Hi, I'm having troubles to compile the vala file attached to this e-mail. The command line is:
valac --pkg=gio-2.0 --pkg=glib-2.0 email.vala
When the lines containing `buffer += c` are commented out (lines 67 and
70), the program compiles.
I use vala 0.9.3 as packaged by the Fedora distribution.
The vala compiler gives me the following errors:
----------------------------------------------------------------------
email.vala:25.13-25.37: warning: unhandled error `GLib.Error'
if (parent.read (&c, 1, null) == 0){
^^^^^^^^^^^^^^^^^^^^^^^^^
email.vala:41.5-41.32: warning: method
`Email.EmailInputStream.push_back_buffer' never used
public void push_back_buffer (uint8[] buffer) {
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
email.vala:51.5-51.25: warning: method
`Email.EmailInputStream.read_line' never used
public bool read_line(ref uint8[] buffer){
^^^^^^^^^^^^^^^^^^^^^
**
ERROR:valaccodearraymodule.c:1407:vala_ccode_array_module_real_get_array_size_cexpression:
code should not be reached
zsh: abort (core dumped) valac --pkg=gio-2.0 --pkg=glib-2.0 email.vala
----------------------------------------------------------------------
Apparently, this is an assertion failure in the compiler code that
causes this error.
What do you think of this error? Am I doing wrong things?
By the way, I couldn't find any reference on the built-in operations
available on the vala arrays (buffer.length, buffer.resize(int), buffer
+=, ...)
Where do you think I could find documentation on that ?
Note: I'm using uint8[] instead of string because I just want to
manipulate a stream of bytes that very often looks like a string. I
don't want to deal with encoding problems. Is there a better solution?
Thanks.
Mildred
--
Mildred Ki'Lya
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using GLib;
namespace Email {
class EmailInputStream : Object {
private InputStream parent;
public EmailInputStream(InputStream parent) {
this.parent = parent;
}
public bool eof { get; private set; default = false; }
private uint8[] push_back = {};
private bool push_back_eof = false;
public bool read_char(out uint8 c){
if (push_back.length > 0) {
c = push_back[push_back.length - 1];
push_back.length--;
if(push_back.length == 0) {
eof = push_back_eof;
}
} else {
if (parent.read (&c, 1, null) == 0){
eof = true;
return false;
}
}
return true;
}
public void unread_char(uint8 c){
if (push_back.length == 0){
push_back_eof = eof;
eof = false;
}
push_back += c;
}
public void push_back_buffer (uint8[] buffer) {
if (buffer.length > 0 && push_back.length == 0){
push_back_eof = eof;
eof = false;
}
for(int i = buffer.length - 1; i >= 0; --i){
push_back += buffer[i];
}
}
public bool read_line(ref uint8[] buffer){
uint8 c;
uint8 CR = 0x0D;
uint8 LF = 0x0A;
bool crlf = false;
buffer.resize(0);
while (read_char(out c)) {
//
// CRLF management:
//
// ?? LF -> append, break
// ?? CR -> append, wait for the LF
// CR LF -> append, break
// CR ?? -> push back, break
// ?? ?? -> append, continue
//
if (c == LF) { buffer += c; break; }
if (crlf) { unread_char(c); break; }
if (c == CR) { crlf = true; }
buffer += c;
}
return !eof;
}
}
}
static void main(string[] args) {
stdout.puts("Hello\n");
}
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