| 0,0 → 1,226 |
|---|
| /* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */ |
| #include <string.h> |
| #include <time.h> |
| |
| #define TM_YEAR_BASE 1900 |
| |
| static const char *afmt[] = { |
| "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", |
| }; |
| static const char *Afmt[] = { |
| "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", |
| "Saturday", |
| }; |
| static const char *bfmt[] = { |
| "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", |
| "Oct", "Nov", "Dec", |
| }; |
| static const char *Bfmt[] = { |
| "January", "February", "March", "April", "May", "June", "July", |
| "August", "September", "October", "November", "December", |
| }; |
| |
| static size_t gsize; |
| static char *pt; |
| |
| static int |
| _add(const char *str) |
| { |
| for (;; ++pt, --gsize) |
| { |
| if (!gsize) |
| return 0; |
| if (!(*pt = *str++)) |
| return 1; |
| } |
| } |
| |
| static int |
| _conv(int n, int digits, char pad) |
| { |
| static char buf[10]; |
| char *p; |
| |
| for (p = buf + sizeof(buf) - 2; n > 0 && p > buf; n /= 10, --digits) |
| *p-- = n % 10 + '0'; |
| while (p > buf && digits-- > 0) |
| *p-- = pad; |
| return _add(++p); |
| } |
| |
| static size_t |
| _fmt(const char *format, const struct tm *t) |
| { |
| for (; *format; ++format) |
| { |
| if (*format == '%') |
| switch(*++format) |
| { |
| case '\0': |
| --format; |
| break; |
| case 'A': |
| if (t->tm_wday < 0 || t->tm_wday > 6) |
| return 0; |
| if (!_add(Afmt[t->tm_wday])) |
| return 0; |
| continue; |
| case 'a': |
| if (t->tm_wday < 0 || t->tm_wday > 6) |
| return 0; |
| if (!_add(afmt[t->tm_wday])) |
| return 0; |
| continue; |
| case 'B': |
| if (t->tm_mon < 0 || t->tm_mon > 11) |
| return 0; |
| if (!_add(Bfmt[t->tm_mon])) |
| return 0; |
| continue; |
| case 'b': |
| case 'h': |
| if (t->tm_mon < 0 || t->tm_mon > 11) |
| return 0; |
| if (!_add(bfmt[t->tm_mon])) |
| return 0; |
| continue; |
| case 'C': |
| if (!_fmt("%a %b %e %H:%M:%S %Y", t)) |
| return 0; |
| continue; |
| case 'c': |
| if (!_fmt("%m/%d/%y %H:%M:%S", t)) |
| return 0; |
| continue; |
| case 'e': |
| if (!_conv(t->tm_mday, 2, ' ')) |
| return 0; |
| continue; |
| case 'D': |
| if (!_fmt("%m/%d/%y", t)) |
| return 0; |
| continue; |
| case 'd': |
| if (!_conv(t->tm_mday, 2, '0')) |
| return 0; |
| continue; |
| case 'H': |
| if (!_conv(t->tm_hour, 2, '0')) |
| return 0; |
| continue; |
| case 'I': |
| if (!_conv(t->tm_hour % 12 ? |
| t->tm_hour % 12 : 12, 2, '0')) |
| return 0; |
| continue; |
| case 'j': |
| if (!_conv(t->tm_yday + 1, 3, '0')) |
| return 0; |
| continue; |
| case 'k': |
| if (!_conv(t->tm_hour, 2, ' ')) |
| return 0; |
| continue; |
| case 'l': |
| if (!_conv(t->tm_hour % 12 ? |
| t->tm_hour % 12 : 12, 2, ' ')) |
| return 0; |
| continue; |
| case 'M': |
| if (!_conv(t->tm_min, 2, '0')) |
| return 0; |
| continue; |
| case 'm': |
| if (!_conv(t->tm_mon + 1, 2, '0')) |
| return 0; |
| continue; |
| case 'n': |
| if (!_add("\n")) |
| return 0; |
| continue; |
| case 'p': |
| if (!_add(t->tm_hour >= 12 ? "PM" : "AM")) |
| return 0; |
| continue; |
| case 'R': |
| if (!_fmt("%H:%M", t)) |
| return 0; |
| continue; |
| case 'r': |
| if (!_fmt("%I:%M:%S %p", t)) |
| return 0; |
| continue; |
| case 'S': |
| if (!_conv(t->tm_sec, 2, '0')) |
| return 0; |
| continue; |
| case 'T': |
| case 'X': |
| if (!_fmt("%H:%M:%S", t)) |
| return 0; |
| continue; |
| case 't': |
| if (!_add("\t")) |
| return 0; |
| continue; |
| case 'U': |
| if (!_conv((t->tm_yday + 7 - t->tm_wday) / 7, |
| 2, '0')) |
| return 0; |
| continue; |
| case 'W': |
| if (!_conv((t->tm_yday + 7 - |
| (t->tm_wday ? (t->tm_wday - 1) : 6)) |
| / 7, 2, '0')) |
| return 0; |
| continue; |
| case 'w': |
| if (!_conv(t->tm_wday, 1, '0')) |
| return 0; |
| continue; |
| case 'x': |
| if (!_fmt("%m/%d/%y", t)) |
| return 0; |
| continue; |
| case 'y': |
| if (!_conv((t->tm_year + TM_YEAR_BASE) |
| % 100, 2, '0')) |
| return 0; |
| continue; |
| case 'Y': |
| if (!_conv(t->tm_year + TM_YEAR_BASE, 4, '0')) |
| return 0; |
| continue; |
| case 'Z': |
| if (!t->tm_zone || !_add(t->tm_zone)) |
| return 0; |
| continue; |
| case '%': |
| /* |
| * X311J/88-090 (4.12.3.5): if conversion char is |
| * undefined, behavior is undefined. Print out the |
| * character itself as printf(3) does. |
| */ |
| default: |
| break; |
| } |
| if (!gsize--) |
| return 0; |
| *pt++ = *format; |
| } |
| return gsize; |
| } |
| |
| size_t |
| strftime(char *s, size_t maxsize, const char *format, const struct tm *t) |
| { |
| pt = s; |
| if ((gsize = maxsize) < 1) |
| return 0; |
| if (_fmt(format, t)) |
| { |
| *pt = '\0'; |
| return maxsize - gsize; |
| } |
| return 0; |
| } |