Fix casepath chaos

src/audio/oal/stream.cpp

@@ -203,15 +203,11 @@ CStream::CStream(char *filename, ALuint &source, ALuint (&buffers)[NUM_STREAMBUF
 {
 // Be case-insensitive on linux (from https://github.com/OneSadCookie/fcaseopen/)
 #if !defined(_WIN32)
-	FILE *test = fopen(filename, "r");
-	if (!test) {
-		char *r = (char*)alloca(strlen(filename) + 4);
-		if (casepath(filename, r))
-		{
-		    strcpy(m_aFilename, r);
-		}
+	char *real = casepath(filename);
+	if (real) {
+		strcpy(m_aFilename, real);
+		free(real);
 	} else {
-		fclose(test);
 #else
 	{
 #endif

src/core/CdStreamPosix.cpp

@@ -189,10 +189,11 @@ GetGTA3ImgSize(void)
     realpath(gImgNames[0], path);
     if (stat(path, &statbuf) == -1) {
 		// Try case-insensitivity
-		char *r = (char*)alloca(strlen(gImgNames[0]) + 4);
-		if (casepath(gImgNames[0], r))
+		char* real = casepath(gImgNames[0], false);
+		if (real)
 		{
-			realpath(r, path);
+			realpath(real, path);
+			free(real);
     		if (stat(path, &statbuf) != -1)
 				goto ok;
 		}
@@ -210,7 +211,6 @@ CdStreamShutdown(void)
 {
     // Destroying semaphores and free(gpReadInfo) will be done at threads
 #ifndef ONE_THREAD_PER_CHANNEL
-    free(gChannelRequestQ.items);
     gCdStreamThreadStatus = 2;
     sem_post(&gCdStreamSema);
 #endif
@@ -442,6 +442,7 @@ void *CdStreamThread(void *param)
         sem_destroy(&gpReadInfo[i].pDoneSemaphore);
     }
     sem_destroy(&gCdStreamSema);
+	free(gChannelRequestQ.items);
 #else
     sem_destroy(&gpReadInfo[channel].pStartSemaphore);
     sem_destroy(&gpReadInfo[channel].pDoneSemaphore);
@@ -460,10 +461,11 @@ CdStreamAddImage(char const *path)
 
 	// Fix case sensitivity and backslashes.
 	if (gImgFiles[gNumImages] == -1) {
-		char *r = (char*)alloca(strlen(path) + 4);
-		if (casepath(path, r))
+		char* real = casepath(path, false);
+		if (real)
 		{
-		    gImgFiles[gNumImages] = open(r, _gdwCdStreamFlags);
+		    gImgFiles[gNumImages] = open(real, _gdwCdStreamFlags);
+			free(real);
 		}
 	}
 

src/core/FileMgr.cpp

@@ -4,6 +4,7 @@
 #include <direct.h>
 #endif
 #include "common.h"
+#include "crossplatform.h"
 
 #include "FileMgr.h"
 
@@ -31,19 +32,16 @@ static myFILE myfiles[NUMFILES];
 #include <dirent.h>
 #include <errno.h>
 #include <unistd.h>
-#include "crossplatform.h"
 #define _getcwd getcwd
 
 // Case-insensitivity on linux (from https://github.com/OneSadCookie/fcaseopen)
 void mychdir(char const *path)
 {
-    char *r = (char*)alloca(strlen(path) + 4);
-    if (casepath(path, r))
-    {
+	char* r = casepath(path, false);
+    if (r) {
         chdir(r);
-    }
-    else
-    {
+		free(r);
+    } else {
         errno = ENOENT;
     }
 }
@@ -73,30 +71,7 @@ found:
 	*p++ = 'b';
 	*p = '\0';
 	
-#if !defined(_WIN32)
-	char *newPath = strdup(filename);
-	// Normally casepath() fixes backslashes, but if the mode is sth other than r/rb it will create new file with backslashes on linux, so fix backslashes here
-	char *nextBs;
-	while(nextBs = strstr(newPath, "\\")){
-		*nextBs = '/';
-	}
-#else
-	const char *newPath = filename;
-#endif
-
-	myfiles[fd].file = fopen(newPath, realmode);
-// Be case-insensitive on linux (from https://github.com/OneSadCookie/fcaseopen/)
-#if !defined(_WIN32)
-	if (!myfiles[fd].file) {
-		char *r = (char*)alloca(strlen(newPath) + 4);
-		if (casepath(newPath, r))
-		{
-		    myfiles[fd].file = fopen(r, realmode);
-		}
-	}
-
-	free(newPath);
-#endif
+	myfiles[fd].file = fcaseopen(filename, realmode);
 	if(myfiles[fd].file == nil)
 		return 0;
 	return fd;

src/fakerw/fake.cpp

@@ -375,23 +375,19 @@ RwStream *RwStreamOpen(RwStreamType type, RwStreamAccessType accessType, const v
 		file = rwNewT(StreamFile, 1, 0);
 		memcpy(file, &fakefile, sizeof(StreamFile));
 #ifndef _WIN32
-		// Be case-insensitive and fix backslashes (from https://github.com/OneSadCookie/fcaseopen/)
-		FILE* first = fopen((char*)pData, "r");
-		char *r;
-		if (!first) {
-			r = (char*)alloca(strlen((char*)pData) + 4);
-			// Use default path(and pass error handling to librw) if we can't find any match
-			if (!casepath((char*)pData, r))
-				r = (char*)pData;
-		} else
-			fclose(first);
-
-		if(file->open((char*)r, mode))
+		char *r = casepath((char*)pData);
+		if (r) {
+			if (file->open((char*)r, mode)) {
+				free(r);
 				return file;
-#else
+			}
+			free(r);
+		} else
+#endif
+		{
 			if (file->open((char*)pData, mode))
 				return file;
-#endif
+		}
 		rwFree(file);
 		return nil;
 	}
@@ -859,15 +855,14 @@ RwImage *
 RtBMPImageWrite(RwImage *image, const RwChar *imageName)
 {
 #ifndef _WIN32
-	char *r = nil;
-	FILE *valid = fopen((char *)imageName, "r");
-	if(!valid) {
-		char *r = (char *)alloca(strlen((char *)imageName) + 4);
-		// Use default path(and pass error handling to librw) if we can't find any match
-		if(!casepath((char *)imageName, r)) r = (char *)imageName;
-	} else
-		fclose(valid);
+	char *r = casepath(imageName);
+	if (r) {
 		rw::writeBMP(image, r);
+		free(r);
+	} else {
+		rw::writeBMP(image, imageName);
+	}
+	
 #else
 	rw::writeBMP(image, imageName);
 #endif
@@ -877,15 +872,16 @@ RwImage *
 RtBMPImageRead(const RwChar *imageName)
 {
 #ifndef _WIN32
-	char *r = nil;
-	FILE *valid = fopen((char *)imageName, "r");
-	if(!valid) {
-		r = (char *)alloca(strlen((char *)imageName) + 4);
-		// Use default path(and pass error handling to librw) if we can't find any match
-		if(!casepath((char *)imageName, r)) r = (char *)imageName;
-	} else
-		fclose(valid);
-	return rw::readBMP(r);
+	RwImage *image;
+	char *r = casepath(imageName);
+	if (r) {
+		image = rw::readBMP(r);
+		free(r);
+	} else {
+		image = rw::readBMP(imageName);
+	}
+	return image;
+
 #else
 	return rw::readBMP(imageName);
 #endif

src/skel/crossplatform.cpp

@@ -116,86 +116,117 @@ char *trim(char *s) {
     return s;
 }
 
-// Case-insensitivity on linux (from https://github.com/OneSadCookie/fcaseopen)
-// r must have strlen(path) + 2 bytes
-int casepath(char const *path, char *r)
+FILE* _fcaseopen(char const* filename, char const* mode)
 {
+    FILE* result;
+    char* real = casepath(filename);
+    if (!real)
+        result = fopen(filename, mode);
+    else {
+        result = fopen(real, mode);
+        free(real);
+    }
+    return result;
+}
+
+// Case-insensitivity on linux (from https://github.com/OneSadCookie/fcaseopen)
+// Returned string should freed manually (if exists)
+char* casepath(char const* path, bool checkPathFirst)
+{
+    if (checkPathFirst && access(path, F_OK) != -1) {
+        // File path is correct
+        return nil;
+    }
+
     size_t l = strlen(path);
     char* p = (char*)alloca(l + 1);
+    char* out = (char*)malloc(l + 3); // for extra ./
     strcpy(p, path);
 
-    // my addon: change \'s with /
-	char *nextBs;
-	while(nextBs = strstr(p, "\\")){
-		*nextBs = '/';
-	}
-	
     // my addon: linux doesn't handle filenames with spaces at the end nicely
     p = trim(p);
 
     size_t rl = 0;
 
     DIR* d;
-    if (p[0] == '/')
+    if (p[0] == '/' || p[0] == '\\')
     {
         d = opendir("/");
-        p = p + 1;
     }
     else
     {
         d = opendir(".");
-        r[0] = '.';
-        r[1] = 0;
+        out[0] = '.';
+        out[1] = 0;
         rl = 1;
     }
 
-    int last = 0;
-    char *c = strsep(&p, "/");
-    while (c)
+    bool cantProceed = false; // just convert slashes in what's left in string, not case sensitivity
+    bool mayBeTrailingSlash = false;
+    char* c;
+    while (c = strsep(&p, "/\\"))
     {
-        if (!d)
+        // May be trailing slash(allow), slash at the start(avoid), or multiple slashes(avoid)
+        if (*c == '\0')
         {
-            return 0;
+            mayBeTrailingSlash = true;
+            continue;
+        } else {
+            mayBeTrailingSlash = false;
         }
 
-        if (last)
-        {
-            closedir(d);
-            return 0;
-        }
-        
-        r[rl] = '/';
+        out[rl] = '/';
         rl += 1;
-        r[rl] = 0;
+        out[rl] = 0;
 
-        struct dirent *e = readdir(d);
-        while (e)
+        if (cantProceed)
+        {
+            strcpy(out + rl, c);
+            rl += strlen(c);
+            continue;
+        }
+
+        struct dirent* e;
+        while (e = readdir(d))
         {
             if (strcasecmp(c, e->d_name) == 0)
             {
-                strcpy(r + rl, e->d_name);
-                rl += strlen(e->d_name);
+                strcpy(out + rl, e->d_name);
+                int reportedLen = (int)strlen(e->d_name);
+                rl += reportedLen;
+                assert(reportedLen == strlen(c) && "casepath: This is not good at all");
 
                 closedir(d);
-                d = opendir(r);
+                d = opendir(out);
+
+                // Either it wasn't a folder, or permission error, I/O error etc.
+                if (!d) {
+                    cantProceed = true;
+                }
 
                 break;
             }
-
-            e = readdir(d);
         }
 
         if (!e)
         {
-            strcpy(r + rl, c);
+            printf("casepath couldn't find dir/file \"%s\", full path was %s\n", c, path);
+            // No match, add original name and continue converting further slashes.
+            strcpy(out + rl, c);
             rl += strlen(c);
-            last = 1;
+            cantProceed = true;
         }
-        
-        c = strsep(&p, "/");
     }
 
     if (d) closedir(d);
-    return 1;
+    if (mayBeTrailingSlash) {
+        out[rl] = '/';  rl += 1;
+        out[rl] = '\0';
+    }
+
+    if (rl > l + 2) {
+        printf("\n\ncasepath: Corrected path length is longer then original+2:\n\tOriginal: %s (%d chars)\n\tCorrected: %s (%d chars)\n\n", path, l, out, rl);
+    }
+    return out;
 }
 #endif

src/skel/crossplatform.h

@@ -23,7 +23,7 @@ enum eWinVersion
 #include "win.h"
 #endif
 extern DWORD _dwOperatingSystemVersion;
-
+#define fcaseopen fopen
 #else
 char *strupr(char *str);
 char *strlwr(char *str);
@@ -43,7 +43,9 @@ enum {
 };
 
 extern long _dwOperatingSystemVersion;
-int casepath(char const *path, char *r);
+char *casepath(char const *path, bool checkPathFirst = true);
+FILE *_fcaseopen(char const *filename, char const *mode);
+#define fcaseopen _fcaseopen
 #endif
 
 #ifdef RW_GL3