From 3c7e9fec08fa19184727fe48b73641ef06dfdb97 Mon Sep 17 00:00:00 2001 From: Jim Meyering Date: Wed, 18 Dec 1996 00:21:38 +0000 Subject: [PATCH] Update from GNU libc. --- lib/strftime.c | 145 +++++++++++++++++++++++++++++++++++++++++++++++---------- 1 file changed, 121 insertions(+), 24 deletions(-) diff --git a/lib/strftime.c b/lib/strftime.c index 7d0ebba..b9e15d5 100644 --- a/lib/strftime.c +++ b/lib/strftime.c @@ -28,12 +28,15 @@ # define HAVE_STRUCT_ERA_ENTRY 1 # define HAVE_TM_GMTOFF 1 # define HAVE_TM_ZONE 1 +# define HAVE_TZNAME 1 +# define HAVE_TZSET 1 # define MULTIBYTE_IS_FORMAT_SAFE 1 # define STDC_HEADERS 1 # include # include "../locale/localeinfo.h" #endif +#include #include /* Some systems define `time_t' here. */ #ifdef TIME_WITH_SYS_TIME @@ -46,7 +49,6 @@ # include # endif #endif - #if HAVE_TZNAME extern char *tzname[]; #endif @@ -80,7 +82,7 @@ extern char *tzname[]; # include # include #else -# define memcpy(d, s, n) bcopy (s, d, n) +# define memcpy(d, s, n) bcopy ((s), (d), (n)) #endif #ifndef __P @@ -126,6 +128,7 @@ extern char *tzname[]; #ifdef _LIBC # define gmtime_r __gmtime_r # define localtime_r __localtime_r +extern int __tz_compute __P ((time_t timer, const struct tm *tm)); #else # if ! HAVE_LOCALTIME_R # if ! HAVE_TM_GMTOFF @@ -163,20 +166,75 @@ localtime_r (t, tp) #endif /* ! defined (_LIBC) */ -#define add(n, f) \ +#if !defined (memset) && !defined (HAVE_MEMSET) && !defined (_LIBC) +/* Some systems lack the `memset' function and we don't want to + introduce additional dependencies. */ +static const char spaces[16] = " "; + +# define memset_space(P, Len) \ + do { \ + int _len = (Len); \ + \ + do \ + { \ + int _this = _len > 16 ? 16 : _len; \ + memcpy ((P), spaces, _this); \ + (P) += _this; \ + _len -= _this; \ + } \ + while (_len > 0); \ + } while (0) +#else +# define memset_space(P, Len) memset ((P), ' ', (Len)) +#endif + +#define add(n, f) \ do \ { \ - i += (n); \ + int _n = (n); \ + int _delta = width - _n; \ + i += _n + (_delta > 0 ? _delta : 0); \ if (i >= maxsize) \ return 0; \ else \ if (p) \ { \ + if (_delta > 0) \ + memset_space (p, _delta); \ f; \ - p += (n); \ + p += _n; \ } \ } while (0) -#define cpy(n, s) add ((n), memcpy((PTR) p, (PTR) (s), (n))) + +#define cpy(n, s) \ + add ((n), \ + if (to_lowcase) \ + memcpy_lowcase (p, (s), _n); \ + else \ + memcpy ((PTR) p, (PTR) (s), _n)) + + + +#ifdef _LIBC +# define TOUPPER(Ch) toupper (Ch) +# define TOLOWER(Ch) tolower (Ch) +#else +# define TOUPPER(Ch) (islower (Ch) ? toupper (Ch) : (Ch)) +# define TOLOWER(Ch) (isupper (Ch) ? tolower (Ch) : (Ch)) +#endif + +static char *memcpy_lowcase __P ((char *dest, const char *src, size_t len)); + +static char * +memcpy_lowcase (dest, src, len) + char *dest; + const char *src; + size_t len; +{ + while (len-- > 0) + dest[len] = TOLOWER (src[len]); + return dest; +} #if ! HAVE_TM_GMTOFF /* Yield the difference between *A and *B, @@ -256,7 +314,7 @@ strftime (s, maxsize, format, tp) char *s; size_t maxsize; const char *format; - register const struct tm *tp; + const struct tm *tp; { int hour12 = tp->tm_hour; #ifdef _NL_CURRENT @@ -283,15 +341,30 @@ strftime (s, maxsize, format, tp) size_t month_len = strlen (f_month); const char *zone; size_t zonelen; - register size_t i = 0; - register char *p = s; - register const char *f; - - zone = 0; -#if HAVE_TM_ZONE + size_t i = 0; + char *p = s; + const char *f; + + zone = NULL; +#if !defined _LIBC && HAVE_TM_ZONE + /* XXX We have some problems here. First, the string pointed to by + tm_zone is dynamically allocated while loading the zone data. But + when another zone is loaded since the information in TP were + computed this would be a stale pointer. + The second problem is the POSIX test suite which assumes setting + the environment variable TZ to a new value before calling strftime() + will influence the result (the %Z format) even if the information in + TP is computed with a totally different time zone. --drepper@gnu */ zone = (const char *) tp->tm_zone; #endif #if HAVE_TZNAME + /* POSIX.1 8.1.1 requires that whenever strftime() is called, the + time zone names contained in the external variable `tzname' shall + be set as if the tzset() function had been called. */ +# if HAVE_TZSET + tzset (); +# endif + if (!(zone && *zone) && tp->tm_isdst >= 0) zone = tzname[tp->tm_isdst]; #endif @@ -317,6 +390,8 @@ strftime (s, maxsize, format, tp) char buf[1 + (sizeof (int) < sizeof (time_t) ? INT_STRLEN_BOUND (time_t) : INT_STRLEN_BOUND (int))]; + int width = -1; + int to_lowcase = 0; #if DO_MULTIBYTE @@ -393,18 +468,35 @@ strftime (s, maxsize, format, tp) /* Check for flags that can modify a number format. */ ++f; - switch (*f) + while (1) { - case '_': - case '-': - pad = *f++; - break; + switch (*f) + { + case '_': + case '-': + case '0': + pad = *f++; + break; - default: - pad = 0; + default: + pad = 0; + break; + } break; } + /* As a GNU extension we allow to specify the field width. */ + if (isdigit (*f)) + { + width = 0; + do + { + width *= 10; + width += *f - '0'; + } + while (isdigit (*++f)); + } + /* Check for modifiers. */ switch (*f) { @@ -470,10 +562,10 @@ strftime (s, maxsize, format, tp) subformat: { - size_t len = strftime (p, maxsize - i, subfmt, tp); + size_t len = strftime (NULL, maxsize - i, subfmt, tp); if (len == 0 && *subfmt) return 0; - add (len, ;); + add (len, strftime (p, maxsize - i, subfmt, tp)); } break; @@ -529,8 +621,9 @@ strftime (s, maxsize, format, tp) jump to one of these two labels. */ do_number_spacepad: - /* Force `_' flag. */ - pad = '_'; + /* Force `_' flag unless overwritten by `0' flag. */ + if (pad != '0') + pad = '_'; do_number: /* Format the number according to the MODIFIER flag. */ @@ -640,6 +733,10 @@ strftime (s, maxsize, format, tp) add (1, *p = '\n'); break; + case 'P': + to_lowcase = 1; + /* FALLTHROUGH */ + case 'p': cpy (ap_len, ampm); break; -- 2.7.4