lineedit: improvements to tab completion

Since getpwent isn't implemented for WIN32 there's no point in
enabling FEATURE_USERNAME_COMPLETION.

Use case-insensitive comparisons when matching filenames.

The code to exclude non-executables when tab completing executables
is WIN32-specific and shouldn't omit directories.

2 files changed, 22 insertions, 10 deletions

diff --git a/libbb/compare_string_array.c b/libbb/compare_string_array.c
index 01a9df0e2..7ccdaef8a 100644
--- a/libbb/compare_string_array.c
+++ b/libbb/compare_string_array.c
@@ -27,6 +27,19 @@ char* FAST_FUNC is_prefixed_with(const char *string, const char *key)
 #endif
 }
 
+#if ENABLE_PLATFORM_MINGW32
+char* FAST_FUNC is_prefixed_with_case(const char *string, const char *key)
+{
+        while (*key != '\0') {
+                if (tolower(*key) != tolower(*string))
+                        return NULL;
+                key++;
+                string++;
+        }
+        return (char*)string;
+}
+#endif
+
 /*
  * Return NULL if string is not suffixed with key. Return pointer to the
  * beginning of prefix key in string. If key is an empty string return pointer
diff --git a/libbb/lineedit.c b/libbb/lineedit.c
index 19b579782..979e0d544 100644
--- a/libbb/lineedit.c
+++ b/libbb/lineedit.c
@@ -681,6 +681,11 @@ static void input_forward(void)
 //Also, perhaps "foo b<TAB> needs to complete to "foo bar" <cursor>,
 //not "foo bar <cursor>...
 
+# if ENABLE_PLATFORM_MINGW32
+/* use case-insensitive comparisons for filenames */
+#  define is_prefixed_with(s, k) is_prefixed_with_case(s, k)
+# endif
+
 static void free_tab_completion_data(void)
 {
         if (matches) {
@@ -897,8 +902,11 @@ static NOINLINE unsigned complete_cmd_dir_file(const char *command, int type)
                         if (stat(found, &st) && lstat(found, &st))
                                 goto cont; /* hmm, remove in progress? */
 
-                        if (type == FIND_EXE_ONLY && !file_is_executable(found))
+# if ENABLE_PLATFORM_MINGW32
+                        if (type == FIND_EXE_ONLY && !S_ISDIR(st.st_mode) &&
+                                        !file_is_executable(found))
                                 goto cont;
+# endif
 
                         /* Save only name */
                         len = strlen(name_found);
@@ -2005,16 +2013,7 @@ static void parse_and_put_prompt(const char *prmt_ptr)
                                                         char *after_home_user;
 
                                                         /* /home/user[/something] -> ~[/something] */
-#if !ENABLE_PLATFORM_MINGW32
                                                         after_home_user = is_prefixed_with(cwd_buf, home_pwd_buf);
-#else
-                                                        after_home_user = NULL;
-                                                        l = strlen(home_pwd_buf);
-                                                        if (l != 0
-                                                         && strncasecmp(home_pwd_buf, cwd_buf, l) == 0) {
-                                                                after_home_user = cwd_buf + l;
-                                                        }
-#endif
                                                         if (after_home_user
                                                          && (*after_home_user == '/' || *after_home_user == '\0')
                                                         ) {