71 lines
2.2 KiB
C
71 lines
2.2 KiB
C
/*
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* Copyright (C) 2021 Alyssa Rosenzweig <alyssa@rosenzweig.io>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef __HEXDUMP_H
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#define __HEXDUMP_H
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static void
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hexdump(FILE *fp, const uint8_t *hex, size_t cnt, bool with_strings)
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{
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for (unsigned i = 0; i < cnt; ++i) {
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if ((i & 0xF) == 0)
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fprintf(fp, "%06X ", i);
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uint8_t v = hex[i];
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if (v == 0 && (i & 0xF) == 0) {
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/* Check if we're starting an aligned run of zeroes */
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unsigned zero_count = 0;
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for (unsigned j = i; j < cnt; ++j) {
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if (hex[j] == 0)
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zero_count++;
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else
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break;
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}
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if (zero_count >= 32) {
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fprintf(fp, "*\n");
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i += (zero_count & ~0xF) - 1;
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continue;
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}
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}
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fprintf(fp, "%02X ", hex[i]);
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if ((i & 0xF) == 0xF && with_strings) {
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fprintf(fp, " | ");
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for (unsigned j = i & ~0xF; j <= i; ++j) {
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uint8_t c = hex[j];
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fputc((c < 32 || c > 128) ? '.' : c, fp);
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}
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}
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if ((i & 0xF) == 0xF)
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fprintf(fp, "\n");
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}
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fprintf(fp, "\n");
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}
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#endif
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