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/*
* VBSF - generate C file with codepage -> unicode tables based on uni*.tbl files
* Copyright (C) 2022 Javier S. Pedro
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <libgen.h>
#include <ctype.h>
#include <string.h>
/** size of codepage -> unicode table */
#define TBL_SIZE 128 /* in 16bit words */
/** maximum number of codepages in the same C file */
#define MAX_CPS 32
static FILE *fout;
static unsigned all_cps[MAX_CPS] = {0};
static unsigned num_cps = 0;
static void print_table(const uint16_t *table, unsigned cp)
{
int i;
int col = 0;
fprintf(fout, "static const uint16_t cp%utbl[%u] = {\n ", cp, TBL_SIZE);
for (i = 0; i < TBL_SIZE; i++)
{
if (col)
{
fprintf(fout, ", ");
}
if (col >= 8)
{
fprintf(fout, "\n ");
col = 0;
}
fprintf(fout, "0x%04X", table[i]);
col++;
}
fprintf(fout, "\n};\n\n");
}
static int process_table(FILE *fp, const char *base, unsigned cp)
{
char buffer[TBL_SIZE*2];
int err;
// Read "Description of table" (terminated by \r\n)
if (!fgets(buffer, sizeof(buffer), fp)) {
return -1;
}
fprintf(fout, "// %s", buffer);
// Read "Table format designator" (currently only format 1 is supported)
err = fread(buffer, 1, 1, fp);
if (err != 1 || buffer[0] != 1) {
return -1;
}
// Now read the actual table (256 bytes in format 1)
if ((err = fread(buffer, 1, sizeof(buffer), fp)) != sizeof(buffer)) {
return -1;
}
print_table((const uint16_t *)buffer, cp);
all_cps[num_cps++] = cp;
return 0;
}
static int process_file(char *filename)
{
FILE *fp = fopen(filename, "rb");
char *base = basename(filename);
unsigned cp = 0;
if (!fp) {
fprintf(stderr, "Cannot open file '%s'\n", filename);
return -1;
}
if (strnicmp(&base[0], "CP", 2) == 0
&& isdigit(base[2]) && isdigit(base[3]) && isdigit(base[4])
&& strnicmp(&base[5], "UNI.TBL", 7) == 0) {
cp = atoi(&base[2]);
} else if (strnicmp(&base[0], "C", 2) == 0
&& isdigit(base[1]) && isdigit(base[2]) && isdigit(base[3]) && isdigit(base[4])
&& strnicmp(&base[5], "UNI.TBL", 7) == 0) {
cp = atoi(&base[1]);
}
if (!cp) {
fprintf(stderr, "Cannot guess codepage number from filename '%s'\n", base);
fclose(fp);
return -1;
}
if (process_table(fp, base, cp) != 0) {
fprintf(stderr, "Cannot read table format from '%s'\n", base);
fclose(fp);
return -1;
}
fclose(fp);
return 0;
}
#ifdef __UNIX__
// no need to process wildcards on UNIX
static int process_arg(char *arg)
{
return process_file(arg);
}
#else
#include <io.h>
static int process_arg(char *arg)
{
struct _finddata_t fileinfo;
intptr_t fh = _findfirst(arg, &fileinfo);
if (!fh) {
fprintf(stderr, "Cannot find '%s'\n", arg);
return -1;
}
do {
// Name of file in fileinfo will be without path
// If so copy the path from the arg
char namebuf[_MAX_PATH];
char *s;
if ((s = strrchr(arg, '\\')) || (s = strrchr(arg, '/')) || (s = strrchr(arg, ':'))) {
memcpy(namebuf, arg, s-arg+1);
strcpy(namebuf + (s-arg) +1, fileinfo.name);
} else {
strcpy(namebuf, fileinfo.name);
}
if (process_file(namebuf) != 0) {
return -1;
}
} while (_findnext(fh, &fileinfo) == 0);
return 0;
}
#endif
int main(int argc, char **argv)
{
int i;
if (argc < 3)
{
fprintf(stderr,
"Usage: bin2c <output c file> <unitbl/*.tbl>\n");
return 1;
}
fout = fopen(argv[1], "wt");
fprintf(fout, "#include <stdint.h>\n");
for (i = 2; i < argc; i++) {
if (process_arg(argv[i])) {
return EXIT_FAILURE;
}
}
fprintf(fout, "static const uint16_t * get_uni_tbl(unsigned cp) {\n");
fprintf(fout, " switch (cp) {\n");
for (i = 0; i < num_cps; i++) {
unsigned cp = all_cps[i];
fprintf(fout, " case %u:\n", cp);
fprintf(fout, " return cp%utbl;\n", cp);
}
fprintf(fout, " default:\n");
fprintf(fout, " return 0;\n");
fprintf(fout, " }\n");
fprintf(fout, "}\n\n");
fclose(fout);
printf("Processed %u tables\n", num_cps);
return EXIT_SUCCESS;
}
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