X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=vrlugburz;a=blobdiff_plain;f=src%2Ffs.c;fp=src%2Ffs.c;h=099e890f7b2be41570cd85b990e05a6ecb28fa20;hp=0000000000000000000000000000000000000000;hb=6066118fc6a58b379f52b9aaaf45200b136812b9;hpb=95e4bd8e387c3cb9fc325ae922052bf7bc7ae8ea

diff --git a/src/fs.c b/src/fs.c
new file mode 100644
index 0000000..099e890
--- /dev/null
+++ b/src/fs.c
@@ -0,0 +1,69 @@
+#include <stdio.h>
+#include <string.h>
+#include <alloca.h>
+#include "fs.h"
+
+char *path_dir(const char *path, char *buf)
+{
+	char *sep;
+
+	if(!buf) buf = (char*)path;
+	if(path != buf) {
+		strcpy(buf, path);
+	}
+
+	if((sep = strrchr(buf, '/')) && sep > buf) {
+		*sep = 0;
+	}
+	return buf;
+}
+
+char *path_file(const char *path, char *buf)
+{
+	int len;
+	char *sep;
+
+	if(!buf) buf = (char*)path;
+	if(path != buf) {
+		strcpy(buf, path);
+	}
+
+	if((sep = strrchr(buf, '/'))) {
+		len = strlen(sep + 1);
+		memmove(buf, sep + 1, len + 1);
+	}
+	return buf;
+}
+
+char *combine_path(const char *dirname, const char *fname, char *buf)
+{
+	char *dest;
+
+	if(!buf) return 0;
+
+	if(!dirname || !*dirname) {
+		strcpy(buf, fname);
+		return buf;
+	}
+
+	dest = buf;
+	while(*dirname) *dest++ = *dirname++;
+
+	if(dest[-1] != '/') *dest++ = '/';
+
+	strcpy(dest, fname);
+	return buf;
+}
+
+FILE *fopenat(const char *dirname, const char *fname, const char *attr)
+{
+	char *buf;
+
+	if(!dirname || !*dirname) {
+		return fopen(fname, attr);
+	}
+
+	buf = alloca(strlen(dirname) + strlen(fname) + 2);
+	combine_path(dirname, fname, buf);
+	return fopen(buf, attr);
+}