/*  */
#include <time.h>

#include "../interpreter.h"


static int CLOCKS_PER_SECValue = CLOCKS_PER_SEC;

#ifdef CLK_PER_SEC
static int CLK_PER_SECValue = CLK_PER_SEC;
#endif

#ifdef CLK_TCK
static int CLK_TCKValue = CLK_TCK;
#endif

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

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

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

void StdDifftime(struct ParseState *Parser, struct Value *ReturnValue,
    struct Value **Param, int NumArgs)
{
    ReturnValue->Val->FP = difftime((time_t)Param[0]->Val->Integer,
        Param[1]->Val->Integer);
}

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

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

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

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

void StdStrftime(struct ParseState *Parser, struct Value *ReturnValue,
    struct Value **Param, int NumArgs)
{
    ReturnValue->Val->Integer = strftime(Param[0]->Val->Pointer,
        Param[1]->Val->Integer, Param[2]->Val->Pointer, Param[3]->Val->Pointer);
}

#ifndef WIN32
void StdStrptime(struct ParseState *Parser, struct Value *ReturnValue,
    struct Value **Param, int NumArgs)
{
	  extern char *strptime(const char *s, const char *format, struct tm *tm);

    ReturnValue->Val->Pointer = strptime(Param[0]->Val->Pointer,
        Param[1]->Val->Pointer, Param[2]->Val->Pointer);
}

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

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

/* handy structure definitions */
const char StdTimeDefs[] = "\
typedef int time_t; \
typedef int clock_t;\
";

/* all string.h functions */
struct LibraryFunction StdTimeFunctions[] =
{
    {StdAsctime, "char *asctime(struct tm *);"},
    {StdClock, "time_t clock();"},
    {StdCtime, "char *ctime(int *);"},
    {StdDifftime, "double difftime(int, int);"},
    {StdGmtime, "struct tm *gmtime(int *);"},
    {StdLocaltime, "struct tm *localtime(int *);"},
    {StdMktime, "int mktime(struct tm *ptm);"},
    {StdTime, "int time(int *);"},
    {StdStrftime, "int strftime(char *, int, char *, struct tm *);"},
#ifndef WIN32
    {StdStrptime, "char *strptime(char *, char *, struct tm *);"},
	{StdGmtime_r, "struct tm *gmtime_r(int *, struct tm *);"},
    {StdTimegm, "int timegm(struct tm *);"},
#endif
    {NULL, NULL}
};


/* creates various system-dependent definitions */
void StdTimeSetupFunc(Picoc *pc)
{
    /* make a "struct tm" which is the same size as a native tm structure */
    TypeCreateOpaqueStruct(pc, NULL, TableStrRegister(pc, "tm"),
        sizeof(struct tm));

    /* define CLK_PER_SEC etc. */
    VariableDefinePlatformVar(pc, NULL, "CLOCKS_PER_SEC", &pc->IntType,
        (union AnyValue*)&CLOCKS_PER_SECValue, false);
#ifdef CLK_PER_SEC
    VariableDefinePlatformVar(pc, NULL, "CLK_PER_SEC", &pc->IntType,
        (union AnyValue*)&CLK_PER_SECValue, false);
#endif
#ifdef CLK_TCK
    VariableDefinePlatformVar(pc, NULL, "CLK_TCK", &pc->IntType,
        (union AnyValue*)&CLK_TCKValue, false);
#endif
}