X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/disorder/blobdiff_plain/460b9539a7c15580e41a71bbc0f47ae776238915..16b0fea8ae1a581d568dbee2efa2932aa4e6fcce:/lib/inputline.c

diff --git a/lib/inputline.c b/lib/inputline.c
index 891bade..aa8f685 100644
--- a/lib/inputline.c
+++ b/lib/inputline.c
@@ -1,50 +1,79 @@
 /*
  * This file is part of DisOrder.
- * Copyright (C) 2004 Richard Kettlewell
+ * Copyright (C) 2004, 2007-9, 2013 Richard Kettlewell
  *
- * This program is free software; you can redistribute it and/or modify
+ * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
  * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- * USA
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/** @file lib/inputline.c
+ * @brief Line input
  */
 
-#include <config.h>
-#include "types.h"
+#include "common.h"
 
-#include <stdio.h>
 #include <errno.h>
-#include <string.h>
 
 #include "log.h"
 #include "mem.h"
 #include "vector.h"
-#include "charset.h"
 #include "inputline.h"
+#include "sink.h"
 
+/** @brief Read a line from @p fp
+ * @param tag Used in error messages
+ * @param fp Stream to read from
+ * @param lp Where to store newly allocated string
+ * @param newline Newline character or @ref CRLF
+ * @return 0 on success, -1 on error or eof.
+ *
+ * The newline is not included in the string.  If the last line of a
+ * stream does not have a newline then that line is still returned.
+ *
+ * If @p newline is @ref CRLF then the line is terminated by CR LF,
+ * not by a single newline character.  The CRLF is still not included
+ * in the string in this case.
+ *
+ * @p *lp is only set if the return value was 0.
+ */
 int inputline(const char *tag, FILE *fp, char **lp, int newline) {
+  struct source *s = source_stdio(fp);
+  int rc = inputlines(tag, s, lp, newline);
+  xfree(s);
+  return rc;
+}
+
+int inputlines(const char *tag, struct source *s, char **lp, int newline) {
   struct dynstr d;
-  int ch;
+  int ch, err;
+  char errbuf[1024];
 
   dynstr_init(&d);
-  while((ch = getc(fp)),
-	(!ferror(fp) && !feof(fp) && ch != newline))
+  while((ch = source_getc(s)),
+	(!source_err(s) && !source_eof(s) && ch != newline)) {
     dynstr_append(&d, ch);
-  if(ferror(fp)) {
-    error(errno, "error reading %s", tag);
+    if(newline == CRLF && d.nvec >= 2
+       && d.vec[d.nvec - 2] == 0x0D && d.vec[d.nvec - 1] == 0x0A) {
+      d.nvec -= 2;
+      break;
+    }
+  }
+  if((err = source_err(s))) {
+    disorder_error(0, "error reading %s: %s", tag,
+                   format_error(s->eclass, err, errbuf, sizeof errbuf));
     return -1;
-  } else if(feof(fp)) {
+  } else if(source_eof(s)) {
     if(d.nvec != 0)
-      error(0, "error reading %s: unexpected EOF", tag);
+      disorder_error(0, "error reading %s: unexpected EOF", tag);
     return -1;
   }
   dynstr_terminate(&d);
@@ -58,4 +87,3 @@ c-basic-offset:2
 comment-column:40
 End:
 */
-/* arch-tag:2df12a23b06659ceea8a6019550a65b4 */