X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Flanguage%2Flexer%2Flexer.c;h=5c61c8def41fd2780dfda3c6aecff68f449c9190;hb=f15768f0d46bae8b5e06d84558a0f2397d6fdfd7;hp=ea81f19559926a37fc47e69efe7c464a82384909;hpb=7a0693849ac589de8fc975a6ebb4602d3ef58732;p=pspp

diff --git a/src/language/lexer/lexer.c b/src/language/lexer/lexer.c
index ea81f19559..5c61c8def4 100644
--- a/src/language/lexer/lexer.c
+++ b/src/language/lexer/lexer.c
@@ -604,9 +604,16 @@ lex_force_match (struct lexer *lexer, enum token_type type)
     }
   else
     {
-      char *s = xasprintf ("`%s'", token_type_to_string (type));
-      lex_error_expecting (lexer, s, NULL_SENTINEL);
-      free (s);
+      const char *type_string = token_type_to_string (type);
+      if (type_string)
+	{
+	  char *s = xasprintf ("`%s'", type_string);
+	  lex_error_expecting (lexer, s, NULL_SENTINEL);
+	  free (s);
+	}
+      else
+	lex_error_expecting (lexer, token_type_to_name (type), NULL_SENTINEL);
+
       return false;
     }
 }
@@ -1174,19 +1181,33 @@ lex_source_read__ (struct lex_source *src)
 {
   do
     {
-      size_t head_ofs;
-      size_t space;
-      size_t n;
-
       lex_source_expand__ (src);
 
-      head_ofs = src->head - src->tail;
-      space = src->allocated - head_ofs;
-      n = src->reader->class->read (src->reader, &src->buffer[head_ofs],
-                                    space,
-                                    segmenter_get_prompt (&src->segmenter));
+      size_t head_ofs = src->head - src->tail;
+      size_t space = src->allocated - head_ofs;
+      enum prompt_style prompt = segmenter_get_prompt (&src->segmenter);
+      size_t n = src->reader->class->read (src->reader, &src->buffer[head_ofs],
+                                           space, prompt);
       assert (n <= space);
 
+      for (char *p = &src->buffer[head_ofs]; p < &src->buffer[head_ofs + n];
+           p++)
+        if (*p == '\0')
+          {
+            struct msg m;
+            m.category = MSG_C_SYNTAX;
+            m.severity = MSG_S_ERROR;
+            m.file_name = src->reader->file_name;
+            m.first_line = 0;
+            m.last_line = 0;
+            m.first_column = 0;
+            m.last_column = 0;
+            m.text = xstrdup ("Bad character U+0000 in input.");
+            msg_emit (&m);
+
+            *p = ' ';
+          }
+
       if (n == 0)
         {
           /* End of input.