ikarus/src/ikarus-io.c

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#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/uio.h>
#include <unistd.h>
#include "ikarus-data.h"
ikp
ikrt_io_error(){
switch(errno){
case EBADF : return fix(-2);
case EINTR : return fix(-3);
case ENOTDIR : return fix(-4);
case ENAMETOOLONG : return fix(-5);
case ENOENT : return fix(-6);
case EACCES : return fix(-7);
case ELOOP : return fix(-8);
case EISDIR : return fix(-9);
case EROFS : return fix(-10);
case EMFILE : return fix(-11);
case ENFILE : return fix(-12);
case ENXIO : return fix(-13);
case EOPNOTSUPP : return fix(-14);
case ENOSPC : return fix(-15);
case EDQUOT : return fix(-16);
case EIO : return fix(-17);
case ETXTBSY : return fix(-18);
case EFAULT : return fix(-19);
case EEXIST : return fix(-20);
case EINVAL : return fix(-21);
}
return fix(-1);
}
ikp
ikrt_close_fd(ikp fd, ikpcb* pcb){
int err = close(unfix(fd));
if(err == -1){
return ikrt_io_error();
} else {
return false_object;;
}
}
ikp
ikrt_open_input_fd(ikp fn, ikpcb* pcb){
int fh = open((char*)(fn+off_bytevector_data), O_RDONLY, 0);
if(fh > 0){
return fix(fh);
} else {
return ikrt_io_error();
}
}
ikp
ikrt_open_output_fd(ikp fn, ikp ikopts, ikpcb* pcb){
int opts = unfix(ikopts);
int mode = 0;
switch (opts){
/* mode 0: error if exists, create if does not exist */
case 0: mode = O_WRONLY | O_CREAT | O_EXCL; break;
/* mode 1: truncate if exists, error if not exists */
case 1: mode = O_WRONLY | O_TRUNC; break;
/* mode 2: truncate if exists, create if not exist */
case 2: mode = O_WRONLY | O_TRUNC | O_CREAT ; break;
/* mode 3: truncate if exists, error if not exists */
case 3: mode = O_WRONLY | O_TRUNC ; break;
case 4: mode = O_WRONLY | O_CREAT | O_EXCL ; break;
case 5: mode = O_WRONLY | O_CREAT ; break;
case 6: mode = O_WRONLY | O_CREAT ; break;
case 7: mode = O_WRONLY ; break;
}
int fh = open((char*)(fn+off_bytevector_data),
mode,
S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
if(fh > 0){
return fix(fh);
} else {
return ikrt_io_error();
}
}
ikp
ikrt_read_fd(ikp fd, ikp bv, ikp off, ikp cnt, ikpcb* pcb){
ssize_t bytes =
read(unfix(fd),
(char*)(bv+off_bytevector_data+unfix(off)),
unfix(cnt));
if(bytes >= 0){
return fix(bytes);
} else {
return ikrt_io_error();
}
}
ikp
ikrt_write_fd(ikp fd, ikp bv, ikp off, ikp cnt, ikpcb* pcb){
ssize_t bytes =
write(unfix(fd),
(char*)(bv+off_bytevector_data+unfix(off)),
unfix(cnt));
if(bytes >= 0){
return fix(bytes);
} else {
return ikrt_io_error();
}
}