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/* Functions that emulate UNIX catgets */
/* Kitten version 2021 by Tom Ehlert, */
/*
This software is free software; free to use,
modify, pass to others, whatever
use it at your own risk
*/
/* Minor modifications to use internal static buffer to keep API compatible
* with regular kitten. */
#ifndef NO_KITTEN
#include <stdio.h> /* sprintf */
#include <stdlib.h> /* getenv */
#include <io.h> /* sprintf */
#include <fcntl.h> /* sprintf */
#include <string.h> /* sprintf */
#include "kitten.h"
#include "kittenc.h"
/* Globals */
static char global_nls_buffer[4096] = {0};
/* Functions */
/**
* On success, catgets() returns a pointer to an internal
* buffer area containing the null-terminated message string.
* On failure, catgets() returns the value 'message'.
*/
const char *
_kittengets (int msgID, const char *message)
{
struct message_header *message_header; // if this is != 0 then init was done
if (global_nls_buffer[0] == 0)
return message;
message_header = (struct message_header *)global_nls_buffer;
for ( ; message_header->len != 0; message_header = (struct message_header *)((char*)message_header + message_header->len))
{
if (message_header->id== msgID)
{
return (const char*)message_header + sizeof(struct message_header);
}
}
return message;
}
/**
* Initialize kitten for program (name).
*/
#define _toupper(c) (c & ~0x20)
nl_catd
kittenopen (const char *name)
{
int fd;
struct message_end message_end;
struct content content[KITTEN_MAX_RESOURCES];
char *language;
int i;
long len;
char exename[_MAX_PATH];
long fileendnow, seekoffset;
//printf("kittenopen %s\n", name);
if ((fd = open(name, _O_RDONLY | _O_BINARY)) < 0)
{
sprintf(exename, "%s.exe", name);
if ((fd = open(exename, _O_RDONLY | _O_BINARY)) < 0)
{
printf("can't open %s\n", name); // should never happen
return 0;
}
}
fileendnow = lseek(fd, 0, SEEK_END);
lseek(fd, - (int)sizeof(struct message_end), SEEK_END);
read(fd, &message_end, sizeof(struct message_end));
if (memcmp(message_end.ID, "KITTENC", 8) != 0)
{
//printf("no KITTENC record found\n");
return 0;
}
if (message_end.resource_count > KITTEN_MAX_RESOURCES)
{
printf("resource > %d\n", KITTEN_MAX_RESOURCES);
return 0;
}
seekoffset = fileendnow - message_end.fileend_orig;
if (lseek(fd, message_end.filepos+seekoffset, SEEK_SET) != message_end.filepos+seekoffset)
{
printf("can't seek 1\n");
return 0;
}
read(fd, &content, sizeof(content[0]) * message_end.resource_count);
language = getenv("LANG");
// printf("using language %s\n", language);
if (message_end.resource_count == 1)
{
if (language &&
_toupper(language[0]) == 'E' &&
_toupper(language[0]) == 'N')
{
// set LANG=EN switches to internal strings
close(fd);
return 0;
}
// otherwise use the only compiled language
i = 0;
goto found_my_language;
}
if (language == NULL) // language not found
{ // use internal strings
close(fd);
return 0;
}
// see if we find our language in the existing resources
for (i = 0; i < message_end.resource_count; i++)
{
if(_toupper(content[i].language[0]) == _toupper(language[0]) &&
_toupper(content[i].language[1]) == _toupper(language[1]))
{
goto found_my_language;
}
}
// language not found
close(fd);
return 0;
found_my_language:
// found our language
// printf(" language %s found between %lx and %lx\n", language, content[i].filepos_start, content[i].filepos_end);
// printf("seek %lu --> %lu\n", content[i].filepos_start, content[i].filepos_start+seekoffset);
lseek(fd, content[i].filepos_start+seekoffset, SEEK_SET);
len = content[i].filepos_end - content[i].filepos_start;
if (len > sizeof(global_nls_buffer))
{
printf("nls_buffer too small(%d). we need at least %l\n",
sizeof(global_nls_buffer), len);
close(fd);
return 1;
}
read(fd, global_nls_buffer, (int)len);
close(fd);
return 0;
}
#endif /*NO_KITTEN */
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