sbase/paste.c

142 lines
2.3 KiB
C
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/* See LICENSE file for copyright and license details. */
#include <locale.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.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 (readrune(dsc[i].name, dsc[i].fp, &c)) {
if (last == '\n') {
if (delim[d] != '\0')
writerune("<stdout>", stdout, &delim[d]);
d = (d + 1) % delimlen;
}
if (c != '\n')
writerune("<stdout>", stdout, &c);
last = c;
}
if (last == '\n')
writerune("<stdout>", stdout, &last);
}
}
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;
for (; readrune(dsc[i].name, dsc[i].fp, &c) ;) {
for (m = last + 1; m < i; m++)
writerune("<stdout>", stdout, &(delim[m % delimlen]));
last = i;
if (c == '\n') {
if (i != fdescrlen - 1)
c = d;
writerune("<stdout>", stdout, &c);
break;
}
writerune("<stdout>", stdout, &c);
}
if (c == 0 && last != -1) {
if (i == fdescrlen - 1)
putchar('\n');
else
writerune("<stdout>", stdout, &d);
last++;
}
}
if (last != -1)
goto nextline;
}
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static void
usage(void)
{
eprintf("usage: %s [-s] [-d list] file ...\n", argv0);
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}
int
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main(int argc, char *argv[])
{
struct fdescr *dsc;
Rune *delim;
size_t i, len;
int seq = 0;
char *adelim = "\t";
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ARGBEGIN {
case 's':
seq = 1;
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break;
case 'd':
adelim = EARGF(usage());
break;
default:
usage();
} ARGEND;
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if (argc == 0)
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usage();
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/* populate delimiters */
unescape(adelim);
len = chartorunearr(adelim, &delim);
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/* populate file list */
dsc = emalloc(argc * sizeof(*dsc));
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for (i = 0; i < argc; i++) {
if (strcmp(argv[i], "-") == 0)
dsc[i].fp = stdin;
else
dsc[i].fp = fopen(argv[i], "r");
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if (!dsc[i].fp)
eprintf("fopen %s:", argv[i]);
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dsc[i].name = argv[i];
}
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if (seq)
sequential(dsc, argc, delim, len);
else
parallel(dsc, argc, delim, len);
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for (i = 0; i < argc; i++) {
if (dsc[i].fp != stdin)
(void)fclose(dsc[i].fp);
}
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return 0;
}