lib/libc/stdio/xprintf_hexdump.c

   1 /*-
   2  * Copyright (c) 2005 Poul-Henning Kamp
   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  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/lib/libc/stdio/xprintf_hexdump.c,v 1.1 2005/12/16 18:56:38 phk Exp $
  27  */
  28
  29 #include "namespace.h"
  30 #include <stdio.h>
  31 #include <wchar.h>
  32 #include <stdint.h>
  33 #include <assert.h>
  34 #include <sys/time.h>
  35 #include "un-namespace.h"
  36 #include "printf.h"
  37
  38 int
  39 __printf_arginfo_hexdump(const struct printf_info *pi, size_t n, int *argt)
  40 {
  41
  42         assert(n >= 2);
  43         argt[0] = PA_POINTER;
  44         argt[1] = PA_INT;
  45         return (2);
  46 }
  47
  48 int
  49 __printf_render_hexdump(struct __printf_io *io, const struct printf_info *pi,
  50                         const void *const *arg)
  51 {
  52         unsigned char *p;
  53         unsigned u, l, j, a;
  54         char buf[100], *q;
  55         int ret;
  56
  57         if (pi->width > 0 && pi->width < 16)
  58                 l = pi->width;
  59         else
  60                 l = 16;
  61         p = *((unsigned char **)arg[0]);
  62         u = *((unsigned *)arg[1]);
  63
  64         ret = 0;
  65         a = 0;
  66         while (u > 0) {
  67                 q = buf;
  68                 if (pi->showsign)
  69                         q += sprintf(q, " %04x", a);
  70                 for (j = 0; j < l && j < u; j++)
  71                         q += sprintf(q, " %02x", p[j]);
  72                 if (pi->alt) {
  73                         for (; j < l; j++)
  74                                 q += sprintf(q, "   ");
  75                         q += sprintf(q, "  |");
  76                         for (j = 0; j < l && j < u; j++) {
  77                                 if (p[j] < ' ' || p[j] > '~')
  78                                         *q++ = '.';
  79                                 else
  80                                         *q++ = p[j];
  81                         }
  82                         for (; j < l; j++)
  83                                 *q++ = ' ';
  84                         *q++ = '|';
  85                 }
  86                 if (l < u)
  87                         j = l;
  88                 else
  89                         j = u;
  90                 p += j;
  91                 u -= j;
  92                 a += j;
  93                 if (u > 0)
  94                         *q++ = '\n';
  95                 ret += __printf_puts(io, buf + 1, q - (buf + 1));
  96                 __printf_flush(io);
  97         }
  98         return (ret);
  99 }