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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <zlib.h>
#define CD_FRAMESIZE_RAW 2352
struct ztab_entry {
unsigned int offset;
unsigned short size;
} __attribute__((packed));
int main(int argc, char *argv[])
{
unsigned char outbuf[CD_FRAMESIZE_RAW * 2];
unsigned char inbuf[CD_FRAMESIZE_RAW];
struct ztab_entry *ztable;
char *out_basename, *out_fname, *out_tfname;
FILE *fin, *fout;
long in_bytes, out_bytes;
long s, total_sectors;
int ret, len;
if (argc < 2) {
fprintf(stderr, "usage:\n%s <cd_img> [out_basename]\n", argv[0]);
return 1;
}
fin = fopen(argv[1], "rb");
if (fin == NULL) {
fprintf(stderr, "fopen %s: ", argv[1]);
perror(NULL);
return 1;
}
if (argv[2] != NULL)
out_basename = argv[2];
else
out_basename = argv[1];
len = strlen(out_basename) + 3;
out_fname = malloc(len);
if (out_fname == NULL) {
fprintf(stderr, "OOM\n");
return 1;
}
snprintf(out_fname, len, "%s.Z", out_basename);
fout = fopen(out_fname, "wb");
if (fout == NULL) {
fprintf(stderr, "fopen %s: ", out_fname);
perror(NULL);
return 1;
}
if (fseek(fin, 0, SEEK_END) != 0) {
fprintf(stderr, "fseek failed: ");
perror(NULL);
return 1;
}
in_bytes = ftell(fin);
if (in_bytes % CD_FRAMESIZE_RAW) {
fprintf(stderr, "warning: input size %ld is not "
"multiple of sector size\n", in_bytes);
}
total_sectors = in_bytes / CD_FRAMESIZE_RAW;
fseek(fin, 0, SEEK_SET);
ztable = calloc(total_sectors, sizeof(ztable[0]));
if (ztable == NULL) {
fprintf(stderr, "OOM\n");
return 1;
}
out_bytes = 0;
for (s = 0; s < total_sectors; s++) {
uLongf dest_len = sizeof(outbuf);
ret = fread(inbuf, 1, sizeof(inbuf), fin);
if (ret != sizeof(inbuf)) {
printf("\n");
fprintf(stderr, "fread returned %d\n", ret);
return 1;
}
ret = compress2(outbuf, &dest_len, inbuf, sizeof(inbuf), 9);
if (ret != Z_OK) {
printf("\n");
fprintf(stderr, "compress2 failed: %d\n", ret);
return 1;
}
ret = fwrite(outbuf, 1, dest_len, fout);
if (ret != dest_len) {
printf("\n");
fprintf(stderr, "fwrite returned %d\n", ret);
return 1;
}
ztable[s].offset = out_bytes;
ztable[s].size = dest_len;
out_bytes += dest_len;
// print progress
if ((s & 0x1ff) == 0) {
printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
printf("%3ld%% %ld/%ld", s * 100 / total_sectors, s, total_sectors);
fflush(stdout);
}
}
fclose(fin);
fclose(fout);
// write .table
len = strlen(out_fname) + 7;
out_tfname = malloc(len);
if (out_tfname == NULL) {
printf("\n");
fprintf(stderr, "OOM\n");
return 1;
}
snprintf(out_tfname, len, "%s.table", out_fname);
fout = fopen(out_tfname, "wb");
if (fout == NULL) {
fprintf(stderr, "fopen %s: ", out_tfname);
perror(NULL);
return 1;
}
ret = fwrite(ztable, sizeof(ztable[0]), total_sectors, fout);
if (ret != total_sectors) {
printf("\n");
fprintf(stderr, "fwrite returned %d\n", ret);
return 1;
}
fclose(fout);
printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
printf("%3ld%% %ld/%ld\n", s * 100 / total_sectors, s, total_sectors);
printf("%ld bytes from %ld (%.1f%%)\n", out_bytes, in_bytes,
(double)out_bytes * 100.0 / in_bytes);
return 0;
}
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