From 17b514ccd191f8aa57a1464c4223c3a3f5034ad9 Mon Sep 17 00:00:00 2001 From: rubidium Date: Wed, 10 Nov 2010 17:49:14 +0000 Subject: (svn r21133) -Add: function to check the validity of a string (without modifying it) --- src/string.cpp | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'src/string.cpp') diff --git a/src/string.cpp b/src/string.cpp index 54a484b79..bad29649d 100644 --- a/src/string.cpp +++ b/src/string.cpp @@ -162,6 +162,29 @@ void str_validate(char *str, const char *last, bool allow_newlines, bool ignore) *dst = '\0'; } +bool StrValid(const char *str, const char *last) +{ + /* Assume the ABSOLUTE WORST to be in str as it comes from the outside. */ + + while (str <= last && *str != '\0') { + size_t len = Utf8EncodedCharLen(*str); + /* Encoded length is 0 if the character isn't known. + * The length check is needed to prevent Utf8Decode to read + * over the terminating '\0' if that happens to be placed + * within the encoding of an UTF8 character. */ + if (len == 0 || str + len > last) return false; + + WChar c; + len = Utf8Decode(&c, str); + if (!IsPrintable(c) || (c >= SCC_SPRITE_START && c <= SCC_SPRITE_END)) { + return false; + } + + str += len; + } + + return *str == '\0'; +} void str_strip_colours(char *str) { -- cgit v1.2.3-54-g00ecf