From 83d56d6d798a28169f00a4c67323a407037c0b0a Mon Sep 17 00:00:00 2001 From: truelight Date: Sat, 19 Aug 2006 09:31:22 +0000 Subject: (svn r5944) -Merge TGP (r5578, r5579, r5724, r5726): -Feature: filter for textboxes to only allow certain patterns (like numbers only) --- string.c | 30 +++++++++++++++++++++++++++++- 1 file changed, 29 insertions(+), 1 deletion(-) (limited to 'string.c') diff --git a/string.c b/string.c index 3448ce673..d02542699 100644 --- a/string.c +++ b/string.c @@ -62,10 +62,38 @@ char* CDECL str_fmt(const char* str, ...) void str_validate(char *str) { for (; *str != '\0'; str++) - if (!IsValidAsciiChar(*str)) *str = '?'; + if (!IsValidAsciiChar(*str, CS_ALPHANUMERAL)) *str = '?'; } void strtolower(char *str) { for (; *str != '\0'; str++) *str = tolower(*str); } + +/** Only allow valid ascii-function codes. Filter special codes like BELL and + * so on [we need a special filter here later] + * @param key character to be checked + * @return true or false depending if the character is printable/valid or not */ +bool IsValidAsciiChar(byte key, CharSetFilter afilter) +{ + // XXX This filter stops certain crashes, but may be too restrictive. + bool firsttest = false; + + switch (afilter) { + case CS_ALPHANUMERAL: + firsttest = (key >= ' ' && key < 127); + break; + + case CS_NUMERAL://we are quite strict, here + return (key >= 48 && key <= 57); + + case CS_ALPHA: + default: + firsttest = ((key >= 'A' && key <= 'Z') || (key >= 'a' && key <= 'z')); + break; + } + + return (firsttest || (key >= 160 && + key != 0xAA && key != 0xAC && key != 0xAD && key != 0xAF && + key != 0xB5 && key != 0xB6 && key != 0xB7 && key != 0xB9)); +} -- cgit v1.2.3-54-g00ecf