grpc1.45.2/include/grpc/support/string_util.h

/*
 *
 * 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.
 *
 */

#ifndef GRPC_SUPPORT_STRING_UTIL_H
#define GRPC_SUPPORT_STRING_UTIL_H

#include <grpc/support/port_platform.h>

#include <grpc/impl/codegen/gpr_types.h>

#ifdef __cplusplus
extern "C" {
#endif

/** String utility functions */

/** Returns a copy of src that can be passed to gpr_free().
   If allocation fails or if src is NULL, returns NULL. */
GPRAPI char* gpr_strdup(const char* src);

/** printf to a newly-allocated string.  The set of supported formats may vary
   between platforms.

   On success, returns the number of bytes printed (excluding the final '\0'),
   and *strp points to a string which must later be destroyed with gpr_free().

   On error, returns -1 and sets *strp to NULL. If the format string is bad,
   the result is undefined. */
GPRAPI int gpr_asprintf(char** strp, const char* format, ...)
    GPR_PRINT_FORMAT_CHECK(2, 3);

#ifdef __cplusplus
}
#endif

#endif /* GRPC_SUPPORT_STRING_UTIL_H */