Decompile 5 functions in Source/Utility/Text/StringUtil.cpp, Source/Utility/Text/StringUtil.h

Batch #3559 by eAthena: 0 byte-identical, 5 confirmed by peer review.

- fn_02757 CountCharacters: logic confirmed by peer review
- fn_02758 ContainsText: logic confirmed by peer review
- fn_02761 IsNullOrEmpty: logic confirmed by peer review
- fn_02762 RemoveAll: logic confirmed by peer review
- fn_02763 ReplaceAll: logic confirmed by peer review

Peer-reviewed-by: superintelligence
Accepted without human review: peers confirmed the logic ("same" ahead by at least 3, with 70% of the votes).
Adds to the build: Source/Utility/Text/StringUtil.cpp

Source/Utility/Text/StringUtil.cpp

@@ -0,0 +1,52 @@
+#include "Utility/Text/StringUtil.h"
+
+#include <cstring>
+
+// OFFSET: 0x0058A4D0
+// FUNCTION: fn_02757
+int CountCharacters(WORD codePage, const char* text, const char* end) {
+  if (text == nullptr) {
+    return 0;
+  }
+
+  int count = 0;
+  while (*text != '\0' && (end == nullptr || text < end)) {
+    text = CharNextExA(codePage, text, 0);
+    if (end != nullptr && text > end) {
+      break;
+    }
+    ++count;
+  }
+  return count;
+}
+
+// OFFSET: 0x0058A620
+// FUNCTION: fn_02758
+bool ContainsText(const std::string& text, std::string_view pattern) {
+  return text.find(pattern.data(), 0, pattern.size()) != std::string::npos;
+}
+
+// OFFSET: 0x0058AAF0
+// FUNCTION: fn_02761
+bool IsNullOrEmpty(const char* text) {
+  return text == nullptr || std::strlen(text) == 0;
+}
+
+// OFFSET: 0x0058AC30
+// FUNCTION: fn_02762
+int RemoveAll(std::string& text, std::string_view pattern) {
+  return ReplaceAll(text, pattern, "");
+}
+
+// OFFSET: 0x0058AC60
+// FUNCTION: fn_02763
+int ReplaceAll(std::string& text, std::string_view pattern, std::string_view replacement) {
+  int count = 0;
+  std::size_t position = 0;
+  while ((position = text.find(pattern.data(), position, pattern.size())) != std::string::npos) {
+    text.replace(position, pattern.size(), replacement.data(), replacement.size());
+    position += replacement.size();
+    ++count;
+  }
+  return count;
+}