(svn r1821) Move generic string handling functions to string.[ch] and introduce stre{cpy,cat}, see string.h for their semantics

string.c

@@ -0,0 +1,39 @@
+#include "stdafx.h"
+#include "string.h"
+
+void ttd_strlcat(char *dst, const char *src, size_t size)
+{
+	assert(size > 0);
+	for (; size > 0 && *dst != '\0'; --size, ++dst) {}
+	assert(size > 0);
+	while (--size > 0 && *src != '\0') *dst++ = *src++;
+	*dst = '\0';
+}
+
+
+void ttd_strlcpy(char *dst, const char *src, size_t size)
+{
+	assert(size > 0);
+	while (--size > 0 && *src != '\0') *dst++ = *src++;
+	*dst = '\0';
+}
+
+
+char* strecat(char* dst, const char* src, const char* last)
+{
+	assert(last == NULL || dst <= last);
+	for (; *dst != '\0'; ++dst)
+		if (dst == last) return dst;
+	for (; *src != '\0' && dst != last; ++dst, ++src) *dst = *src;
+	*dst = '\0';
+	return strecpy(dst, src, last);
+}
+
+
+char* strecpy(char* dst, const char* src, const char* last)
+{
+	assert(last == NULL || dst <= last);
+	for (; *src != '\0' && dst != last; ++dst, ++src) *dst = *src;
+	*dst = '\0';
+	return dst;
+}