-/* $Id: chars.c,v 1.39 2011/04/30 22:24:31 kristaps Exp $ */
+/* $Id: chars.c,v 1.58 2014/07/23 15:00:08 schwarze Exp $ */
/*
- * Copyright (c) 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2011 Ingo Schwarze <schwarze@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
#endif
#include <assert.h>
-#include <stdio.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
const char *code;
const char *ascii;
int unicode;
- int type;
-#define CHARS_CHAR (1 << 0)
-#define CHARS_STRING (1 << 1)
-#define CHARS_BOTH (CHARS_CHAR | CHARS_STRING)
};
-#define LINES_MAX 353
+#define LINES_MAX 330
#define CHAR(in, ch, code) \
- { NULL, (in), (ch), (code), CHARS_CHAR },
-#define STRING(in, ch, code) \
- { NULL, (in), (ch), (code), CHARS_STRING },
-#define BOTH(in, ch, code) \
- { NULL, (in), (ch), (code), CHARS_BOTH },
+ { NULL, (in), (ch), (code) },
#define CHAR_TBL_START static struct ln lines[LINES_MAX] = {
#define CHAR_TBL_END };
struct ln **htab;
};
-static inline int match(const struct ln *,
- const char *, size_t, int);
-static const struct ln *find(struct mchars *, const char *, size_t, int);
+static const struct ln *find(const struct mchars *,
+ const char *, size_t);
+
void
mchars_free(struct mchars *arg)
/*
* 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
- * (they're in-line re-ordered during lookup).
+ * 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 **));
+ 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;
return(tab);
}
-
-/*
- * Special character to Unicode codepoint.
- */
-int
-mchars_spec2cp(struct mchars *arg, const char *p, size_t sz)
-{
- const struct ln *ln;
-
- ln = find(arg, p, sz, CHARS_CHAR);
- if (NULL == ln)
- return(-1);
- return(ln->unicode);
-}
-
-
-/*
- * Reserved word to Unicode codepoint.
- */
int
-mchars_res2cp(struct mchars *arg, const char *p, size_t sz)
+mchars_spec2cp(const struct mchars *arg, const char *p, size_t sz)
{
const struct ln *ln;
- ln = find(arg, p, sz, CHARS_STRING);
+ ln = find(arg, p, sz);
if (NULL == ln)
return(-1);
return(ln->unicode);
}
-
-/*
- * Numbered character to literal character.
- */
char
mchars_num2char(const char *p, size_t sz)
{
- int i;
+ int i;
- if (sz > 3)
+ if ((i = mandoc_strntoi(p, sz, 10)) < 0)
return('\0');
- i = atoi(p);
- /*
- * FIXME:
- * This is wrong. Anything could be written here!
- * This should be carefully screened for possible characters.
- */
- return(i <= 0 || i > 255 ? '\0' : (char)i);
+ return(i > 0 && i < 256 && isprint(i) ? i : '\0');
}
-
-/*
- * Special character to string array.
- */
-const char *
-mchars_spec2str(struct mchars *arg, const char *p, size_t sz, size_t *rsz)
+int
+mchars_num2uc(const char *p, size_t sz)
{
- const struct ln *ln;
+ int i;
- ln = find(arg, p, sz, CHARS_CHAR);
- if (NULL == ln)
- return(NULL);
+ if ((i = mandoc_strntoi(p, sz, 16)) < 0)
+ return('\0');
- *rsz = strlen(ln->ascii);
- return(ln->ascii);
-}
+ /*
+ * Security warning:
+ * Never extend the range of accepted characters
+ * to overlap with the ASCII range, 0x00-0x7F
+ * without re-auditing the callers of this function.
+ * Some callers might relay on the fact that we never
+ * return ASCII characters for their escaping decisions.
+ *
+ * XXX Code is missing here to exclude bogus ranges.
+ */
+ return(i > 0x80 && i <= 0x10FFFF ? i : '\0');
+}
-/*
- * Reserved word to string array.
- */
const char *
-mchars_res2str(struct mchars *arg, const char *p, size_t sz, size_t *rsz)
+mchars_spec2str(const struct mchars *arg,
+ const char *p, size_t sz, size_t *rsz)
{
const struct ln *ln;
- ln = find(arg, p, sz, CHARS_STRING);
- if (NULL == ln)
+ ln = find(arg, p, sz);
+ if (NULL == ln) {
+ *rsz = 1;
return(NULL);
+ }
*rsz = strlen(ln->ascii);
return(ln->ascii);
}
static const struct ln *
-find(struct mchars *tab, const char *p, size_t sz, int type)
+find(const struct mchars *tab, const char *p, size_t sz)
{
- struct ln *pp, *prev;
- struct ln **htab;
+ const struct ln *pp;
int hash;
assert(p);
- if (0 == sz)
- return(NULL);
- if (p[0] < PRINT_LO || p[0] > PRINT_HI)
+ if (0 == sz || p[0] < PRINT_LO || p[0] > PRINT_HI)
return(NULL);
- /*
- * Lookup the symbol in the symbol hash. See ascii2htab for the
- * hashtable specs. This dynamically re-orders the hash chain
- * to optimise for repeat hits.
- */
-
hash = (int)p[0] - PRINT_LO;
- htab = tab->htab;
-
- if (NULL == (pp = htab[hash]))
- return(NULL);
- for (prev = NULL; pp; pp = pp->next) {
- if ( ! match(pp, p, sz, type)) {
- prev = pp;
- continue;
- }
-
- if (prev) {
- prev->next = pp->next;
- pp->next = htab[hash];
- htab[hash] = pp;
- }
-
- return(pp);
- }
+ 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);
}
-
-static inline int
-match(const struct ln *ln, const char *p, size_t sz, int type)
-{
-
- if ( ! (ln->type & type))
- return(0);
- if (strncmp(ln->code, p, sz))
- return(0);
- return('\0' == ln->code[(int)sz]);
-}
git.ckatri.com / mandoc.git / blobdiff