diff options
Diffstat (limited to 'src/objective-c/GRPCClient/private/ChannelArgsUtil.m')
-rw-r--r-- | src/objective-c/GRPCClient/private/ChannelArgsUtil.m | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/src/objective-c/GRPCClient/private/ChannelArgsUtil.m b/src/objective-c/GRPCClient/private/ChannelArgsUtil.m new file mode 100644 index 0000000000..8ebf3a2659 --- /dev/null +++ b/src/objective-c/GRPCClient/private/ChannelArgsUtil.m @@ -0,0 +1,95 @@ +/* + * + * Copyright 2018 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. + * + */ + +#import "ChannelArgsUtil.h" + +#include <grpc/support/alloc.h> +#include <grpc/support/string_util.h> + +static void *copy_pointer_arg(void *p) { + // Add ref count to the object when making copy + id obj = (__bridge id)p; + return (__bridge_retained void *)obj; +} + +static void destroy_pointer_arg(void *p) { + // Decrease ref count to the object when destroying + CFRelease((CFTreeRef)p); +} + +static int cmp_pointer_arg(void *p, void *q) { return p == q; } + +static const grpc_arg_pointer_vtable objc_arg_vtable = {copy_pointer_arg, destroy_pointer_arg, + cmp_pointer_arg}; + +void FreeChannelArgs(grpc_channel_args *channel_args) { + for (size_t i = 0; i < channel_args->num_args; ++i) { + grpc_arg *arg = &channel_args->args[i]; + gpr_free(arg->key); + if (arg->type == GRPC_ARG_STRING) { + gpr_free(arg->value.string); + } + } + gpr_free(channel_args->args); + gpr_free(channel_args); +} + +/** + * Allocates a @c grpc_channel_args and populates it with the options specified in the + * @c dictionary. Keys must be @c NSString. If the value responds to @c @selector(UTF8String) then + * it will be mapped to @c GRPC_ARG_STRING. If not, it will be mapped to @c GRPC_ARG_INTEGER if the + * value responds to @c @selector(intValue). Otherwise, an exception will be raised. The caller of + * this function is responsible for calling @c freeChannelArgs on a non-NULL returned value. + */ +grpc_channel_args *BuildChannelArgs(NSDictionary *dictionary) { + if (!dictionary) { + return NULL; + } + + NSArray *keys = [dictionary allKeys]; + NSUInteger argCount = [keys count]; + + grpc_channel_args *channelArgs = gpr_malloc(sizeof(grpc_channel_args)); + channelArgs->num_args = argCount; + channelArgs->args = gpr_malloc(argCount * sizeof(grpc_arg)); + + // TODO(kriswuollett) Check that keys adhere to GRPC core library requirements + + for (NSUInteger i = 0; i < argCount; ++i) { + grpc_arg *arg = &channelArgs->args[i]; + arg->key = gpr_strdup([keys[i] UTF8String]); + + id value = dictionary[keys[i]]; + if ([value respondsToSelector:@selector(UTF8String)]) { + arg->type = GRPC_ARG_STRING; + arg->value.string = gpr_strdup([value UTF8String]); + } else if ([value respondsToSelector:@selector(intValue)]) { + arg->type = GRPC_ARG_INTEGER; + arg->value.integer = [value intValue]; + } else if (value != nil) { + arg->type = GRPC_ARG_POINTER; + arg->value.pointer.p = (__bridge_retained void *)value; + arg->value.pointer.vtable = &objc_arg_vtable; + } else { + [NSException raise:NSInvalidArgumentException + format:@"Invalid value type: %@", [value class]]; + } + } + + return channelArgs; +} |