/*  */
#include <fcntl.h>
#include <limits.h>

#include "../interpreter.h"


static int ZeroValue = 0;

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

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

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

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

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

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

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

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

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

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

void UnistdDup2(struct ParseState *Parser, struct Value *ReturnValue,
    struct Value **Param, int NumArgs)
{
    ReturnValue->Val->Integer = dup2(Param[0]->Val->Integer, Param[1]->Val->Integer);
}

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

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

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

void UnistdFdatasync(struct ParseState *Parser, struct Value *ReturnValue,
    struct Value **Param, int NumArgs)
{
#ifdef F_FULLSYNC
    /* Mac OS X equivalent */
    ReturnValue->Val->Integer = fcntl(Param[0]->Val->Integer, F_FULLFSYNC);
#else
    ReturnValue->Val->Integer = fdatasync(Param[0]->Val->Integer);
#endif
}

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

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

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

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

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

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

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

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

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

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

void UnistdGetlogin(struct ParseState *Parser, struct Value *ReturnValue,
    struct Value **Param, int NumArgs)
{
    ReturnValue->Val->Pointer = getlogin();
}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

#if 0
void UnistdSwab(struct ParseState *Parser, struct Value *ReturnValue,
    struct Value **Param, int NumArgs)
{
    ReturnValue->Val->Integer = swab(Param[0]->Val->Pointer,
        Param[1]->Val->Pointer, Param[2]->Val->Integer);
}
#endif

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

void UnistdSync(struct ParseState *Parser, struct Value *ReturnValue,
    struct Value **Param, int NumArgs)
{
    sync();
}

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

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

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

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

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

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

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

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

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

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

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


/* handy structure definitions */
const char UnistdDefs[] = "\
typedef int uid_t; \
typedef int gid_t; \
typedef int pid_t; \
typedef int off_t; \
typedef int size_t; \
typedef int ssize_t; \
typedef int useconds_t;\
typedef int intptr_t;\
";

/* all unistd.h functions */
struct LibraryFunction UnistdFunctions[] =
{
    {UnistdAccess, "int access(char*, int);"},
    {UnistdAlarm, "unsigned int alarm(unsigned int);"},
/*    {UnistdBrk, "int brk(void*);"}, */
    {UnistdChdir, "int chdir(char*);"},
    {UnistdChroot, "int chroot(char*);"},
    {UnistdChown, "int chown(char*, uid_t, gid_t);"},
    {UnistdClose, "int close(int);"},
    {UnistdConfstr, "size_t confstr(int, char*, size_t);"},
    {UnistdCtermid, "char *ctermid(char*);"},
/*    {UnistdCuserid, "char *cuserid(char*);"}, */
    {UnistdDup, "int dup(int);"},
    {UnistdDup2, "int dup2(int, int);"},
/*     {UnistdEncrypt, "void encrypt(char[64], int);"}, */
/*    {UnistdExecl, "int execl(char*, char*, ...);"}, */
/*    {UnistdExecle, "int execle(char*, char*, ...);"}, */
/*    {UnistdExeclp, "int execlp(char*, char*, ...);"}, */
/*    {UnistdExecv, "int execv(char*, char* []);"}, */
/*    {UnistdExecve, "int execve(char*, char* [], char* []);"}, */
/*    {UnistdExecvp, "int execvp(char*, char* []);"}, */
    {Unistd_Exit, "void _exit(int);"},
    {UnistdFchown, "int fchown(int, uid_t, gid_t);"},
    {UnistdFchdir, "int fchdir(int);"},
    {UnistdFdatasync, "int fdatasync(int);"},
    {UnistdFork, "pid_t fork(void);"},
    {UnistdFpathconf, "long fpathconf(int, int);"},
    {UnistdFsync, "int fsync(int);"},
    {UnistdFtruncate, "int ftruncate(int, off_t);"},
    {UnistdGetcwd, "char *getcwd(char*, size_t);"},
    {UnistdGetdtablesize, "int getdtablesize(void);"},
    {UnistdGetegid, "gid_t getegid(void);"},
    {UnistdGeteuid, "uid_t geteuid(void);"},
    {UnistdGetgid, "gid_t getgid(void);"},
/*    {UnistdGetgroups, "int getgroups(int, gid_t []);"}, */
    {UnistdGethostid, "long gethostid(void);"},
    {UnistdGetlogin, "char *getlogin(void);"},
    {UnistdGetlogin_r, "int getlogin_r(char*, size_t);"},
/*    {UnistdGetopt, "int getopt(int, char * [], char *);"}, */
    {UnistdGetpagesize, "int getpagesize(void);"},
    {UnistdGetpass, "char *getpass(char*);"},
/*    {UnistdGetpgid, "pid_t getpgid(pid_t);"}, */
    {UnistdGetpgrp, "pid_t getpgrp(void);"},
    {UnistdGetpid, "pid_t getpid(void);"},
    {UnistdGetppid, "pid_t getppid(void);"},
/*    {UnistdGetsid, "pid_t getsid(pid_t);"}, */
    {UnistdGetuid, "uid_t getuid(void);"},
    {UnistdGetwd, "char *getwd(char*);"},
    {UnistdIsatty, "int isatty(int);"},
    {UnistdLchown, "int lchown(char*, uid_t, gid_t);"},
    {UnistdLink, "int link(char*, char *);"},
    {UnistdLockf, "int lockf(int, int, off_t);"},
    {UnistdLseek, "off_t lseek(int, off_t, int);"},
    {UnistdNice, "int nice(int);"},
    {UnistdPathconf, "long pathconf(char*, int);"},
    {UnistdPause, "int pause(void);"},
/*    {UnistdPipe, "int pipe(int [2]);"}, */
/*    {UnistdPread, "ssize_t pread(int, void*, size_t, off_t);"}, */
/*    {UnistdPthread_atfork, "int pthread_atfork(void (*)(void), void (*)(void), void(*)(void));"}, */
/*    {UnistdPwrite, "ssize_t pwrite(int, void*, size_t, off_t);"}, */
    {UnistdRead, "ssize_t read(int, void*, size_t);"},
    {UnistdReadlink, "int readlink(char*, char*, size_t);"},
    {UnistdRmdir, "int rmdir(char*);"},
    {UnistdSbrk, "void *sbrk(intptr_t);"},
    {UnistdSetgid, "int setgid(gid_t);"},
    {UnistdSetpgid, "int setpgid(pid_t, pid_t);"},
    {UnistdSetpgrp, "pid_t setpgrp(void);"},
    {UnistdSetregid, "int setregid(gid_t, gid_t);"},
    {UnistdSetreuid, "int setreuid(uid_t, uid_t);"},
    {UnistdSetsid, "pid_t setsid(void);"},
    {UnistdSetuid, "int setuid(uid_t);"},
    {UnistdSleep, "unsigned int sleep(unsigned int);"},
/*    {UnistdSwab, "void swab(void*, void *, ssize_t);"}, */
    {UnistdSymlink, "int symlink(char*, char *);"},
    {UnistdSync, "void sync(void);"},
    {UnistdSysconf, "long sysconf(int);"},
    {UnistdTcgetpgrp, "pid_t tcgetpgrp(int);"},
    {UnistdTcsetpgrp, "int tcsetpgrp(int, pid_t);"},
    {UnistdTruncate, "int truncate(char*, off_t);"},
    {UnistdTtyname, "char *ttyname(int);"},
    {UnistdTtyname_r, "int ttyname_r(int, char*, size_t);"},
    {UnistdUalarm, "useconds_t ualarm(useconds_t, useconds_t);"},
    {UnistdUnlink, "int unlink(char*);"},
    {UnistdUsleep, "int usleep(useconds_t);"},
    {UnistdVfork, "pid_t vfork(void);"},
    {UnistdWrite, "ssize_t write(int, void*, size_t);"},
    {NULL, NULL}
};

/* creates various system-dependent definitions */
extern char *optarg;
extern int optind, opterr, optopt;
void UnistdSetupFunc(Picoc *pc)
{
    /* define NULL */
    if (!VariableDefined(pc, TableStrRegister(pc, "NULL")))
        VariableDefinePlatformVar(pc, NULL, "NULL", &pc->IntType,
            (union AnyValue*)&ZeroValue, false);

    /* define optarg and friends */
    VariableDefinePlatformVar(pc, NULL, "optarg", pc->CharPtrType,
        (union AnyValue *)&optarg, true);
    VariableDefinePlatformVar(pc, NULL, "optind", &pc->IntType,
        (union AnyValue *)&optind, true);
    VariableDefinePlatformVar(pc, NULL, "opterr", &pc->IntType,
        (union AnyValue *)&opterr, true);
    VariableDefinePlatformVar(pc, NULL, "optopt", &pc->IntType,
        (union AnyValue *)&optopt, true);
}