diff options
Diffstat (limited to 'mandoc.c')
| -rw-r--r-- | mandoc.c | 36 |
1 files changed, 35 insertions, 1 deletions
@@ -1,4 +1,4 @@ -/* $Id: mandoc.c,v 1.49 2011/04/30 10:18:24 kristaps Exp $ */ +/* $Id: mandoc.c,v 1.50 2011/05/14 16:06:09 kristaps Exp $ */ /* * Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv> * Copyright (c) 2011 Ingo Schwarze <schwarze@openbsd.org> @@ -23,6 +23,8 @@ #include <assert.h> #include <ctype.h> +#include <errno.h> +#include <limits.h> #include <stdlib.h> #include <stdio.h> #include <string.h> @@ -686,3 +688,35 @@ mandoc_getcontrol(const char *cp, int *ppos) *ppos = pos; return(1); } + +/* + * Convert a string to a long that may not be <0. + * If the string is invalid, or is less than 0, return -1. + */ +int +mandoc_strntou(const char *p, size_t sz, int base) +{ + char buf[32]; + char *ep; + long v; + + if (sz > 31) + return(-1); + + memcpy(buf, p, sz); + buf[sz] = '\0'; + + errno = 0; + v = strtol(buf, &ep, base); + + if (buf[0] == '\0' || *ep != '\0') + return(-1); + + if ((errno == ERANGE && + (v == LONG_MAX || v == LONG_MIN)) || + (v > INT_MAX || v < 0)) + return(-1); + + return((int)v); +} + |