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1.8 ! cheloha 1: /* $OpenBSD: nl.c,v 1.7 2019/04/21 01:08:46 deraadt Exp $ */
1.1 jca 2: /* $NetBSD: nl.c,v 1.11 2011/08/16 12:00:46 christos Exp $ */
3:
4: /*-
5: * Copyright (c) 1999 The NetBSD Foundation, Inc.
6: * All rights reserved.
7: *
8: * This code is derived from software contributed to The NetBSD Foundation
9: * by Klaus Klein.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30: * POSSIBILITY OF SUCH DAMAGE.
31: */
32:
33: #include <err.h>
34: #include <errno.h>
35: #include <limits.h>
36: #include <locale.h>
37: #include <regex.h>
38: #include <stdio.h>
39: #include <stdlib.h>
40: #include <string.h>
1.2 millert 41: #include <unistd.h>
1.1 jca 42: #include <wchar.h>
43:
44: typedef enum {
45: number_all, /* number all lines */
46: number_nonempty, /* number non-empty lines */
47: number_none, /* no line numbering */
48: number_regex /* number lines matching regular expression */
49: } numbering_type;
50:
51: struct numbering_property {
52: const char * const name; /* for diagnostics */
53: numbering_type type; /* numbering type */
54: regex_t expr; /* for type == number_regex */
55: };
56:
57: /* line numbering formats */
58: #define FORMAT_LN "%-*d" /* left justified, leading zeros suppressed */
59: #define FORMAT_RN "%*d" /* right justified, leading zeros suppressed */
60: #define FORMAT_RZ "%0*d" /* right justified, leading zeros kept */
61:
62: #define FOOTER 0
63: #define BODY 1
64: #define HEADER 2
65: #define NP_LAST HEADER
66:
67: static struct numbering_property numbering_properties[NP_LAST + 1] = {
68: { "footer", number_none, { 0, 0, 0, 0 } },
69: { "body", number_nonempty, { 0, 0, 0, 0 } },
70: { "header", number_none, { 0, 0, 0, 0 } },
71: };
72:
73: void filter(void);
74: void parse_numbering(const char *, int);
75: __dead void usage(void);
76:
77: /*
78: * Delimiter characters that indicate the start of a logical page section.
79: */
80: static char delim[2 * MB_LEN_MAX];
81: static int delimlen;
82:
83: /*
84: * Configurable parameters.
85: */
86:
87: /* line numbering format */
88: static const char *format = FORMAT_RN;
89:
90: /* increment value used to number logical page lines */
91: static int incr = 1;
92:
93: /* number of adjacent blank lines to be considered (and numbered) as one */
94: static unsigned int nblank = 1;
95:
96: /* whether to restart numbering at logical page delimiters */
97: static int restart = 1;
98:
99: /* characters used in separating the line number and the corrsp. text line */
100: static const char *sep = "\t";
101:
102: /* initial value used to number logical page lines */
103: static int startnum = 1;
104:
105: /* number of characters to be used for the line number */
106: /* should be unsigned but required signed by `*' precision conversion */
107: static int width = 6;
108:
109:
110: int
111: main(int argc, char *argv[])
112: {
113: int c;
114: size_t clen;
115: char delim1[MB_LEN_MAX] = { '\\' }, delim2[MB_LEN_MAX] = { ':' };
116: size_t delim1len = 1, delim2len = 1;
117: const char *errstr;
118:
119: (void)setlocale(LC_ALL, "");
1.5 deraadt 120:
1.6 deraadt 121: if (pledge("stdio rpath", NULL) == -1)
122: err(1, "pledge");
1.1 jca 123:
124: while ((c = getopt(argc, argv, "pb:d:f:h:i:l:n:s:v:w:")) != -1) {
125: switch (c) {
126: case 'p':
127: restart = 0;
128: break;
129: case 'b':
130: parse_numbering(optarg, BODY);
131: break;
132: case 'd':
133: clen = mbrlen(optarg, MB_CUR_MAX, NULL);
1.3 guenther 134: if (clen == (size_t)-1 || clen == (size_t)-2)
135: errc(EXIT_FAILURE, EILSEQ, NULL);
1.1 jca 136: if (clen != 0) {
137: memcpy(delim1, optarg, delim1len = clen);
138: clen = mbrlen(optarg + delim1len,
139: MB_CUR_MAX, NULL);
1.3 guenther 140: if (clen == (size_t)-1 || clen == (size_t)-2)
141: errc(EXIT_FAILURE, EILSEQ, NULL);
1.1 jca 142: if (clen != 0) {
143: memcpy(delim2, optarg + delim1len,
144: delim2len = clen);
145: if (optarg[delim1len + clen] != '\0') {
146: errx(EXIT_FAILURE,
147: "invalid delimiter: %s",
148: optarg);
149: }
150: }
151: }
152: break;
153: case 'f':
154: parse_numbering(optarg, FOOTER);
155: break;
156: case 'h':
157: parse_numbering(optarg, HEADER);
158: break;
159: case 'i':
160: incr = strtonum(optarg, INT_MIN, INT_MAX, &errstr);
161: if (errstr)
162: errx(EXIT_FAILURE, "increment value is %s: %s",
163: errstr, optarg);
164: break;
165: case 'l':
166: nblank = strtonum(optarg, 0, UINT_MAX, &errstr);
167: if (errstr)
168: errx(EXIT_FAILURE,
169: "blank line value is %s: %s",
170: errstr, optarg);
171: break;
172: case 'n':
173: if (strcmp(optarg, "ln") == 0) {
174: format = FORMAT_LN;
175: } else if (strcmp(optarg, "rn") == 0) {
176: format = FORMAT_RN;
177: } else if (strcmp(optarg, "rz") == 0) {
178: format = FORMAT_RZ;
179: } else
180: errx(EXIT_FAILURE,
181: "illegal format -- %s", optarg);
182: break;
183: case 's':
184: sep = optarg;
185: break;
186: case 'v':
187: startnum = strtonum(optarg, INT_MIN, INT_MAX, &errstr);
188: if (errstr)
189: errx(EXIT_FAILURE,
190: "initial logical page value is %s: %s",
191: errstr, optarg);
192: break;
193: case 'w':
194: width = strtonum(optarg, 1, INT_MAX, &errstr);
195: if (errstr)
196: errx(EXIT_FAILURE, "width is %s: %s", errstr,
197: optarg);
198: break;
199: default:
200: usage();
201: /* NOTREACHED */
202: }
203: }
204: argc -= optind;
205: argv += optind;
206:
207: switch (argc) {
208: case 0:
209: break;
210: case 1:
211: if (strcmp(argv[0], "-") != 0 &&
212: freopen(argv[0], "r", stdin) == NULL)
213: err(EXIT_FAILURE, "%s", argv[0]);
214: break;
215: default:
216: usage();
217: /* NOTREACHED */
218: }
1.7 deraadt 219:
220: if (pledge("stdio", NULL) == -1)
221: err(1, "pledge");
1.1 jca 222:
223: /* Generate the delimiter sequence */
224: memcpy(delim, delim1, delim1len);
225: memcpy(delim + delim1len, delim2, delim2len);
226: delimlen = delim1len + delim2len;
227:
228: /* Do the work. */
229: filter();
230:
231: exit(EXIT_SUCCESS);
232: }
233:
234: void
235: filter(void)
236: {
237: char *buffer;
238: size_t buffersize;
239: ssize_t linelen;
240: int line; /* logical line number */
241: int section; /* logical page section */
242: unsigned int adjblank; /* adjacent blank lines */
243: int donumber = 0, idx;
244:
245: adjblank = 0;
246: line = startnum;
247: section = BODY;
248:
249: buffer = NULL;
250: buffersize = 0;
251: while ((linelen = getline(&buffer, &buffersize, stdin)) > 0) {
252: for (idx = FOOTER; idx <= NP_LAST; idx++) {
253: /* Does it look like a delimiter? */
254: if (delimlen * (idx + 1) > linelen)
255: break;
256: if (memcmp(buffer + delimlen * idx, delim,
257: delimlen) != 0)
258: break;
259: /* Was this the whole line? */
260: if (buffer[delimlen * (idx + 1)] == '\n') {
261: section = idx;
262: adjblank = 0;
263: if (restart)
264: line = startnum;
265: goto nextline;
266: }
267: }
268:
269: switch (numbering_properties[section].type) {
270: case number_all:
271: /*
272: * Doing this for number_all only is disputable, but
273: * the standard expresses an explicit dependency on
274: * `-b a' etc.
275: */
276: if (buffer[0] == '\n' && ++adjblank < nblank)
277: donumber = 0;
278: else
279: donumber = 1, adjblank = 0;
280: break;
281: case number_nonempty:
282: donumber = (buffer[0] != '\n');
283: break;
284: case number_none:
285: donumber = 0;
286: break;
287: case number_regex:
288: donumber =
289: (regexec(&numbering_properties[section].expr,
290: buffer, 0, NULL, 0) == 0);
291: break;
292: }
293:
294: if (donumber) {
295: (void)printf(format, width, line);
296: line += incr;
297: (void)fputs(sep, stdout);
298: } else {
299: (void)printf("%*s", width, "");
300: }
301: (void)fwrite(buffer, linelen, 1, stdout);
302:
303: if (ferror(stdout))
304: err(EXIT_FAILURE, "output error");
305: nextline:
306: ;
307: }
308:
309: if (ferror(stdin))
310: err(EXIT_FAILURE, "input error");
311:
312: free(buffer);
313: }
314:
315: /*
316: * Various support functions.
317: */
318:
319: void
320: parse_numbering(const char *argstr, int section)
321: {
322: int error;
323: char errorbuf[NL_TEXTMAX];
324:
325: switch (argstr[0]) {
326: case 'a':
327: numbering_properties[section].type = number_all;
328: break;
329: case 'n':
330: numbering_properties[section].type = number_none;
331: break;
332: case 't':
333: numbering_properties[section].type = number_nonempty;
334: break;
335: case 'p':
336: /* If there was a previous expression, throw it away. */
337: if (numbering_properties[section].type == number_regex)
338: regfree(&numbering_properties[section].expr);
339: else
340: numbering_properties[section].type = number_regex;
341:
342: /* Compile/validate the supplied regular expression. */
343: if ((error = regcomp(&numbering_properties[section].expr,
344: &argstr[1], REG_NEWLINE|REG_NOSUB)) != 0) {
345: (void)regerror(error,
346: &numbering_properties[section].expr,
347: errorbuf, sizeof(errorbuf));
348: errx(EXIT_FAILURE,
349: "%s expr: %s -- %s",
350: numbering_properties[section].name, errorbuf,
351: &argstr[1]);
352: }
353: break;
354: default:
355: errx(EXIT_FAILURE,
356: "illegal %s line numbering type -- %s",
357: numbering_properties[section].name, argstr);
358: }
359: }
360:
361: __dead void
362: usage(void)
363: {
364: (void)fprintf(stderr, "usage: %s [-p] [-b type] [-d delim] [-f type] "
365: "[-h type] [-i incr] [-l num]\n\t[-n format] [-s sep] "
366: "[-v startnum] [-w width] [file]\n", getprogname());
367: exit(EXIT_FAILURE);
368: }