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#include "table.h"
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
uint64_t i_len(lua_State* L, int pos){
uint64_t i = 0;
lua_pushnil(L);
for(;lua_next(L,pos) != 0;){
i += 1;
lua_pop(L,1);
}
return i;
}
int l_len(lua_State* L) {
luaL_checktype(L, 1, LUA_TTABLE);
lua_pushnumber(L,i_len(L,1));
return 1;
}
int l_reverse(lua_State* L) {
luaL_checktype(L, 1, LUA_TTABLE);
size_t len = lua_objlen(L,1);
lua_newtable(L);
for(size_t i = 0; i <= len - 1; i++){
lua_pushnumber(L,len - i - 1);
lua_gettable(L,1);
lua_pushnumber(L, i+1);
lua_pushvalue(L, -2);
lua_settable(L,2);
}
lua_pushvalue(L, 2);
return 1;
}
int l_greatest(lua_State* L) {
luaL_checktype(L, 1, LUA_TTABLE);
size_t len = lua_objlen(L,1);
int touched = 0;
double cur = 0;
for(size_t i = 0; i <= len-1; i++){
lua_pushinteger(L,i+1);
lua_gettable(L,1);
double t = luaL_checknumber(L, -1);
if(!touched || t > cur) cur = t;
touched = 1;
lua_pop(L,1);
}
lua_pushnumber(L, cur);
return 1;
}
int l_least(lua_State* L) {
luaL_checktype(L, 1, LUA_TTABLE);
size_t len = lua_objlen(L,1);
int touched = 0;
double cur = 0;
for(size_t i = 0; i <= len-1; i++){
lua_pushinteger(L,i+1);
lua_gettable(L,1);
double t = luaL_checknumber(L, -1);
if(!touched || t < cur) cur = t;
touched = 1;
lua_pop(L,1);
}
lua_pushnumber(L, cur);
return 1;
}
void i_shuffle(double* arr, size_t len){
for(size_t i = 0; i < len; i++){
int i2 = rand()%len;
int d = rand()%len;
i_swap(arr[i2], arr[d]);
}
}
int l_shuffle(lua_State* L) {
luaL_checktype(L, 1, LUA_TTABLE);
size_t len = lua_objlen(L,1);
double* nums = malloc(sizeof * nums * len);
for(int i = 0; i <= len-1; i++){
lua_pushinteger(L,i+1);
lua_gettable(L,1);
nums[i] = luaL_checknumber(L, -1);
lua_pop(L,1);
}
i_shuffle(nums, len);
lua_newtable(L);
for(size_t i = 0; i != len; i++){
lua_pushnumber(L,i+1);
lua_pushnumber(L,nums[i]);
lua_settable(L, -3);
}
free(nums);
return 1;
}
int l_sum(lua_State* L) {
luaL_checktype(L, 1, LUA_TTABLE);
size_t len = lua_objlen(L,1);
double s = 0;
for(int i = 0; i <= len-1; i++){
lua_pushinteger(L,i+1);
lua_gettable(L,1);
s += luaL_checknumber(L, -1);
lua_pop(L,1);
}
lua_pushnumber(L, s);
return 1;
}
int l_indexof(lua_State* L) {
int argc = lua_gettop(L);
luaL_checktype(L, 1, LUA_TTABLE);
size_t len = lua_objlen(L,1);
//get optional 3rd argument, if its >0 set it to 0
size_t start = argc == 3 ? luaL_checknumber(L,3) : 0;
start = start > 0 ? start : start;
double cur = 0;
for(size_t i = 0; i <= len-1; i++){
lua_pushinteger(L,i+1);
lua_gettable(L,1);
if(lua_rawequal(L, -1, 2)){
lua_pushnumber(L, i);
return 1;
}
lua_pop(L,1);
}
lua_pushnumber(L, -1);
return 1;
}
int l_sindexof(lua_State* L) {
int argc = lua_gettop(L);
double target = luaL_checknumber(L, 2);
luaL_checktype(L, 1, LUA_TTABLE);
size_t len = lua_objlen(L,1);
int l = 0;
int r = len - 1;
size_t cid = len/2;
for(size_t i = 0; l<=r; i++){
int m = l + (r - l) /2;
lua_pushinteger(L,m+1);
lua_gettable(L,1);
double t = luaL_checknumber(L, -1);
if(t==target){
lua_pushnumber(L, m);
return 1;
}
if(t > target) l = m + 1;
else r = m - 1;
lua_pop(L,1);
}
lua_pushnumber(L, -1);
return 1;
}
int l_split(lua_State* L){
size_t input_len = 0;
size_t split_len = 0;
char* input = (char*)luaL_checklstring(L, 1, &input_len);
char* split = (char*)luaL_checklstring(L, 2, &split_len);
size_t table_len = 1;
lua_newtable(L);
size_t current_len = 0;
char current[input_len];
memset(current, 0, input_len);
for(size_t i = 0; i <= (input_len - 1) - (split_len - 1); i++){
int match = 1;
for(size_t z = 0; z <= split_len - 1 && match; z++){
if(split[z] != input[z + i]) match = 0;
}
if(match){
lua_pushnumber(L, table_len++);
lua_pushstring(L, current);
lua_settable(L, -3);
memset(current, 0, input_len);
current_len = 0;
} else {
current[current_len] = input[i];
current_len++;
}
}
lua_pushnumber(L, table_len++);
lua_pushstring(L, current);
lua_settable(L, -3);
return 1;
}
int l_to_char_array(lua_State* L){
size_t input_len = 0;
char* input = (char*)luaL_checklstring(L, 1, &input_len);
lua_newtable(L);
for(size_t i = 0; i <= input_len - 1; i++){
lua_pushnumber(L, i + 1);
char uwu = input[i];
lua_pushstring(L, &uwu);
lua_settable(L, -3);
}
return 1;
}
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