# 2.11BSD#431 - /usr/src/lib/libc/gen/strftime.c

##### Functions

    strftime          X

       1: /*
       2:  * Copyright (c) 1989, 1993
       3:  *	The Regents of the University of California.  All rights reserved.
       4:  *
       5:  * Redistribution and use in source and binary forms, with or without
       6:  * modification, are permitted provided that the following conditions
       7:  * are met:
       8:  * 1. Redistributions of source code must retain the above copyright
       9:  *    notice, this list of conditions and the following disclaimer.
      10:  * 2. Redistributions in binary form must reproduce the above copyright
      11:  *    notice, this list of conditions and the following disclaimer in the
      12:  *    documentation and/or other materials provided with the distribution.
      13:  * 3. All advertising materials mentioning features or use of this software
      14:  *    must display the following acknowledgement:
      15:  *	This product includes software developed by the University of
      16:  *	California, Berkeley and its contributors.
      17:  * 4. Neither the name of the University nor the names of its contributors
      18:  *    may be used to endorse or promote products derived from this software
      19:  *    without specific prior written permission.
      20:  *
      21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
      22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
      25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      31:  * SUCH DAMAGE.
      32:  */
      33:
      34: #if defined(LIBC_SCCS) && !defined(lint)
      35: static char sccsid[] = "@(#)strftime.c	8.1.1 (2.11BSD) 1995/04/01";
      36: #endif /* LIBC_SCCS and not lint */
      37:
      38: #include <sys/types.h>
      39: #include <sys/time.h>
      40: #include <tzfile.h>
      41: #include <string.h>
      42:
      43: static char *Afmt[] = {
      44:     "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday",
      45:     "Saturday",
      46: };
      47: static char *Bfmt[] = {
      48:     "January", "February", "March", "April", "May", "June", "July",
      49:     "August", "September", "October", "November", "December",
      50: };
      51:
      52: static size_t gsize;
      53: static char *pt;
      54: static int _add();
      55: static int _conv();
      56: static size_t _fmt();
      57:
      58: size_t
      59: strftime(s, maxsize, format, t)
      60:     char *s;
      61:     size_t maxsize;
      62:     char *format;
      63:     struct tm *t;
      64: {
      65:
      66:     pt = s;
      67:     if ((gsize = maxsize) < 1)
      68:         return(0);
      69:     if (_fmt(format, t)) {
      70:         *pt = '\0';
      71:         return(maxsize - gsize);
      72:     }
      73:     return(0);
      74: }
      75:
      76: static size_t
      77: _fmt(format, t)
      78:     register char *format;
      79:     register struct tm *t;
      80: {
      81:     char    ch, *cp, junk[4];
      82:
      83:     for (; *format; ++format) {
      84:         if (*format == '%')
      85:             switch(ch = *++format) {
      86:             case '\0':
      87:                 --format;
      88:                 break;
      89:             case 'A':
      90:             case 'a':
      91:                 if (t->tm_wday < 0 || t->tm_wday > 6)
      92:                     return(0);
      93:                 if  (ch == 'a')
      94:                     {
      95:                     bcopy(Afmt[t->tm_wday], junk, 3);
      96:                     junk[3] = '\0';
      97:                     cp = junk;
      98:                     }
      99:                 else
     100:                     cp = Afmt[t->tm_wday];
     101:                 if (!_add(cp))
     102:                     return(0);
     103:                 continue;
     104:             case 'B':
     105:             case 'b':
     106:             case 'h':
     107:                 if (t->tm_mon < 0 || t->tm_mon > 11)
     108:                     return(0);
     109:                 if  (ch == 'b')
     110:                     {
     111:                     bcopy(Bfmt[t->tm_mon], junk, 3);
     112:                     junk[3] = '\0';
     113:                     cp = junk;
     114:                     }
     115:                 else
     116:                     cp = Bfmt[t->tm_mon];
     117:                 if (!_add(cp))
     118:                     return(0);
     119:                 continue;
     120:             case 'C':
     121:                 if (!_fmt("%a %b %e %H:%M:%S %Y", t))
     122:                     return(0);
     123:                 continue;
     124:             case 'c':
     125:                 if (!_fmt("%m/%d/%y %H:%M:%S", t))
     126:                     return(0);
     127:                 continue;
     128:             case 'D':
     129:                 if (!_fmt("%m/%d/%y", t))
     130:                     return(0);
     131:                 continue;
     132:             case 'd':
     133:                 if (!_conv(t->tm_mday, 2, '0'))
     134:                     return(0);
     135:                 continue;
     136:             case 'e':
     137:                 if (!_conv(t->tm_mday, 2, ' '))
     138:                     return(0);
     139:                 continue;
     140:             case 'H':
     141:                 if (!_conv(t->tm_hour, 2, '0'))
     142:                     return(0);
     143:                 continue;
     144:             case 'I':
     145:                 if (!_conv(t->tm_hour % 12 ?
     146:                     t->tm_hour % 12 : 12, 2, '0'))
     147:                     return(0);
     148:                 continue;
     149:             case 'j':
     150:                 if (!_conv(t->tm_yday + 1, 3, '0'))
     151:                     return(0);
     152:                 continue;
     153:             case 'k':
     154:                 if (!_conv(t->tm_hour, 2, ' '))
     155:                     return(0);
     156:                 continue;
     157:             case 'l':
     158:                 if (!_conv(t->tm_hour % 12 ?
     159:                     t->tm_hour % 12 : 12, 2, ' '))
     160:                     return(0);
     161:                 continue;
     162:             case 'M':
     163:                 if (!_conv(t->tm_min, 2, '0'))
     164:                     return(0);
     165:                 continue;
     166:             case 'm':
     167:                 if (!_conv(t->tm_mon + 1, 2, '0'))
     168:                     return(0);
     169:                 continue;
     170:             case 'n':
     171:                 if (!_add("\n"))
     172:                     return(0);
     173:                 continue;
     174:             case 'p':
     175:                 if (!_add(t->tm_hour >= 12 ? "PM" : "AM"))
     176:                     return(0);
     177:                 continue;
     178:             case 'R':
     179:                 if (!_fmt("%H:%M", t))
     180:                     return(0);
     181:                 continue;
     182:             case 'r':
     183:                 if (!_fmt("%I:%M:%S %p", t))
     184:                     return(0);
     185:                 continue;
     186:             case 'S':
     187:                 if (!_conv(t->tm_sec, 2, '0'))
     188:                     return(0);
     189:                 continue;
     190:             case 'T':
     191:             case 'X':
     192:                 if (!_fmt("%H:%M:%S", t))
     193:                     return(0);
     194:                 continue;
     195:             case 't':
     196:                 if (!_add("\t"))
     197:                     return(0);
     198:                 continue;
     199:             case 'U':
     200:                 if (!_conv((t->tm_yday + 7 - t->tm_wday) / 7,
     201:                     2, '0'))
     202:                     return(0);
     203:                 continue;
     204:             case 'W':
     205:                 if (!_conv((t->tm_yday + 7 -
     206:                     (t->tm_wday ? (t->tm_wday - 1) : 6))
     207:                     / 7, 2, '0'))
     208:                     return(0);
     209:                 continue;
     210:             case 'w':
     211:                 if (!_conv(t->tm_wday, 1, '0'))
     212:                     return(0);
     213:                 continue;
     214:             case 'x':
     215:                 if (!_fmt("%m/%d/%y", t))
     216:                     return(0);
     217:                 continue;
     218:             case 'y':
     219:                 if (!_conv((t->tm_year + TM_YEAR_BASE)
     220:                     % 100, 2, '0'))
     221:                     return(0);
     222:                 continue;
     223:             case 'Y':
     224:                 if (!_conv(t->tm_year + TM_YEAR_BASE, 4, '0'))
     225:                     return(0);
     226:                 continue;
     227:             case 'Z':
     228:                 if (!t->tm_zone || !_add(t->tm_zone))
     229:                     return(0);
     230:                 continue;
     231:             case '%':
     232:             /*
     233: 			 * X311J/88-090 (4.12.3.5): if conversion char is
     234: 			 * undefined, behavior is undefined.  Print out the
     235: 			 * character itself as printf(3) does.
     236: 			 */
     237:             default:
     238:                 break;
     239:         }
     240:         if (!gsize--)
     241:             return(0);
     242:         *pt++ = *format;
     243:     }
     244:     return(gsize);
     245: }
     246:
     247: static int
     248: _conv(n, digits, pad)
     249:     int n, digits, pad;
     250: {
     251:     static char buf[10];
     252:     register char *p;
     253:
     254:     for (p = buf + sizeof(buf) - 2; n > 0 && p > buf; n /= 10, --digits)
     255:         *p-- = n % 10 + '0';
     256:     while (p > buf && digits-- > 0)
     257:         *p-- = pad;
     258:     return(_add(++p));
     259: }
     260:
     261: static int
     262: _add(str)
     263:     register char *str;
     264: {
     265:     for (;; ++pt, --gsize) {
     266:         if (!gsize)
     267:             return(0);
     268:         if (!(*pt = *str++))
     269:             return(1);
     270:     }
     271: }

#### Defined functions

_add defined in line 261; used 8 times

- in line 54, 101, 117, 171-175(2), 196, 228, 258

_conv defined in line 247; used 16 times

- in line 55, 133-167(9), 187, 200-205(2), 211, 219-224(2)

_fmt defined in line 76; used 9 times

- in line 56, 69, 121-129(3), 179-183(2), 192, 215

strftime defined in line 58; used 2 times

- in /usr/src/bin/ar/contents.c line 81
- in /usr/src/lib/libc/gen/syslog.c line 123

#### Defined variables

Afmt defined in line 43; used 2 times

- in line 95-100(2)

Bfmt defined in line 47; used 2 times

- in line 111-116(2)

gsize defined in line 52; used 6 times

- in line 67-71(2), 240-244(2), 265-266(2)

pt defined in line 53; used 5 times

- in line 66-70(2), 242, 265-268(2)

sccsid defined in line 35; never used

Last modified: 1995-04-03 Generated: 2016-12-26 | Generated by src2html V0.67 page hit count: 1041 |