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/* valaccodeconstant.vala
*
* Copyright (C) 2006-2010 Jürg Billeter
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Author:
* Jürg Billeter <j@bitron.ch>
*/
using GLib;
/**
* A constant C expression.
*/
public class Vala.CCodeConstant : CCodeExpression {
/**
* The name of this constant.
*/
public string name { get; set; }
public CCodeConstant (string _name) {
name = _name;
}
const int LINE_LENGTH = 70;
public CCodeConstant.string (string _name) {
assert (_name[0] == '\"');
if (_name.length <= LINE_LENGTH) {
name = _name;
return;
}
var builder = new StringBuilder ("\"");
char* p = _name;
char* end = p + _name.length;
// remove quotes
p++;
end--;
int col = 0;
while (p < end) {
if (col >= LINE_LENGTH) {
builder.append ("\" \\\n\"");
col = 0;
}
if (*p == '\\') {
char* begin_of_char = p;
builder.append_c (p[0]);
builder.append_c (p[1]);
p += 2;
switch (p[-1]) {
case 'x':
// hexadecimal character
while (p < end && p->isxdigit ()) {
builder.append_c (*p);
p++;
}
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
// octal character
while (p < end && p - begin_of_char <= 3 && *p >= '0' && *p <= '7') {
builder.append_c (*p);
p++;
}
break;
case 'n':
// break line at \n
col = LINE_LENGTH;
break;
}
col += (int) (p - begin_of_char);
} else {
builder.append_unichar (((string) p).get_char ());
p += ((char*) ((string) p).next_char () - p);
col++;
}
}
builder.append_c ('"');
this.name = builder.str;
}
public override void write (CCodeWriter writer) {
writer.write_string (name);
}
}
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