//
//  RQAppEventAnnotation.m
//  jiaPei
//
//  Created by 张嵘 on 2020/4/8.
//  Copyright © 2020 JCZ. All rights reserved.
//

#import "RQAppEventAnnotation.h"
#include <mach-o/getsect.h>
#include <mach-o/loader.h>
#include <mach-o/dyld.h>
#include <dlfcn.h>

static NSArray<NSString *>* FFReadConfiguration(char *section)
{
    NSMutableArray *configs = [NSMutableArray array];
    
    Dl_info info;
    dladdr(FFReadConfiguration, &info);
    
#ifndef __LP64__
    //        const struct mach_header *mhp = _dyld_get_image_header(0); // both works as below line
    const struct mach_header *mhp = (struct mach_header*)info.dli_fbase;
    unsigned long size = 0;
    uint32_t *memory = (uint32_t*)getsectiondata(mhp, "__DATA", section, & size);
#else /* defined(__LP64__) */
    const struct mach_header_64 *mhp = (struct mach_header_64*)info.dli_fbase;
    unsigned long size = 0;
    uint64_t *memory = (uint64_t*)getsectiondata(mhp, "__DATA", section, & size);
#endif /* defined(__LP64__) */
    
    for(int idx = 0; idx < size/sizeof(void*); ++idx){
        char *string = (char*)memory[idx];
        
        NSString *str = [NSString stringWithUTF8String:string];
        if(!str)continue;
        
        if(str) [configs addObject:str];
    }
    
    return configs;
    
}

@implementation RQAppEventAnnotation

+ (NSArray<NSString *> *)AnnotationModules
{
    static NSArray<NSString *> *mods = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        mods = FFReadConfiguration(RQAppEventModSectName);
    });
    return mods;
}

@end