/* stdlib.h library for large systems - small embedded systems use clibrary.c instead */
#include "../picoc.h"

#ifndef BUILTIN_MINI_STDLIB

static int ZeroValue = 0;
static int TRUEValue = 1;

void StdlibAtof(struct ParseState *Parser, struct Value *ReturnValue, struct Value **Param, int NumArgs)
{
    ReturnValue->Val->FP = atof(Param[0]->Val->Pointer);
}

void StdlibAtoi(struct ParseState *Parser, struct Value *ReturnValue, struct Value **Param, int NumArgs)
{
    ReturnValue->Val->Integer = atoi(Param[0]->Val->Pointer);
}

void StdlibAtol(struct ParseState *Parser, struct Value *ReturnValue, struct Value **Param, int NumArgs)
{
    ReturnValue->Val->Integer = atol(Param[0]->Val->Pointer);
}

void StdlibStrtod(struct ParseState *Parser, struct Value *ReturnValue, struct Value **Param, int NumArgs)
{
    ReturnValue->Val->FP = strtod(Param[0]->Val->Pointer, Param[1]->Val->Pointer);
}

void StdlibStrtol(struct ParseState *Parser, struct Value *ReturnValue, struct Value **Param, int NumArgs)
{
    ReturnValue->Val->Integer = strtol(Param[0]->Val->Pointer, Param[1]->Val->Pointer, Param[2]->Val->Integer);
}

void StdlibStrtoul(struct ParseState *Parser, struct Value *ReturnValue, struct Value **Param, int NumArgs)
{
    ReturnValue->Val->Integer = strtoul(Param[0]->Val->Pointer, Param[1]->Val->Pointer, Param[2]->Val->Integer);
}

void StdlibMalloc(struct ParseState *Parser, struct Value *ReturnValue, struct Value **Param, int NumArgs)
{
    ReturnValue->Val->Pointer = malloc(Param[0]->Val->Integer);
}

void StdlibCalloc(struct ParseState *Parser, struct Value *ReturnValue, struct Value **Param, int NumArgs)
{
    ReturnValue->Val->Pointer = calloc(Param[0]->Val->Integer, Param[1]->Val->Integer);
}

void StdlibRealloc(struct ParseState *Parser, struct Value *ReturnValue, struct Value **Param, int NumArgs)
{
    ReturnValue->Val->Pointer = realloc(Param[0]->Val->Pointer, Param[1]->Val->Integer);
}

void StdlibFree(struct ParseState *Parser, struct Value *ReturnValue, struct Value **Param, int NumArgs)
{
    free(Param[0]->Val->Pointer);
}

void StdlibRand(struct ParseState *Parser, struct Value *ReturnValue, struct Value **Param, int NumArgs)
{
    ReturnValue->Val->Integer = rand();
}

void StdlibSrand(struct ParseState *Parser, struct Value *ReturnValue, struct Value **Param, int NumArgs)
{
    srand(Param[0]->Val->Integer);
}

void StdlibAbort(struct ParseState *Parser, struct Value *ReturnValue, struct Value **Param, int NumArgs)
{
    ProgramFail(Parser, "abort");
}

void StdlibExit(struct ParseState *Parser, struct Value *ReturnValue, struct Value **Param, int NumArgs)
{
    PlatformExit(Param[0]->Val->Integer);
}

void StdlibGetenv(struct ParseState *Parser, struct Value *ReturnValue, struct Value **Param, int NumArgs)
{
    ReturnValue->Val->Pointer = getenv(Param[0]->Val->Pointer);
}

void StdlibSystem(struct ParseState *Parser, struct Value *ReturnValue, struct Value **Param, int NumArgs)
{
    ReturnValue->Val->Integer = system(Param[0]->Val->Pointer);
}

/* all stdlib.h functions */
struct LibraryFunction StdlibFunctions[] =
{
    { StdlibAtof,           "float atof(char *);" },
    { StdlibAtoi,           "int atoi(char *);" },
    { StdlibAtol,           "int atol(char *);" },
    { StdlibStrtod,         "float strtod(char *,char **);" },
    { StdlibStrtol,         "int strtol(char *,char **,int);" },
    { StdlibStrtoul,        "int strtoul(char *,char **,int);" },
    { StdlibMalloc,         "void *malloc(int);" },
    { StdlibCalloc,         "void *calloc(int,int);" },
    { StdlibRealloc,        "void *realloc(void *,int);" },
    { StdlibFree,           "void free(void *);" },
    { StdlibRand,           "int rand();" },
    { StdlibSrand,          "void srand(int);" },
    { StdlibAbort,          "void abort();" },
    { StdlibExit,           "void exit(int);" },
    { StdlibGetenv,         "char *getenv(char *);" },
    { StdlibSystem,         "int system(char *);" },
    { NULL,                 NULL }
};

/* creates various system-dependent definitions */
void StdlibSetupFunc(void)
{
    /* define NULL, TRUE and FALSE */
    if (!VariableDefined(TableStrRegister("NULL")))
        VariableDefinePlatformVar(NULL, "NULL", &IntType, (union AnyValue *)&ZeroValue, FALSE);
        
    if (!VariableDefined(TableStrRegister("TRUE")))
    {
        VariableDefinePlatformVar(NULL, "TRUE", &IntType, (union AnyValue *)&TRUEValue, FALSE);
        VariableDefinePlatformVar(NULL, "FALSE", &IntType, (union AnyValue *)&ZeroValue, FALSE);
    }
}

#endif /* !BUILTIN_MINI_STDLIB */