win32: native make menuconfig: support search

Previously, pressing slash to search at the menu aborted the menu
program ('mconf'), because regexp is not available with native mingw.

Now it works, but the search is of plain string rather than regexp.

1 files changed, 21 insertions, 5 deletions

diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index 63199cd93..31d5fbbfc 100644
--- a/scripts/kconfig/symbol.c
+++ b/scripts/kconfig/symbol.c
@@ -728,28 +728,43 @@ struct symbol *sym_find(const char *name)
         return symbol;
 }
 
+#if !defined HAVE_RE && !defined __MINGW32__
+#define HAVE_RE 1
+#endif
+
 struct symbol **sym_re_search(const char *pattern)
 {
-#ifdef __MINGW32__
-        fprintf(stderr, "NOTIMPL: sym_re_search\n");
-        exit(1);
-#else
         struct symbol *sym, **sym_arr = NULL;
         int i, cnt, size;
+#if HAVE_RE
         regex_t re;
+#else
+        /* without re support use: strstr(sym->name, upper(pattern)) */
+        /* sym->name is a config, e.g. "SHELL_ASH" or "FEATURE_UTMP" */
+        char upat[256] = {0};
+        for (i = 0; i < 255 && pattern[i]; ++i)
+                upat[i] = toupper(pattern[i]);
+#endif
 
         cnt = size = 0;
         /* Skip if empty */
         if (strlen(pattern) == 0)
                 return NULL;
+#if HAVE_RE
         if (regcomp(&re, pattern, REG_EXTENDED|REG_NOSUB|REG_ICASE))
                 return NULL;
+#endif
 
         for_all_symbols(i, sym) {
                 if (sym->flags & SYMBOL_CONST || !sym->name)
                         continue;
+#if HAVE_RE
                 if (regexec(&re, sym->name, 0, NULL, 0))
                         continue;
+#else
+                if (!strstr(sym->name, upat))
+                        continue;
+#endif
                 if (cnt + 1 >= size) {
                         void *tmp = sym_arr;
                         size += 16;
@@ -763,10 +778,11 @@ struct symbol **sym_re_search(const char *pattern)
         }
         if (sym_arr)
                 sym_arr[cnt] = NULL;
+#if HAVE_RE
         regfree(&re);
+#endif
 
         return sym_arr;
-#endif
 }