42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
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#include <stdlib.h>
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#include "dtypes.h"
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#include "ios.h"
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#include "utils.h"
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static char hexdig[] = "0123456789abcdef";
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/*
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display a given number of bytes from a buffer, with the first
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address label being startoffs
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*/
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void hexdump(ios_t *dest, char *buffer, size_t len, size_t startoffs)
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{
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size_t offs=0;
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size_t i, pos, nc;
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char ch, linebuffer[16];
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char hexc[4];
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hexc[2] = hexc[3] = ' ';
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do {
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ios_printf(dest, "%.8x ", offs+startoffs);
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pos = 10;
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for(i=0; i < 16 && (offs+i) < len; i++) {
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ch = buffer[offs + i];
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linebuffer[i] = (ch<32 || ch>=0x7f) ? '.' : ch;
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hexc[0] = hexdig[((unsigned char)ch)>>4];
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hexc[1] = hexdig[ch&0x0f];
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nc = (i==7 || i==15) ? 4 : 3;
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ios_write(dest, hexc, nc);
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pos += nc;
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}
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for(; i < 16; i++)
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linebuffer[i] = ' ';
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for(i=0; i < 60-pos; i++)
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ios_putc(' ', dest);
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ios_putc('|', dest);
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ios_write(dest, linebuffer, 16);
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ios_write(dest, "|\n", 2);
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offs += 16;
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} while (offs < len);
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}
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