Annotation of src/usr.bin/mandoc/chars.c, Revision 1.22
1.22 ! schwarze 1: /* $Id: chars.c,v 1.21 2011/07/08 16:59:50 schwarze Exp $ */
1.1 schwarze 2: /*
1.19 schwarze 3: * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.16 schwarze 4: * Copyright (c) 2011 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"
1.19 schwarze 24: #include "libmandoc.h"
1.1 schwarze 25:
26: #define PRINT_HI 126
27: #define PRINT_LO 32
28:
29: struct ln {
30: struct ln *next;
31: const char *code;
32: const char *ascii;
1.9 schwarze 33: int unicode;
1.1 schwarze 34: };
35:
1.22 ! schwarze 36: #define LINES_MAX 328
1.1 schwarze 37:
1.10 schwarze 38: #define CHAR(in, ch, code) \
1.19 schwarze 39: { NULL, (in), (ch), (code) },
1.1 schwarze 40:
1.4 schwarze 41: #define CHAR_TBL_START static struct ln lines[LINES_MAX] = {
42: #define CHAR_TBL_END };
43:
1.1 schwarze 44: #include "chars.in"
45:
1.19 schwarze 46: struct mchars {
1.1 schwarze 47: struct ln **htab;
48: };
49:
1.19 schwarze 50: static const struct ln *find(struct mchars *, const char *, size_t);
1.1 schwarze 51:
52: void
1.19 schwarze 53: mchars_free(struct mchars *arg)
1.1 schwarze 54: {
55:
1.19 schwarze 56: free(arg->htab);
57: free(arg);
1.1 schwarze 58: }
59:
1.19 schwarze 60: struct mchars *
61: mchars_alloc(void)
1.1 schwarze 62: {
1.19 schwarze 63: struct mchars *tab;
1.1 schwarze 64: struct ln **htab;
65: struct ln *pp;
66: int i, hash;
67:
68: /*
69: * Constructs a very basic chaining hashtable. The hash routine
70: * is simply the integral value of the first character.
1.21 schwarze 71: * Subsequent entries are chained in the order they're processed.
1.1 schwarze 72: */
73:
1.19 schwarze 74: tab = mandoc_malloc(sizeof(struct mchars));
1.17 schwarze 75: htab = mandoc_calloc(PRINT_HI - PRINT_LO + 1, sizeof(struct ln **));
1.1 schwarze 76:
77: for (i = 0; i < LINES_MAX; i++) {
78: hash = (int)lines[i].code[0] - PRINT_LO;
79:
80: if (NULL == (pp = htab[hash])) {
81: htab[hash] = &lines[i];
82: continue;
83: }
84:
85: for ( ; pp->next; pp = pp->next)
86: /* Scan ahead. */ ;
87: pp->next = &lines[i];
88: }
89:
90: tab->htab = htab;
91: return(tab);
92: }
93:
1.9 schwarze 94: int
1.19 schwarze 95: mchars_spec2cp(struct mchars *arg, const char *p, size_t sz)
1.9 schwarze 96: {
97: const struct ln *ln;
98:
1.19 schwarze 99: ln = find(arg, p, sz);
1.9 schwarze 100: if (NULL == ln)
101: return(-1);
102: return(ln->unicode);
103: }
104:
1.19 schwarze 105: char
106: mchars_num2char(const char *p, size_t sz)
1.9 schwarze 107: {
1.19 schwarze 108: int i;
1.9 schwarze 109:
1.22 ! schwarze 110: if ((i = mandoc_strntoi(p, sz, 10)) < 0)
1.19 schwarze 111: return('\0');
1.20 schwarze 112: return(i > 0 && i < 256 && isprint(i) ? i : '\0');
1.16 schwarze 113: }
114:
1.19 schwarze 115: int
116: mchars_num2uc(const char *p, size_t sz)
1.16 schwarze 117: {
1.19 schwarze 118: int i;
1.16 schwarze 119:
1.22 ! schwarze 120: if ((i = mandoc_strntoi(p, sz, 16)) < 0)
1.19 schwarze 121: return('\0');
122: /* FIXME: make sure we're not in a bogus range. */
123: return(i > 0x80 && i <= 0x10FFFF ? i : '\0');
1.9 schwarze 124: }
125:
1.1 schwarze 126: const char *
1.19 schwarze 127: mchars_spec2str(struct mchars *arg, const char *p, size_t sz, size_t *rsz)
1.1 schwarze 128: {
1.9 schwarze 129: const struct ln *ln;
130:
1.19 schwarze 131: ln = find(arg, p, sz);
1.20 schwarze 132: if (NULL == ln) {
133: *rsz = 1;
1.9 schwarze 134: return(NULL);
1.20 schwarze 135: }
1.1 schwarze 136:
1.10 schwarze 137: *rsz = strlen(ln->ascii);
1.9 schwarze 138: return(ln->ascii);
1.1 schwarze 139: }
140:
1.9 schwarze 141: static const struct ln *
1.19 schwarze 142: find(struct mchars *tab, const char *p, size_t sz)
1.1 schwarze 143: {
1.21 schwarze 144: struct ln *pp;
1.1 schwarze 145: int hash;
146:
147: assert(p);
148:
1.21 schwarze 149: if (0 == sz || p[0] < PRINT_LO || p[0] > PRINT_HI)
1.1 schwarze 150: return(NULL);
151:
152: hash = (int)p[0] - PRINT_LO;
153:
1.21 schwarze 154: for (pp = tab->htab[hash]; pp; pp = pp->next)
155: if (0 == strncmp(pp->code, p, sz) &&
156: '\0' == pp->code[(int)sz])
157: return(pp);
1.1 schwarze 158:
159: return(NULL);
160: }
![[BACK]](/icons/back.gif){kind=icon}
Return to chars.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / mandoc