Hana 9e216da9ef go.mod: add go.mod and move pygments to third_party
After go1.16, go will use module mode by default,
even when the repository is checked out under GOPATH
or in a one-off directory. Add go.mod, go.sum to keep
this repo buildable without opting out of the module
mode.

> go mod init github.com/mmcgrana/gobyexample
> go mod tidy
> go mod vendor

In module mode, the 'vendor' directory is special
and its contents will be actively maintained by the
go command. pygments aren't the dependency the go will
know about, so it will delete the contents from vendor
directory. Move it to `third_party` directory now.

And, vendor the blackfriday package.

Note: the tutorial contents are not affected by the
change in go1.16 because all the examples in this
tutorial ask users to run the go command with the
explicit list of files to be compiled (e.g.
`go run hello-world.go` or `go build command-line-arguments.go`).
When the source list is provided, the go command does
not have to compute the build list and whether it's
running in GOPATH mode or module mode becomes irrelevant.
2021-02-15 16:45:26 -05:00

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#pike __REAL_VERSION__
//! A string wrapper that pretends to be a @[Stdio.File] object
//! in addition to some features of a @[Stdio.FILE] object.
//! This constant can be used to distinguish a FakeFile object
//! from a real @[Stdio.File] object.
constant is_fake_file = 1;
protected string data;
protected int ptr;
protected int(0..1) r;
protected int(0..1) w;
protected int mtime;
protected function read_cb;
protected function read_oob_cb;
protected function write_cb;
protected function write_oob_cb;
protected function close_cb;
//! @seealso
//! @[Stdio.File()->close()]
int close(void|string direction) {
direction = lower_case(direction||"rw");
int cr = has_value(direction, "r");
int cw = has_value(direction, "w");
if(cr) {
r = 0;
}
if(cw) {
w = 0;
}
// FIXME: Close callback
return 1;
}
//! @decl void create(string data, void|string type, void|int pointer)
//! @seealso
//! @[Stdio.File()->create()]
void create(string _data, void|string type, int|void _ptr) {
if(!_data) error("No data string given to FakeFile.\n");
data = _data;
ptr = _ptr;
mtime = time();
if(type) {
type = lower_case(type);
if(has_value(type, "r"))
r = 1;
if(has_value(type, "w"))
w = 1;
}
else
r = w = 1;
}
protected string make_type_str() {
string type = "";
if(r) type += "r";
if(w) type += "w";
return type;
}
//! @seealso
//! @[Stdio.File()->dup()]
this_program dup() {
return this_program(data, make_type_str(), ptr);
}
//! Always returns 0.
//! @seealso
//! @[Stdio.File()->errno()]
int errno() { return 0; }
//! Returns size and the creation time of the string.
Stdio.Stat stat() {
Stdio.Stat st = Stdio.Stat();
st->size = sizeof(data);
st->mtime=st->ctime=mtime;
st->atime=time();
return st;
}
//! @seealso
//! @[Stdio.File()->line_iterator()]
String.SplitIterator line_iterator(int|void trim) {
if(trim)
return String.SplitIterator( data-"\r", '\n' );
return String.SplitIterator( data, '\n' );
}
protected mixed id;
//! @seealso
//! @[Stdio.File()->query_id()]
mixed query_id() { return id; }
//! @seealso
//! @[Stdio.File()->set_id()]
void set_id(mixed _id) { id = _id; }
//! @seealso
//! @[Stdio.File()->read_function()]
function(:string) read_function(int nbytes) {
return lambda() { return read(nbytes); };
}
//! @seealso
//! @[Stdio.File()->peek()]
int(-1..1) peek(int|float|void timeout) {
if(!r) return -1;
if(ptr >= sizeof(data)) return 0;
return 1;
}
//! Always returns 0.
//! @seealso
//! @[Stdio.File()->query_address()]
string query_address(void|int(0..1) is_local) { return 0; }
//! @seealso
//! @[Stdio.File()->read()]
string read(void|int(0..) len, void|int(0..1) not_all) {
if(!r) return 0;
if (len < 0) error("Cannot read negative number of characters.\n");
int start=ptr;
ptr += len;
if(zero_type(len) || ptr>sizeof(data))
ptr = sizeof(data);
// FIXME: read callback
return data[start..ptr-1];
}
//! @seealso
//! @[Stdio.FILE()->gets()]
string gets() {
if(!r) return 0;
string ret;
sscanf(data,"%*"+(string)ptr+"s%[^\n]",ret);
if(ret)
{
ptr+=sizeof(ret)+1;
if(ptr>sizeof(data))
{
ptr=sizeof(data);
if(!sizeof(ret))
ret = 0;
}
}
// FIXME: read callback
return ret;
}
//! @seealso
//! @[Stdio.FILE()->getchar()]
int getchar() {
if(!r) return 0;
int c;
if(catch(c=data[ptr]))
c=-1;
else
ptr++;
// FIXME: read callback
return c;
}
//! @seealso
//! @[Stdio.FILE()->unread()]
void unread(string s) {
if(!r) return;
if(data[ptr-sizeof(s)..ptr-1]==s)
ptr-=sizeof(s);
else
{
data=s+data[ptr..];
ptr=0;
}
}
//! @seealso
//! @[Stdio.File()->seek()]
int seek(int pos, void|int mult, void|int add) {
if(mult)
pos = pos*mult+add;
if(pos<0)
{
pos = sizeof(data)+pos;
if( pos < 0 )
pos = 0;
}
ptr = pos;
if( ptr > strlen( data ) )
ptr = strlen(data);
return ptr;
}
//! Always returns 1.
//! @seealso
//! @[Stdio.File()->sync()]
int(1..1) sync() { return 1; }
//! @seealso
//! @[Stdio.File()->tell()]
int tell() { return ptr; }
//! @seealso
//! @[Stdio.File()->truncate()]
int(0..1) truncate(int length) {
data = data[..length-1];
return sizeof(data)==length;
}
//! @seealso
//! @[Stdio.File()->write()]
int(-1..) write(string|array(string) str, mixed ... extra) {
if(!w) return -1;
if(arrayp(str)) str=str*"";
if(sizeof(extra)) str=sprintf(str, @extra);
if(ptr==sizeof(data)) {
data += str;
ptr = sizeof(data);
}
else if(sizeof(str)==1)
data[ptr++] = str[0];
else {
data = data[..ptr-1] + str + data[ptr+sizeof(str)..];
ptr += sizeof(str);
}
// FIXME: write callback
return sizeof(str);
}
//! @seealso
//! @[Stdio.File()->set_blocking]
void set_blocking() {
close_cb = 0;
read_cb = 0;
read_oob_cb = 0;
write_cb = 0;
write_oob_cb = 0;
}
//! @seealso
//! @[Stdio.File()->set_blocking_keep_callbacks]
void set_blocking_keep_callbacks() { }
//! @seealso
//! @[Stdio.File()->set_blocking]
void set_nonblocking(function rcb, function wcb, function ccb,
function rocb, function wocb) {
read_cb = rcb;
write_cb = wcb;
close_cb = ccb;
read_oob_cb = rocb;
write_oob_cb = wocb;
}
//! @seealso
//! @[Stdio.File()->set_blocking_keep_callbacks]
void set_nonblocking_keep_callbacks() { }
//! @seealso
//! @[Stdio.File()->set_close_callback]
void set_close_callback(function cb) { close_cb = cb; }
//! @seealso
//! @[Stdio.File()->set_read_callback]
void set_read_callback(function cb) { read_cb = cb; }
//! @seealso
//! @[Stdio.File()->set_read_oob_callback]
void set_read_oob_callback(function cb) { read_oob_cb = cb; }
//! @seealso
//! @[Stdio.File()->set_write_callback]
void set_write_callback(function cb) { write_cb = cb; }
//! @seealso
//! @[Stdio.File()->set_write_oob_callback]
void set_write_oob_callback(function cb) { write_oob_cb = cb; }
//! @seealso
//! @[Stdio.File()->query_close_callback]
function query_close_callback() { return close_cb; }
//! @seealso
//! @[Stdio.File()->query_read_callback]
function query_read_callback() { return read_cb; }
//! @seealso
//! @[Stdio.File()->query_read_oob_callback]
function query_read_oob_callback() { return read_oob_cb; }
//! @seealso
//! @[Stdio.File()->query_write_callback]
function query_write_callback() { return write_cb; }
//! @seealso
//! @[Stdio.File()->query_write_oob_callback]
function query_write_oob_callback() { return write_oob_cb; }
string _sprintf(int t) {
return t=='O' && sprintf("%O(%d,%O)", this_program, sizeof(data),
make_type_str());
}
// FakeFile specials.
//! A FakeFile can be casted to a string.
mixed cast(string to) {
switch(to) {
case "string": return data;
case "object": return this;
}
error("Can not cast object to %O.\n", to);
}
//! Sizeof on a FakeFile returns the size of its contents.
int(0..) _sizeof() {
return sizeof(data);
}
//! @ignore
#define NOPE(X) mixed X (mixed ... args) { error("This is a FakeFile. %s is not available.\n", #X); }
NOPE(assign);
NOPE(async_connect);
NOPE(connect);
NOPE(connect_unix);
NOPE(open);
NOPE(open_socket);
NOPE(pipe);
NOPE(tcgetattr);
NOPE(tcsetattr);
// Stdio.Fd
NOPE(dup2);
NOPE(lock); // We could implement this
NOPE(mode); // We could implement this
NOPE(proxy); // We could implement this
NOPE(query_fd);
NOPE(read_oob);
NOPE(set_close_on_exec);
NOPE(set_keepalive);
NOPE(trylock); // We could implement this
NOPE(write_oob);
//! @endignore