mdocml: Make mchars_num2char() return a char like it says.

mdocml: Make mchars_num2char() return a char like it says.

[kristaps]

Log Message:
-----------
Make mchars_num2char() return a char like it says.

Modified Files:
--------------
    mdocml:
        chars.c
        html.c
        mandoc.h
        term.c

Revision Data
-------------
Index: term.c
===================================================================
RCS file: /usr/vhosts/mdocml.bsd.lv/cvs/mdocml/term.c,v
retrieving revision 1.185
retrieving revision 1.186
diff -Lterm.c -Lterm.c -u -p -r1.185 -r1.186
--- term.c
+++ term.c
@@ -348,11 +348,10 @@ term_vspace(struct termp *p)
 static void
 numbered(struct termp *p, const char *word, size_t len)
 {
-	const char	*rhs;
+	char		 c;
 
-	rhs = mchars_num2char(word, len);
-	if (rhs) 
-		encode(p, rhs, 1);
+	if ('\0' != (c = mchars_num2char(word, len)))
+		encode(p, &c, 1);
 }
 
 
Index: chars.c
===================================================================
RCS file: /usr/vhosts/mdocml.bsd.lv/cvs/mdocml/chars.c,v
retrieving revision 1.38
retrieving revision 1.39
diff -Lchars.c -Lchars.c -u -p -r1.38 -r1.39
--- chars.c
+++ chars.c
@@ -137,23 +137,23 @@ mchars_res2cp(struct mchars *arg, const 
 
 
 /*
- * Numbered character to literal character,
- * represented as a null-terminated string for additional safety.
+ * Numbered character to literal character.
  */
-const char *
+char
 mchars_num2char(const char *p, size_t sz)
 {
 	int		  i;
-	static char	  c[2];
 
 	if (sz > 3)
-		return(NULL);
+		return('\0');
+
 	i = atoi(p);
-	if (i < 0 || i > 255)
-		return(NULL);
-	c[0] = (char)i;
-	c[1] = '\0';
-	return(c);
+	/* 
+	 * 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);
 }
 
 
Index: html.c
===================================================================
RCS file: /usr/vhosts/mdocml.bsd.lv/cvs/mdocml/html.c,v
retrieving revision 1.136
retrieving revision 1.137
diff -Lhtml.c -Lhtml.c -u -p -r1.136 -r1.137
--- html.c
+++ html.c
@@ -212,11 +212,10 @@ print_gen_head(struct html *h)
 static void
 print_num(struct html *h, const char *p, size_t len)
 {
-	const char	*rhs;
+	char		 c;
 
-	rhs = mchars_num2char(p, len);
-	if (rhs)
-		putchar((int)*rhs);
+	if ('\0' != (c = mchars_num2char(p, len)))
+		putchar((int)c);
 }
 
 static void
Index: mandoc.h
===================================================================
RCS file: /usr/vhosts/mdocml.bsd.lv/cvs/mdocml/mandoc.h,v
retrieving revision 1.73
retrieving revision 1.74
diff -Lmandoc.h -Lmandoc.h -u -p -r1.73 -r1.74
--- mandoc.h
+++ mandoc.h
@@ -328,7 +328,7 @@ void		 *mandoc_realloc(void *, size_t);
 enum mandoc_esc	  mandoc_escape(const char **, const char **, int *);
 
 struct mchars	 *mchars_alloc(void);
-const char	 *mchars_num2char(const char *, size_t);
+char	 	  mchars_num2char(const char *, size_t);
 const char	 *mchars_spec2str(struct mchars *, const char *, size_t, size_t *);
 int		  mchars_spec2cp(struct mchars *, const char *, size_t);
 const char	 *mchars_res2str(struct mchars *, const char *, size_t, size_t *);
--
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