div(timev, INT2FIX(1)); |
|
FMTV('0', 1, "d", sec); |
|
} |
|
continue; |
|
|
|
case 'S': /* second, 00 - 60 */ |
|
i = range(0, vtm->sec, 60); |
|
FMT('0', 2, "d", (int)i); |
|
continue; |
|
|
|
case 'U': /* week of year, Sunday is first day of week */ |
|
FMT('0', 2, "d", weeknumber_v(vtm, 0)); |
|
continue; |
|
|
|
case 'w': /* weekday, Sunday == 0, 0 - 6 */ |
|
i = range(0, vtm->wday, 6); |
|
FMT('0', 1, "d", (int)i); |
|
continue; |
|
|
|
case 'W': /* week of year, Monday is first day of week */ |
|
FMT('0', 2, "d", weeknumber_v(vtm, 1)); |
|
continue; |
|
|
|
case 'x': /* appropriate date representation */ |
|
STRFTIME("%m/%d/%y"); |
|
continue; |
|
|
|
case 'X': /* appropriate time representation */ |
|
STRFTIME("%H:%M:%S"); |
|
continue; |
|
|
|
case 'y': /* year without a century, 00 - 99 */ |
|
i = NUM2INT(mod(vtm->year, INT2FIX(100))); |
|
FMT('0', 2, "d", (int)i); |
|
continue; |
|
|
|
case 'Y': /* year with century */ |
|
if (FIXNUM_P(vtm->year)) { |
|
long y = FIX2LONG(vtm->year); |
|
FMT('0', 0 <= y ? 4 : 5, "ld", y); |
|
} |
|
else { |
|
FMTV('0', 4, "d", vtm->year); |
|
} |
|
continue; |
|
|
|
#ifdef MAILHEADER_EXT |
|
case 'z': /* time zone offset east of GMT e.g. -0600 */ |
|
if (gmt) { |
|
off = 0; |
|
} |
|
else { |
|
off = NUM2LONG(rb_funcall(vtm->utc_offset, rb_intern("round"), 0)); |
|
} |
|
if (off < 0) { |
|
off = -off; |
|
sign = -1; |
|
} else { |
|
sign = +1; |
|
} |
|
switch (colons) { |
|
case 0: /* %z -> +hhmm */ |
|
precision = precision <= 5 ? 2 : precision-3; |
|
NEEDS(precision + 3); |
|
break; |
|
|
|
case 1: /* %:z -> +hh:mm */ |
|
precision = precision <= 6 ? 2 : precision-4; |
|
NEEDS(precision + 4); |
|
break; |
|
|
|
case 2: /* %::z -> +hh:mm:ss */ |
|
precision = precision <= 9 ? 2 : precision-7; |
|
NEEDS(precision + 7); |
|
break; |
|
|
|
case 3: /* %:::z -> +hh[:mm[:ss]] */ |
|
if (off % 3600 == 0) { |
|
precision = precision <= 3 ? 2 : precision-1; |
|
NEEDS(precision + 3); |
|
} |
|
else if (off % 60 == 0) { |
|
precision = precision <= 6 ? 2 : precision-4; |
|
NEEDS(precision + 4); |
|
} |
|
else { |
|
precision = precision <= 9 ? 2 : precision-7; |
|
NEEDS(precision + 9); |
|
} |
|
break; |
|
|
|
default: |
|
format--; |
|
goto unknown; |
|
} |
|
i = snprintf(s, endp - s, (padding == ' ' ? "%+*ld" : "%+.*ld"), |
|
precision + 1, sign * (off / 3600)); |
|
if (i < 0) goto err; |
|
if (sign < 0 && off < 3600) { |
|
*(padding == ' ' ? s + i - 2 : s) = '-'; |
|
} |
|
s += i; |
|
off = off % 3600; |
|
if (colons == 3 && off == 0) |
|
continue; |
|
if (1 <= colons) |
|
*s++ = ':'; |
|
i = snprintf(s, endp - s, "%02d", (int)(off / 60)); |
|
if (i < 0) goto err; |
|
s += i; |
|
off = off % 60; |
|
if (colons == 3 && off == 0) |
|
continue; |
|
if (2 <= colons) { |
|
*s++ = ':'; |
|
i = snprintf(s, endp - s, "%02d", (int)off); |
|
if (i < 0) goto err; |
|
s += i; |
|
} |
|
continue; |
|
#endif /* MAILHEADER_EXT */ |
|
|
|
case 'Z': /* time zone name or abbreviation */ |
|
if (flags & BIT_OF(CHCASE)) { |
|
flags &= ~(BIT_OF(UPPER)|BIT_OF(CHCASE)); |
|
flags |= BIT_OF(LOWER); |
|
} |
|
if (gmt) { |
|
i = 3; |
|
tp = "UTC"; |
|
break; |
|
} |
|
if (vtm->zone == NULL) { |
|
i = 0; |
|
} |
|
else { |
|
tp = vtm->zone; |
|
if (enc) { |
|
for (i = 0; i < TBUFSIZE && tp[i]; i++) { |
|
if ((unsigned char)tp[i] > 0x7F) { |
|
VALUE str = rb_str_conv_enc_opts(rb_str_new_cstr(tp), rb_locale_encoding(), enc, ECONV_UNDEF_REPLACE|ECONV_INVALID_REPLACE, Qnil); |
|
i = strlcpy(tbuf, RSTRING_PTR(str), TBUFSIZE); |
|
tp = tbuf; |
|
break; |
|
} |
|
} |
|
} |
|
else |
|
i = strlen(tp); |
|
} |
|
break; |
|
|
|
#ifdef SYSV_EXT |
|
case 'n': /* same as \n */ |
|
FILL_PADDING(1); |
|
*s++ = '\n'; |
|
continue; |
|
|
|
case 't': /* same as \t */ |
|
FILL_PADDING(1); |
|
*s++ = '\t'; |
|
continue; |
|
|
|
case 'D': /* date as %m/%d/%y */ |
|
STRFTIME("%m/%d/%y"); |
|
continue; |
|
|
|
case 'e': /* day of month, blank padded */ |
|
FMT(' ', 2, "d", range(1, vtm->mday, 31)); |
|
continue; |
|
|
|
case 'r': /* time as %I:%M:%S %p */ |
|
STRFTIME("%I:%M:%S %p"); |
|
continue; |
|
|
|
case 'R': /* time as %H:%M */ |
|
STRFTIME("%H:%M"); |
|
continue; |
|
|
|
case 'T': /* time as %H:%M:%S */ |
|
STRFTIME("%H:%M:%S"); |
|
continue; |
|
#endif |
|
|
|
#ifdef SUNOS_EXT |
|
case 'k': /* hour, 24-hour clock, blank pad */ |
|
i = range(0, vtm->hour, 23); |
|
FMT(' ', 2, "d", (int)i); |
|
continue; |
|
|
|
case 'l': /* hour, 12-hour clock, 1 - 12, blank pad */ |
|
i = range(0, vtm->hour, 23); |
|
if (i == 0) |
|
i = 12; |
|
else if (i > 12) |
|
i -= 12; |
|
FMT(' ', 2, "d", (int)i); |
|
continue; |
|
#endif |
|
|
|
|
|
#ifdef VMS_EXT |
|
case 'v': /* date as dd-bbb-YYYY */ |
|
STRFTIME("%e-%^b-%4Y"); |
|
continue; |
|
#endif |
|
|
|
|
|
#ifdef POSIX2_DATE |
|
case 'C': |
|
FMTV('0', 2, "d", div(vtm->year, INT2FIX(100))); |
|
continue; |
|
|
|
case 'E': |
|
/* POSIX locale extensions, ignored for now */ |
|
if (!format[1] || !strchr("cCxXyY", format[1])) |
|
goto unknown; |
|
goto again; |
|
case 'O': |
|
/* POSIX locale extensions, ignored for now */ |
|
if (!format[1] || !strchr("deHkIlmMSuUVwWy", format[1])) |
|
goto unknown; |
|
goto again; |
|
|
|
case 'V': /* week of year according ISO 8601 */ |
|
FMT('0', 2, "d", iso8601wknum_v(vtm)); |
|
continue; |
|
|
|
case 'u': |
|
/* ISO 8601: Weekday as a decimal number [1 (Monday) - 7] */ |
|
FMT('0', 1, "d", vtm->wday == 0 ? 7 : vtm->wday); |
|
continue; |
|
#endif /* POSIX2_DATE */ |
|
|
|
#ifdef ISO_DATE_EXT |
|
case 'G': |
|
case 'g': |
|
/* |
|
* Year of ISO week. |
|
* |
|
* If it's December but the ISO week number is one, |
|
* that week is in next year. |
|
* If it's January but the ISO week number is 52 or |
|
* 53, that week is in last year. |
|
* Otherwise, it's this year. |
|
*/ |
|
{ |
|
VALUE yv = vtm->year; |
|
w = iso8601wknum_v(vtm); |
|
if (vtm->mon == 12 && w == 1) |
|
yv = add(yv, INT2FIX(1)); |
|
else if (vtm->mon == 1 && w >= 52) |
|
yv = sub(yv, INT2FIX(1)); |
|
|
|
if (*format == 'G') { |
|
if (FIXNUM_P(yv)) { |
|
const long y = FIX2LONG(yv); |
|
FMT('0', 0 <= y ? 4 : 5, "ld", y); |
|
} |
|
else { |
|
FMTV('0', 4, "d", yv); |
|
} |
|
} |
|
else { |
|
yv = mod(yv, INT2FIX(100)); |
|
y = FIX2LONG(yv); |
|
FMT('0', 2, "ld", y); |
|
} |
|
continue; |
|
} |
|
|
|
#endif /* ISO_DATE_EXT */ |
|
|
|
|
|
case 'L': |
|
w = 3; |
|
goto subsec; |
|
|
|
case 'N': |
|
/* |
|
* fractional second digits. default is 9 digits |
|
* (nanosecond). |
|
* |
|
* %3N millisecond (3 digits) |
|
* %6N microsecond (6 digits) |
|
* %9N nanosecond (9 digits) |
|
*/ |
|
w = 9; |
|
subsec: |
|
if (precision <= 0) { |
|
precision = w; |
|
} |
|
NEEDS(precision); |
|
|
|
if (ts) { |
|
long subsec = ts->tv_nsec; |
|
if (9 < precision) { |
|
snprintf(s, endp - s, "%09ld", subsec); |
|
memset(s+9, '0', precision-9); |
|
s += precision; |
|
} |
|
else { |
|
int i; |
|
for (i = 0; i < 9-precision; i++) |
|
subsec /= 10; |
|
snprintf(s, endp - s, "%0*ld", precision, subsec); |
|
s += precision; |
|
} |
|
} |
|
else { |
|
VALUE subsec = mod(timev, INT2FIX(1)); |
|
int ww; |
|
long n; |
|
|
|
ww = precision; |
|
while (9 <= ww) { |
|
subsec = mul(subsec, INT2FIX(1000000000)); |
|
ww -= 9; |
|
} |
|
n = 1; |
|
for (; 0 < ww; ww--) |
|
n *= 10; |
|
if (n != 1) |
|
subsec = mul(subsec, INT2FIX(n)); |
|
subsec = div(subsec, INT2FIX(1)); |
|
|
|
if (FIXNUM_P(subsec)) { |
|
(void)snprintf(s, endp - s, "%0*ld", precision, FIX2LONG(subsec)); |
|
s += precision; |
|
} |
|
else { |
|
VALUE args[2], result; |
|
args[0] = INT2FIX(precision); |
|
args[1] = subsec; |
|
result = rb_str_format(2, args, rb_str_new2("%0*d")); |
|
(void)strlcpy(s, StringValueCStr(result), endp-s); |
|
s += precision; |
|
} |
|
} |
|
continue; |
|
|
|
case 'F': /* Equivalent to %Y-%m-%d */ |
|
STRFTIME("%Y-%m-%d"); |
|
continue; |
|
|
|
case '-': |
|
FLAG_FOUND(); |
|
flags |= BIT_OF(LEFT); |
|
padding = precision = 0; |
|
goto again; |
|
|
|
case '^': |
|
FLAG_FOUND(); |
|
flags |= BIT_OF(UPPER); |
|
goto again; |
|
|
|
case '#': |
|
FLAG_FOUND(); |
|
flags |= BIT_OF(CHCASE); |
|
goto again; |
|
|
|
case '_': |
|
FLAG_FOUND(); |
|
padding = ' '; |
|
goto again; |
|
|
|
case ':': |
|
for (colons = 1; colons <= 3; ++colons) { |
|
if (format+colons >= format_end) goto unknown; |
|
if (format[colons] == 'z') break; |
|
if (format[colons] != ':') goto unknown; |
|
} |
|
format += colons - 1; |
|
goto again; |
|
|
|
case '0': |
|
padding = '0'; |
|
case '1': case '2': case '3': case '4': |
|
case '5': case '6': case '7': case '8': case '9': |
|
{ |
|
size_t n; |
|
int ov; |
|
unsigned long u = ruby_scan_digits(format, format_end-format, 10, &n, &ov); |
|
if (ov || u > INT_MAX) goto unknown; |
|
precision = (int)u; |
|
format += n - 1; |
|
goto again; |
|
} |
|
|
|
default: |
|
unknown: |
|
i = format - sp + 1; |
|
tp = sp; |
|
precision = -1; |
|
flags = 0; |
|
padding = 0; |
|
colons = 0; |
|
break; |
|
} |
|
if (i) { |
|
FILL_PADDING(i); |
|
memcpy(s, tp, i); |
|
s = case_conv(s, i, flags); |
|
} |
|
} |
|
if (format != format_end) { |
|
return 0; |
|
} |
|
len = s - start; |
|
rb_str_set_len(ftime, len); |
|
rb_str_resize(ftime, len); |
|
return ftime; |
|
} |
|
|
|
static size_t |
|
strftime_size_limit(size_t format_len) |
|
{ |
|
size_t limit = format_len * (1*1024*1024); |
|
if (limit < format_len) limit = format_len; |
|
else if (limit < 1024) limit = 1024; |
|
return limit; |
|
} |
|
|
|
VALUE |
|
rb_strftime(const char *format, size_t format_len, |
|
rb_encoding *enc, const struct vtm *vtm, VALUE timev, int gmt) |
|
{ |
|
VALUE result = rb_enc_str_new(0, 0, enc); |
|
return rb_strftime_with_timespec(result, format, format_len, enc, |
|
vtm, timev, NULL, gmt, |
|
strftime_size_limit(format_len)); |
|
} |
|
|
|
VALUE |
|
rb_strftime_timespec(const char *format, size_t format_len, |
|
rb_encoding *enc, const struct vtm *vtm, struct timespec *ts, int gmt) |
|
{ |
|
VALUE result = rb_enc_str_new(0, 0, enc); |
|
return rb_strftime_with_timespec(result, format, format_len, enc, |
|
vtm, Qnil, ts, gmt, |
|
strftime_size_limit(format_len)); |
|
} |
|
|
|
#if 0 |
|
VALUE |
|
rb_strftime_limit(const char *format, size_t format_len, |
|
rb_encoding *enc, const struct vtm *vtm, struct timespec *ts, |
|
int gmt, size_t maxsize) |
|
{ |
|
VALUE result = rb_enc_str_new(0, 0, enc); |
|
return rb_strftime_with_timespec(result, format, format_len, enc, |
|
vtm, Qnil, ts, gmt, maxsize); |
|
} |
|
#endif |
|
|
|
/* isleap --- is a year a leap year? */ |
|
|
|
static int |
|
isleap(long year) |
|
{ |
|
return ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0); |
|
} |
|
|
|
|
|
static void |
|
vtm2tm_noyear(const struct vtm *vtm, struct tm *result) |
|
{ |
|
struct tm tm; |
|
|
|
/* for isleap() in iso8601wknum. +100 is -1900 (mod 400). */ |
|
tm.tm_year = FIX2INT(mod(vtm->year, INT2FIX(400))) + 100; |
|
|
|
tm.tm_mon = vtm->mon-1; |
|
tm.tm_mday = vtm->mday; |
|
tm.tm_hour = vtm->hour; |
|
tm.tm_min = vtm->min; |
|
tm.tm_sec = vtm->sec; |
|
tm.tm_wday = vtm->wday; |
|
tm.tm_yday = vtm->yday-1; |
|
tm.tm_isdst = vtm->isdst; |
|
#if defined(HAVE_STRUCT_TM_TM_GMTOFF) |
|
tm.tm_gmtoff = NUM2LONG(vtm->utc_offset); |
|
#endif |
|
#if defined(HAVE_TM_ZONE) |
|
tm.tm_zone = (char *)vtm->zone; |
|
#endif |
|
*result = tm; |
|
} |
|
|
|
#ifdef POSIX2_DATE |
|
/* iso8601wknum --- compute week number according to ISO 8601 */ |
|
|
|
static int |
|
iso8601wknum(const struct tm *timeptr) |
|
{ |
|
/* |
|
* From 1003.2: |
|
* If the week (Monday to Sunday) containing January 1 |
|
* has four or more days in the new year, then it is week 1; |
|
* otherwise it is the highest numbered week of the previous |
|
* year (52 or 53), and the next week is week 1. |
|
* |
|
* ADR: This means if Jan 1 was Monday through Thursday, |
|
* it was week 1, otherwise week 52 or 53. |
|
* |
|
* XPG4 erroneously included POSIX.2 rationale text in the |
|
* main body of the standard. Thus it requires week 53. |
|
*/ |
|
|
|
int weeknum, jan1day; |
|
|
|
/* get week number, Monday as first day of the week */ |
|
weeknum = weeknumber(timeptr, 1); |
|
|
|
/* |
|
* With thanks and tip of the hatlo to tml@tik.vtt.fi |
|
* |
|
* What day of the week does January 1 fall on? |
|
* We know that |
|
* (timeptr->tm_yday - jan1.tm_yday) MOD 7 == |
|
* (timeptr->tm_wday - jan1.tm_wday) MOD 7 |
|
* and that |
|
* jan1.tm_yday == 0 |
|
* and that |
|
* timeptr->tm_wday MOD 7 == timeptr->tm_wday |
|
* from which it follows that. . . |
|
*/ |
|
jan1day = timeptr->tm_wday - (timeptr->tm_yday % 7); |
|
if (jan1day < 0) |
|
jan1day += 7; |
|
|
|
/* |
|
* If Jan 1 was a Monday through Thursday, it was in |
|
* week 1. Otherwise it was last year's highest week, which is |
|
* this year's week 0. |
|
* |
|
* What does that mean? |
|
* If Jan 1 was Monday, the week number is exactly right, it can |
|
* never be 0. |
|
* If it was Tuesday through Thursday, the weeknumber is one |
|
* less than it should be, so we add one. |
|
* Otherwise, Friday, Saturday or Sunday, the week number is |
|
* OK, but if it is 0, it needs to be 52 or 53. |
|
*/ |
|
switch (jan1day) { |
|
case 1: /* Monday */ |
|
break; |
|
case 2: /* Tuesday */ |
|
case 3: /* Wednesday */ |
|
case 4: /* Thursday */ |
|
weeknum++; |
|
break; |
|
case 5: /* Friday */ |
|
case 6: /* Saturday */ |
|
case 0: /* Sunday */ |
|
if (weeknum == 0) { |
|
#ifdef USE_BROKEN_XPG4 |
|
/* XPG4 (as of March 1994) says 53 unconditionally */ |
|
weeknum = 53; |
|
#else |
|
/* get week number of last week of last year */ |
|
struct tm dec31ly; /* 12/31 last year */ |
|
dec31ly = *timeptr; |
|
dec31ly.tm_year--; |
|
dec31ly.tm_mon = 11; |
|
dec31ly.tm_mday = 31; |
|
dec31ly.tm_wday = (jan1day == 0) ? 6 : jan1day - 1; |
|
dec31ly.tm_yday = 364 + isleap(dec31ly.tm_year + 1900L); |
|
weeknum = iso8601wknum(& dec31ly); |
|
#endif |
|
} |
|
break; |
|
} |
|
|
|
if (timeptr->tm_mon == 11) { |
|
/* |
|
* The last week of the year |
|
* can be in week 1 of next year. |
|
* Sigh. |
|
* |
|
* This can only happen if |
|
* M T W |
|
* 29 30 31 |
|
* 30 31 |
|
* 31 |
|
*/ |
|
int wday, mday; |
|
|
|
wday = timeptr->tm_wday; |
|
mday = timeptr->tm_mday; |
|
if ( (wday == 1 && (mday >= 29 && mday <= 31)) |
|
|| (wday == 2 && (mday == 30 || mday == 31)) |
|
|| (wday == 3 && mday == 31)) |
|
weeknum = 1; |
|
} |
|
|
|
return weeknum; |
|
} |
|
|
|
static int |
|
iso8601wknum_v(const struct vtm *vtm) |
|
{ |
|
struct tm tm; |
|
vtm2tm_noyear(vtm, &tm); |
|
return iso8601wknum(&tm); |
|
} |
|
|
|
#endif |
|
|
|
/* weeknumber --- figure how many weeks into the year */ |
|
|
|
/* With thanks and tip of the hatlo to ado@elsie.nci.nih.gov */ |
|
|
|
static int |
|
weeknumber(const struct tm *timeptr, int firstweekday) |
|
{ |
|
int wday = timeptr->tm_wday; |
|
int ret; |
|
|
|
if (firstweekday == 1) { |
|
if (wday == 0) /* sunday */ |
|
wday = 6; |
|
else |
|
wday--; |
|
} |
|
ret = ((timeptr->tm_yday + 7 - wday) / 7); |
|
if (ret < 0) |
|
ret = 0; |
|
return ret; |
|
} |
|
|
|
static int |
|
weeknumber_v(const struct vtm *vtm, int firstweekday) |
|
{ |
|
struct tm tm; |
|
vtm2tm_noyear(vtm, &tm); |
|
return weeknumber(&tm, firstweekday); |
|
} |
|
|
|
#if 0 |
|
/* ADR --- I'm loathe to mess with ado's code ... */ |
|
|
|
Date: Wed, 24 Apr 91 20:54:08 MDT |
|
From: Michal Jaegermann <audfax!emory!vm.ucs.UAlberta.CA!NTOMCZAK> |
|
To: arnold@audiofax.com |
|
|
|
Hi Arnold, |
|
in a process of fixing of strftime() in libraries on Atari ST I grabbed |
|
some pieces of code from your own strftime. When doing that it came |
|
to mind that your weeknumber() function compiles a little bit nicer |
|
in the following form: |
|
/* |
|
* firstweekday is 0 if starting in Sunday, non-zero if in Monday |
|
*/ |
|
{ |
|
return (timeptr->tm_yday - timeptr->tm_wday + |
|
(firstweekday ? (timeptr->tm_wday ? 8 : 1) : 7)) / 7; |
|
} |
|
How nicer it depends on a compiler, of course, but always a tiny bit. |
|
|
|
Cheers, |
|
Michal |
|
ntomczak@vm.ucs.ualberta.ca |
|
#endif |
|
|
|
#ifdef TEST_STRFTIME |
|
|
|
/* |
|
* NAME: |
|
* tst |
|
* |
|
* SYNOPSIS: |
|
* tst |
|
* |
|
* DESCRIPTION: |
|
* "tst" is a test driver for the function "strftime". |
|
* |
|
* OPTIONS: |
|
* None. |
|
* |
|
* AUTHOR: |
|
* Karl Vogel |
|
* Control Data Systems, Inc. |
|
* vogelke@c-17igp.wpafb.af.mil |
|
* |
|
* BUGS: |
|
* None noticed yet. |
|
* |
|
* COMPILE: |
|
* cc -o tst -DTEST_STRFTIME strftime.c |
|
*/ |
|
|
|
/* ADR: I reformatted this to my liking, and deleted some unneeded code. */ |
|
|
|
#ifndef NULL |
|
#include <stdio.h> |
|
#endif |
|
#include <sys/time.h> |
|
#include <string.h> |
|
|
|
#define MAXTIME 132 |
|
|
|
/* |
|
* Array of time formats. |
|
*/ |
|
|
|
static char *array[] = |
|
{ |
|
"(%%A) full weekday name, var length (Sunday..Saturday) %A", |
|
"(%%B) full month name, var length (January..December) %B", |
|
"(%%C) Century %C", |
|
"(%%D) date (%%m/%%d/%%y) %D", |
|
"(%%E) Locale extensions (ignored) %E", |
|
"(%%H) hour (24-hour clock, 00..23) %H", |
|
"(%%I) hour (12-hour clock, 01..12) %I", |
|
"(%%M) minute (00..59) %M", |
|
"(%%O) Locale extensions (ignored) %O", |
|
"(%%R) time, 24-hour (%%H:%%M) %R", |
|
"(%%S) second (00..60) %S", |
|
"(%%T) time, 24-hour (%%H:%%M:%%S) %T", |
|
"(%%U) week of year, Sunday as first day of week (00..53) %U", |
|
"(%%V) week of year according to ISO 8601 %V", |
|
"(%%W) week of year, Monday as first day of week (00..53) %W", |
|
"(%%X) appropriate locale time representation (%H:%M:%S) %X", |
|
"(%%Y) year with century (1970...) %Y", |
|
"(%%Z) timezone (EDT), or blank if timezone not determinable %Z", |
|
"(%%a) locale's abbreviated weekday name (Sun..Sat) %a", |
|
"(%%b) locale's abbreviated month name (Jan..Dec) %b", |
|
"(%%c) full date (Sat Nov 4 12:02:33 1989)%n%t%t%t %c", |
|
"(%%d) day of the month (01..31) %d", |
|
"(%%e) day of the month, blank-padded ( 1..31) %e", |
|
"(%%h) should be same as (%%b) %h", |
|
"(%%j) day of the year (001..366) %j", |
|
"(%%k) hour, 24-hour clock, blank pad ( 0..23) %k", |
|
"(%%l) hour, 12-hour clock, blank pad ( 1..12) %l", |
|
"(%%m) month (01..12) %m", |
|
"(%%p) locale's AM or PM based on 12-hour clock %p", |
|
"(%%r) time, 12-hour (same as %%I:%%M:%%S %%p) %r", |
|
"(%%u) ISO 8601: Weekday as decimal number [1 (Monday) - 7] %u", |
|
"(%%v) VMS date (dd-bbb-YYYY) %v", |
|
"(%%w) day of week (0..6, Sunday == 0) %w", |
|
"(%%x) appropriate locale date representation %x", |
|
"(%%y) last two digits of year (00..99) %y", |
|
"(%%z) timezone offset east of GMT as HHMM (e.g. -0500) %z", |
|
(char *) NULL |
|
}; |
|
|
|
/* main routine. */ |
|
|
|
int |
|
main(int argc, char **argv) |
|
{ |
|
long time(); |
|
|
|
char *next; |
|
char string[MAXTIME]; |
|
|
|
int k; |
|
int length; |
|
|
|
struct tm *tm; |
|
|
|
long clock; |
|
|
|
/* Call the function. */ |
|
|
|
clock = time((long *) 0); |
|
tm = localtime(&clock); |
|
|
|
for (k = 0; next = array[k]; k++) { |
|
length = strftime(string, MAXTIME, next, tm); |
|
printf("%s\n", string); |
|
} |
|
|
|
exit(0); |
|
} |
|
#endif /* TEST_STRFTIME */ |
Cannot retrieve contributors at this time
