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135 lines
3.5 KiB
C
135 lines
3.5 KiB
C
/*
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zip_io_util.c -- I/O helper functions
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Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner
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This file is part of libzip, a library to manipulate ZIP archives.
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The authors can be contacted at <libzip@nih.at>
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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3. The names of the authors may not be used to endorse or promote
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products derived from this software without specific prior
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written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
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OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "zipint.h"
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int
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_zip_read(zip_source_t *src, zip_uint8_t *b, zip_uint64_t length, zip_error_t *error) {
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zip_int64_t n;
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if (length > ZIP_INT64_MAX) {
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zip_error_set(error, ZIP_ER_INTERNAL, 0);
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return -1;
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}
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if ((n = zip_source_read(src, b, length)) < 0) {
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_zip_error_set_from_source(error, src);
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return -1;
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}
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if (n < (zip_int64_t)length) {
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zip_error_set(error, ZIP_ER_EOF, 0);
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return -1;
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}
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return 0;
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}
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zip_uint8_t *
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_zip_read_data(zip_buffer_t *buffer, zip_source_t *src, size_t length, bool nulp, zip_error_t *error) {
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zip_uint8_t *r;
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if (length == 0 && !nulp) {
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return NULL;
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}
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r = (zip_uint8_t *)malloc(length + (nulp ? 1 : 0));
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if (!r) {
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zip_error_set(error, ZIP_ER_MEMORY, 0);
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return NULL;
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}
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if (buffer) {
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zip_uint8_t *data = _zip_buffer_get(buffer, length);
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if (data == NULL) {
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zip_error_set(error, ZIP_ER_MEMORY, 0);
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free(r);
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return NULL;
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}
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memcpy(r, data, length);
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}
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else {
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if (_zip_read(src, r, length, error) < 0) {
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free(r);
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return NULL;
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}
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}
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if (nulp) {
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zip_uint8_t *o;
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/* replace any in-string NUL characters with spaces */
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r[length] = 0;
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for (o = r; o < r + length; o++)
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if (*o == '\0')
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*o = ' ';
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}
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return r;
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}
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zip_string_t *
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_zip_read_string(zip_buffer_t *buffer, zip_source_t *src, zip_uint16_t len, bool nulp, zip_error_t *error) {
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zip_uint8_t *raw;
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zip_string_t *s;
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if ((raw = _zip_read_data(buffer, src, len, nulp, error)) == NULL)
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return NULL;
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s = _zip_string_new(raw, len, ZIP_FL_ENC_GUESS, error);
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free(raw);
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return s;
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}
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int
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_zip_write(zip_t *za, const void *data, zip_uint64_t length) {
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zip_int64_t n;
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if ((n = zip_source_write(za->src, data, length)) < 0) {
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_zip_error_set_from_source(&za->error, za->src);
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return -1;
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}
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if ((zip_uint64_t)n != length) {
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zip_error_set(&za->error, ZIP_ER_WRITE, EINTR);
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return -1;
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}
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return 0;
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}
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