diff options
Diffstat (limited to 'Utilities/cmlibarchive/libarchive_fe/line_reader.c')
| -rw-r--r-- | Utilities/cmlibarchive/libarchive_fe/line_reader.c | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/Utilities/cmlibarchive/libarchive_fe/line_reader.c b/Utilities/cmlibarchive/libarchive_fe/line_reader.c deleted file mode 100644 index f7d2656..0000000 --- a/Utilities/cmlibarchive/libarchive_fe/line_reader.c +++ /dev/null @@ -1,171 +0,0 @@ -/*- - * Copyright (c) 2008 Tim Kientzle - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer - * in this position and unchanged. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include "lafe_platform.h" -__FBSDID("$FreeBSD$"); - -#include <errno.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#include "err.h" -#include "line_reader.h" - -#if defined(_WIN32) && !defined(__CYGWIN__) -#define strdup _strdup -#endif - -/* - * Read lines from file and do something with each one. If option_null - * is set, lines are terminated with zero bytes; otherwise, they're - * terminated with newlines. - * - * This uses a self-sizing buffer to handle arbitrarily-long lines. - */ -struct lafe_line_reader { - FILE *f; - char *buff, *buff_end, *line_start, *line_end, *p; - char *pathname; - size_t buff_length; - int nullSeparator; /* Lines separated by null, not CR/CRLF/etc. */ - int ret; -}; - -struct lafe_line_reader * -lafe_line_reader(const char *pathname, int nullSeparator) -{ - struct lafe_line_reader *lr; - - lr = calloc(1, sizeof(*lr)); - if (lr == NULL) - lafe_errc(1, ENOMEM, "Can't open %s", pathname); - - lr->nullSeparator = nullSeparator; - lr->pathname = strdup(pathname); - - if (strcmp(pathname, "-") == 0) - lr->f = stdin; - else - lr->f = fopen(pathname, "r"); - if (lr->f == NULL) - lafe_errc(1, errno, "Couldn't open %s", pathname); - lr->buff_length = 8192; - lr->buff = malloc(lr->buff_length); - if (lr->buff == NULL) - lafe_errc(1, ENOMEM, "Can't read %s", pathname); - lr->line_start = lr->line_end = lr->buff_end = lr->buff; - - return (lr); -} - -const char * -lafe_line_reader_next(struct lafe_line_reader *lr) -{ - size_t bytes_wanted, bytes_read, new_buff_size; - char *line_start, *p; - - for (;;) { - /* If there's a line in the buffer, return it immediately. */ - while (lr->line_end < lr->buff_end) { - if (lr->nullSeparator) { - if (*lr->line_end == '\0') { - line_start = lr->line_start; - lr->line_start = lr->line_end + 1; - lr->line_end = lr->line_start; - return (line_start); - } - } else if (*lr->line_end == '\x0a' || *lr->line_end == '\x0d') { - *lr->line_end = '\0'; - line_start = lr->line_start; - lr->line_start = lr->line_end + 1; - lr->line_end = lr->line_start; - if (line_start[0] != '\0') - return (line_start); - } - lr->line_end++; - } - - /* If we're at end-of-file, process the final data. */ - if (lr->f == NULL) { - /* If there's more text, return one last line. */ - if (lr->line_end > lr->line_start) { - *lr->line_end = '\0'; - line_start = lr->line_start; - lr->line_start = lr->line_end + 1; - lr->line_end = lr->line_start; - return (line_start); - } - /* Otherwise, we're done. */ - return (NULL); - } - - /* Buffer only has part of a line. */ - if (lr->line_start > lr->buff) { - /* Move a leftover fractional line to the beginning. */ - memmove(lr->buff, lr->line_start, - lr->buff_end - lr->line_start); - lr->buff_end -= lr->line_start - lr->buff; - lr->line_end -= lr->line_start - lr->buff; - lr->line_start = lr->buff; - } else { - /* Line is too big; enlarge the buffer. */ - new_buff_size = lr->buff_length * 2; - if (new_buff_size <= lr->buff_length) - lafe_errc(1, ENOMEM, - "Line too long in %s", lr->pathname); - lr->buff_length = new_buff_size; - p = realloc(lr->buff, new_buff_size); - if (p == NULL) - lafe_errc(1, ENOMEM, - "Line too long in %s", lr->pathname); - lr->buff_end = p + (lr->buff_end - lr->buff); - lr->line_end = p + (lr->line_end - lr->buff); - lr->line_start = lr->buff = p; - } - - /* Get some more data into the buffer. */ - bytes_wanted = lr->buff + lr->buff_length - lr->buff_end; - bytes_read = fread(lr->buff_end, 1, bytes_wanted, lr->f); - lr->buff_end += bytes_read; - - if (ferror(lr->f)) - lafe_errc(1, errno, "Can't read %s", lr->pathname); - if (feof(lr->f)) { - if (lr->f != stdin) - fclose(lr->f); - lr->f = NULL; - } - } -} - -void -lafe_line_reader_free(struct lafe_line_reader *lr) -{ - free(lr->buff); - free(lr->pathname); - free(lr); -} |