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/*******************************************************************************
* librepfunc - a collection of common functions, classes and tools.
* See the README file for copyright information and how to reach the author.
******************************************************************************/
#include <repfunc.h>
bool Matches(std::string String, std::string Pattern) {
if (Pattern == "*") return true;
const char* string = String.c_str();
const char* pattern = Pattern.c_str();
bool result = true;
while(true) {
switch(pattern[0]) {
case 0:
/* end of Pattern */
return (string[0] == 0);
case '*': {
if (pattern[1] == 0) {
/* pattern ends with a '*' and matches everything now,
* stop searching. */
return true;
}
else
pattern++;
while(*string) {
if (Matches(string,pattern)) return true;
string++;
}
}
break;
case '?': {
if (string[0] == 0) {
/* Pattern requested a single arbitrary char here,
* but our String is too short */
return false;
}
string++; /* still a match - move to next char */
pattern++; /* still a match - move to next char */
}
break;
case '[': {
if (pattern[1] == 0 or /* missing closing backet ']' in Pattern */
pattern[1] == '[' or /* nested sequence or by mistace '[' in Pattern */
pattern[1] == ']') /* closed barcket without any sequence of chars. */
return false;
if (pattern[1] == '^') { /* we want to exclude one or more chars */
pattern += 2; /* move to char after "[^" */
while(pattern[0] != ']') {
if (pattern[1] == '-') { /* a range of chars is to be excluded */
if (string[0] >= pattern[0] and /* actual char in String begins after begin of excluded range */
string[0] <= pattern[2]) /* actual char in String ends before end of excluded range */
/* actual char is in excluded range */
return false;
else
/* still a match, skip range in Pattern */
pattern += 3;
}
else {
if (string[0] == pattern[0])
/* we found exactly the excluded char -> no match */
return false;
else
/* still a match, continue */
pattern++;
}
}
} /* end '^' */
else { /* we want to include one or more chars */
pattern++; /* next char is after the '[' */
result = false;
while(pattern[0] != ']') {
if (pattern[1] == '-') { /* a range of chars is to be included */
if (string[0] >= pattern[0] and /* actual char in String begins after begin of included range */
string[0] <= pattern[2]) { /* actual char in String ends before end of included range */
/* actual char is in included range */
result = true;
break;
}
else
/* result is already false. But - couldn't we return false here ? */
pattern += 3;
}
else {
if (string[0] == pattern[0]) {
/* we found exactly the included char */
result = true;
break;
}
else
/* result is already false. But - couldn't we return false here ? */
pattern++;
}
}
}
if (!result) return false;
while(pattern[0] and pattern[0] != ']') pattern++;
if (! pattern[0]) return false;
string++;
pattern++;
}
break;
default:
if (string[0] != pattern[0]) { /* compare two single characters. */
return false;
}
string++;
pattern++;
}
}
}
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