105 lines
2.9 KiB
C
105 lines
2.9 KiB
C
/**
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* @file write_file.h
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* @author Ambroz Bizjak <ambrop7@gmail.com>
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*
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* @section LICENSE
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*
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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 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 the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef BADVPN_WRITE_FILE_H
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#define BADVPN_WRITE_FILE_H
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#include <stddef.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <misc/debug.h>
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#include <misc/cstring.h>
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static int write_file (const char *file, const uint8_t *data, size_t len)
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{
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FILE *f = fopen(file, "w");
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if (!f) {
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goto fail0;
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}
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while (len > 0) {
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size_t res = fwrite(data, 1, len, f);
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if (res == 0) {
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goto fail1;
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}
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ASSERT(res <= len)
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data += res;
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len -= res;
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}
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if (fclose(f) != 0) {
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return 0;
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}
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return 1;
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fail1:
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fclose(f);
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fail0:
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return 0;
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}
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static int write_file_cstring (const char *file, b_cstring cstr, size_t offset, size_t length)
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{
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b_cstring_assert_range(cstr, offset, length);
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FILE *f = fopen(file, "w");
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if (!f) {
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goto fail0;
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}
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B_CSTRING_LOOP_RANGE(cstr, offset, length, pos, chunk_data, chunk_length, {
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size_t chunk_pos = 0;
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while (chunk_pos < chunk_length) {
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size_t res = fwrite(chunk_data + chunk_pos, 1, chunk_length - chunk_pos, f);
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if (res == 0) {
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goto fail1;
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}
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ASSERT(res <= chunk_length - chunk_pos)
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chunk_pos += res;
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}
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})
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if (fclose(f) != 0) {
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return 0;
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}
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return 1;
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fail1:
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fclose(f);
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fail0:
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return 0;
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}
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#endif
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