1 files changed, 54 insertions, 0 deletions
diff --git a/lib/linebuffer.h b/lib/linebuffer.h
new file mode 100644
index 0000000..07d45ca
--- /dev/null
+++ b/lib/linebuffer.h
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+/* linebuffer.h -- declarations for reading arbitrarily long lines
+
+   Copyright (C) 1986, 1991, 1998-1999, 2002-2003, 2007, 2009-2022 Free
+   Software Foundation, Inc.
+
+   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 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.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#if !defined LINEBUFFER_H
+# define LINEBUFFER_H
+
+# include "idx.h"
+# include <stdio.h>
+
+/* A 'struct linebuffer' holds a line of text. */
+
+struct linebuffer
+{
+  idx_t size;                  /* Allocated. */
+  idx_t length;                /* Used. */
+  char *buffer;
+};
+
+/* Initialize linebuffer LINEBUFFER for use. */
+void initbuffer (struct linebuffer *linebuffer);
+
+/* Read an arbitrarily long line of text from STREAM into LINEBUFFER.
+   Consider lines to be terminated by DELIMITER.
+   Keep the delimiter; append DELIMITER if we reach EOF and it wasn't
+   the last character in the file.  Do not NUL-terminate.
+   Return LINEBUFFER, except at end of file return NULL.  */
+struct linebuffer *readlinebuffer_delim (struct linebuffer *linebuffer,
+                                         FILE *stream, char delimiter);
+
+/* Read an arbitrarily long line of text from STREAM into LINEBUFFER.
+   Keep the newline; append a newline if it's the last line of a file
+   that ends in a non-newline character.  Do not NUL-terminate.
+   Return LINEBUFFER, except at end of file return NULL.  */
+struct linebuffer *readlinebuffer (struct linebuffer *linebuffer, FILE *stream);
+
+/* Free linebuffer LINEBUFFER and its data, all allocated with malloc. */
+void freebuffer (struct linebuffer *);
+
+#endif /* LINEBUFFER_H */