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/*
* Generates an 8-bit character set table from a .TXT file as found on
* ftp.unicode.org.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
int main (int argc, char *argv[])
{
const char* charsetname;
const char* filename;
const char* directory;
char* c_charsetname;
int charset2uni[0x100];
if (argc != 3 && argc != 4)
exit(1);
charsetname = argv[1];
filename = argv[2];
directory = (argc > 3 ? argv[3] : "");
fprintf(stderr, "Creating %s%s\n", directory, filename);
{
int i, c;
/* Read a unicode.org style .TXT file. */
for (i = 0; i < 0x100; i++)
charset2uni[i] = 0xfffd;
for (;;) {
c = getc(stdin);
if (c == EOF)
break;
if (c == '\n' || c == ' ' || c == '\t')
continue;
if (c == '#') {
do { c = getc(stdin); } while (!(c == EOF || c == '\n'));
continue;
}
ungetc(c,stdin);
if (scanf("0x%x", &i) != 1 || !(i >= 0 && i < 0x100))
exit(1);
do { c = getc(stdin); } while (c == ' ' || c == '\t');
if (c != EOF)
ungetc(c,stdin);
if (c == '\n' || c == '#')
continue;
if (scanf("0x%x", &charset2uni[i]) != 1)
exit(1);
}
}
/* Write the output file. */
{
FILE* f;
bool pages[0x100];
int i, i1, i2, i3, j, j1, j2, p, p1, p2;
{
char* fname = malloc(strlen(directory)+strlen(filename)+1);
strcpy(fname,directory); strcat(fname,filename);
f = fopen(fname,"w");
if (f == NULL)
exit(1);
}
c_charsetname = strdup(charsetname);
for (i = 0; i < strlen(c_charsetname); i++)
if (c_charsetname[i] == '-')
c_charsetname[i] = '_';
fprintf(f, "/*\n");
fprintf(f, " * nls_%s.c\n", charsetname);
fprintf(f, " *\n");
fprintf(f, " * Charset %s translation tables.\n", charsetname);
fprintf(f, " * Generated automatically by the nls_table utility.\n");
fprintf(f, " */\n");
fprintf(f, "\n");
fprintf(f, "#define charset2uni %s_charset2uni\n", c_charsetname);
fprintf(f, "\n");
fprintf(f, "static const unsigned short charset2uni[256] = {\n");
for (i1 = 0; i1 < 16; i1++) {
fprintf(f, " /* 0x%02x */\n", 16*i1);
for (i2 = 0; i2 < 2; i2++) {
fprintf(f, " ");
for (i3 = 0; i3 < 8; i3++) {
if (i3 > 0)
fprintf(f, " ");
i = 16*i1 + 8*i2 + i3;
j = charset2uni[i];
fprintf(f, "0x%04x%s", j, i<255?",":" ");
}
fprintf(f, "\n");
}
}
fprintf(f, "};\n");
fprintf(f, "\n");
for (i = 0; i < 0x100; i++)
pages[i] = false;
for (i = 0; i < 0x100; i++)
if (charset2uni[i] != 0xfffd)
pages[charset2uni[i]>>8] = true;
fprintf(f, "#define uni2charset %s_uni2charset\n", c_charsetname);
for (p = 0; p < 0x100; p++)
if (pages[p])
fprintf(f, "#define page%02x %s_page%02x\n", p, c_charsetname, p);
fprintf(f, "\n");
for (p = 0; p < 0x100; p++)
if (pages[p]) {
fprintf(f, "static const unsigned char page%02x[256] = {\n", p);
for (j1 = 0; j1 < 32; j1++) {
fprintf(f, " ");
for (j2 = 0; j2 < 8; j2++) {
j = 256*p + 8*j1 + j2;
if (j != 0xfffd) {
for (i = 0; i < 256; i++)
if (charset2uni[i] == j)
break;
if (i == 256)
i = 0;
} else
i = 0;
fprintf(f, "0x%02x%s ", i, 8*j1+j2<255?",":" ");
}
fprintf(f, "/* 0x%02x-0x%02x */\n", 8*j1, 8*j1+7);
}
fprintf(f, "};\n");
fprintf(f, "\n");
}
fprintf(f, "static const unsigned char * const uni2charset[256] = {\n");
for (p1 = 0; p1 < 32; p1++) {
fprintf(f, " ");
for (p2 = 0; p2 < 8; p2++) {
p = 8*p1 + p2;
if (pages[p])
fprintf(f, "page%02x", p);
else
fprintf(f, "nopage");
fprintf(f, "%s ", p<255?",":" ");
}
fprintf(f, "\n");
}
fprintf(f, "};\n");
fprintf(f, "\n");
for (p = 0x100-1; p >= 0; p--)
if (pages[p])
fprintf(f, "#undef page%02x\n", p);
fprintf(f, "\n");
fprintf(f, "struct nls_table nls_%s_table = {\n", c_charsetname);
fprintf(f, " \"%s\",\n", charsetname);
fprintf(f, " uni2charset,\n");
fprintf(f, " charset2uni,\n");
{
bool is_ascii_extension = true;
for (i = 0; i < 128; i++)
if (charset2uni[i] != i) {
is_ascii_extension = false;
break;
}
fprintf(f, " %s\n", is_ascii_extension?"1":"0");
}
fprintf(f, "};\n");
fprintf(f, "\n");
fprintf(f, "#undef uni2charset\n");
fprintf(f, "#undef charset2uni\n");
fprintf(f, "\n");
if (ferror(f) || fclose(f))
exit(1);
}
exit(0);
}
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