From fbd72fd6bf0f02a13be207c9d61f630c594e3156 Mon Sep 17 00:00:00 2001
From: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
Date: Mon, 29 Sep 2014 08:34:37 +0000
Subject: Common: Add a helper function to generate a 8.3 filename from a long
one. Core: Fix the SDMC Directory implementation to make blargSnes work.
---
src/common/file_util.cpp | 42 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
(limited to 'src/common/file_util.cpp')
diff --git a/src/common/file_util.cpp b/src/common/file_util.cpp
index 9292a1cd69..5fd155222d 100644
--- a/src/common/file_util.cpp
+++ b/src/common/file_util.cpp
@@ -780,6 +780,48 @@ size_t ReadFileToString(bool text_file, const char *filename, std::string &str)
return file.ReadArray(&str[0], str.size());
}
+/**
+ * Splits the filename into 8.3 format
+ * Loosely implemented following https://en.wikipedia.org/wiki/8.3_filename
+ * @param filename The normal filename to use
+ * @param short_name A 9-char array in which the short name will be written
+ * @param extension A 4-char array in which the extension will be written
+ */
+void SplitFilename83(const std::string& filename, std::array<char, 9>& short_name,
+ std::array<char, 4>& extension) {
+ const std::string forbidden_characters = ".\"/\\[]:;=, ";
+
+ // On a FAT32 partition, 8.3 names are stored as a 11 bytes array, filled with spaces.
+ short_name = {' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '\0'};
+ extension = {' ', ' ', ' ', '\0'};
+
+ std::string::size_type point = filename.rfind('.');
+ if (point == filename.size() - 1)
+ point = filename.rfind('.', point);
+
+ // Get short name.
+ int j = 0;
+ for (char letter : filename.substr(0, point)) {
+ if (forbidden_characters.find(letter, 0) != std::string::npos)
+ continue;
+ if (j == 8) {
+ // TODO(Link Mauve): also do that for filenames containing a space.
+ // TODO(Link Mauve): handle multiple files having the same short name.
+ short_name[6] = '~';
+ short_name[7] = '1';
+ break;
+ }
+ short_name[j++] = toupper(letter);
+ }
+
+ // Get extension.
+ if (point != std::string::npos) {
+ j = 0;
+ for (char letter : filename.substr(point + 1, 3))
+ extension[j++] = toupper(letter);
+ }
+}
+
IOFile::IOFile()
: m_file(NULL), m_good(true)
{}
--
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