X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=libs%2Fassfile%2Fmod_path.c;fp=libs%2Fassfile%2Fmod_path.c;h=dbad402bc14a0281a0b62c1704507fa4787b1021;hb=dd7ce87b0ad2b8a1b4758bcc9354e993b71c8599;hp=0000000000000000000000000000000000000000;hpb=48ee87d8c32791d17fa7a57076df5d6721d6c05c;p=raydungeon

diff --git a/libs/assfile/mod_path.c b/libs/assfile/mod_path.c
new file mode 100644
index 0000000..dbad402
--- /dev/null
+++ b/libs/assfile/mod_path.c
@@ -0,0 +1,101 @@
+/*
+assfile - library for accessing assets with an fopen/fread-like interface
+Copyright (C) 2018  John Tsiombikas <nuclear@member.fsf.org>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+
+#ifdef __MSVCRT__
+#include <malloc.h>
+#else
+#include <alloca.h>
+#endif
+
+#include "assfile_impl.h"
+
+
+static void *fop_open(const char *fname, void *udata);
+static void fop_close(void *fp, void *udata);
+static long fop_seek(void *fp, long offs, int whence, void *udata);
+static long fop_read(void *fp, void *buf, long size, void *udata);
+
+
+struct ass_fileops *ass_alloc_path(const char *path)
+{
+	char *p;
+	struct ass_fileops *fop;
+
+	if(!(fop = malloc(sizeof *fop))) {
+		return 0;
+	}
+	if(!(p = malloc(strlen(path) + 1))) {
+		free(fop);
+		return 0;
+	}
+	fop->udata = p;
+
+	while(*path) {
+		*p++ = *path++;
+	}
+	while(p > (char*)fop->udata && (p[-1] == '/' || isspace(p[-1]))) p--;
+	*p = 0;
+
+	fop->open = fop_open;
+	fop->close = fop_close;
+	fop->seek = fop_seek;
+	fop->read = fop_read;
+	return fop;
+}
+
+void ass_free_path(struct ass_fileops *fop)
+{
+	free(fop->udata);
+}
+
+static void *fop_open(const char *fname, void *udata)
+{
+	const char *asspath = (char*)udata;
+	char *path;
+	FILE *fp;
+
+	path = alloca(strlen(asspath) + strlen(fname) + 2);
+	sprintf(path, "%s/%s", asspath, fname);
+
+	if(!(fp = fopen(path, "rb"))) {
+		ass_errno = errno;
+		return 0;
+	}
+	return fp;
+}
+
+static void fop_close(void *fp, void *udata)
+{
+	fclose(fp);
+}
+
+static long fop_seek(void *fp, long offs, int whence, void *udata)
+{
+	fseek(fp, offs, whence);
+	return ftell(fp);
+}
+
+static long fop_read(void *fp, void *buf, long size, void *udata)
+{
+	return fread(buf, 1, size, fp);
+}