Use directory structure in cache dir

thumbs.c

@@ -327,7 +327,6 @@ int tns_cache_enabled() {
 
 char* tns_cache_filename(const char *filename) {
 	size_t len;
-	int i;
 	char *cfile, *abspath;
 
 	if (!cache_dir || !filename)
@@ -341,13 +340,7 @@ char* tns_cache_filename(const char *filename) {
 		strcpy(abspath, filename);
 	}
 
-	len = strlen(abspath);
-	for (i = 0; i < len; ++i) {
-		if (abspath[i] == '/')
-			abspath[i] = '%';
-	}
-
-	len += strlen(cache_dir) + 6;
+	len = strlen(cache_dir) + strlen(abspath) + 6;
 	cfile = (char*) s_malloc(len);
 	snprintf(cfile, len, "%s/%s.png", cache_dir, abspath + 1);
 	
@@ -380,10 +373,10 @@ Imlib_Image* tns_cache_load(const char *filename) {
 }
 
 void tns_cache_write(thumb_t *t, Bool force) {
-	char *cfile;
+	char *cfile, *dirend;
 	struct stat cstats, fstats;
 	struct timeval times[2];
-	Imlib_Load_Error err;
+	Imlib_Load_Error err = 0;
 
 	if (!t || !t->im || !t->filename)
 		return;
@@ -395,9 +388,17 @@ void tns_cache_write(thumb_t *t, Bool force) {
 		    cstats.st_mtim.tv_sec != fstats.st_mtim.tv_sec ||
 		    cstats.st_mtim.tv_nsec != fstats.st_mtim.tv_nsec)
 		{
+			if ((dirend = strrchr(cfile, '/'))) {
+				*dirend = '\0';
+				err = create_dir_rec(cfile);
+				*dirend = '/';
+			}
+
+			if (!err) {
 				imlib_context_set_image(t->im);
 				imlib_image_set_format("png");
 				imlib_save_image_with_error_return(cfile, &err);
+			}
 
 			if (err) {
 				warn("could not cache thumbnail: %s", t->filename);

util.c

@@ -18,6 +18,8 @@
 
 #include <stdlib.h>
 #include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
 #include <unistd.h>
 #include <errno.h>
 
@@ -156,6 +158,47 @@ end:
 	return path;
 }
 
+int create_dir_rec(const char *path) {
+	char *dir, *d;
+	struct stat stats;
+	int err = 0;
+
+	if (!path || !*path)
+		return -1;
+
+	if (!stat(path, &stats)) {
+		if (S_ISDIR(stats.st_mode)) {
+			return 0;
+		} else {
+			warn("not a directory: %s", path);
+			return -1;
+		}
+	}
+
+	d = dir = (char*) s_malloc(strlen(path) + 1);
+	strcpy(dir, path);
+
+	while (d != NULL && !err) {
+		d = strchr(d + 1, '/');
+		if (d != NULL)
+			*d = '\0';
+		if (access(dir, F_OK) && errno == ENOENT) {
+			if (mkdir(dir, 0755)) {
+				warn("could not create directory: %s", dir);
+				err = -1;
+			}
+		} else if (stat(dir, &stats) || !S_ISDIR(stats.st_mode)) {
+			warn("not a directory: %s", dir);
+			err = -1;
+		}
+		if (d != NULL)
+			*d = '/';
+	}
+	free(dir);
+
+	return err;
+}
+
 char* readline(FILE *stream) {
 	size_t len;
 	char *buf, *s, *end;

util.h

@@ -44,6 +44,7 @@ void die(const char*, ...);
 void size_readable(float*, const char**);
 
 char* absolute_path(const char*);
+int create_dir_rec(const char*);
 
 char* readline(FILE*);