/*
	efunctions.c: this file contains the efunctions called from
	inside eval_instruction() in interpret.c.  Note: if you are adding
    local efunctions that are specific to your driver, you would be better
    off adding them to a separate source file.  Doing so will make it much
    easier for you to upgrade (won't have to patch this file).  Be sure
    to #include "lpc_incl.h" in that separate source file.
*/

#include "std.h"
#include "lpc_incl.h"
#include "file_incl.h"
#include "lint.h"
#include "include/localtime.h"
#include "port.h"
#include "crypt.h"
#include "efun_protos.h"

/* get a value for CLK_TCK for use by times() */
#if (defined(TIMES) && !defined(RUSAGE))
/* this may need #ifdef'd to handle different types of machines */
#include <limits.h>
#endif

#ifdef F_CRYPT
#define SALT_LEN	8

void
f_crypt PROT((void))
{
    char *res, *p, salt[SALT_LEN + 1];
    char *choice =
    "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ./";

    if (sp->type == T_STRING && SVALUE_STRLEN(sp) >= 2) {
	p = sp->u.string;
    } else {
	int i;
	
	for (i = 0; i < SALT_LEN; i++)
	    salt[i] = choice[random_number(strlen(choice))];

	salt[SALT_LEN] = 0;
	p = salt;
    }
    
    res = string_copy(CRYPT((sp-1)->u.string, p), "f_crypt");
    pop_stack();
    free_string_svalue(sp);
    sp->subtype = STRING_MALLOC;
    sp->u.string = res;
}
#endif

#ifdef F_OLDCRYPT
void
f_oldcrypt PROT((void)) {
    char *res, salt[3];
    char *choice =
    "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ./";

    if (sp->type == T_STRING && SVALUE_STRLEN(sp) >= 2) {
        salt[0] = sp->u.string[0];
        salt[1] = sp->u.string[1];
        free_string_svalue(sp--);
    } else {
        salt[0] = choice[random_number(strlen(choice))];
        salt[1] = choice[random_number(strlen(choice))];
        pop_stack();
    }
    salt[2] = 0;
    res = string_copy(OLDCRYPT(sp->u.string, salt), "f_crypt");
    free_string_svalue(sp);
    sp->subtype = STRING_MALLOC;
    sp->u.string = res;
}
#endif

#ifdef F_LOCALTIME
/* FIXME: most of the #ifdefs here should be based on configure checks
   instead.  Same for rusage() */
void
f_localtime PROT((void))
{
    struct tm *tm;
    array_t *vec;
    time_t lt;

#ifdef sequent
    struct timezone tz;
#endif

    lt = sp->u.number;
    tm = localtime(&lt);

    vec = allocate_empty_array(11);
    vec->item[LT_SEC].type = T_NUMBER;
    vec->item[LT_SEC].u.number = tm->tm_sec;
    vec->item[LT_MIN].type = T_NUMBER;
    vec->item[LT_MIN].u.number = tm->tm_min;
    vec->item[LT_HOUR].type = T_NUMBER;
    vec->item[LT_HOUR].u.number = tm->tm_hour;
    vec->item[LT_MDAY].type = T_NUMBER;
    vec->item[LT_MDAY].u.number = tm->tm_mday;
    vec->item[LT_MON].type = T_NUMBER;
    vec->item[LT_MON].u.number = tm->tm_mon;
    vec->item[LT_YEAR].type = T_NUMBER;
    vec->item[LT_YEAR].u.number = tm->tm_year + 1900;
    vec->item[LT_WDAY].type = T_NUMBER;
    vec->item[LT_WDAY].u.number = tm->tm_wday;
    vec->item[LT_YDAY].type = T_NUMBER;
    vec->item[LT_YDAY].u.number = tm->tm_yday;
    vec->item[LT_GMTOFF].type = T_NUMBER;
    vec->item[LT_ZONE].type = T_STRING;
    vec->item[LT_ZONE].subtype = STRING_MALLOC;
    vec->item[LT_ISDST].type = T_NUMBER;
#if defined(BSD42) || defined(apollo) || defined(_AUX_SOURCE) \
	|| defined(OLD_ULTRIX)
    /* 4.2 BSD doesn't seem to provide any way to get these last three values */
    vec->item[LT_GMTOFF].u.number = 0;
    vec->item[LT_ZONE].type = T_NUMBER;
    vec->item[LT_ZONE].u.number = 0;
    vec->item[LT_ISDST].u.number = -1;
#else				/* BSD42 */
    vec->item[LT_ISDST].u.number = tm->tm_isdst;
#if defined(sequent)
    vec->item[LT_GMTOFF].u.number = 0;
    gettimeofday(NULL, &tz);
    vec->item[LT_GMTOFF].u.number = tz.tz_minuteswest;
    vec->item[LT_ZONE].u.string =
	string_copy(timezone(tz.tz_minuteswest, tm->tm_isdst), "f_localtime");
#else				/* sequent */
#if (defined(hpux) || defined(_SEQUENT_) || defined(_AIX) || defined(SunOS_5) \
	|| defined(SVR4) || defined(sgi) || defined(linux) || defined(cray) \
	|| defined(LATTICE) || defined(SCO))
    if (!tm->tm_isdst) {
	vec->item[LT_GMTOFF].u.number = timezone;
	vec->item[LT_ZONE].u.string = string_copy(tzname[0], "f_localtime");
    } else {
#if (defined(_AIX) || defined(hpux) || defined(linux) || defined(cray) \
	|| defined(LATTICE))
	vec->item[LT_GMTOFF].u.number = timezone;
#else
	vec->item[LT_GMTOFF].u.number = altzone;
#endif
	vec->item[LT_ZONE].u.string = string_copy(tzname[1], "f_localtime");
    }
#else
#ifndef WIN32
    vec->item[LT_GMTOFF].u.number = tm->tm_gmtoff;
    vec->item[LT_ZONE].u.string = string_copy(tm->tm_zone, "f_localtime");
#else
    vec->item[LT_GMTOFF].u.number = _timezone;
    vec->item[LT_ZONE].u.string = string_copy(_tzname[_daylight?1:0],"f_localtime");
#endif
#endif
#endif				/* sequent */
#endif				/* BSD42 */
    put_array(vec);
}
#endif

#ifdef F_RUSAGE
#ifdef WIN32
void f_rusage PROT((void))
{
    error("rusage() not supported under Windows.\n");
}
#else
	
#ifdef RUSAGE
void
f_rusage PROT((void))
{
    struct rusage rus;
    mapping_t *m;
    long usertime, stime;
    int maxrss;

    if (getrusage(RUSAGE_SELF, &rus) < 0) {
	m = allocate_mapping(0);
    } else {
#if 1 /* Was !SunOS_5 */
	usertime = rus.ru_utime.tv_sec * 1000 + rus.ru_utime.tv_usec / 1000;
	stime = rus.ru_stime.tv_sec * 1000 + rus.ru_stime.tv_usec / 1000;
#else
	usertime = rus.ru_utime.tv_sec * 1000 + rus.ru_utime.tv_nsec / 1000000;
	stime = rus.ru_stime.tv_sec * 1000 + rus.ru_stime.tv_nsec / 1000000;
#endif
	maxrss = rus.ru_maxrss;
#ifdef sun
	maxrss *= getpagesize() / 1024;
#endif
	m = allocate_mapping(16);
	add_mapping_pair(m, "utime", usertime);
	add_mapping_pair(m, "stime", stime);
	add_mapping_pair(m, "maxrss", maxrss);
	add_mapping_pair(m, "ixrss", rus.ru_ixrss);
	add_mapping_pair(m, "idrss", rus.ru_idrss);
	add_mapping_pair(m, "isrss", rus.ru_isrss);
	add_mapping_pair(m, "minflt", rus.ru_minflt);
	add_mapping_pair(m, "majflt", rus.ru_majflt);
	add_mapping_pair(m, "nswap", rus.ru_nswap);
	add_mapping_pair(m, "inblock", rus.ru_inblock);
	add_mapping_pair(m, "oublock", rus.ru_oublock);
	add_mapping_pair(m, "msgsnd", rus.ru_msgsnd);
	add_mapping_pair(m, "msgrcv", rus.ru_msgrcv);
	add_mapping_pair(m, "nsignals", rus.ru_nsignals);
	add_mapping_pair(m, "nvcsw", rus.ru_nvcsw);
	add_mapping_pair(m, "nivcsw", rus.ru_nivcsw);
    }
    push_refed_mapping(m);
}
#else

#ifdef GET_PROCESS_STATS
void
f_rusage PROT((void))
{
    struct process_stats ps;
    mapping_t *m;
    int utime, stime, maxrss;

    if (get_process_stats(NULL, PS_SELF, &ps, NULL) == -1)
	m = allocate_mapping(0);
    else {
	utime = ps.ps_utime.tv_sec * 1000 + ps.ps_utime.tv_usec / 1000;
	stime = ps.ps_stime.tv_sec * 1000 + ps.ps_stime.tv_usec / 1000;
	maxrss = ps.ps_maxrss * getpagesize() / 1024;

	m = allocate_mapping(19);
	add_mapping_pair(m, "utime", utime);
	add_mapping_pair(m, "stime", stime);
	add_mapping_pair(m, "maxrss", maxrss);
	add_mapping_pair(m, "pagein", ps.ps_pagein);
	add_mapping_pair(m, "reclaim", ps.ps_reclaim);
	add_mapping_pair(m, "zerofill", ps.ps_zerofill);
	add_mapping_pair(m, "pffincr", ps.ps_pffincr);
	add_mapping_pair(m, "pffdecr", ps.ps_pffdecr);
	add_mapping_pair(m, "swap", ps.ps_swap);
	add_mapping_pair(m, "syscall", ps.ps_syscall);
	add_mapping_pair(m, "volcsw", ps.ps_volcsw);
	add_mapping_pair(m, "involcsw", ps.ps_involcsw);
	add_mapping_pair(m, "signal", ps.ps_signal);
	add_mapping_pair(m, "lread", ps.ps_lread);
	add_mapping_pair(m, "lwrite", ps.ps_lwrite);
	add_mapping_pair(m, "bread", ps.ps_bread);
	add_mapping_pair(m, "bwrite", ps.ps_bwrite);
	add_mapping_pair(m, "phread", ps.ps_phread);
	add_mapping_pair(m, "phwrite", ps.ps_phwrite);
    }
    push_refed_mapping(m);
}
#else

#ifdef TIMES			/* has times() but not getrusage() */

/*
  warning times are reported in processor dependent units of time.
  see man pages for 'times' to figure out how long a tick is on your system.
*/

void
f_rusage PROT((void))
{
    mapping_t *m;
    struct tms t;

    times(&t);
    m = allocate_mapping(2);
    add_mapping_pair(m, "utime", t.tms_utime * 1000 / CLK_TCK);
    add_mapping_pair(m, "stime", t.tms_stime * 1000 / CLK_TCK);
    push_refed_mapping(m);
}

#else

#ifdef LATTICE

void
f_rusage PROT((void))
{
    mapping_t *m;
    int i;
    unsigned int clock[2];

    i = timer(clock);		/* returns 0 if success, -1 otherwise */
    m = allocate_mapping(2);
    add_mapping_pair(m, "utime", i ? 0 : clock[0] * 1000 + clock[1] / 1000);
    add_mapping_pair(m, "stime", i ? 0 : clock[0] * 1000 + clock[1] / 1000);
    push_refed_mapping(m);
}

#endif				/* LATTICE */

#endif				/* TIMES */

#endif				/* GET_PROCESS_STATS */

#endif				/* RUSAGE */

#endif				/* WIN32 */

#endif

#ifdef F_MALLOC_CHECK
/* this efun only useful on the NeXT (func_spec.c has #ifdef NeXT).  A
   non-zero return value indicates that some memory corruption has occurred
   at some time prior to this calling of this efun.
*/
void
f_malloc_check PROT((void))
{
    push_number(NXMallocCheck());
}
#endif

#ifdef F_MALLOC_DEBUG
/* NeXT specific efun for setting the debugging level of NeXT's built-in
   malloc.
*/
void
f_malloc_debug PROT((void))
{
    int level;

    level = sp->u.number;
    if (level < 0) {
        int rc;

        rc = malloc_debug(0);
        malloc_singlethreaded();
        sp->u.number = rc;
    } else {
        sp->u.number = malloc_debug(level);
    }
}
#endif