From c04da1926fe60312f704cd30da5ba32c66668fb0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kuba=20Podg=C3=B3rski?= <kuba--@users.noreply.github.com>
Date: Tue, 7 Nov 2017 16:51:32 +0100
Subject: [PATCH] Zip entry open/fix 13 (#15)

* Internally replace '\' by '/' for entry name.

* Add tests
---
 src/zip.c   | 33 +++++++++++++++++++++++++++++++--
 test/test.c | 10 +++++-----
 2 files changed, 36 insertions(+), 7 deletions(-)

diff --git a/src/zip.c b/src/zip.c
index 35165c8..b70af89 100644
--- a/src/zip.c
+++ b/src/zip.c
@@ -82,6 +82,21 @@ static int mkpath(const char *path) {
     return 0;
 }
 
+static char *strrpl(const char *str, char old, char new) {
+    char *rpl = (char *)malloc(sizeof(char) * (1 + strlen(str)));
+    char *begin = rpl;
+    char c;
+    while((c = *str++)) {
+        if (c == old) {
+            c = new;
+        }
+        *rpl++ = c;
+    }
+    *rpl = '\0';
+
+    return begin;
+}
+
 struct zip_entry_t {
     int index;
     const char *name;
@@ -174,6 +189,7 @@ void zip_close(struct zip_t *zip) {
 }
 
 int zip_entry_open(struct zip_t *zip, const char *entryname) {
+    char *locname = NULL;
     size_t entrylen = 0;
     mz_zip_archive *pzip = NULL;
     mz_uint num_alignment_padding_bytes, level;
@@ -188,14 +204,27 @@ int zip_entry_open(struct zip_t *zip, const char *entryname) {
     }
 
     pzip = &(zip->archive);
+    /*
+      .ZIP File Format Specification Version: 6.3.3
+
+      4.4.17.1 The name of the file, with optional relative path.
+      The path stored MUST not contain a drive or
+      device letter, or a leading slash.  All slashes
+      MUST be forward slashes '/' as opposed to
+      backwards slashes '\' for compatibility with Amiga
+      and UNIX file systems etc.  If input came from standard
+      input, there is no file name field.
+    */
+    locname = strrpl(entryname, '\\', '/');
 
     if (zip->mode == 'r') {
-        zip->entry.index = mz_zip_reader_locate_file(pzip, entryname, NULL, 0);
+        zip->entry.index = mz_zip_reader_locate_file(pzip, locname, NULL, 0);
+        CLEANUP(locname);
         return (zip->entry.index < 0) ? -1 : 0;
     }
 
     zip->entry.index = zip->archive.m_total_files;
-    zip->entry.name = STRCLONE(entryname);
+    zip->entry.name = locname;
     if (!zip->entry.name) {
         // Cannot parse zip entry name
         return -1;
diff --git a/test/test.c b/test/test.c
index 4a0e7e7..0b9c9f7 100644
--- a/test/test.c
+++ b/test/test.c
@@ -13,7 +13,7 @@ static void test_write(void) {
     struct zip_t *zip = zip_open(ZIPNAME, ZIP_DEFAULT_COMPRESSION_LEVEL, 'w');
     assert(zip != NULL);
 
-    assert(0 == zip_entry_open(zip, "test-1.txt"));
+    assert(0 == zip_entry_open(zip, "test/test-1.txt"));
     assert(0 == zip_entry_write(zip, TESTDATA1, strlen(TESTDATA1)));
     assert(0 == zip_entry_close(zip));
 
@@ -24,7 +24,7 @@ static void test_append(void) {
     struct zip_t *zip = zip_open(ZIPNAME, ZIP_DEFAULT_COMPRESSION_LEVEL, 'a');
     assert(zip != NULL);
 
-    assert(0 == zip_entry_open(zip, "test-2.txt"));
+    assert(0 == zip_entry_open(zip, "test\\test-2.txt"));
     assert(0 == zip_entry_write(zip, TESTDATA2, strlen(TESTDATA2)));
     assert(0 == zip_entry_close(zip));
 
@@ -37,7 +37,7 @@ static void test_read(void) {
     struct zip_t *zip = zip_open(ZIPNAME, 0, 'r');
     assert(zip != NULL);
 
-    assert(0 == zip_entry_open(zip, "test-1.txt"));
+    assert(0 == zip_entry_open(zip, "test\\test-1.txt"));
     assert(0 == zip_entry_read(zip, (void **)&buf, &bufsize));
     assert(bufsize == strlen(TESTDATA1));
     assert(0 == strncmp(buf, TESTDATA1, bufsize));
@@ -46,7 +46,7 @@ static void test_read(void) {
     buf = NULL;
     bufsize = 0;
 
-    assert(0 == zip_entry_open(zip, "test-2.txt"));
+    assert(0 == zip_entry_open(zip, "test/test-2.txt"));
     assert(0 == zip_entry_read(zip, (void **)&buf, &bufsize));
     assert(bufsize == strlen(TESTDATA2));
     assert(0 == strncmp(buf, TESTDATA2, bufsize));
@@ -82,7 +82,7 @@ static void test_extract(void) {
     struct zip_t *zip = zip_open(ZIPNAME, 0, 'r');
     assert(zip != NULL);
 
-    assert(0 == zip_entry_open(zip, "test-1.txt"));
+    assert(0 == zip_entry_open(zip, "test/test-1.txt"));
     assert(0 == zip_entry_extract(zip, on_extract, &buf));
 
     assert(buf.size == strlen(TESTDATA1));