From 58bd360d6ba20c23b5f4110b5bc757e128b4066e Mon Sep 17 00:00:00 2001
From: elasota <1137273+elasota@users.noreply.github.com>
Date: Mon, 25 Dec 2023 21:21:20 -0500
Subject: [PATCH] Handle backslashes in paths on Windows

---
 lib/helper.c      | 17 +++++++++++++++++
 lib/libunshield.c |  9 +++++++++
 src/unshield.c    | 22 +++++++++++++++++++++-
 3 files changed, 47 insertions(+), 1 deletion(-)

diff --git a/lib/helper.c b/lib/helper.c
index 25ed46a..3978506 100644
--- a/lib/helper.c
+++ b/lib/helper.c
@@ -44,8 +44,16 @@ long int unshield_get_path_max(Unshield* unshield)
 char *unshield_get_base_directory_name(Unshield *unshield) {
     long int path_max = unshield_get_path_max(unshield);
     char *p = strrchr(unshield->filename_pattern, '/');
+#ifdef WIN32
+    char *pbs = strrchr(unshield->filename_pattern, '\\');
+#endif
     char *dirname = malloc(path_max);
 
+#ifdef WIN32
+    if (NULL != pbs && (NULL == p || pbs > p))
+      p = pbs;
+#endif
+
     if (p) {
         strncpy(dirname, unshield->filename_pattern, path_max);
         if ((unsigned int) (p - unshield->filename_pattern) > path_max) {
@@ -91,11 +99,20 @@ FILE* unshield_fopen_for_reading(Unshield* unshield, int index, const char* suff
     char* filename = get_filename(unshield, index, suffix);
     char* dirname = unshield_get_base_directory_name(unshield);
     const char *q;
+#ifdef WIN32
+    const char *qbs;
+#endif
     struct dirent *dent = NULL;
     DIR *sourcedir = NULL;
     long int path_max = unshield_get_path_max(unshield);
 
     q=strrchr(filename,'/');
+#ifdef WIN32
+    qbs = strrchr(filename, '\\');
+    if (NULL != qbs && (NULL == q || qbs > q))
+      q = qbs;
+#endif
+
     if (q)
       q++;
     else
diff --git a/lib/libunshield.c b/lib/libunshield.c
index e3dd06a..7e5e8ec 100644
--- a/lib/libunshield.c
+++ b/lib/libunshield.c
@@ -98,6 +98,15 @@ static bool unshield_create_filename_pattern(Unshield* unshield, const char* fil
     char pattern[256];
     char* prefix = strdup(filename);
     char* p = strrchr(prefix, '/');
+#ifdef WIN32
+    char *pbs = strrchr(prefix, '\\');
+#endif
+
+#ifdef WIN32
+    if (NULL != pbs && (NULL == p || pbs > p))
+      p = pbs;
+#endif
+
     if (!p)
       p = prefix;
 
diff --git a/src/unshield.c b/src/unshield.c
index 470a397..b3a70da 100644
--- a/src/unshield.c
+++ b/src/unshield.c
@@ -96,15 +96,35 @@ static bool make_sure_directory_exists(const char* directory)/*{{{*/
       p+=2;
     else if (0 == strncmp(p, "../", 3))
       p+=3;
+#ifdef WIN32
+    if ('\\' == *p)
+      p++;
+    else if (0 == strncmp(p, ".\\", 2))
+      p += 2;
+    else if (0 == strncmp(p, "..\\", 3))
+      p += 3;
+#endif
     else
     {
+      int is_win_root = 0;
       const char* slash = strchr(p, '/');
+#ifdef WIN32
+      const char* backslash = strchr(p, '/');
+      if (NULL != backslash && (NULL == slash || backslash < slash))
+        slash = backslash;
+#endif
+
       current = strdup(directory);
       
       if (slash)
         current[slash-directory] = '\0';
 
-      if (stat(current, &dir_stat) < 0)
+#ifdef WIN32
+      if (slash - directory == 2 && current[1] == ':')
+        is_win_root = 1;
+#endif
+
+      if (!is_win_root && stat(current, &dir_stat) < 0)
       {
         #if defined (__MINGW32__) || defined (_WIN32)
         if (_mkdir(current) < 0)