Annotation of src/usr.bin/mandoc/chars.c, Revision 1.30
1.30 ! schwarze 1: /* $OpenBSD$ */
1.1 schwarze 2: /*
1.19 schwarze 3: * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.30 ! schwarze 4: * Copyright (c) 2011, 2014 Ingo Schwarze <schwarze@openbsd.org>
1.1 schwarze 5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18: #include <assert.h>
1.19 schwarze 19: #include <ctype.h>
1.1 schwarze 20: #include <stdlib.h>
21: #include <string.h>
22:
1.7 schwarze 23: #include "mandoc.h"
1.27 schwarze 24: #include "mandoc_aux.h"
1.19 schwarze 25: #include "libmandoc.h"
1.1 schwarze 26:
27: #define PRINT_HI 126
28: #define PRINT_LO 32
29:
30: struct ln {
31: struct ln *next;
32: const char *code;
33: const char *ascii;
1.9 schwarze 34: int unicode;
1.1 schwarze 35: };
36:
1.26 schwarze 37: #define LINES_MAX 330
1.1 schwarze 38:
1.10 schwarze 39: #define CHAR(in, ch, code) \
1.19 schwarze 40: { NULL, (in), (ch), (code) },
1.1 schwarze 41:
1.4 schwarze 42: #define CHAR_TBL_START static struct ln lines[LINES_MAX] = {
43: #define CHAR_TBL_END };
44:
1.1 schwarze 45: #include "chars.in"
46:
1.19 schwarze 47: struct mchars {
1.1 schwarze 48: struct ln **htab;
49: };
50:
1.28 schwarze 51: static const struct ln *find(const struct mchars *,
1.23 schwarze 52: const char *, size_t);
1.1 schwarze 53:
1.28 schwarze 54:
1.1 schwarze 55: void
1.19 schwarze 56: mchars_free(struct mchars *arg)
1.1 schwarze 57: {
58:
1.19 schwarze 59: free(arg->htab);
60: free(arg);
1.1 schwarze 61: }
62:
1.19 schwarze 63: struct mchars *
64: mchars_alloc(void)
1.1 schwarze 65: {
1.19 schwarze 66: struct mchars *tab;
1.1 schwarze 67: struct ln **htab;
68: struct ln *pp;
69: int i, hash;
70:
71: /*
72: * Constructs a very basic chaining hashtable. The hash routine
73: * is simply the integral value of the first character.
1.21 schwarze 74: * Subsequent entries are chained in the order they're processed.
1.1 schwarze 75: */
76:
1.19 schwarze 77: tab = mandoc_malloc(sizeof(struct mchars));
1.24 schwarze 78: htab = mandoc_calloc(PRINT_HI - PRINT_LO + 1, sizeof(struct ln *));
1.1 schwarze 79:
80: for (i = 0; i < LINES_MAX; i++) {
81: hash = (int)lines[i].code[0] - PRINT_LO;
82:
83: if (NULL == (pp = htab[hash])) {
84: htab[hash] = &lines[i];
85: continue;
86: }
87:
88: for ( ; pp->next; pp = pp->next)
89: /* Scan ahead. */ ;
90: pp->next = &lines[i];
91: }
92:
93: tab->htab = htab;
94: return(tab);
95: }
96:
1.9 schwarze 97: int
1.23 schwarze 98: mchars_spec2cp(const struct mchars *arg, const char *p, size_t sz)
1.9 schwarze 99: {
100: const struct ln *ln;
101:
1.19 schwarze 102: ln = find(arg, p, sz);
1.30 ! schwarze 103: return(ln != NULL ? ln->unicode : sz == 1 ? *p : -1);
1.9 schwarze 104: }
105:
1.19 schwarze 106: char
107: mchars_num2char(const char *p, size_t sz)
1.9 schwarze 108: {
1.28 schwarze 109: int i;
1.9 schwarze 110:
1.22 schwarze 111: if ((i = mandoc_strntoi(p, sz, 10)) < 0)
1.19 schwarze 112: return('\0');
1.28 schwarze 113:
114: return(i > 0 && i < 256 && isprint(i) ? i : '\0');
1.16 schwarze 115: }
116:
1.19 schwarze 117: int
118: mchars_num2uc(const char *p, size_t sz)
1.16 schwarze 119: {
1.28 schwarze 120: int i;
1.16 schwarze 121:
1.22 schwarze 122: if ((i = mandoc_strntoi(p, sz, 16)) < 0)
1.30 ! schwarze 123: return(0xFFFD);
1.29 schwarze 124:
125: /*
126: * XXX Code is missing here to exclude bogus ranges.
127: */
128:
1.30 ! schwarze 129: return(i <= 0x10FFFF ? i : 0xFFFD);
1.9 schwarze 130: }
131:
1.1 schwarze 132: const char *
1.28 schwarze 133: mchars_spec2str(const struct mchars *arg,
1.23 schwarze 134: const char *p, size_t sz, size_t *rsz)
1.1 schwarze 135: {
1.9 schwarze 136: const struct ln *ln;
137:
1.19 schwarze 138: ln = find(arg, p, sz);
1.30 ! schwarze 139: if (ln == NULL) {
1.20 schwarze 140: *rsz = 1;
1.30 ! schwarze 141: return(sz == 1 ? p : NULL);
1.20 schwarze 142: }
1.1 schwarze 143:
1.10 schwarze 144: *rsz = strlen(ln->ascii);
1.9 schwarze 145: return(ln->ascii);
1.1 schwarze 146: }
147:
1.9 schwarze 148: static const struct ln *
1.23 schwarze 149: find(const struct mchars *tab, const char *p, size_t sz)
1.1 schwarze 150: {
1.23 schwarze 151: const struct ln *pp;
1.1 schwarze 152: int hash;
153:
154: assert(p);
155:
1.21 schwarze 156: if (0 == sz || p[0] < PRINT_LO || p[0] > PRINT_HI)
1.1 schwarze 157: return(NULL);
158:
159: hash = (int)p[0] - PRINT_LO;
160:
1.21 schwarze 161: for (pp = tab->htab[hash]; pp; pp = pp->next)
1.28 schwarze 162: if (0 == strncmp(pp->code, p, sz) &&
163: '\0' == pp->code[(int)sz])
1.21 schwarze 164: return(pp);
1.1 schwarze 165:
166: return(NULL);
167: }