From aa99b2e1d31413fb9ff9af452912a77e3d5d8abf Mon Sep 17 00:00:00 2001
From: Alexander Arkhipov <119879895+drjfaust@users.noreply.github.com>
Date: Wed, 26 Apr 2023 17:45:36 +0300
Subject: [PATCH] Convert file paths to correct case (#214)

---
 src/platform_compat.cc | 61 ++++++++++++++++++++++++++++++++++++++++++
 src/platform_compat.h  |  1 +
 2 files changed, 62 insertions(+)

diff --git a/src/platform_compat.cc b/src/platform_compat.cc
index b629fb6..e47e974 100644
--- a/src/platform_compat.cc
+++ b/src/platform_compat.cc
@@ -12,6 +12,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #else
+#include <dirent.h>
 #include <sys/stat.h>
 #include <unistd.h>
 #endif
@@ -204,6 +205,7 @@ int compat_mkdir(const char* path)
     char nativePath[COMPAT_MAX_PATH];
     strcpy(nativePath, path);
     compat_windows_path_to_native(nativePath);
+    compat_resolve_path(nativePath);
 
 #ifdef _WIN32
     return mkdir(nativePath);
@@ -228,6 +230,7 @@ FILE* compat_fopen(const char* path, const char* mode)
     char nativePath[COMPAT_MAX_PATH];
     strcpy(nativePath, path);
     compat_windows_path_to_native(nativePath);
+    compat_resolve_path(nativePath);
     return fopen(nativePath, mode);
 }
 
@@ -236,6 +239,7 @@ gzFile compat_gzopen(const char* path, const char* mode)
     char nativePath[COMPAT_MAX_PATH];
     strcpy(nativePath, path);
     compat_windows_path_to_native(nativePath);
+    compat_resolve_path(nativePath);
     return gzopen(nativePath, mode);
 }
 
@@ -274,6 +278,7 @@ int compat_remove(const char* path)
     char nativePath[COMPAT_MAX_PATH];
     strcpy(nativePath, path);
     compat_windows_path_to_native(nativePath);
+    compat_resolve_path(nativePath);
     return remove(nativePath);
 }
 
@@ -282,10 +287,12 @@ int compat_rename(const char* oldFileName, const char* newFileName)
     char nativeOldFileName[COMPAT_MAX_PATH];
     strcpy(nativeOldFileName, oldFileName);
     compat_windows_path_to_native(nativeOldFileName);
+    compat_resolve_path(nativeOldFileName);
 
     char nativeNewFileName[COMPAT_MAX_PATH];
     strcpy(nativeNewFileName, newFileName);
     compat_windows_path_to_native(nativeNewFileName);
+    compat_resolve_path(nativeNewFileName);
 
     return rename(nativeOldFileName, nativeNewFileName);
 }
@@ -303,6 +310,60 @@ void compat_windows_path_to_native(char* path)
 #endif
 }
 
+void compat_resolve_path(char* path)
+{
+#ifndef _WIN32
+    char* pch = path;
+
+    DIR *dir;
+    if (pch[0] == '/') {
+        dir = opendir("/");
+        pch++;
+    } else {
+        dir = opendir(".");
+    }
+
+    while (dir != NULL) {
+        char* sep = strchr(pch, '/');
+        size_t length;
+        if (sep != NULL) {
+            length = sep - pch;
+        } else {
+            length = strlen(pch);
+        }
+
+        bool found = false;
+
+        struct dirent* entry = readdir(dir);
+        while (entry != NULL) {
+            if (strlen(entry->d_name) == length && compat_strnicmp(pch, entry->d_name, length) == 0) {
+                strncpy(pch, entry->d_name, length);
+                found = true;
+                break;
+            }
+            entry = readdir(dir);
+        }
+
+        closedir(dir);
+        dir = NULL;
+
+        if (!found) {
+            break;
+        }
+
+        if (sep == NULL) {
+            break;
+        }
+
+        *sep = '\0';
+        dir = opendir(path);
+        *sep = '/';
+
+        pch = sep + 1;
+    }
+#endif
+}
+
 char* compat_strdup(const char* string)
 {
     return SDL_strdup(string);
diff --git a/src/platform_compat.h b/src/platform_compat.h
index 9fb7574..345a500 100644
--- a/src/platform_compat.h
+++ b/src/platform_compat.h
@@ -40,6 +40,7 @@ char* compat_gzgets(gzFile stream, char* buffer, int maxCount);
 int compat_remove(const char* path);
 int compat_rename(const char* oldFileName, const char* newFileName);
 void compat_windows_path_to_native(char* path);
+void compat_resolve_path(char* path);
 char* compat_strdup(const char* string);
 long getFileSize(FILE* stream);