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	strings.c - sbase - suckless unix tools
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	---
	strings.c (1708B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include <limits.h>
	3 #include <stdio.h>
	4 #include <stdlib.h>
	5 #include <string.h>
	6
	7 #include "utf.h"
	8 #include "util.h"
	9
	10 static char *format = "";
	11
	12 static void
	13 strings(FILE fp, const char fname, size_t min)
	14 {
	15 Rune r, *rbuf;
	16 size_t i, bread;
	17 off_t off;
	18
	19 rbuf = ereallocarray(NULL, min, sizeof(*rbuf));
	20
	21 for (off = 0, i = 0; (bread = efgetrune(&r, fp, fname)); ) {
	22 off += bread;
	23 if (r == Runeerror)
	24 continue;
	25 if (!isprintrune(r)) {
	26 if (i == min)
	27 putchar('\n');
	28 i = 0;
	29 continue;
	30 }
	31 if (i == min) {
	32 efputrune(&r, stdout, "<stdout>");
	33 continue;
	34 }
	35 rbuf[i++] = r;
	36 if (i < min)
	37 continue;
	38 printf(format, (long)off - i);
	39 for (i = 0; i < min; i++)
	40 efputrune(rbuf + i, stdout, "<stdout>");
	41 }
	42 free(rbuf);
	43 }
	44
	45 static void
	46 usage(void)
	47 {
	48 eprintf("usage: %s [-a] [-n num] [-t format] [file ...]\n", argv…
	49 }
	50
	51 int
	52 main(int argc, char *argv[])
	53 {
	54 FILE *fp;
	55 size_t min = 4;
	56 int ret = 0;
	57 char f;
	58
	59 ARGBEGIN {
	60 case 'a':
	61 break;
	62 case 'n':
	63 min = estrtonum(EARGF(usage()), 1, LLONG_MAX);
	64 break;
	65 case 't':
	66 format = estrdup("%8l#: ");
	67 f = *EARGF(usage());
	68 if (f == 'd' \|\| f == 'o' \|\| f == 'x')
	69 format[3] = f;
	70 else
	71 usage();
	72 break;
	73 default:
	74 usage();
	75 } ARGEND
	76
	77 if (!argc) {
	78 strings(stdin, "<stdin>", min);
	79 } else {
	80 for (; *argv; argc--, argv++) {
	81 if (!strcmp(*argv, "-")) {
	82 *argv = "<stdin>";
	83 fp = stdin;
	84 } else if (!(fp = fopen(*argv, "r"))) {
	85 weprintf("fopen %s:", *argv);
	86 ret = 1;
	87 continue;
	88 }
	89 strings(fp, *argv, min);
	90 if (fp != stdin && fshut(fp, *argv))
	91 ret = 1;
	92 }
	93 }
	94
	95 ret \|= fshut(stdin, "<stdin>") \| fshut(stdout, "<stdout>");
	96
	97 return ret;
	98 }