update to fix win build with sheet (#229)

* update to fix win build
* on win, skip the check for literal UTF-8
* TO DO: find a way to add win `sheet` automated tests

app/sheet.c

@@ -208,10 +208,12 @@ int ZSV_MAIN_FUNC(ZSV_COMMAND)(int argc, const char *argv[], struct zsv_opts *op
   const char *locale = setlocale(LC_ALL, "C.UTF-8");
   if (!locale || strstr(locale, "UTF-8") == NULL)
     locale = setlocale(LC_ALL, "");
+#if !defined(WIN32) && !defined(_WIN32)
   if (!locale || strstr(locale, "UTF-8") == NULL) {
     fprintf(stderr, "Unable to set locale to UTF-8\n");
     return 1; // TO DO: option to continue
   }
+#endif
 
   if (!terminfo_ok()) {
     fprintf(stderr, "Warning: unable to set or detect TERMINFO\n");
@@ -225,7 +227,7 @@ int ZSV_MAIN_FUNC(ZSV_COMMAND)(int argc, const char *argv[], struct zsv_opts *op
   size_t header_span = 0; // number of rows that comprise the header
   int err;
   {
-    struct zsvsheet_ui_buffer *tmp_ui_buffer;
+    struct zsvsheet_ui_buffer *tmp_ui_buffer = NULL;
     zsvsheet_ui_buffer_new_blank(&tmp_ui_buffer);
     if (!tmp_ui_buffer) {
       fprintf(stderr, "Out of memory!\n");
@@ -440,8 +442,17 @@ const char *display_cell(struct zsvsheet_buffer *buff, size_t data_row, size_t d
 
     // convert the substring to wide characters
     wchar_t wsubstring[256]; // Ensure this buffer is large enough
+#if defined(WIN32) || defined(_WIN32)
+    // windows does not have mbsnrtowcs
+    char *p = (char *)str;
+    char tmp_ch = p[nbytes];
+    p[nbytes] = '\0';
+    size_t wlen = mbstowcs(wsubstring, p, sizeof(wsubstring) / sizeof(wchar_t));
+    p[nbytes] = tmp_ch;
+#else
     const char *p = str;
     size_t wlen = mbsnrtowcs(wsubstring, &p, nbytes, sizeof(wsubstring) / sizeof(wchar_t), NULL);
+#endif
     if (wlen == (size_t)-1) {
       fprintf(stderr, "Unable to convert to wide chars: %s\n", str);
       return str;

configure

@@ -523,17 +523,18 @@ if [ "$TRY_SHEET" != "no" ]; then
     if tryldflag LDFLAGS_NCURSESW -lncursesw -L${PREFIX}/lib ; then
         LDFLAGS_NCURSES=-lncursesw
         NCLIB=ncursesw
-        if [ "$NCURSES_DYNAMIC" != "" ] ; then
+        if [ "$NCURSES_DYNAMIC" == "" ] ; then
             CFLAGS_NCURSES="-DHAVE_NCURSESW -DNCURSESW_STATIC"
         else
             CFLAGS_NCURSES="-DHAVE_NCURSESW"
         fi
-    elif tryldflag LDFLAGS_NCURSES -lncurses -L${PREFIX}/lib ; then
+    fi
+    if tryldflag LDFLAGS_NCURSES -lncurses -L${PREFIX}/lib ; then
         NCLIB=ncurses
-        if [ "$NCURSES_DYNAMIC" != "" ] ; then
-            CFLAGS_NCURSES="-DHAVE_NCURSES -DNCURSES_STATIC"
+        if [ "$NCURSES_DYNAMIC" == "" ] ; then
+            CFLAGS_NCURSES+="-DHAVE_NCURSES -DNCURSES_STATIC"
         else
-            CFLAGS_NCURSES=-DHAVE_NCURSES
+            CFLAGS_NCURSES+=-DHAVE_NCURSES
         fi
     fi
     ZSVSHEET_BUILD=1