63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Utility routines.
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*
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* Copyright (C) 2005, 2006 Rob Landley <rob@landley.net>
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* Copyright (C) 2004 Erik Andersen <andersen@codepoet.org>
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* Copyright (C) 2001 Matt Krai
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "libbb.h"
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/* get_line_from_file() - This function reads an entire line from a text file,
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* up to a newline or NUL byte. It returns a malloc'ed char * which must be
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* stored and free'ed by the caller. If end is null '\n' isn't considered
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* and of line. If end isn't null, length of the chunk read is stored in it. */
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char *bb_get_chunk_from_file(FILE *file, int *end)
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{
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int ch;
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int idx = 0;
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char *linebuf = NULL;
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int linebufsz = 0;
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while ((ch = getc(file)) != EOF) {
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/* grow the line buffer as necessary */
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if (idx > linebufsz - 2) {
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linebuf = xrealloc(linebuf, linebufsz += 80);
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}
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linebuf[idx++] = (char)ch;
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if (!ch || (end && ch == '\n')) break;
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}
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if (end) *end = idx;
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if (linebuf) {
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if (ferror(file)) {
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free(linebuf);
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return NULL;
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}
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linebuf[idx] = 0;
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}
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return linebuf;
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}
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/* Get line, including trailing /n if any */
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char *bb_get_line_from_file(FILE *file)
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{
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int i;
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return bb_get_chunk_from_file(file, &i);
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}
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/* Get line. Remove trailing /n */
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char *bb_get_chomped_line_from_file(FILE *file)
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{
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int i;
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char *c=bb_get_chunk_from_file(file, &i);
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if(i) c[--i]=0;
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return c;
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}
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