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/*
*
* Copyright 2015 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
/* Windows code for gpr snprintf support. */
#include <grpc/support/port_platform.h>
#ifdef GPR_WINDOWS_STRING
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <grpc/support/alloc.h>
#include <grpc/support/string_util.h>
#include "src/core/lib/support/string.h"
int gpr_asprintf(char** strp, const char* format, ...) {
va_list args;
int ret;
size_t strp_buflen;
/* Determine the length. */
va_start(args, format);
ret = _vscprintf(format, args);
va_end(args);
if (ret < 0) {
*strp = NULL;
return -1;
}
/* Allocate a new buffer, with space for the NUL terminator. */
strp_buflen = (size_t)ret + 1;
if ((*strp = (char*)gpr_malloc(strp_buflen)) == NULL) {
/* This shouldn't happen, because gpr_malloc() calls abort(). */
return -1;
}
/* Print to the buffer. */
va_start(args, format);
ret = vsnprintf_s(*strp, strp_buflen, _TRUNCATE, format, args);
va_end(args);
if ((size_t)ret == strp_buflen - 1) {
return ret;
}
/* This should never happen. */
gpr_free(*strp);
*strp = NULL;
return -1;
}
#endif /* GPR_WINDOWS_STRING */
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