176 lines
3.5 KiB
C
176 lines
3.5 KiB
C
/* $Id: chars.c,v 1.66 2015/02/17 20:37:16 schwarze Exp $ */
|
|
/*
|
|
* Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
|
|
* Copyright (c) 2011, 2014 Ingo Schwarze <schwarze@openbsd.org>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
#include "config.h"
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <assert.h>
|
|
#include <ctype.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "mandoc.h"
|
|
#include "mandoc_aux.h"
|
|
#include "libmandoc.h"
|
|
|
|
#define PRINT_HI 126
|
|
#define PRINT_LO 32
|
|
|
|
struct ln {
|
|
struct ln *next;
|
|
const char *code;
|
|
const char *ascii;
|
|
int unicode;
|
|
};
|
|
|
|
#define LINES_MAX 332
|
|
|
|
#define CHAR(in, ch, code) \
|
|
{ NULL, (in), (ch), (code) },
|
|
|
|
#define CHAR_TBL_START static struct ln lines[LINES_MAX] = {
|
|
#define CHAR_TBL_END };
|
|
|
|
#include "chars.in"
|
|
|
|
struct mchars {
|
|
struct ln **htab;
|
|
};
|
|
|
|
static const struct ln *find(const struct mchars *,
|
|
const char *, size_t);
|
|
|
|
|
|
void
|
|
mchars_free(struct mchars *arg)
|
|
{
|
|
|
|
free(arg->htab);
|
|
free(arg);
|
|
}
|
|
|
|
struct mchars *
|
|
mchars_alloc(void)
|
|
{
|
|
struct mchars *tab;
|
|
struct ln **htab;
|
|
struct ln *pp;
|
|
int i, hash;
|
|
|
|
/*
|
|
* Constructs a very basic chaining hashtable. The hash routine
|
|
* is simply the integral value of the first character.
|
|
* Subsequent entries are chained in the order they're processed.
|
|
*/
|
|
|
|
tab = mandoc_malloc(sizeof(struct mchars));
|
|
htab = mandoc_calloc(PRINT_HI - PRINT_LO + 1, sizeof(struct ln *));
|
|
|
|
for (i = 0; i < LINES_MAX; i++) {
|
|
hash = (int)lines[i].code[0] - PRINT_LO;
|
|
|
|
if (NULL == (pp = htab[hash])) {
|
|
htab[hash] = &lines[i];
|
|
continue;
|
|
}
|
|
|
|
for ( ; pp->next; pp = pp->next)
|
|
/* Scan ahead. */ ;
|
|
pp->next = &lines[i];
|
|
}
|
|
|
|
tab->htab = htab;
|
|
return(tab);
|
|
}
|
|
|
|
int
|
|
mchars_spec2cp(const struct mchars *arg, const char *p, size_t sz)
|
|
{
|
|
const struct ln *ln;
|
|
|
|
ln = find(arg, p, sz);
|
|
return(ln != NULL ? ln->unicode : sz == 1 ? (unsigned char)*p : -1);
|
|
}
|
|
|
|
int
|
|
mchars_num2char(const char *p, size_t sz)
|
|
{
|
|
int i;
|
|
|
|
i = mandoc_strntoi(p, sz, 10);
|
|
return(i >= 0 && i < 256 ? i : -1);
|
|
}
|
|
|
|
int
|
|
mchars_num2uc(const char *p, size_t sz)
|
|
{
|
|
int i;
|
|
|
|
i = mandoc_strntoi(p, sz, 16);
|
|
assert(i >= 0 && i <= 0x10FFFF);
|
|
return(i);
|
|
}
|
|
|
|
const char *
|
|
mchars_spec2str(const struct mchars *arg,
|
|
const char *p, size_t sz, size_t *rsz)
|
|
{
|
|
const struct ln *ln;
|
|
|
|
ln = find(arg, p, sz);
|
|
if (ln == NULL) {
|
|
*rsz = 1;
|
|
return(sz == 1 ? p : NULL);
|
|
}
|
|
|
|
*rsz = strlen(ln->ascii);
|
|
return(ln->ascii);
|
|
}
|
|
|
|
const char *
|
|
mchars_uc2str(int uc)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < LINES_MAX; i++)
|
|
if (uc == lines[i].unicode)
|
|
return(lines[i].ascii);
|
|
return("<?>");
|
|
}
|
|
|
|
static const struct ln *
|
|
find(const struct mchars *tab, const char *p, size_t sz)
|
|
{
|
|
const struct ln *pp;
|
|
int hash;
|
|
|
|
assert(p);
|
|
|
|
if (0 == sz || p[0] < PRINT_LO || p[0] > PRINT_HI)
|
|
return(NULL);
|
|
|
|
hash = (int)p[0] - PRINT_LO;
|
|
|
|
for (pp = tab->htab[hash]; pp; pp = pp->next)
|
|
if (0 == strncmp(pp->code, p, sz) &&
|
|
'\0' == pp->code[(int)sz])
|
|
return(pp);
|
|
|
|
return(NULL);
|
|
}
|