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/*
*
* Copyright 2015, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 COPYRIGHT
* OWNER OR CONTRIBUTORS 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 "src/core/lib/support/load_file.h"
#include <errno.h>
#include <string.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/string_util.h>
#include "src/core/lib/support/block_annotate.h"
#include "src/core/lib/support/string.h"
gpr_slice gpr_load_file(const char *filename, int add_null_terminator,
int *success) {
unsigned char *contents = NULL;
size_t contents_size = 0;
char *error_msg = NULL;
gpr_slice result = gpr_empty_slice();
FILE *file;
size_t bytes_read = 0;
GRPC_SCHEDULING_START_BLOCKING_REGION;
file = fopen(filename, "rb");
if (file == NULL) {
gpr_asprintf(&error_msg, "Could not open file %s (error = %s).", filename,
strerror(errno));
GPR_ASSERT(error_msg != NULL);
goto end;
}
fseek(file, 0, SEEK_END);
/* Converting to size_t on the assumption that it will not fail */
contents_size = (size_t)ftell(file);
fseek(file, 0, SEEK_SET);
contents = gpr_malloc(contents_size + (add_null_terminator ? 1 : 0));
bytes_read = fread(contents, 1, contents_size, file);
if (bytes_read < contents_size) {
GPR_ASSERT(ferror(file));
gpr_asprintf(&error_msg, "Error %s occured while reading file %s.",
strerror(errno), filename);
GPR_ASSERT(error_msg != NULL);
goto end;
}
if (success != NULL) *success = 1;
if (add_null_terminator) {
contents[contents_size++] = 0;
}
result = gpr_slice_new(contents, contents_size, gpr_free);
end:
if (error_msg != NULL) {
gpr_log(GPR_ERROR, "%s", error_msg);
gpr_free(error_msg);
if (success != NULL) *success = 0;
}
if (file != NULL) fclose(file);
GRPC_SCHEDULING_END_BLOCKING_REGION;
return result;
}
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