![[BACK]](/icons/back.gif){kind=icon}
Return to vsprintf.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / prex-old / usr / lib / libsa|
Return to vsprintf.c CVS log | Up to [local] / prex-old / usr / lib / libsa |
1.1 ! nbrk 1: /*-
! 2: * Copyright (c) 2005, Kohsuke Ohtani
! 3: * 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. Neither the name of the author nor the names of any co-contributors
! 14: * may be used to endorse or promote products derived from this software
! 15: * without specific prior written permission.
! 16: *
! 17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
! 18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
! 21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 27: * SUCH DAMAGE.
! 28: */
! 29:
! 30: /*
! 31: * vsprintf.c - Format and output data to buffer
! 32: */
! 33:
! 34: #include <limits.h>
! 35: #include <stdarg.h>
! 36: #include <string.h>
! 37: #include <stdio.h>
! 38:
! 39: #define isdigit(c) ((unsigned)((c) - '0') < 10)
! 40:
! 41: static int
! 42: divide(long *n, int base)
! 43: {
! 44: int res;
! 45:
! 46: /*
! 47: * Note: Optimized for ARM processor which does not support
! 48: * divide instructions.
! 49: *
! 50: * res = ((unsigned long)*n) % (unsigned int)base;
! 51: * *n = ((unsigned long)*n) / (unsigned int)base;
! 52: */
! 53:
! 54: if (base == 10) {
! 55: res = ((unsigned long)*n) % 10U;
! 56: *n = ((unsigned long)*n) / 10U;
! 57: } else {
! 58: res = ((unsigned long)*n) % 16U;
! 59: *n = ((unsigned long)*n) / 16U;
! 60: }
! 61: return res;
! 62: }
! 63:
! 64: static int
! 65: atoi(const char **s)
! 66: {
! 67: int i = 0;
! 68: while (isdigit((int)**s))
! 69: i = i * 10 + *((*s)++) - '0';
! 70: return i;
! 71: }
! 72:
! 73: /*
! 74: * Print formatted output - scaled down version
! 75: *
! 76: * Identifiers:
! 77: * %d - Decimal signed int
! 78: * %x - Hex integer
! 79: * %u - Unsigned integer
! 80: * %c - Character
! 81: * %s - String
! 82: *
! 83: * Flags:
! 84: * 0 - Zero pad
! 85: */
! 86: int
! 87: vsprintf(char *buf, const char *fmt, va_list args)
! 88: {
! 89: char *p, *str;
! 90: const char *digits = "0123456789abcdef";
! 91: char pad, tmp[16];
! 92: int width, base, sign, i, size;
! 93: long num;
! 94:
! 95: size = 0;
! 96: for (p = buf; *fmt && (size < LINE_MAX); fmt++, size++) {
! 97: if (*fmt != '%') {
! 98: *p++ = *fmt;
! 99: continue;
! 100: }
! 101: /* get flags */
! 102: ++fmt;
! 103: pad = ' ';
! 104: if (*fmt == '0') {
! 105: pad = '0';
! 106: fmt++;
! 107: }
! 108: /* get width */
! 109: width = -1;
! 110: if (isdigit((int)*fmt)) {
! 111: width = atoi(&fmt);
! 112: }
! 113: base = 10;
! 114: sign = 0;
! 115: switch (*fmt) {
! 116: case 'c':
! 117: *p++ = (unsigned char)va_arg(args, int);
! 118: continue;
! 119: case 's':
! 120: str = va_arg(args, char *);
! 121: if (str == NULL)
! 122: str = "<NULL>";
! 123: for (; *str; str++) {
! 124: *p++ = *str;
! 125: if (size++ >= LINE_MAX)
! 126: break;
! 127: }
! 128: continue;
! 129: case 'X':
! 130: case 'x':
! 131: base = 16;
! 132: break;
! 133: case 'd':
! 134: sign = 1;
! 135: break;
! 136: case 'u':
! 137: break;
! 138: default:
! 139: continue;
! 140: }
! 141: num = va_arg(args, long);
! 142: if (sign && num < 0) {
! 143: num = -num;
! 144: *p++ = '-';
! 145: width--;
! 146: }
! 147: i = 0;
! 148: if (num == 0)
! 149: tmp[i++] = '0';
! 150: else
! 151: while (num != 0)
! 152: tmp[i++] = digits[divide(&num, base)];
! 153: width -= i;
! 154: while (width-- > 0)
! 155: *p++ = pad;
! 156: while (i-- > 0)
! 157: *p++ = tmp[i];
! 158: }
! 159: *p = '\0';
! 160: return (p - buf);
! 161: }
! 162:
! 163: int
! 164: sprintf(char *buf, const char *fmt, ...)
! 165: {
! 166: va_list args;
! 167: int i;
! 168:
! 169: va_start(args, fmt);
! 170: i = vsprintf(buf, fmt, args);
! 171: va_end(args);
! 172: return i;
! 173: }