Regex: Add regex_replace native.

dlls/regex/CRegEx.h

@@ -34,6 +34,19 @@
 #define _INCLUDE_CREGEX_H
  
 #include <am-vector.h>
+#include <am-string.h>
+
+/**
+ * Maximum number of sub-patterns, here 50 (this should be a multiple of 3).
+ */
+#define REGEX_MAX_SUBPATTERNS 150
+
+/**
+ * Flags to used with regex_replace, to control the replacement behavior.
+ */
+#define REGEX_FORMAT_DEFAULT   0  // Uses the standard formatting rules to replace matches.
+#define REGEX_FORMAT_NOCOPY    1  // The sections that do not match the regular expression are not copied when replacing matches.
+#define REGEX_FORMAT_FIRSTONLY 2  // Only the first occurrence of a regular expression is replaced.
 
 class RegEx
 {
@@ -42,6 +55,11 @@ public:
 		int start, end;
 	};
 
+	struct NamedGroup {
+		ke::AString name;
+		size_t index;
+	};
+
 	RegEx();
 	~RegEx();
 
@@ -52,8 +70,11 @@ public:
 	int Compile(const char *pattern, int iFlags);
 	int Match(const char *str);
 	int MatchAll(const char *str);
+	int Replace(char *text, size_t text_maxlen, const char *replace, size_t replaceLen, int flags = 0);
 	void ClearMatch();
-	const char *GetSubstring(int s, char buffer[], int max);
+	const char *GetSubstring(size_t start, char buffer[], size_t max, size_t *outlen = NULL);
+	const char *GetSubstring(size_t start, size_t end, char buffer[], size_t max, size_t *outlen = NULL);
+	void MakeSubpatternsTable(int numSubpatterns);
 
 public:
 	int mErrorOffset;
@@ -63,9 +84,12 @@ public:
 private:
 	pcre *re;
 	bool mFree;
-	int ovector[30];
+	int ovector[REGEX_MAX_SUBPATTERNS];
 	char *subject;
 	ke::Vector<RegExSub> mSubStrings;
+	ke::Vector<size_t> mMatchesSubs;
+	ke::Vector<NamedGroup> mSubsNameTable;
+	int mNumSubpatterns;
 };
 
 #endif //_INCLUDE_CREGEX_H