Linux build support

src/skel/crossplatform.cpp

@@ -1,5 +1,4 @@
 #include "common.h"
-#define USEALTERNATIVEWINFUNCS
 #include "crossplatform.h"
 
 // For internal use
@@ -20,7 +19,8 @@ void GetLocalTime_CP(SYSTEMTIME *out) {
     tmToSystemTime(localTm, out);
 }
 
-#if !defined _WIN32 || defined __MINGW32__
+// Compatible with Linux/POSIX and MinGW on Windows
+#ifndef _WIN32
 HANDLE FindFirstFile(const char* pathname, WIN32_FIND_DATA* firstfile) {
 	char newpathname[32];
 	strncpy(newpathname, pathname, 32);
@@ -34,7 +34,7 @@ HANDLE FindFirstFile(const char* pathname, WIN32_FIND_DATA* firstfile) {
 		strncpy(firstfile->extension, "", sizeof(firstfile->extension));
 
 	HANDLE d;
-	if ((d = opendir(path)) == NULL || !FindNextFile(d, firstfile))
+	if ((d = (HANDLE)opendir(path)) == NULL || !FindNextFile(d, firstfile))
 		return NULL;
 
 	return d;
@@ -45,7 +45,7 @@ bool FindNextFile(HANDLE d, WIN32_FIND_DATA* finddata) {
 	static struct stat fileStats;
 	static char path[PATH_MAX], relativepath[NAME_MAX + sizeof(finddata->folder) + 1];
 	int extensionLen = strlen(finddata->extension);
-	while ((file = readdir(d)) != NULL) {
+	while ((file = readdir((DIR*)d)) != NULL) {
 
 		// We only want "DT_REG"ular Files, but reportedly some FS and OSes gives DT_UNKNOWN as type.
 		if ((file->d_type == DT_UNKNOWN || file->d_type == DT_REG) &&
@@ -78,4 +78,119 @@ void FileTimeToSystemTime(time_t* writeTime, SYSTEMTIME* out) {
 	tm *ptm = gmtime(writeTime);
 	tmToSystemTime(ptm, out);
 }
-#endif
+#endif
+
+#ifndef _WIN32
+char *strupr(char *s) {
+   char* tmp = s;
+
+    for (;*tmp;++tmp) {
+        *tmp = toupper((unsigned char) *tmp);
+    }
+
+    return s;
+}
+char *strlwr(char *s) {
+   char* tmp = s;
+
+    for (;*tmp;++tmp) {
+        *tmp = tolower((unsigned char) *tmp);
+    }
+
+    return s;
+}
+
+char *trim(char *s) {
+    char *ptr;
+    if (!s)
+        return NULL;   // handle NULL string
+    if (!*s)
+        return s;      // handle empty string
+    for (ptr = s + strlen(s) - 1; (ptr >= s) && isspace(*ptr); --ptr);
+    ptr[1] = '\0';
+    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)
+{
+    size_t l = strlen(path);
+    char *p = (char*)alloca(l + 1);
+    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] == '/')
+    {
+        d = opendir("/");
+        p = p + 1;
+    }
+    else
+    {
+        d = opendir(".");
+        r[0] = '.';
+        r[1] = 0;
+        rl = 1;
+    }
+    
+    int last = 0;
+    char *c = strsep(&p, "/");
+    while (c)
+    {
+        if (!d)
+        {
+            return 0;
+        }
+        
+        if (last)
+        {
+            closedir(d);
+            return 0;
+        }
+        
+        r[rl] = '/';
+        rl += 1;
+        r[rl] = 0;
+        
+        struct dirent *e = readdir(d);
+        while (e)
+        {
+            if (strcasecmp(c, e->d_name) == 0)
+            {
+                strcpy(r + rl, e->d_name);
+                rl += strlen(e->d_name);
+
+                closedir(d);
+                d = opendir(r);
+                
+                break;
+            }
+
+            e = readdir(d);
+        }
+        
+        if (!e)
+        {
+            strcpy(r + rl, c);
+            rl += strlen(c);
+            last = 1;
+        }
+        
+        c = strsep(&p, "/");
+    }
+    
+    if (d) closedir(d);
+    return 1;
+}
+#endif