Annotation of mandoc/man.c, Revision 1.10
1.10 ! kristaps 1: /* $Id: man.c,v 1.9 2009/03/26 09:55:39 kristaps Exp $ */
1.1 kristaps 2: /*
3: * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@openbsd.org>
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 <assert.h>
20: #include <ctype.h>
1.8 kristaps 21: #include <err.h>
1.1 kristaps 22: #include <stdarg.h>
23: #include <stdlib.h>
24: #include <stdio.h>
25: #include <string.h>
26:
27: #include "libman.h"
28:
29: const char *const __man_macronames[MAN_MAX] = {
30: "\\\"", "TH", "SH", "SS",
31: "TP", "LP", "PP", "P",
32: "IP", "HP", "SM", "SB",
33: "BI", "IB", "BR", "RB",
1.2 kristaps 34: "R", "B", "I", "IR"
1.1 kristaps 35: };
36:
37: const char * const *man_macronames = __man_macronames;
38:
39: static struct man_node *man_node_alloc(int, int, enum man_type);
40: static int man_node_append(struct man *,
41: struct man_node *);
42: static int man_ptext(struct man *, int, char *);
43: static int man_pmacro(struct man *, int, char *);
1.2 kristaps 44: static void man_free1(struct man *);
45: static void man_alloc1(struct man *);
1.1 kristaps 46:
47:
48: const struct man_node *
1.2 kristaps 49: man_node(const struct man *m)
1.1 kristaps 50: {
51:
1.2 kristaps 52: return(MAN_HALT & m->flags ? NULL : m->first);
1.1 kristaps 53: }
54:
55:
56: const struct man_meta *
1.2 kristaps 57: man_meta(const struct man *m)
1.1 kristaps 58: {
59:
1.2 kristaps 60: return(MAN_HALT & m->flags ? NULL : &m->meta);
1.1 kristaps 61: }
62:
63:
64: void
65: man_reset(struct man *man)
66: {
67:
1.2 kristaps 68: man_free1(man);
69: man_alloc1(man);
1.1 kristaps 70: }
71:
72:
73: void
74: man_free(struct man *man)
75: {
76:
1.2 kristaps 77: man_free1(man);
78:
1.1 kristaps 79: if (man->htab)
80: man_hash_free(man->htab);
81: free(man);
82: }
83:
84:
85: struct man *
1.7 kristaps 86: man_alloc(void *data, int pflags, const struct man_cb *cb)
1.1 kristaps 87: {
88: struct man *p;
89:
1.2 kristaps 90: p = calloc(1, sizeof(struct man));
91: if (NULL == p)
92: err(1, "calloc");
93:
94: man_alloc1(p);
1.1 kristaps 95:
1.4 kristaps 96: if (cb)
97: (void)memcpy(&p->cb, cb, sizeof(struct man_cb));
98:
1.1 kristaps 99: p->htab = man_hash_alloc();
1.4 kristaps 100: p->data = data;
1.7 kristaps 101: p->pflags = pflags;
102:
1.1 kristaps 103: return(p);
104: }
105:
106:
107: int
108: man_endparse(struct man *m)
109: {
110:
1.3 kristaps 111: if (MAN_HALT & m->flags)
112: return(0);
113: else if (man_macroend(m))
114: return(1);
115: m->flags |= MAN_HALT;
116: return(0);
1.1 kristaps 117: }
118:
119:
120: int
121: man_parseln(struct man *m, int ln, char *buf)
122: {
123:
124: return('.' == *buf ?
125: man_pmacro(m, ln, buf) :
126: man_ptext(m, ln, buf));
127: }
128:
129:
1.2 kristaps 130: static void
131: man_free1(struct man *man)
132: {
133:
134: if (man->first)
135: man_node_freelist(man->first);
136: if (man->meta.title)
137: free(man->meta.title);
1.6 kristaps 138: if (man->meta.source)
139: free(man->meta.source);
1.2 kristaps 140: if (man->meta.vol)
141: free(man->meta.vol);
142: }
143:
144:
145: static void
146: man_alloc1(struct man *m)
147: {
148:
149: bzero(&m->meta, sizeof(struct man_meta));
150: m->flags = 0;
151: m->last = calloc(1, sizeof(struct man_node));
152: if (NULL == m->last)
153: err(1, "calloc");
154: m->first = m->last;
155: m->last->type = MAN_ROOT;
156: m->next = MAN_NEXT_CHILD;
157: }
158:
159:
1.1 kristaps 160: static int
161: man_node_append(struct man *man, struct man_node *p)
162: {
163:
164: assert(man->last);
165: assert(man->first);
166: assert(MAN_ROOT != p->type);
167:
168: switch (man->next) {
169: case (MAN_NEXT_SIBLING):
170: man->last->next = p;
171: p->prev = man->last;
172: p->parent = man->last->parent;
173: break;
174: case (MAN_NEXT_CHILD):
175: man->last->child = p;
176: p->parent = man->last;
177: break;
178: default:
179: abort();
180: /* NOTREACHED */
181: }
182:
1.2 kristaps 183: man->last = p;
184:
1.1 kristaps 185: switch (p->type) {
1.2 kristaps 186: case (MAN_TEXT):
187: if ( ! man_valid_post(man))
188: return(0);
189: if ( ! man_action_post(man))
190: return(0);
1.1 kristaps 191: break;
192: default:
193: break;
194: }
195:
196: return(1);
197: }
198:
199:
200: static struct man_node *
201: man_node_alloc(int line, int pos, enum man_type type)
202: {
203: struct man_node *p;
204:
205: if (NULL == (p = calloc(1, sizeof(struct man_node))))
206: err(1, "malloc");
207: p->line = line;
208: p->pos = pos;
209: p->type = type;
210:
211: return(p);
212: }
213:
214:
215: int
216: man_elem_alloc(struct man *man, int line, int pos, int tok)
217: {
218: struct man_node *p;
219:
220: p = man_node_alloc(line, pos, MAN_ELEM);
221: p->tok = tok;
222:
223: return(man_node_append(man, p));
224: }
225:
226:
227: int
228: man_word_alloc(struct man *man,
229: int line, int pos, const char *word)
230: {
231: struct man_node *p;
232:
233: p = man_node_alloc(line, pos, MAN_TEXT);
234: if (NULL == (p->string = strdup(word)))
235: err(1, "strdup");
236:
237: return(man_node_append(man, p));
238: }
239:
240:
241: void
242: man_node_free(struct man_node *p)
243: {
244:
245: if (p->string)
246: free(p->string);
247: free(p);
248: }
249:
250:
251: void
252: man_node_freelist(struct man_node *p)
253: {
254:
255: if (p->child)
256: man_node_freelist(p->child);
257: if (p->next)
258: man_node_freelist(p->next);
259:
260: man_node_free(p);
261: }
262:
263:
264: static int
265: man_ptext(struct man *m, int line, char *buf)
266: {
267:
268: if ( ! man_word_alloc(m, line, 0, buf))
269: return(0);
270: m->next = MAN_NEXT_SIBLING;
271: return(1);
272: }
273:
274:
275: int
276: man_pmacro(struct man *m, int ln, char *buf)
277: {
1.10 ! kristaps 278: int i, j, c, ppos;
1.1 kristaps 279: char mac[5];
280:
281: /* Comments and empties are quickly ignored. */
282:
283: if (0 == buf[1])
284: return(1);
285:
1.9 kristaps 286: i = 1;
287:
288: if (' ' == buf[i]) {
289: i++;
1.1 kristaps 290: while (buf[i] && ' ' == buf[i])
291: i++;
292: if (0 == buf[i])
293: return(1);
294: }
295:
1.10 ! kristaps 296: ppos = i;
! 297:
1.9 kristaps 298: if (buf[i] && '\\' == buf[i])
299: if (buf[i + 1] && '\"' == buf[i + 1])
1.1 kristaps 300: return(1);
301:
302: /* Copy the first word into a nil-terminated buffer. */
303:
1.10 ! kristaps 304: for (j = 0; j < 4; j++, i++) {
! 305: if (0 == (mac[j] = buf[i]))
1.1 kristaps 306: break;
1.10 ! kristaps 307: else if (' ' == buf[i])
1.1 kristaps 308: break;
309: }
310:
1.9 kristaps 311: mac[j] = 0;
1.1 kristaps 312:
1.9 kristaps 313: if (j == 4 || j < 1) {
1.7 kristaps 314: if ( ! (MAN_IGN_MACRO & m->pflags)) {
1.10 ! kristaps 315: (void)man_verr(m, ln, ppos,
1.7 kristaps 316: "ill-formed macro: %s", mac);
317: goto err;
318: }
1.10 ! kristaps 319: if ( ! man_vwarn(m, ln, ppos,
! 320: "ill-formed macro: %s", mac))
1.7 kristaps 321: goto err;
322: return(1);
323: }
1.1 kristaps 324:
325: if (MAN_MAX == (c = man_hash_find(m->htab, mac))) {
1.7 kristaps 326: if ( ! (MAN_IGN_MACRO & m->pflags)) {
1.10 ! kristaps 327: (void)man_verr(m, ln, ppos,
1.7 kristaps 328: "unknown macro: %s", mac);
329: goto err;
330: }
1.10 ! kristaps 331: if ( ! man_vwarn(m, ln, ppos,
! 332: "unknown macro: %s", mac))
1.7 kristaps 333: goto err;
334: return(1);
1.1 kristaps 335: }
336:
337: /* The macro is sane. Jump to the next word. */
338:
339: while (buf[i] && ' ' == buf[i])
340: i++;
341:
342: /* Begin recursive parse sequence. */
343:
1.10 ! kristaps 344: if ( ! man_macro(m, c, ln, ppos, &i, buf))
1.1 kristaps 345: goto err;
346:
347: return(1);
348:
349: err: /* Error out. */
350:
1.2 kristaps 351: m->flags |= MAN_HALT;
1.1 kristaps 352: return(0);
353: }
1.3 kristaps 354:
1.4 kristaps 355:
356: int
357: man_verr(struct man *man, int ln, int pos, const char *fmt, ...)
358: {
359: char buf[256];
360: va_list ap;
361:
362: if (NULL == man->cb.man_err)
363: return(0);
364:
365: va_start(ap, fmt);
366: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
367: va_end(ap);
368: return((*man->cb.man_err)(man->data, ln, pos, buf));
369: }
370:
371:
372: int
373: man_vwarn(struct man *man, int ln, int pos, const char *fmt, ...)
374: {
375: char buf[256];
376: va_list ap;
377:
378: if (NULL == man->cb.man_warn)
379: return(0);
380:
381: va_start(ap, fmt);
382: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
383: va_end(ap);
384: return((*man->cb.man_warn)(man->data, ln, pos, buf));
385: }
386:
387:
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