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Added strftime
git-svn-id: svn://svn.cc65.org/cc65/trunk@1512 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cuz
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e7db3d83ea
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@ -39,9 +39,18 @@
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/* Standard data types */
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#ifndef _PTRDIFF_T
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#define _PTRDIFF_T
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typedef int ptrdiff_t;
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#endif
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#ifndef _WCHAR_T
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#define _WCHAR_T
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typedef char wchar_t;
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#endif
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#ifndef _SIZE_T
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#define _SIZE_T
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typedef unsigned size_t;
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#endif
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/* NULL pointer */
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#ifdef NULL
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@ -59,4 +68,4 @@ typedef unsigned size_t;
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@ -44,6 +44,12 @@
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#endif
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#define NULL 0
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/* size_t is needed */
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#ifndef _SIZE_T
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#define _SIZE_T
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typedef unsigned size_t;
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#endif
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typedef unsigned long time_t;
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typedef unsigned long clock_t;
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@ -91,7 +97,7 @@ unsigned _clocks_per_sec (void);
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time_t _systime (void);
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/* Similar to time(), but:
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/* Similar to time(), but:
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* - Is not ISO C
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* - Does not take the additional pointer
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* - Does not set errno when returning -1
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@ -104,6 +110,7 @@ char* __fastcall__ ctime (const time_t* timep);
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struct tm* __fastcall__ gmtime (const time_t* timep);
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struct tm* __fastcall__ localtime (const time_t* timep);
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time_t __fastcall__ mktime (struct tm* timep);
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size_t __fastcall__ strftime (char* buf, size_t bufsize, const char* format, const struct tm* tm);
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time_t __fastcall__ time (time_t* t);
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@ -46,6 +46,7 @@ C_OBJS = _afailed.o \
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realloc.o \
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rewind.o \
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sscanf.o \
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strftime.o \
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strxfrm.o \
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strtok.o \
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timezone.o \
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233
libsrc/common/strftime.c
Normal file
233
libsrc/common/strftime.c
Normal file
@ -0,0 +1,233 @@
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/*****************************************************************************/
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/* */
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/* strftime.c */
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/* */
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/* Convert broken down time to a string in a user specified format */
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/* */
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/* */
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/* */
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/* (C) 2002 Ullrich von Bassewitz */
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/* Wacholderweg 14 */
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/* D-70597 Stuttgart */
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/* EMail: uz@musoftware.de */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#include <string.h>
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#include <stdio.h>
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#include <time.h>
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/* Use static local variables for speed */
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#pragma staticlocals (on);
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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size_t __fastcall__ strftime (char* buf, size_t bufsize, const char* format,
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const struct tm* tm)
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{
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static const char* days[7] = {
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"Sunday", "Monday", "Tuesday", "Wednesday",
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"Thursday", "Friday", "Saturday"
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};
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static const char* months[12] = {
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"January", "February", "March", "April", "May", "June",
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"July", "August", "September", "October", "November", "December"
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};
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unsigned count;
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unsigned len;
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char c;
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char arg[40];
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const char* argptr;
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unsigned week;
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/* Copy until we reach the end of the format string or a format specifier */
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count = 0;
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while (1) {
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if (count >= bufsize) {
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/* Not enough buffer space available */
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return 0;
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}
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if ((c = *format++) == '\0') {
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/* End of format string reached */
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*buf = '\0';
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return count;
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}
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if (c == '%') {
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/* Format specifier */
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argptr = arg;
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switch (*format++) {
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case '%':
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arg[0] = '%';
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arg[1] = '\0';
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break;
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case 'A':
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argptr = days[tm->tm_wday];
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break;
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case 'B':
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argptr = months[tm->tm_mon];
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break;
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case 'D':
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sprintf (arg, "%02d/%02d/%02d", tm->tm_mon + 1,
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tm->tm_mday, tm->tm_year % 100);
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break;
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case 'F':
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/* C99 */
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sprintf (arg, "%04d-%02d-%02d", tm->tm_year + 1900,
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tm->tm_mon + 1, tm->tm_mday);
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break;
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case 'H':
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sprintf (arg, "%02d", tm->tm_hour);
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break;
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case 'I':
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sprintf (arg, "%02d", tm->tm_hour % 12);
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break;
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case 'M':
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sprintf (arg, "%02d", tm->tm_min);
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break;
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case 'P':
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/* GNU extension */
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argptr = (tm->tm_hour >= 12)? "pm" : "am";
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break;
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case 'S':
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sprintf (arg, "%02d", tm->tm_sec);
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break;
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case 'U':
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week = tm->tm_yday / 7;
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if (tm->tm_mday % 7 > tm->tm_wday) {
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++week;
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}
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sprintf (arg, "%02u", week);
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break;
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case 'W':
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/* ### This one is buggy */
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week = tm->tm_yday / 7;
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if (tm->tm_mday % 7 > tm->tm_wday) {
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++week;
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}
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sprintf (arg, "%2u", week);
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break;
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case 'X':
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sprintf (arg, "%02d:%02d:%02d", tm->tm_hour,
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tm->tm_min, tm->tm_sec);
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break;
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case 'Y':
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sprintf (arg, "%4d", tm->tm_year + 1900);
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break;
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case 'Z':
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argptr = tm->tm_isdst? _tz.dstname : _tz.tzname;
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break;
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case 'a':
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sprintf (arg, "%.3s", days[tm->tm_wday]);
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break;
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case 'b':
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sprintf (arg, "%.3s", months[tm->tm_mday]);
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break;
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case 'c':
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sprintf (arg, "%.3s %.3s%3d %02d:%02d:%02d %d",
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days[tm->tm_wday], months[tm->tm_mon],
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tm->tm_mday, tm->tm_hour, tm->tm_min,
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tm->tm_sec, tm->tm_year + 1900);
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break;
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case 'd':
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sprintf (arg, "%02d", tm->tm_mday);
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break;
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case 'j':
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sprintf (arg, "%03d", tm->tm_yday + 1);
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break;
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case 'm':
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sprintf (arg, "%02d", tm->tm_mon + 1);
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break;
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case 'p':
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argptr = (tm->tm_hour >= 12)? "PM" : "AM";
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break;
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case 'w':
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sprintf (arg, "%d", tm->tm_wday);
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break;
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case 'x':
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sprintf (arg, "%04d-%02d-%02d", tm->tm_year + 1900,
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tm->tm_mon + 1, tm->tm_mday);
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break;
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case 'y':
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sprintf (arg, "%02d", tm->tm_year % 100);
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break;
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default:
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/* Unknown format specifier, convert to empty string */
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arg[0] = '\0';
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break;
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}
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/* Check if we have enough space to copy the argument string */
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len = strlen (argptr);
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count += len;
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if (count < bufsize) {
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memcpy (buf, argptr, len);
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buf += len;
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}
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} else {
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/* No format character, just copy */
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*buf++ = c;
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++count;
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}
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}
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}
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