Fix reading text from stdin

util/options.cc

@@ -509,40 +509,64 @@ font_options_t::get_font (void) const
 const char *
 text_options_t::get_line (unsigned int *len)
 {
-  if (!text) {
+  if (text) {
+    if (text_len == (unsigned int) -1)
+      text_len = strlen (text);
+
+    if (!text_len) {
+      *len = 0;
+      return NULL;
+    }
+
+    const char *ret = text;
+    const char *p = (const char *) memchr (text, '\n', text_len);
+    unsigned int ret_len;
+    if (!p) {
+      ret_len = text_len;
+      text += ret_len;
+      text_len = 0;
+    } else {
+      ret_len = p - ret;
+      text += ret_len + 1;
+      text_len -= ret_len + 1;
+    }
+
+    *len = ret_len;
+    return ret;
+  }
+
+  if (!fp) {
     if (!text_file)
       fail (TRUE, "At least one of text or text-file must be set");
 
-    GMappedFile *mf = g_mapped_file_new (text_file, FALSE, NULL);
-    if (!mf)
-      fail (FALSE, "Failed opening text file `%s'", g_filename_display_name (text_file));
-    text = g_mapped_file_get_contents (mf);
-    text_len = g_mapped_file_get_length (mf);
+    if (0 != strcmp (text_file, "-"))
+      fp = fopen (text_file, "r");
+    else
+      fp = stdin;
+
+    if (!fp)
+      fail (FALSE, "Failed opening text file `%s': %s",
+	    text_file, strerror (errno));
+
+    gs = g_string_new (NULL);
   }
 
-  if (text_len == (unsigned int) -1)
-    text_len = strlen (text);
-
-  if (!text_len) {
-    *len = 0;
-    return NULL;
+  g_string_set_size (gs, 0);
+  char buf[BUFSIZ];
+  while (fgets (buf, sizeof (buf), fp)) {
+    unsigned int bytes = strlen (buf);
+    if (buf[bytes - 1] == '\n') {
+      bytes--;
+      g_string_append_len (gs, buf, bytes);
+      break;
+    }
+      g_string_append_len (gs, buf, bytes);
   }
-
-  const char *ret = text;
-  const char *p = (const char *) memchr (text, '\n', text_len);
-  unsigned int ret_len;
-  if (!p) {
-    ret_len = text_len;
-    text += ret_len;
-    text_len = 0;
-  } else {
-    ret_len = p - ret;
-    text += ret_len + 1;
-    text_len -= ret_len + 1;
-  }
-
-  *len = ret_len;
-  return ret;
+  if (ferror (fp))
+    fail (FALSE, "Failed reading text: %s",
+	  strerror (errno));
+  *len = gs->len;
+  return !*len && feof (fp) ? NULL : gs->str;
 }
 
 

util/options.hh

@@ -178,14 +178,17 @@ struct text_options_t : option_group_t
     text = NULL;
     text_file = NULL;
 
-    file = NULL;
+    fp = NULL;
+    gs = NULL;
     text_len = (unsigned int) -1;
 
     add_options (parser);
   }
   ~text_options_t (void) {
-    if (file)
-      g_mapped_file_unref (file);
+    if (gs)
+      g_string_free (gs, TRUE);
+    if (fp)
+      fclose (fp);
   }
 
   void add_options (option_parser_t *parser);
@@ -204,8 +207,9 @@ struct text_options_t : option_group_t
   const char *text_file;
 
   private:
-  mutable GMappedFile *file;
-  mutable unsigned int text_len;
+  FILE *fp;
+  GString *gs;
+  unsigned int text_len;
 };
 
 struct output_options_t : option_group_t
@@ -219,7 +223,7 @@ struct output_options_t : option_group_t
     add_options (parser);
   }
   ~output_options_t (void) {
-    if (fp && fp != stdout)
+    if (fp)
       fclose (fp);
   }
 

util/view-cairo.cc

@@ -96,7 +96,7 @@ view_cairo_t::consume_line (hb_buffer_t  *buffer,
   l.glyphs = cairo_glyph_allocate (l.num_glyphs + 1);
   l.utf8 = g_strndup (text, text_len);
   l.utf8_len = text_len;
-  l.num_clusters = 1;
+  l.num_clusters = l.num_glyphs ? 1 : 0;
   for (unsigned int i = 1; i < l.num_glyphs; i++)
     if (hb_glyph[i].cluster != hb_glyph[i-1].cluster)
       l.num_clusters++;
@@ -129,8 +129,9 @@ view_cairo_t::consume_line (hb_buffer_t  *buffer,
   memset ((void *) l.clusters, 0, l.num_clusters * sizeof (l.clusters[0]));
   bool backward = HB_DIRECTION_IS_BACKWARD (hb_buffer_get_direction (buffer));
   l.cluster_flags = backward ? CAIRO_TEXT_CLUSTER_FLAG_BACKWARD : (cairo_text_cluster_flags_t) 0;
-  g_assert (l.num_glyphs);
   unsigned int cluster = 0;
+  if (!l.num_glyphs)
+    goto done;
   l.clusters[cluster].num_glyphs++;
   if (backward) {
     for (i = l.num_glyphs - 2; i >= 0; i--) {
@@ -154,6 +155,7 @@ view_cairo_t::consume_line (hb_buffer_t  *buffer,
     l.clusters[cluster].num_bytes += text_len - hb_glyph[i - 1].cluster;
   }
 
+done:
   g_array_append_val (lines, l);
 }