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README.md

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+# rren
+
+![](https://img.shields.io/badge/written%20in-C%2B%2B-blue)
+
+A command-line batch renaming client for Windows, using TR1 regexes.
+
+Supports ECMA regexes, string find/replace, and propercasing using globbing file masks. Uses TR1 regexes (so it semi-predates C++11).
+
+Original project page: https://code.google.com/p/rren/
+
+
+## Download
+
+- [⬇️ rren.exe](dist-archive/rren.exe) *(24.50 KiB)*
+- [⬇️ rren.cpp](dist-archive/rren.cpp) *(5.72 KiB)*

dist-archive/rren.cpp

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+// rren
+
+#define RREN_VERSION L"1.1"
+
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+#ifdef _WIN32
+	#ifndef _WIN32_WINNT
+		#define _WIN32_WINNT 0x0500
+	#endif
+	#include <windows.h>
+#else
+	#define EXIT_SUCCESS 0
+	#define EXIT_FAILURE 1
+#endif
+
+#include <stdio.h>
+#include <wchar.h>
+
+#include <string>
+#include <vector>
+#include <regex>
+using namespace std;
+
+struct twostr {
+	wstring first;
+	wstring second;
+};
+
+enum RREN_MODES {
+	RREN_MODE_NONE,
+	RREN_MODE_REGEX,
+	RREN_MODE_REPLACE,
+	RREN_MODE_PCASE
+};
+
+#define BUFF 255
+typedef vector<twostr> V2STR;
+V2STR vFiles;
+
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+#define PRINT_ARGS wprintf( \
+	L"rren v" RREN_VERSION L"\n" \
+	L"Usage: rren mode filemask <args>\n" \
+    L" -e   ECMA Regex     rren -e filemask \"find\" \"replace\"\n" \
+	L" -r   Find/Replace   rren -r filemask \"find\" \"replace\"\n" \
+	L" -p   Proper case    rren -p filemask\n")
+#define PRINT_INVALID_ARGS \
+	wprintf(L"Invalid number of arguments.\n\n"); \
+	PRINT_ARGS;
+
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+// Applies a find/replace ECMAScript regex over all twostr::first in vFiles
+bool do_regex(wchar_t* wcFind, wchar_t* wcReplace) {
+	
+	// Initialise variables
+	tr1::wregex	rFind;
+	wstring		sReplace = wcReplace;
+	try {rFind.assign(wcFind);} catch (...) {
+		wprintf(L"Invalid search regex.\n");
+		return false;
+	}	
+
+	// Loop over vFiles
+	for (V2STR::iterator vi = vFiles.begin(); vi != vFiles.end(); vi++) {
+		vi->second = tr1::regex_replace(vi->first, rFind, sReplace);
+	}
+
+	return true;
+}
+
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+// Applies a find/replace string search over all twostr::first in vFiles
+bool do_replace(wchar_t* wcFind, wchar_t* wcReplace) {
+
+	// Initialise variables
+	if (std::wstring(wcReplace).find(wcFind) != wstring::npos) {
+		wprintf(L"Recursive find/replace.\n");
+		return false;
+	}	
+	size_t pos = wstring::npos;
+	size_t flen = wcslen(wcFind);
+
+	// Loop over vFiles
+	for (V2STR::iterator vi = vFiles.begin(); vi != vFiles.end(); vi++) {
+		vi->second.assign(vi->first);
+		for(;;) {
+			pos = vi->second.find(wcFind);
+			if (pos == wstring::npos) break;
+			vi->second.replace(pos, flen, wcReplace);
+		}
+	}
+	
+	return true;
+}
+
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+// Returns the proper-case version of a wstring
+wstring proper_case(wstring wsInputString) {
+	wstring wBuff(wsInputString);
+	size_t pos = wstring::npos;
+
+	// All lowercase
+	for (;;) {
+		if (++pos > wBuff.size()) break;
+		wBuff[pos] = towlower(wBuff[pos]);
+	}
+
+	// First character becomes uppercase
+	if (wBuff.size() > 0) wBuff[0] = towupper(wBuff[0]);
+
+	// Everything following a space becomes uppercase
+	pos = 0;
+	for (;;) {
+		pos = wBuff.find(L" ", pos+1);
+		if (pos == wstring::npos) break;
+		if (wBuff.size() >= (pos+1)) {
+			wBuff[pos+1] = towupper(wBuff[pos+1]);
+		} else break;
+	}
+
+	return wBuff;
+}
+
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+// Modifies the case of all twostr::first in vFiles
+bool do_pcase() {
+	for (V2STR::iterator vi = vFiles.begin(); vi != vFiles.end(); vi++) {
+		vi->second = proper_case(vi->first);
+	}	
+	return true;
+}
+
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+// Program entry point
+int wmain(int argc, wchar_t* argv[]) {
+
+	// Variables
+	WIN32_FIND_DATA wfd;
+	HANDLE			hFind		= 0;
+	wchar_t			wCwd[BUFF]	= {0};
+	wstring			sSearch;
+	twostr          tsNext;
+	int				iMode		= RREN_MODE_NONE;
+
+	// Validate command-line arguments
+	if (argc < 3) {
+		PRINT_ARGS;	return EXIT_FAILURE;
+	} else if (_wcsnicmp(argv[1], L"-e", 2)==0) {
+		if (argc != 5) {
+			PRINT_INVALID_ARGS;	return EXIT_FAILURE;
+		} else iMode = RREN_MODE_REGEX;
+	} else if (_wcsnicmp(argv[1], L"-r", 2)==0) {
+		if (argc != 5) {
+			PRINT_INVALID_ARGS;	return EXIT_FAILURE;
+		} else iMode = RREN_MODE_REPLACE;
+	} else if (_wcsnicmp(argv[1], L"-p", 2)==0) {
+		if (argc != 3) {
+			PRINT_INVALID_ARGS;	return EXIT_FAILURE;
+		} else iMode = RREN_MODE_PCASE;
+	} else {
+		wprintf(L"Invalid mode.\n");
+		PRINT_ARGS;
+		return EXIT_FAILURE;
+	}
+
+	// Create search mask from working directory
+	GetCurrentDirectory(BUFF-1, wCwd);
+	if (!wcslen(wCwd)) return EXIT_FAILURE;
+	sSearch.assign(wCwd);
+	sSearch.append(L"\\");
+	sSearch.append(argv[2]);
+
+	// Get all file matches
+	hFind = FindFirstFileW(sSearch.c_str(), &wfd);
+	if (!hFind) {
+		wprintf(L"No files.\n");
+		return EXIT_FAILURE;
+	}
+	vFiles.clear();
+	tsNext.first.clear();
+	tsNext.second.clear();
+	do {
+		if (!(wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)) {
+			tsNext.first.assign(wfd.cFileName);
+			vFiles.push_back(tsNext);
+		}
+	} while (FindNextFile(hFind, &wfd));
+	if (vFiles.empty()) {
+		wprintf(L"No files.\n");
+		return EXIT_FAILURE;
+	}
+
+	// Apply transform based on argument
+	switch (iMode) {
+		case RREN_MODE_REGEX:
+			if (!do_regex(argv[3], argv[4])) return EXIT_FAILURE;
+			break;
+		case RREN_MODE_REPLACE:
+			if (!do_replace(argv[3], argv[4])) return EXIT_FAILURE;
+			break;
+		case RREN_MODE_PCASE:
+			if (!do_pcase()) return EXIT_FAILURE;
+			break;
+		default:
+			wprintf(L"Invalid mode.\n");
+			PRINT_ARGS; return EXIT_FAILURE;
+	}
+	
+	// Display all results
+	for (V2STR::iterator vi = vFiles.begin(); vi != vFiles.end(); vi++) {
+		wprintf(L"%s\n--> %s\n", vi->first.c_str(), vi->second.c_str());
+	}
+
+	// Prompt for apply
+	wprintf(L"\nApply changes? (y/n) ");
+	wint_t gwc = getwchar();
+	if (gwc == 'Y' || gwc == 'y') {
+		wprintf(L"Applying changes... ");
+		int count = vFiles.size(), done = 0;
+		for (V2STR::iterator vi = vFiles.begin(); vi != vFiles.end(); vi++) {
+			if (MoveFile(vi->first.c_str(), vi->second.c_str()) == TRUE) done++;
+		}
+		wprintf(L"done (%d / %d).\n", done, count);
+	} else {
+		wprintf(L"No changes were made.\n");
+	}
+
+	// Clean up
+	return EXIT_SUCCESS;
+}
+