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#include <sys/types.h>
#include <unistd.h>
#include "strerr.h"
#include "uint32.h"
#include "buffer.h"
#include "fmt.h"
#define USAGE ""
#define FATAL "cdbdump: fatal: "
#define BUFSIZE 1024
const char *progname;
char buf[BUFSIZE];
void usage() { strerr_die4x(100, "usage: ", progname, USAGE, "\n"); }
void getb(char *b, unsigned int len) {
unsigned int l;
while (len) {
switch ((l =buffer_get(buffer_0, b, len))) {
case 0: strerr_die2x(111, FATAL, "unable to read input: truncated file");
case -1: strerr_die2sys(111, FATAL, "unable to read input: ");
}
len -=l; b +=l;
}
}
void put1(char *s, unsigned int l) {
if (buffer_put(buffer_1, s, l) == -1)
strerr_die2sys(111, FATAL, "unable to write output: ");
}
void copyb(uint32 len) {
uint32 l;
while (len) {
l =len < BUFSIZE ? len : BUFSIZE;
getb(buf, l);
put1(buf, l);
len -=l;
}
}
int main(int argc, char **argv) {
uint32 pos;
uint32 eodata;
uint32 keylen;
uint32 datalen;
char num[FMT_ULONG];
progname =*argv++;
if (*argv) usage();
pos =0;
/* read data size */
getb(buf, 4);
pos +=4;
uint32_unpack(buf, &eodata);
/* data starts after 2048 bytes */
while (pos < 2048) {
getb(buf, (2048 -pos) < BUFSIZE ? (2048 -pos) : BUFSIZE);
pos +=(2048 -pos) < BUFSIZE ? (2048 -pos) : BUFSIZE;
}
/* read keylen, datalen, key, data up to data size */
while (pos < eodata) {
/* keylen */
getb(buf, 4);
pos +=4;
uint32_unpack(buf, &keylen);
/* datalen */
getb(buf, 4);
pos +=4;
uint32_unpack(buf, &datalen);
/* format output keylen, datalen */
put1("+", 1);
put1(num, fmt_ulong(num, keylen));
put1(",", 1);
put1(num, fmt_ulong(num, datalen));
put1(":", 1);
/* format output key and data */
copyb(keylen);
pos +=keylen;
put1("->", 2);
copyb(datalen);
pos +=datalen;
put1("\n", 1);
/* next entry */
}
/* final empty line */
put1("\n", 1);
if (buffer_flush(buffer_1) == -1)
strerr_die2sys(111, FATAL, "unable to flush output: ");
_exit(0);
}
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