3 * Copyright 2015 gRPC authors.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
19 /* Windows code for gpr snprintf support. */
21 #include <grpc/support/port_platform.h>
23 #ifdef GPR_WINDOWS_STRING
29 #include <grpc/support/alloc.h>
30 #include <grpc/support/string_util.h>
32 #include "src/core/lib/gpr/string.h"
34 int gpr_asprintf(char** strp, const char* format, ...) {
39 /* Determine the length. */
40 va_start(args, format);
41 ret = _vscprintf(format, args);
48 /* Allocate a new buffer, with space for the NUL terminator. */
49 strp_buflen = (size_t)ret + 1;
50 if ((*strp = (char*)gpr_malloc(strp_buflen)) == NULL) {
51 /* This shouldn't happen, because gpr_malloc() calls abort(). */
55 /* Print to the buffer. */
56 va_start(args, format);
57 ret = vsnprintf_s(*strp, strp_buflen, _TRUNCATE, format, args);
59 if ((size_t)ret == strp_buflen - 1) {
63 /* This should never happen. */
69 #endif /* GPR_WINDOWS_STRING */