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/**
* Program to print the character set conversion tables for a particular
* characters set. Examines the output of "native2ascii".
*
* @author Bruno Haible
*/
import java.io.*;
public class nls_table {
static String toHexString1 (int i) {
return new String(new char[] { "0123456789abcdef".charAt(i) });
}
static String toHexString2 (int i) {
return toHexString1((i>>4)&0x0f)
+toHexString1(i&0x0f);
}
static String toHexString4 (int i) {
return toHexString1((i>>12)&0x0f)
+toHexString1((i>>8)&0x0f)
+toHexString1((i>>4)&0x0f)
+toHexString1(i&0x0f);
}
public static void main (String[] args) throws IOException {
if (args.length != 1 && args.length != 2)
System.exit(1);
String filename = args[0];
String directory = (args.length > 1 ? args[1] : "");
System.out.println("Creating "+directory+filename);
String charsetname = filename.substring(0,filename.length()-2).substring(4).replace('_','-');
int[] charset = new int[256];
// Analyze the input.
{
DataInputStream stream = new DataInputStream(System.in);
for (int i = 0; i < 256; i++) {
int j;
if (i == 10 || i == 13)
j = i;
else {
String l = stream.readLine();
if (l.length() == 1)
j = (int)l.charAt(0);
else if (l.length() == 6 && l.charAt(0) == '\\' && l.charAt(1) == 'u')
j = Integer.valueOf(l.substring(2),16).intValue();
else {
System.err.println("unknown translation for character "+i);
j = 0;
}
}
charset[i] = j;
}
stream.close();
}
// Print the output file.
{
FileOutputStream fstream = new FileOutputStream(directory+filename);
PrintStream stream = new PrintStream(fstream);
stream.println("/*");
stream.println(" * nls_"+charsetname+".c");
stream.println(" *");
stream.println(" * Charset "+charsetname+" translation tables.");
stream.println(" * Generated automatically by the nls_table utility.");
stream.println(" */");
stream.println();
stream.println("#define charset2uni "+charsetname.replace('-','_')+"_charset2uni");
stream.println();
stream.println("static const unsigned short charset2uni[256] = {");
for (int i1 = 0; i1 < 16; i1++) {
stream.println(" /* 0x"+toHexString2(16*i1)+" */");
for (int i2 = 0; i2 < 2; i2++) {
stream.print(" ");
for (int i3 = 0; i3 < 8; i3++) {
if (i3 > 0)
stream.print(" ");
int i = 16*i1 + 8*i2 + i3;
int j = charset[i];
stream.print("0x"+toHexString4(j)+(i<255?",":" "));
}
stream.println();
}
}
stream.println("};");
stream.println();
boolean[] pages = new boolean[256];
for (int i = 0; i < 256; i++)
if (charset[i] != 0xfffd)
pages[charset[i]>>8] = true;
stream.println("#define uni2charset "+charsetname.replace('-','_')+"_uni2charset");
for (int p = 0; p < 256; p++)
if (pages[p])
stream.println("#define page"+toHexString2(p)+" "+charsetname.replace('-','_')+"_page"+toHexString2(p));
stream.println();
for (int p = 0; p < 256; p++)
if (pages[p]) {
stream.println("static const unsigned char page"+toHexString2(p)+"[256] = {");
for (int j1 = 0; j1 < 32; j1++) {
stream.print(" ");
for (int j2 = 0; j2 < 8; j2++) {
int j = 256*p + 8*j1 + j2;
int i;
if (j != 0xfffd) {
for (i = 0; i < 256; i++)
if (charset[i] == j)
break;
if (i == 256)
i = 0;
} else
i = 0;
stream.print("0x"+toHexString2(i)+(8*j1+j2<255?",":" ")+" ");
}
stream.println("/* 0x"+toHexString2(8*j1)+"-0x"+toHexString2(8*j1+7)+" */");
}
stream.println("};");
stream.println();
}
stream.println("static const unsigned char * const uni2charset[256] = {");
for (int p1 = 0; p1 < 32; p1++) {
stream.print(" ");
for (int p2 = 0; p2 < 8; p2++) {
int p = 8*p1 + p2;
if (pages[p])
stream.print("page"+toHexString2(p));
else
stream.print("nopage");
stream.print((p<255?",":" ")+" ");
}
stream.println();
}
stream.println("};");
stream.println();
for (int p = 255; p >= 0; p--)
if (pages[p])
stream.println("#undef page"+toHexString2(p));
stream.println();
stream.println("struct nls_table nls_"+charsetname.replace('-','_')+"_table = {");
stream.println(" \""+charsetname+"\",");
stream.println(" uni2charset,");
stream.println(" charset2uni,");
{
boolean is_ascii_extension = true;
for (int i = 0; i < 128; i++)
if (charset[i] != i) {
is_ascii_extension = false;
break;
}
stream.println(" "+(is_ascii_extension?"1":"0"));
}
stream.println("};");
stream.println();
stream.println("#undef uni2charset");
stream.println("#undef charset2uni");
stream.println();
stream.close();
fstream.close();
}
System.exit(0);
}
}
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