65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
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#include <stdio.h>
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#include <ctype.h>
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void print_line(unsigned char * buf, unsigned int width, unsigned int sizer, unsigned int offset) {
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fprintf(stdout, "%08x: ", sizer);
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for (unsigned int i = 0; i < width; ) {
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if (i >= offset) {
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fprintf(stdout, " ");
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} else {
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fprintf(stdout, "%02x", buf[i]);
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}
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i++;
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if (i == width) break; /* in case of odd width */
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if (i >= offset) {
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fprintf(stdout, " ");
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} else {
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fprintf(stdout, "%02x ", buf[i]);
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}
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i++;
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}
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fprintf(stdout, " ");
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for (unsigned int i = 0; i < width; i++) {
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if (i >= offset) {
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fprintf(stdout, " ");
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} else {
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if (isprint(buf[i])) {
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fprintf(stdout, "%c", buf[i]);
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} else {
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fprintf(stdout, ".");
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}
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}
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}
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fprintf(stdout, "\n");
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}
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int main(int argc, char * argv[]) {
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FILE * f;
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unsigned int width = 16; /* TODO make configurable */
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if (argc > 1) {
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f = fopen(argv[1], "r");
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if (!f) return 1;
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} else {
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f = stdin;
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}
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unsigned int sizer = 0;
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unsigned int offset = 0;
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unsigned char buf[width];
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while (!feof(f)) {
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unsigned int r = fread(buf+offset, 1, width-offset, f);
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offset += r;
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if (offset == width) {
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print_line(buf, width, sizer, offset);
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offset = 0;
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sizer += width;
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}
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}
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if (offset != 0) {
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print_line(buf, width, sizer, offset);
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}
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return 0;
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}
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