fluffy/hd.c

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1.8 KiB
C
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#include <getopt.h>
#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include "glyphs.h"
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int dump(FILE *inf, bool verbose) {
uint64_t p = 0;
uint8_t buf[32];
int offset = 0;
int skipping = 0;
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while (!feof(inf)) {
uint8_t *bytes = buf + offset;
size_t len;
int i;
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offset = 16 - offset;
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len = fread(bytes, 1, 16, inf);
if (0 == len)
break;
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if (!verbose && p && (len == 16) && (0 == memcmp(buf, buf + 16, 16))) {
if (!skipping) {
printf("\n");
skipping = 1;
}
p += 16;
continue;
} else {
skipping = 0;
}
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printf("%08lx ", (long unsigned int)p);
for (i = 0; i < 16; i += 1) {
if (i < len) {
printf("%02x ", bytes[i]);
} else {
printf(" ");
}
if (7 == i) {
printf(" ");
}
}
printf(" ");
for (i = 0; i < len; i += 1) {
printf("%s", fluffyglyphs[bytes[i]]);
}
if (-1 == printf("\n")) {
perror("printf");
return 1;
}
p += len;
}
printf("%08lx\n", (long unsigned int)p);
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return 0;
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}
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int main(int argc, char *argv[]) {
FILE *f;
bool verbose = false;
int c;
while ((c = getopt(argc, argv, "v")) != -1) {
switch (c) {
case -1:
break;
case 'v':
verbose = true;
break;
default:
fprintf(stderr, "Usage: %s [-v] [FILENAME]\n", argv[0]);
fprintf(stderr, "\n");
fprintf(stderr, "-v Verbose: don't elide output if output lines are identical\n");
return 1;
}
}
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if (!argv[optind] || (0 == strcmp("-", argv[optind]))) {
f = stdin;
} else {
f = fopen(argv[optind], "rb");
if (!f) {
perror("open");
return 1;
}
}
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dump(f, verbose);
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return 0;
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}