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#include "hexdump_pretty.h"
#include <assert.h>
#include <ctype.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define LINELEN 0x8
static struct segment line_segments[LINELEN];
static size_t file_idx = 0;
static size_t line_idx = 0;
static size_t current_segment = 0;
enum color next_color(void) {
static uint8_t cc = 0;
cc += 1;
cc %= 6;
return cc + 1;
}
void color_put(enum color c) {
printf("\x1b[0;3%im", c);
}
void color_reset(void) {
printf("\x1b[m");
}
void cleanup_line(void) {
for (int i = 0; i < current_segment; i++) {
free(line_segments[i].data);
}
}
void put_byte(uint8_t byte) {
static bool flip = 0;
printf("%02x", byte);
flip = !flip;
if (! flip) {
printf(" ");
}
}
void flush_line() {
printf("%06lx: ", file_idx);
file_idx += LINELEN;
for (int i = 0; i < current_segment; i++) {
color_put(line_segments[i].c);
for (int b = 0; b < line_segments[i].len; b++) {
put_byte(line_segments[i].data[b]);
}
color_reset();
}
for (int i = 0; i < current_segment; i++) {
color_put(line_segments[i].c);
for (int b = 0; b < line_segments[i].len; b++) {
uint8_t ch = line_segments[i].data[b];
if (isprint(ch)) {
printf("%c", ch);
} else {
printf(".");
}
}
color_reset();
}
printf("\n");
}
void add_segment(struct segment segment) {
line_segments[current_segment++] = segment;
line_idx += segment.len;
if (line_idx == LINELEN) {
flush_line();
cleanup_line();
current_segment = 0;
line_idx = 0;
}
}
/*
* Buf MUST be a malloc:ed buffer, which is invalidated on this call.
*/
void write_chunk(uint8_t *buf, size_t len) {
if (line_idx + len >= LINELEN) {
enum color c = next_color();
size_t len1 = LINELEN - line_idx,
len2 = len - len1;
uint8_t *buf1 = malloc(len1),
*buf2 = malloc(len2);
memcpy(buf1, buf, len1);
memcpy(buf2, buf + len1, len2);
free(buf);
struct segment
seg1 = {
.c = c,
.len = len1,
.data = buf1,
},
seg2 = {
.c = c,
.len = len2,
.data = buf2,
};
add_segment(seg1);
add_segment(seg2);
} else {
struct segment seg = {
.c = next_color(),
.len = len,
.data = buf,
};
add_segment(seg);
}
}
void write_chunk_s(uint8_t *buf, size_t len) {
assert (len >= 0);
uint8_t *true_buf = malloc(len);
memcpy(true_buf, buf, len);
write_chunk(true_buf, len);
}
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