add wide char for string i/o under Windows

add utf-8 systax check

src/frontend/inpcom.c

@@ -181,6 +181,15 @@ static void pspice_compat_a(struct card *oldcard);
 static struct card *ltspice_compat(struct card *oldcard);
 static void ltspice_compat_a(struct card *oldcard);
 
+#if defined(__MINGW32__) || defined(_MSC_VER)
+#ifndef EXT_ASC
+static int newstat(const char *name, struct _stat *st);
+#endif
+#endif
+#ifndef EXT_ASC
+static void utf8_syntax_check(struct card *deck);
+#endif
+
 struct inp_read_t {
     struct card *cc;
     int line_number;
@@ -619,6 +628,10 @@ struct card *inp_readall(FILE *fp, const char *dir_name,
         struct card *working = cc->nextcard;
 
         delete_libs();
+		
+#ifndef EXT_ASC
+        utf8_syntax_check(working);
+#endif		
 
         /* some syntax checks, including title line */
         inp_check_syntax(cc);
@@ -1282,6 +1295,13 @@ FILE *inp_pathopen(const char *name, const char *mode)
 } /* end of function inp_pathopen */
 
 
+/* for MultiByteToWideChar */
+#if defined(__MINGW32__) || defined(_MSC_VER)
+#ifndef EXT_ASC
+#undef BOOLEAN
+#include <windows.h>
+#endif
+#endif
 
 /*-------------------------------------------------------------------------*
   Look up the variable sourcepath and try everything in the list in order
@@ -1317,6 +1337,17 @@ static char *inp_pathresolve(const char *name)
     /* just try it */
     if (stat(name, &st) == 0)
         return copy(name);
+	
+#if defined(__MINGW32__) || defined(_MSC_VER)
+    wchar_t wname[BSIZE_SP];
+    if (MultiByteToWideChar(CP_UTF8, 0, name, -1, wname, 2 * (int)strlen(name) + 1) == 0) {
+        fprintf(stderr, "UTF-8 to UTF-16 conversion failed with 0x%x\n", GetLastError());
+        fprintf(stderr, "%s could not be converted\n", name);
+        return NULL;
+    }
+    if (_waccess(wname, 0) == 0)
+        return copy(name);
+#endif	
 
     /* fail if this was an absolute filename or if there is no sourcepath var
      */
@@ -8604,3 +8635,82 @@ static void inp_rem_unused_models(struct nscope *root, struct card *deck)
     // disable unused .model lines, and free the models assoc lists
     rem_unused_xxx(root);
 }
+
+/* Markus Kuhn <http://www.cl.cam.ac.uk/~mgk25/> -- 2005-03-30
+ * License: Modified BSD (see http://www.cl.cam.ac.uk/~mgk25/short-license.html)
+ * The utf8_check() function scans the '\0'-terminated string starting
+ * at s. It returns a pointer to the first byte of the first malformed
+ * or overlong UTF-8 sequence found, or NULL if the string contains
+ * only correct UTF-8. It also spots UTF-8 sequences that could cause
+ * trouble if converted to UTF-16, namely surrogate characters
+ * (U+D800..U+DFFF) and non-Unicode positions (U+FFFE..U+FFFF).*/
+#ifndef EXT_ASC
+static unsigned char*
+utf8_check(unsigned char *s)
+{
+    while (*s) {
+        if (*s < 0x80)
+            /* 0xxxxxxx */
+            s++;
+        else if ((s[0] & 0xe0) == 0xc0) {
+            /* 110XXXXx 10xxxxxx */
+            if ((s[1] & 0xc0) != 0x80 ||
+                (s[0] & 0xfe) == 0xc0)                        /* overlong? */
+                return s;
+            else
+                s += 2;
+        }
+        else if ((s[0] & 0xf0) == 0xe0) {
+            /* 1110XXXX 10Xxxxxx 10xxxxxx */
+            if ((s[1] & 0xc0) != 0x80 ||
+                (s[2] & 0xc0) != 0x80 ||
+                (s[0] == 0xe0 && (s[1] & 0xe0) == 0x80) ||    /* overlong? */
+                (s[0] == 0xed && (s[1] & 0xe0) == 0xa0) ||    /* surrogate? */
+                (s[0] == 0xef && s[1] == 0xbf &&
+                (s[2] & 0xfe) == 0xbe))                      /* U+FFFE or U+FFFF? */
+                return s;
+            else
+                s += 3;
+        }
+        else if ((s[0] & 0xf8) == 0xf0) {
+            /* 11110XXX 10XXxxxx 10xxxxxx 10xxxxxx */
+            if ((s[1] & 0xc0) != 0x80 ||
+                (s[2] & 0xc0) != 0x80 ||
+                (s[3] & 0xc0) != 0x80 ||
+                (s[0] == 0xf0 && (s[1] & 0xf0) == 0x80) ||    /* overlong? */
+                (s[0] == 0xf4 && s[1] > 0x8f) || s[0] > 0xf4) /* > U+10FFFF? */
+                return s;
+            else
+                s += 4;
+        }
+        else
+            return s;
+    }
+
+    return NULL;
+}
+
+/* Scan through input deck and check for utf-8 syntax errors */
+static void
+utf8_syntax_check(struct card *deck)
+{
+    struct card *card;
+    unsigned char *s;
+
+    for (card = deck; card; card = card->nextcard) {
+
+        char *curr_line = card->line;
+
+        if (*curr_line == '*')
+            continue;
+
+        s = utf8_check((unsigned char*)curr_line);
+
+        if (s) {
+            fprintf(stderr, "Error: UTF-8 syntax error in line %d at %s\n", card->linenum_orig, s);
+            controlled_exit(1);
+        }
+    }
+}
+#endif
+