Annotation of mandoc/chars.c, Revision 1.67
1.67 ! schwarze 1: /* $Id: chars.c,v 1.66 2015/02/17 20:37:16 schwarze Exp $ */
1.1 kristaps 2: /*
1.51 schwarze 3: * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.60 schwarze 4: * Copyright (c) 2011, 2014 Ingo Schwarze <schwarze@openbsd.org>
1.1 kristaps 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: */
1.14 kristaps 18: #include "config.h"
1.59 schwarze 19:
20: #include <sys/types.h>
1.14 kristaps 21:
1.1 kristaps 22: #include <assert.h>
1.40 kristaps 23: #include <ctype.h>
1.1 kristaps 24: #include <stdlib.h>
25: #include <string.h>
26:
1.18 kristaps 27: #include "mandoc.h"
1.56 schwarze 28: #include "mandoc_aux.h"
1.43 kristaps 29: #include "libmandoc.h"
1.1 kristaps 30:
1.2 kristaps 31: #define PRINT_HI 126
32: #define PRINT_LO 32
1.1 kristaps 33:
34: struct ln {
35: struct ln *next;
36: const char *code;
1.2 kristaps 37: const char *ascii;
1.21 kristaps 38: int unicode;
1.1 kristaps 39: };
40:
1.66 schwarze 41: #define LINES_MAX 332
1.1 kristaps 42:
1.24 kristaps 43: #define CHAR(in, ch, code) \
1.45 kristaps 44: { NULL, (in), (ch), (code) },
1.1 kristaps 45:
1.13 kristaps 46: #define CHAR_TBL_START static struct ln lines[LINES_MAX] = {
47: #define CHAR_TBL_END };
48:
1.1 kristaps 49: #include "chars.in"
50:
1.36 kristaps 51: struct mchars {
1.1 kristaps 52: struct ln **htab;
53: };
54:
1.57 schwarze 55: static const struct ln *find(const struct mchars *,
1.52 kristaps 56: const char *, size_t);
1.1 kristaps 57:
1.57 schwarze 58:
1.1 kristaps 59: void
1.36 kristaps 60: mchars_free(struct mchars *arg)
1.1 kristaps 61: {
62:
1.36 kristaps 63: free(arg->htab);
64: free(arg);
1.1 kristaps 65: }
66:
1.36 kristaps 67: struct mchars *
1.38 kristaps 68: mchars_alloc(void)
1.1 kristaps 69: {
1.36 kristaps 70: struct mchars *tab;
1.1 kristaps 71: struct ln **htab;
72: struct ln *pp;
73: int i, hash;
74:
75: /*
76: * Constructs a very basic chaining hashtable. The hash routine
77: * is simply the integral value of the first character.
1.47 kristaps 78: * Subsequent entries are chained in the order they're processed.
1.1 kristaps 79: */
80:
1.36 kristaps 81: tab = mandoc_malloc(sizeof(struct mchars));
1.53 schwarze 82: htab = mandoc_calloc(PRINT_HI - PRINT_LO + 1, sizeof(struct ln *));
1.1 kristaps 83:
84: for (i = 0; i < LINES_MAX; i++) {
1.2 kristaps 85: hash = (int)lines[i].code[0] - PRINT_LO;
1.1 kristaps 86:
87: if (NULL == (pp = htab[hash])) {
88: htab[hash] = &lines[i];
89: continue;
90: }
91:
92: for ( ; pp->next; pp = pp->next)
93: /* Scan ahead. */ ;
94: pp->next = &lines[i];
95: }
96:
97: tab->htab = htab;
1.67 ! schwarze 98: return tab;
1.1 kristaps 99: }
100:
1.21 kristaps 101: int
1.52 kristaps 102: mchars_spec2cp(const struct mchars *arg, const char *p, size_t sz)
1.21 kristaps 103: {
104: const struct ln *ln;
105:
1.45 kristaps 106: ln = find(arg, p, sz);
1.67 ! schwarze 107: return ln != NULL ? ln->unicode : sz == 1 ? (unsigned char)*p : -1;
1.21 kristaps 108: }
109:
1.65 schwarze 110: int
1.36 kristaps 111: mchars_num2char(const char *p, size_t sz)
1.32 schwarze 112: {
1.57 schwarze 113: int i;
1.32 schwarze 114:
1.65 schwarze 115: i = mandoc_strntoi(p, sz, 10);
1.67 ! schwarze 116: return i >= 0 && i < 256 ? i : -1;
1.44 kristaps 117: }
118:
119: int
120: mchars_num2uc(const char *p, size_t sz)
121: {
1.57 schwarze 122: int i;
1.39 kristaps 123:
1.63 schwarze 124: i = mandoc_strntoi(p, sz, 16);
125: assert(i >= 0 && i <= 0x10FFFF);
1.67 ! schwarze 126: return i;
1.21 kristaps 127: }
128:
1.1 kristaps 129: const char *
1.57 schwarze 130: mchars_spec2str(const struct mchars *arg,
1.52 kristaps 131: const char *p, size_t sz, size_t *rsz)
1.1 kristaps 132: {
1.21 kristaps 133: const struct ln *ln;
1.1 kristaps 134:
1.45 kristaps 135: ln = find(arg, p, sz);
1.60 schwarze 136: if (ln == NULL) {
1.50 schwarze 137: *rsz = 1;
1.67 ! schwarze 138: return sz == 1 ? p : NULL;
1.50 schwarze 139: }
1.21 kristaps 140:
1.24 kristaps 141: *rsz = strlen(ln->ascii);
1.67 ! schwarze 142: return ln->ascii;
1.61 schwarze 143: }
144:
145: const char *
146: mchars_uc2str(int uc)
147: {
148: int i;
149:
150: for (i = 0; i < LINES_MAX; i++)
151: if (uc == lines[i].unicode)
1.67 ! schwarze 152: return lines[i].ascii;
! 153: return "<?>";
1.1 kristaps 154: }
155:
1.21 kristaps 156: static const struct ln *
1.52 kristaps 157: find(const struct mchars *tab, const char *p, size_t sz)
1.1 kristaps 158: {
1.52 kristaps 159: const struct ln *pp;
1.1 kristaps 160: int hash;
161:
162: assert(p);
163:
1.47 kristaps 164: if (0 == sz || p[0] < PRINT_LO || p[0] > PRINT_HI)
1.67 ! schwarze 165: return NULL;
1.1 kristaps 166:
1.2 kristaps 167: hash = (int)p[0] - PRINT_LO;
1.1 kristaps 168:
1.47 kristaps 169: for (pp = tab->htab[hash]; pp; pp = pp->next)
1.57 schwarze 170: if (0 == strncmp(pp->code, p, sz) &&
171: '\0' == pp->code[(int)sz])
1.67 ! schwarze 172: return pp;
1.1 kristaps 173:
1.67 ! schwarze 174: return NULL;
1.1 kristaps 175: }
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