ref: b307865d7a8cc2e9ae02104907656c7f159ac5d3
dir: /iostream.c/
#include "llt.h"
#include "flisp.h"
static value_t iostreamsym, rdsym, wrsym, apsym, crsym, truncsym;
static value_t instrsym, outstrsym;
fltype_t *iostreamtype;
void print_iostream(value_t v, ios_t *f)
{
USED(v);
fl_print_str("#<io stream>", f);
}
void free_iostream(value_t self)
{
ios_t *s = value2c(ios_t*, self);
ios_close(s);
}
void relocate_iostream(value_t oldv, value_t newv)
{
ios_t *olds = value2c(ios_t*, oldv);
ios_t *news = value2c(ios_t*, newv);
if (news->buf == &olds->local[0]) {
news->buf = &news->local[0];
}
}
cvtable_t iostream_vtable = { print_iostream, relocate_iostream,
free_iostream, nil };
int fl_isiostream(value_t v)
{
return iscvalue(v) && cv_class((cvalue_t*)ptr(v)) == iostreamtype;
}
BUILTIN("iostream?", iostreamp)
{
argcount(nargs, 1);
return fl_isiostream(args[0]) ? FL_T : FL_F;
}
BUILTIN("eof-object", eof_object)
{
USED(args);
argcount(nargs, 0);
return FL_EOF;
}
BUILTIN("eof-object?", eof_objectp)
{
argcount(nargs, 1);
return (FL_EOF == args[0]) ? FL_T : FL_F;
}
static ios_t *toiostream(value_t v)
{
if (!fl_isiostream(v))
type_error("iostream", v);
return value2c(ios_t*, v);
}
ios_t *fl_toiostream(value_t v)
{
return toiostream(v);
}
BUILTIN("file", file)
{
if (nargs < 1)
argcount(nargs, 1);
int i, r=0, w=0, c=0, t=0, a=0;
for(i=1; i < (int)nargs; i++) {
if (args[i] == wrsym) w = 1;
else if (args[i] == apsym) { a = 1; w = 1; }
else if (args[i] == crsym) { c = 1; w = 1; }
else if (args[i] == truncsym) { t = 1; w = 1; }
else if (args[i] == rdsym) r = 1;
}
if ((r|w|c|t|a) == 0) r = 1; // default to reading
value_t f = cvalue(iostreamtype, sizeof(ios_t));
char *fname = tostring(args[0]);
ios_t *s = value2c(ios_t*, f);
if (ios_file(s, fname, r, w, c, t) == nil)
lerrorf(IOError, "could not open \"%s\"", fname);
if (a) ios_seek_end(s);
return f;
}
BUILTIN("buffer", buffer)
{
argcount(nargs, 0);
USED(args);
value_t f = cvalue(iostreamtype, sizeof(ios_t));
ios_t *s = value2c(ios_t*, f);
if (ios_mem(s, 0) == nil)
lerrorf(MemoryError, "could not allocate stream");
return f;
}
BUILTIN("read", read)
{
value_t arg = 0;
if (nargs > 1) {
argcount(nargs, 1);
}
else if (nargs == 0) {
arg = symbol_value(instrsym);
}
else {
arg = args[0];
}
(void)toiostream(arg);
fl_gc_handle(&arg);
value_t v = fl_read_sexpr(arg);
fl_free_gc_handles(1);
if (ios_eof(value2c(ios_t*,arg)))
return FL_EOF;
return v;
}
BUILTIN("io.getc", io_getc)
{
argcount(nargs, 1);
ios_t *s = toiostream(args[0]);
uint32_t wc;
int res;
if ((res = ios_getutf8(s, &wc)) == IOS_EOF)
//lerrorf(IOError, "end of file reached");
return FL_EOF;
if (res == 0)
lerrorf(IOError, "invalid UTF-8 sequence");
return mk_wchar(wc);
}
BUILTIN("io.peekc", io_peekc)
{
argcount(nargs, 1);
ios_t *s = toiostream(args[0]);
uint32_t wc;
int res;
if ((res = ios_peekutf8(s, &wc)) == IOS_EOF)
return FL_EOF;
if (res == 0)
lerrorf(IOError, "invalid UTF-8 sequence");
return mk_wchar(wc);
}
BUILTIN("io.putc", io_putc)
{
argcount(nargs, 2);
ios_t *s = toiostream(args[0]);
if (!iscprim(args[1]) || ((cprim_t*)ptr(args[1]))->type != wchartype)
type_error("wchar", args[1]);
uint32_t wc = *(uint32_t*)cp_data((cprim_t*)ptr(args[1]));
return fixnum(ios_pututf8(s, wc));
}
BUILTIN("io.skip", io_skip)
{
argcount(nargs, 2);
ios_t *s = toiostream(args[0]);
off_t off = tooffset(args[1]);
off_t res = ios_skip(s, off);
if (res < 0)
return FL_F;
return sizeof(res) == sizeof(int64_t) ? mk_int64(res) : mk_int32(res);
}
BUILTIN("io.flush", io_flush)
{
argcount(nargs, 1);
ios_t *s = toiostream(args[0]);
if (ios_flush(s) != 0)
return FL_F;
return FL_T;
}
BUILTIN("io.close", io_close)
{
argcount(nargs, 1);
ios_t *s = toiostream(args[0]);
ios_close(s);
return FL_T;
}
BUILTIN("io.discardbuffer", io_discardbuffer)
{
argcount(nargs, 1);
ios_t *s = toiostream(args[0]);
ios_purge(s);
return FL_T;
}
BUILTIN("io.eof?", io_eofp)
{
argcount(nargs, 1);
ios_t *s = toiostream(args[0]);
return (ios_eof(s) ? FL_T : FL_F);
}
BUILTIN("io.seek", io_seek)
{
argcount(nargs, 2);
ios_t *s = toiostream(args[0]);
size_t pos = toulong(args[1]);
off_t res = ios_seek(s, (off_t)pos);
if (res == -1)
return FL_F;
return FL_T;
}
BUILTIN("io.pos", io_pos)
{
argcount(nargs, 1);
ios_t *s = toiostream(args[0]);
off_t res = ios_pos(s);
if (res == -1)
return FL_F;
return size_wrap((size_t)res);
}
BUILTIN("write", write)
{
if (nargs < 1 || nargs > 2)
argcount(nargs, 1);
ios_t *s;
if (nargs == 2)
s = toiostream(args[1]);
else
s = toiostream(symbol_value(outstrsym));
fl_print(s, args[0]);
return args[0];
}
BUILTIN("io.read", io_read)
{
if (nargs != 3)
argcount(nargs, 2);
(void)toiostream(args[0]);
size_t n;
fltype_t *ft;
if (nargs == 3) {
// form (io.read s type count)
ft = get_array_type(args[1]);
n = toulong(args[2]) * ft->elsz;
}
else {
ft = get_type(args[1]);
if (ft->eltype != nil && !iscons(cdr_(cdr_(args[1]))))
lerrorf(ArgError, "incomplete type");
n = ft->size;
}
value_t cv = cvalue(ft, n);
char *data;
if (iscvalue(cv)) data = cv_data((cvalue_t*)ptr(cv));
else data = cp_data((cprim_t*)ptr(cv));
size_t got = ios_read(value2c(ios_t*,args[0]), data, n);
if (got < n)
//lerrorf(IOError, "end of input reached");
return FL_EOF;
return cv;
}
// args must contain data[, offset[, count]]
static void get_start_count_args(value_t *args, uint32_t nargs, size_t sz,
size_t *offs, size_t *nb)
{
if (nargs > 1) {
*offs = toulong(args[1]);
if (nargs > 2)
*nb = toulong(args[2]);
else
*nb = sz - *offs;
if (*offs >= sz || *offs + *nb > sz)
bounds_error(args[0], args[1]);
}
}
BUILTIN("io.write", io_write)
{
if (nargs < 2 || nargs > 4)
argcount(nargs, 2);
ios_t *s = toiostream(args[0]);
if (iscprim(args[1]) && ((cprim_t*)ptr(args[1]))->type == wchartype) {
if (nargs > 2)
lerrorf(ArgError,
"io.write: offset argument not supported for characters");
uint32_t wc = *(uint32_t*)cp_data((cprim_t*)ptr(args[1]));
return fixnum(ios_pututf8(s, wc));
}
char *data;
size_t sz, offs=0;
to_sized_ptr(args[1], &data, &sz);
size_t nb = sz;
if (nargs > 2) {
get_start_count_args(&args[1], nargs-1, sz, &offs, &nb);
data += offs;
}
return size_wrap(ios_write(s, data, nb));
}
BUILTIN("dump", dump)
{
if (nargs < 1 || nargs > 3)
argcount(nargs, 1);
ios_t *s = toiostream(symbol_value(outstrsym));
char *data;
size_t sz, offs=0;
to_sized_ptr(args[0], &data, &sz);
size_t nb = sz;
if (nargs > 1) {
get_start_count_args(args, nargs, sz, &offs, &nb);
data += offs;
}
hexdump(s, data, nb, offs);
return FL_T;
}
static char get_delim_arg(value_t arg)
{
size_t uldelim = toulong(arg);
if (uldelim > 0x7f) {
// wchars > 0x7f, or anything else > 0xff, are out of range
if ((iscprim(arg) && cp_class((cprim_t*)ptr(arg))==wchartype) ||
uldelim > 0xff)
lerrorf(ArgError, "delimiter out of range");
}
return (char)uldelim;
}
BUILTIN("io.readuntil", io_readuntil)
{
argcount(nargs, 2);
value_t str = cvalue_string(80);
cvalue_t *cv = (cvalue_t*)ptr(str);
char *data = cv_data(cv);
ios_t dest;
ios_mem(&dest, 0);
ios_setbuf(&dest, data, 80, 0);
char delim = get_delim_arg(args[1]);
ios_t *src = toiostream(args[0]);
size_t n = ios_copyuntil(&dest, src, delim);
cv->len = n;
if (dest.buf != data) {
// outgrew initial space
size_t sz;
cv->data = ios_takebuf(&dest, &sz);
#ifndef BOEHM_GC
cv_autorelease(cv);
#endif
} else {
((char*)cv->data)[n] = '\0';
}
if (n == 0 && ios_eof(src))
return FL_EOF;
return str;
}
BUILTIN("io.copyuntil", io_copyuntil)
{
argcount(nargs, 3);
ios_t *dest = toiostream(args[0]);
ios_t *src = toiostream(args[1]);
char delim = get_delim_arg(args[2]);
return size_wrap(ios_copyuntil(dest, src, delim));
}
BUILTIN("io.copy", io_copy)
{
if (nargs < 2 || nargs > 3)
argcount(nargs, 2);
ios_t *dest = toiostream(args[0]);
ios_t *src = toiostream(args[1]);
if (nargs == 3) {
size_t n = toulong(args[2]);
return size_wrap(ios_copy(dest, src, n));
}
return size_wrap(ios_copyall(dest, src));
}
value_t stream_to_string(value_t *ps)
{
value_t str;
size_t n;
ios_t *st = value2c(ios_t*,*ps);
if (st->buf == &st->local[0]) {
n = st->size;
str = cvalue_string(n);
memmove(cvalue_data(str), value2c(ios_t*,*ps)->buf, n);
ios_trunc(value2c(ios_t*,*ps), 0);
}
else {
char *b = ios_takebuf(st, &n); n--;
b[n] = '\0';
str = cvalue_from_ref(stringtype, b, n, FL_NIL);
#ifndef BOEHM_GC
cv_autorelease((cvalue_t*)ptr(str));
#endif
}
return str;
}
BUILTIN("io.tostring!", io_tostring)
{
argcount(nargs, 1);
ios_t *src = toiostream(args[0]);
if (src->bm != bm_mem)
lerrorf(ArgError, "requires memory stream");
return stream_to_string(&args[0]);
}
void iostream_init(void)
{
iostreamsym = symbol("iostream");
rdsym = symbol(":read");
wrsym = symbol(":write");
apsym = symbol(":append");
crsym = symbol(":create");
truncsym = symbol(":truncate");
instrsym = symbol("*input-stream*");
outstrsym = symbol("*output-stream*");
iostreamtype = define_opaque_type(iostreamsym, sizeof(ios_t),
&iostream_vtable, nil);
setc(symbol("*stdout*"), cvalue_from_ref(iostreamtype, ios_stdout,
sizeof(ios_t), FL_NIL));
setc(symbol("*stderr*"), cvalue_from_ref(iostreamtype, ios_stderr,
sizeof(ios_t), FL_NIL));
setc(symbol("*stdin*" ), cvalue_from_ref(iostreamtype, ios_stdin,
sizeof(ios_t), FL_NIL));
}