ad8bd8e313
The new added API can load file content into a data buffer, which can be used to read configuration file as well as JSON file, and we can add WRITE API in future which can be used to implement the persistent reservation feature. Change-Id: I9aaca7571648e1ab6dbfdd7cfd6ca34083cbeec2 Signed-off-by: Changpeng Liu <changpeng.liu@intel.com> Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/453498 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright (c) Intel Corporation.
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* All rights reserved.
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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
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* are met:
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*
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* * 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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* * 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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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* 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
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* 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
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "spdk/file.h"
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void *
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spdk_posix_file_load(FILE *file, size_t *size)
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{
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void *newbuf, *buf = NULL;
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size_t rc, buf_size, cur_size = 0;
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*size = 0;
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buf_size = 128 * 1024;
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while (buf_size <= 1024 * 1024 * 1024) {
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newbuf = realloc(buf, buf_size);
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if (newbuf == NULL) {
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free(buf);
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return NULL;
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}
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buf = newbuf;
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rc = fread(buf + cur_size, 1, buf_size - cur_size, file);
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cur_size += rc;
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if (feof(file)) {
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*size = cur_size;
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return buf;
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}
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if (ferror(file)) {
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free(buf);
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return NULL;
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}
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buf_size *= 2;
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}
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free(buf);
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return NULL;
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}
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