lexdump.c File Reference

#include <ctype.h>
#include <stdio.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <io.h>

Include dependency graph for lexdump.c:

Go to the source code of this file.

Macros
#define	O_BINARY   0

Functions
int	main (int argc, char **argv)

Macro Definition Documentation

#define O_BINARY   0

Definition at line 43 of file lexdump.c.

Function Documentation

int main	(	int	argc,
		char **	argv
	)

Definition at line 46 of file lexdump.c.

                                {
    char *tmpbuf;
    int idxfd, datfd;
    long offset;
    unsigned int size;
    char datbuf[255];

    if (argc != 3) {
        fprintf(stderr, "usage: %s <datapath/datafilebasename> <index>\n", argv[0]);
        exit(1);
    }

    tmpbuf = calloc(strlen(argv[1]) + 11,1);
    sprintf(tmpbuf, "%s.idx", argv[1]);
    idxfd = open(tmpbuf, O_RDONLY|O_BINARY);
    sprintf(tmpbuf, "%s.dat", argv[1]);
    datfd = open(tmpbuf, O_RDONLY|O_BINARY);
    free(tmpbuf);

    offset = atoi(argv[2]) * 6;
    lseek(idxfd, offset, SEEK_SET);
    read(idxfd, &offset, 4);
    read(idxfd, &size, 2);
    printf("offset: %ld; size: %d\n", offset, size);
    lseek(datfd, offset, SEEK_SET);
    read(datfd, datbuf, 40);
    datbuf[40] = 0;
    printf("%s\n", datbuf);
    close(datfd);
    close(idxfd);
    return 0;

}