mirror of
https://invent.kde.org/graphics/okular
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5021c85485
HEAD branch when he updated the kpathsea sources (sorry for the rude word but it took me an hour) svn path=/trunk/kdegraphics/kdvi/; revision=33507
72 lines
2 KiB
C
72 lines
2 KiB
C
/* line.c: return the next line from a file, or NULL.
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Copyright (C) 1992, 93, 95, 96 Free Software Foundation, Inc.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include <kpathsea/config.h>
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#include <kpathsea/line.h>
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/* Allocate in increments of this size. */
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#define BLOCK_SIZE 75
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char *
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read_line (f)
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FILE *f;
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{
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int c;
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unsigned limit = BLOCK_SIZE;
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unsigned loc = 0;
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char *line = xmalloc (limit);
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while ((c = getc (f)) != EOF && c != '\n' && c != '\r')
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{
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line[loc] = c;
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loc++;
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/* By testing after the assignment, we guarantee that we'll always
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have space for the null we append below. We know we always
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have room for the first char, since we start with BLOCK_SIZE. */
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if (loc == limit)
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{
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limit += BLOCK_SIZE;
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line = xrealloc (line, limit);
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}
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}
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/* If we read anything, return it. This can't represent a last
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``line'' which doesn't end in a newline, but so what. */
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if (c != EOF)
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{
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/* Terminate the string. We can't represent nulls in the file,
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either. Again, it doesn't matter. */
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line[loc] = 0;
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/* Absorb LF of a CRLF pair. */
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if (c == '\r') {
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c = getc (f);
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if (c != '\n')
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ungetc (c, f);
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}
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}
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else /* At end of file. */
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{
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free (line);
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line = NULL;
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}
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return line;
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}
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