Annotation of mandoc/mdocml.c, Revision 1.13
1.13 ! kristaps 1: /* $Id: mdocml.c,v 1.12 2008/11/26 22:27:07 kristaps Exp $ */
1.1 kristaps 2: /*
3: * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the
7: * above copyright notice and this permission notice appear in all
8: * copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
11: * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
12: * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
13: * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
14: * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
15: * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
16: * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
17: * PERFORMANCE OF THIS SOFTWARE.
18: */
19: #include <sys/param.h>
20: #include <sys/stat.h>
21:
22: #include <assert.h>
23: #include <err.h>
24: #include <fcntl.h>
25: #include <getopt.h>
26: #include <stdio.h>
27: #include <stdlib.h>
28: #include <string.h>
29: #include <unistd.h>
30:
31: #include "libmdocml.h"
32:
1.9 kristaps 33: #define BUFFER_IN_DEF BUFSIZ /* See begin_bufs. */
34: #define BUFFER_OUT_DEF BUFSIZ /* See begin_bufs. */
1.2 kristaps 35:
1.9 kristaps 36: static void usage(void);
37:
38: static int begin_io(const struct md_args *,
1.5 kristaps 39: char *, char *);
1.9 kristaps 40: static int leave_io(const struct md_buf *,
1.5 kristaps 41: const struct md_buf *, int);
1.9 kristaps 42: static int begin_bufs(const struct md_args *,
1.5 kristaps 43: struct md_buf *, struct md_buf *);
44: static int leave_bufs(const struct md_buf *,
45: const struct md_buf *, int);
1.1 kristaps 46:
47: int
48: main(int argc, char *argv[])
49: {
50: int c;
51: char *out, *in;
1.5 kristaps 52: struct md_args args;
1.1 kristaps 53:
54: extern char *optarg;
55: extern int optind;
56:
1.4 kristaps 57: out = in = NULL;
1.10 kristaps 58:
59: (void)memset(&args, 0, sizeof(struct md_args));
1.1 kristaps 60:
1.13 ! kristaps 61: while (-1 != (c = getopt(argc, argv, "o:vW")))
1.1 kristaps 62: switch (c) {
63: case ('o'):
64: out = optarg;
65: break;
1.13 ! kristaps 66: case ('v'):
! 67: args.verbosity++;
! 68: break;
! 69: case ('W'):
! 70: args.warnings |= MD_WARN_ALL;
! 71: break;
1.1 kristaps 72: default:
73: usage();
74: return(1);
75: }
76:
77: argv += optind;
1.4 kristaps 78: argc -= optind;
1.1 kristaps 79:
1.4 kristaps 80: if (1 == argc)
81: in = *argv++;
1.1 kristaps 82:
1.10 kristaps 83: args.type = MD_DUMMY;
1.5 kristaps 84:
85: return(begin_io(&args, out ? out : "-", in ? in : "-"));
1.1 kristaps 86: }
87:
88:
1.9 kristaps 89: /*
90: * Close out file descriptors opened in begin_io. If the descriptor
91: * refers to stdin/stdout, then do nothing.
92: */
1.1 kristaps 93: static int
1.5 kristaps 94: leave_io(const struct md_buf *out,
95: const struct md_buf *in, int c)
1.1 kristaps 96: {
1.4 kristaps 97: assert(out);
1.1 kristaps 98: assert(in);
99:
1.4 kristaps 100: if (-1 != in->fd && -1 == close(in->fd)) {
101: assert(in->name);
102: warn("%s", in->name);
103: c = 1;
104: }
105: if (-1 != out->fd && STDOUT_FILENO != out->fd &&
106: -1 == close(out->fd)) {
107: assert(out->name);
108: warn("%s", out->name);
109: c = 1;
110: }
1.1 kristaps 111:
1.4 kristaps 112: return(c);
1.1 kristaps 113: }
114:
115:
1.9 kristaps 116: /*
117: * Open file descriptors or assign stdin/stdout, if dictated by the "-"
118: * token instead of a filename.
119: */
1.1 kristaps 120: static int
1.5 kristaps 121: begin_io(const struct md_args *args, char *out, char *in)
1.1 kristaps 122: {
1.5 kristaps 123: struct md_buf fi;
124: struct md_buf fo;
1.4 kristaps 125:
126: #define FI_FL O_RDONLY
127: #define FO_FL O_WRONLY|O_CREAT|O_TRUNC
1.1 kristaps 128:
1.5 kristaps 129: assert(args);
1.1 kristaps 130: assert(out);
131: assert(in);
132:
1.5 kristaps 133: bzero(&fi, sizeof(struct md_buf));
134: bzero(&fo, sizeof(struct md_buf));
1.1 kristaps 135:
1.4 kristaps 136: fi.fd = STDIN_FILENO;
137: fo.fd = STDOUT_FILENO;
1.1 kristaps 138:
1.4 kristaps 139: fi.name = in;
140: fo.name = out;
1.1 kristaps 141:
1.4 kristaps 142: if (0 != strncmp(fi.name, "-", 1))
143: if (-1 == (fi.fd = open(fi.name, FI_FL, 0))) {
144: warn("%s", fi.name);
145: return(leave_io(&fo, &fi, 1));
146: }
1.1 kristaps 147:
1.4 kristaps 148: if (0 != strncmp(fo.name, "-", 1))
149: if (-1 == (fo.fd = open(fo.name, FO_FL, 0644))) {
150: warn("%s", fo.name);
151: return(leave_io(&fo, &fi, 1));
152: }
1.1 kristaps 153:
1.5 kristaps 154: return(leave_io(&fo, &fi, begin_bufs(args, &fo, &fi)));
1.4 kristaps 155: }
1.1 kristaps 156:
157:
1.9 kristaps 158: /*
159: * Free buffers allocated in begin_bufs.
160: */
1.4 kristaps 161: static int
1.5 kristaps 162: leave_bufs(const struct md_buf *out,
163: const struct md_buf *in, int c)
1.4 kristaps 164: {
165: assert(out);
166: assert(in);
167: if (out->buf)
168: free(out->buf);
169: if (in->buf)
170: free(in->buf);
1.1 kristaps 171: return(c);
172: }
173:
174:
1.9 kristaps 175: /*
176: * Allocate buffers to the maximum of either the input file's blocksize
177: * or BUFFER_IN_DEF/BUFFER_OUT_DEF, which should be around BUFSIZE.
178: */
1.1 kristaps 179: static int
1.5 kristaps 180: begin_bufs(const struct md_args *args,
181: struct md_buf *out, struct md_buf *in)
1.1 kristaps 182: {
183: struct stat stin, stout;
1.5 kristaps 184: int c;
1.1 kristaps 185:
1.5 kristaps 186: assert(args);
1.1 kristaps 187: assert(in);
188: assert(out);
189:
190: if (-1 == fstat(in->fd, &stin)) {
1.3 kristaps 191: warn("%s", in->name);
1.1 kristaps 192: return(1);
1.12 kristaps 193: } else if (STDIN_FILENO != in->fd && 0 == stin.st_size) {
1.8 kristaps 194: warnx("%s: empty file", in->name);
195: return(1);
1.1 kristaps 196: } else if (-1 == fstat(out->fd, &stout)) {
1.3 kristaps 197: warn("%s", out->name);
1.1 kristaps 198: return(1);
199: }
200:
1.3 kristaps 201: in->bufsz = MAX(stin.st_blksize, BUFFER_IN_DEF);
202: out->bufsz = MAX(stout.st_blksize, BUFFER_OUT_DEF);
1.1 kristaps 203:
1.3 kristaps 204: if (NULL == (in->buf = malloc(in->bufsz))) {
1.1 kristaps 205: warn("malloc");
1.4 kristaps 206: return(leave_bufs(out, in, 1));
1.3 kristaps 207: } else if (NULL == (out->buf = malloc(out->bufsz))) {
1.1 kristaps 208: warn("malloc");
1.4 kristaps 209: return(leave_bufs(out, in, 1));
1.1 kristaps 210: }
211:
1.5 kristaps 212: c = md_run(args, out, in);
213: return(leave_bufs(out, in, -1 == c ? 1 : 0));
1.1 kristaps 214: }
215:
216:
217: static void
218: usage(void)
219: {
220: extern char *__progname;
221:
1.13 ! kristaps 222: (void)printf("usage: %s [-vW] [-o outfile] [infile]\n", __progname);
1.1 kristaps 223: }
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