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/*
*
* 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>
#include <limits.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)]) {
if ([value compare:[NSNumber numberWithInteger:INT_MAX]] == NSOrderedDescending ||
[value compare:[NSNumber numberWithInteger:INT_MIN]] == NSOrderedAscending) {
[NSException raise:NSInvalidArgumentException
format:@"Out of range for a value-typed channel argument: %@", value];
}
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 channel argument type: %@", [value class]];
}
}
return channelArgs;
}
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