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/*****************************************************************************
* Bible dictionary index utility
*/
#ifndef __GNUC__
#include <io.h>
#else
#include <unistd.h>
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
char findbreak(int fd, long *offset, short *size)
{
char buf[3];
char rc = 1;
long offset2;
memset(buf, 0, sizeof(buf));
while (read(fd, &buf[sizeof(buf)-1], 1) == 1) {
if ((buf[0] == 10) && (isdigit(buf[1])) && (isdigit(buf[2]))) {
if (read(fd, buf, 1) == 1) {
*offset = lseek(fd, 0, SEEK_CUR) - 3;
rc = 0;
if (size) {
if (!findbreak(fd, &offset2, 0))
*size = offset2 - *offset;
else *size = lseek(fd, 0, SEEK_END) - *offset;
lseek(fd, *offset, SEEK_SET);
}
break;
}
break;
}
memmove(buf, &buf[1], sizeof(buf)-1);
}
return rc;
}
void main(int argc, char **argv)
{
int fd, ifd;
long offset;
short size;
char *buf;
char entbuf[6];
if (argc < 2) {
fprintf(stderr, "usage: %s <file to process (no .dat)>\n", argv[0]);
exit(1);
}
buf = (char *) calloc(strlen(argv[1]) + 5, 1);
sprintf(buf, "%s.dat", argv[1]);
fd = open(buf, O_RDONLY);
sprintf(buf, "%s.idx", argv[1]);
ifd = open(buf, O_CREAT|O_WRONLY);
offset = 0; /* write offset for intro */
write(ifd, &offset, 4);
findbreak(fd, &offset, 0);
lseek(fd, 0L, SEEK_SET);
size = offset - 12;
write(ifd, &size, 2);
entbuf[5] = 0; /* delimit string for read below */
while(!findbreak(fd, &offset, &size)) {
write(ifd, &offset, 4);
write(ifd, &size, 2);
read(fd, entbuf, 5);
printf("Found: %s...(%ld:%d)\n", entbuf, offset, size);
}
free(buf);
close(ifd);
close(fd);
}
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