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Diffstat (limited to 'common/xreadline.c')
-rw-r--r-- | common/xreadline.c | 116 |
1 files changed, 0 insertions, 116 deletions
diff --git a/common/xreadline.c b/common/xreadline.c deleted file mode 100644 index 85f0af02e..000000000 --- a/common/xreadline.c +++ /dev/null @@ -1,116 +0,0 @@ -/* xreadline.c - fgets replacement function - * Copyright (C) 1999, 2004 Free Software Foundation, Inc. - * - * This file is part of GnuPG. - * - * GnuPG 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 - * (at your option) any later version. - * - * GnuPG 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 - */ - -#include <config.h> -#include <stdio.h> -#include <stdlib.h> -#include <errno.h> - -#include "util.h" - - -/* Same as fgets() but if the provided buffer is too short a larger - one will be allocated. This is similar to getline. A line is - considered a byte stream ending in a LF. - - If MAX_LENGTH is not NULL, it shall point to a value with the - maximum allowed allocation. - - Returns the length of the line. EOF is indicated by a line of - length zero. A truncated line is indicated my setting the value at - MAX_LENGTH to 0. If the returned value is less then 0 not enough - memory was enable and ERRNO is set accordingly. - - If a line has been truncated, the file pointer is moved forward to - the end of the line so that the next read start with tghe next - line. Note that MAX_LENGTH must be re-initialzied in this case.. - - Note: The returned buffer is allocated with enough extra space to - append a CR,LF,Nul - */ -ssize_t -read_line (FILE *fp, - char **addr_of_buffer, size_t *length_of_buffer, - size_t *max_length) -{ - int c; - char *buffer = *addr_of_buffer; - size_t length = *length_of_buffer; - size_t nbytes = 0; - size_t maxlen = max_length? *max_length : 0; - char *p; - - if (!buffer) - { /* No buffer given - allocate a new one. */ - length = 256; - buffer = xtrymalloc (length); - *addr_of_buffer = buffer; - if (!buffer) - { - *length_of_buffer = 0; - if (max_length) - *max_length = 0; - return -1; - } - *length_of_buffer = length; - } - - length -= 3; /* Reserve 3 bytes for CR,LF,EOL. */ - p = buffer; - while ((c = getc (fp)) != EOF) - { - if (nbytes == length) - { /* Enlarge the buffer. */ - if (maxlen && length > maxlen) /* But not beyond our limit. */ - { - /* Skip the rest of the line. */ - while (c != '\n' && (c=getc (fp)) != EOF) - ; - *p++ = '\n'; /* Always append a LF (we reserved some space). */ - nbytes++; - if (max_length) - *max_length = 0; /* Indicate truncation. */ - break; /* the while loop. */ - } - length += 3; /* Adjust for the reserved bytes. */ - length += length < 1024? 256 : 1024; - *addr_of_buffer = xtryrealloc (buffer, length); - if (!*addr_of_buffer) - { - int save_errno = errno; - xfree (buffer); - *length_of_buffer = *max_length = 0; - errno = save_errno; - return -1; - } - buffer = *addr_of_buffer; - *length_of_buffer = length; - length -= 3; - p = buffer + nbytes; - } - *p++ = c; - nbytes++; - if (c == '\n') - break; - } - *p = 0; /* Make sure the line is a string. */ - - return nbytes; -} |