Sha256: 51a28765f85da5c159bb85b0e0a92dde7e88de437a6a492d48c3ac2e4f182f9c
Contents?: true
Size: 1.82 KB
Versions: 45
Compression:
Stored size: 1.82 KB
Contents
//
//
// 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.
//
//
#include <grpc/support/port_platform.h>
#ifdef GPR_POSIX_STRING
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <grpc/support/alloc.h>
#include <grpc/support/string_util.h>
int gpr_asprintf(char** strp, const char* format, ...) {
va_list args;
int ret;
char buf[64];
size_t strp_buflen;
// Use a constant-sized buffer to determine the length.
va_start(args, format);
ret = vsnprintf(buf, sizeof(buf), format, args);
va_end(args);
if (ret < 0) {
*strp = nullptr;
return -1;
}
// Allocate a new buffer, with space for the NUL terminator.
strp_buflen = static_cast<size_t>(ret) + 1;
if ((*strp = static_cast<char*>(gpr_malloc(strp_buflen))) == nullptr) {
// This shouldn't happen, because gpr_malloc() calls abort().
return -1;
}
// Return early if we have all the bytes.
if (strp_buflen <= sizeof(buf)) {
memcpy(*strp, buf, strp_buflen);
return ret;
}
// Try again using the larger buffer.
va_start(args, format);
ret = vsnprintf(*strp, strp_buflen, format, args);
va_end(args);
if (static_cast<size_t>(ret) == strp_buflen - 1) {
return ret;
}
// This should never happen.
gpr_free(*strp);
*strp = nullptr;
return -1;
}
#endif // GPR_POSIX_STRING
Version data entries
45 entries across 45 versions & 1 rubygems