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/* See LICENSE file for copyright and license details. */
#include <stdlib.h>
#include <string.h>
#include "utf.h"
#include "util.h"
struct fdescr {
FILE *fp;
const char *name;
};
static void
sequential(struct fdescr *dsc, int fdescrlen, Rune *delim, size_t delimlen)
{
Rune c, last;
size_t i, d;
for (i = 0; i < fdescrlen; i++) {
d = 0;
last = 0;
while (efgetrune(&c, dsc[i].fp, dsc[i].name)) {
if (last == '\n') {
if (delim[d] != '\0')
efputrune(&delim[d], stdout, "<stdout>");
d = (d + 1) % delimlen;
}
if (c != '\n')
efputrune(&c, stdout, "<stdout>");
last = c;
}
if (last == '\n')
efputrune(&last, stdout, "<stdout>");
}
}
static void
parallel(struct fdescr *dsc, int fdescrlen, Rune *delim, size_t delimlen)
{
Rune c, d;
size_t i, m;
ssize_t last;
nextline:
last = -1;
for (i = 0; i < fdescrlen; i++) {
d = delim[i % delimlen];
c = 0;
while (efgetrune(&c, dsc[i].fp, dsc[i].name)) {
for (m = last + 1; m < i; m++) {
if (delim[m % delimlen] != '\0')
efputrune(&delim[m % delimlen], stdout, "<stdout>");
}
last = i;
if (c == '\n') {
if (i != fdescrlen - 1)
c = d;
efputrune(&c, stdout, "<stdout>");
break;
}
efputrune(&c, stdout, "<stdout>");
}
if (c == 0 && last != -1) {
if (i == fdescrlen - 1)
putchar('\n');
else if (d != '\0')
efputrune(&d, stdout, "<stdout>");
last++;
}
}
if (last != -1)
goto nextline;
}
static void
usage(void)
{
eprintf("usage: %s [-s] [-d list] file ...\n", argv0);
}
int
main(int argc, char *argv[])
{
struct fdescr *dsc;
Rune *delim_rune = NULL;
size_t delim_runelen, i, delim_bytelen = 1;
int seq = 0, ret = 0;
char *delim = "\t";
ARGBEGIN {
case 's':
seq = 1;
break;
case 'd':
delim = EARGF(usage());
delim_bytelen = unescape(delim);
break;
default:
usage();
} ARGEND
if (!argc)
usage();
/* populate delimiters */
delim_rune = ereallocarray(NULL,
utfmemlen(delim, delim_bytelen) + 1, sizeof(*delim_rune));
if (!(delim_runelen = utfntorunestr(delim, delim_bytelen, delim_rune))) {
usage();
}
/* populate file list */
dsc = ereallocarray(NULL, argc, sizeof(*dsc));
for (i = 0; i < argc; i++) {
if (!strcmp(argv[i], "-")) {
argv[i] = "<stdin>";
dsc[i].fp = stdin;
} else if (!(dsc[i].fp = fopen(argv[i], "r"))) {
eprintf("fopen %s:", argv[i]);
}
dsc[i].name = argv[i];
}
if (seq) {
sequential(dsc, argc, delim_rune, delim_runelen);
} else {
parallel(dsc, argc, delim_rune, delim_runelen);
}
for (i = 0; i < argc; i++)
if (dsc[i].fp != stdin && fshut(dsc[i].fp, argv[i]))
ret |= fshut(dsc[i].fp, argv[i]);
ret |= fshut(stdin, "<stdin>") | fshut(stdout, "<stdout>");
return ret;
}
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