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//~ Libraries
#include "../shared_libraries/lr/lr.h"
PUSH_WARNINGS
#define STB_SPRINTF_IMPLEMENTATION
#include "libs/stb_sprintf.h"
POP_WARNINGS
#include "libs/listing_065.cpp"
//~ Standard library
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/mman.h>
#include "haversine_random.h"
//~ Macro's
#define MemoryCopy memcpy
//~ Types
#include "generated/types.h"
//~ Helpers
void WriteMemoryTofile(umm Size, void *Memory, umm PairCount, char *Name, char *Extension)
{
char FileName[256] = {};
stbsp_sprintf(FileName, "data_%lu_%s.%s", PairCount, Name, Extension);
int File = open(FileName, O_RDWR|O_CREAT|O_TRUNC, 0600);
if(File != -1)
{
smm BytesWritten = write(File, Memory, Size);
Assert(BytesWritten == Size);
}
else
{
}
}
//~ Main
int main(int ArgsCount, char *Args[], char *Env[])
{
// 1. haversine_generator [uniform/cluster] [random seed] [number of pairs to generate]
if(ArgsCount >= 4)
{
u32 Method = 0;
u64 RandomSeed = 0;;
u64 PairCount = 0;
char *MethodName = Args[1];
char *SeedString = Args[2];
u64 ClusterCountLeft = U64Max;
f64 MaxAllowedX = 180.0;
f64 MaxAllowedY = 90.0;
f64 XCenter = 0.0;
f64 YCenter = 0.0;
f64 XRadius = MaxAllowedX;
f64 YRadius = MaxAllowedY;
if(!strcmp(MethodName, "cluster"))
{
ClusterCountLeft = 0;
}
else if(strcmp(MethodName, "uniform"))
{
MethodName = "uniform";
printf("Warning: Unknown method '%s', uniform used.\n", MethodName);
}
RandomSeed = atoll(Args[2]);
PairCount = atoll(Args[3]);
u64 MaxPairCount = (1LL << 34);
if(PairCount < MaxPairCount)
{
umm JsonMemorySize = Gigabytes(4);
u8 *JsonMemory = (u8 *)mmap(0, JsonMemorySize, PROT_READ|PROT_WRITE, MAP_ANONYMOUS|MAP_SHARED, -1, 0);
u8 *JsonOut = JsonMemory;
umm BinMemorySize = Gigabytes(4);
u8 *BinMemory = (u8 *)mmap(0, BinMemorySize, PROT_READ|PROT_WRITE, MAP_ANONYMOUS|MAP_SHARED, -1, 0);
u8 *BinOut = BinMemory;
JsonOut += stbsp_sprintf((char *)JsonOut,
"{\n"
" \"pairs\":\n"
" [\n");
pcg64_random_t Series = {};
pcg64_srandom_r(&Series, RandomSeed, RandomSeed);
u64 ClusterCountMax = 1 + (PairCount / 64);
f64 SumCoefficient = 1.0/(f64)PairCount;
f64 Sum = 0;
for(u32 PairIndex = 0;
PairIndex < PairCount;
PairIndex += 1)
{
if(ClusterCountLeft-- == 0)
{
ClusterCountLeft = ClusterCountMax;
XCenter = RandomBetween(&Series, -MaxAllowedX, MaxAllowedX);
YCenter = RandomBetween(&Series, -MaxAllowedY, MaxAllowedY);
XRadius = RandomBetween(&Series, 0, MaxAllowedX);
YRadius = RandomBetween(&Series, 0, MaxAllowedY);
}
f64 X0 = RandomDegree(&Series, XCenter, XRadius, MaxAllowedX);
f64 Y0 = RandomDegree(&Series, YCenter, YRadius, MaxAllowedY);
f64 X1 = RandomDegree(&Series, XCenter, XRadius, MaxAllowedX);
f64 Y1 = RandomDegree(&Series, YCenter, YRadius, MaxAllowedY);
f64 EarthRadius = 6372.8;
f64 Distance = ReferenceHaversine(X0, Y0, X1, Y1, EarthRadius);
Sum += SumCoefficient*Distance;
*(f64 *)BinOut = Distance;
BinOut += sizeof(Distance);
const char *Separator = (PairIndex == PairCount - 1) ? "\n" : ",\n";
JsonOut += stbsp_sprintf((char *)JsonOut,
" { \"x0\": %.16f, \"y0\": %.16f, \"x1\": %.16f, \"y1\": %.16f }%s",
X0, Y0, X1, Y1, Separator);
}
*(f64 *)BinOut = Sum;
BinOut += sizeof(Sum);
printf("Method: %s\n"
"Random seed: %lu\n"
"Pairs count: %lu\n"
, MethodName, RandomSeed, PairCount);
printf("Average sum: %.16f\n", Sum);
JsonOut += stbsp_sprintf((char *)JsonOut,
" ]\n"
"}\n");
WriteMemoryTofile(JsonOut - JsonMemory, JsonMemory, PairCount, "flex", "json");
WriteMemoryTofile(BinOut - BinMemory, BinMemory, PairCount, "haveranswer", "f64");
}
else
{
printf("Massive files unsupported. Number of pairs must be less than %lu.\n", MaxPairCount);
}
}
else
{
printf("Usage: %s [uniform/cluster] [random seed] [number of pairs to generate]\n",
Args[0]);
}
return 0;
}
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