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/* Copyright (c) 1993-2008 by Richard Kelsey and Jonathan Rees.
See file COPYING. */
#include <stdio.h>
#include <stdlib.h> /* for getenv(), etc. (POSIX?/ANSI) */
#include <string.h> /* for strncpy(), etc. (POSIX/ANSI) */
#include <errno.h>
#include <windows.h>
/*
Expanding Windows filenames
Windows Sucks. Unix Sucks. C Sucks.
Richard Kelsey Wed Jan 17 21:40:26 EST 1990 (for the Unix version)
Later rewritten by others who wish to remain anonymous.
Expands ~/ in string `name', leaving the result in `buffer'.
`buffer_len' is the length of `buffer'.
*/
char *s48_expand_file_name (char *name, char *buffer, int buffer_len)
{
char *drive = NULL, *path = NULL, *dir = NULL;
int dir_len;
int name_len = strlen(name);
if ((name_len >= 2) && (name[0] == '~') && ((name[1] == '\\' || (name[1] == '/'))))
{
drive = getenv("HOMEDRIVE");
/* HOMEPATH is usually \.
* I have no idea if it will have trailing \ for a subdirectory.
*/
path = getenv("HOMEPATH");
name += 1;
name_len -= 2;
}
else if ((name_len >= 3) && (name[0] == '%'))
{
char *pos = strchr(name + 2, '%');
if (pos)
{
*pos = '\0';
dir = getenv(name+1);
name = pos + 1;
name_len -= (pos - name) + 1;
}
}
if ((drive && path) || dir)
{
if (drive && path)
dir_len = strlen(drive) + strlen(path);
else
dir_len = strlen(dir);
if ((name_len + dir_len + 1) > buffer_len)
{
fprintf(stderr, "\ns48_expand_file_name: supplied buffer is too small\n");
return(NULL);
};
if (drive && path)
{
int drive_length = strlen(drive);
strcpy(buffer, drive);
strcpy(buffer + drive_length, path);
strcpy(buffer + dir_len, name);
}
else
{
strcpy(buffer, dir);
strcpy(buffer + dir_len, name);
}
}
else
{
if ((name_len + 1) > buffer_len)
{
fprintf(stderr, "\ns48_expand_file_name: supplied buffer is too small\n");
return NULL;
};
strcpy(buffer, name);
}
return(buffer);
}
/* test routine */
/*
main(argc, argv)
int argc;
char *argv[];
{
char buffer[512];
s48_expand_file_name(argv[1], buffer, 512);
printf("%s\n", buffer);
return(0);
}
/* */
/* Driver loop for tail-recursive calls */
long s48_return_value;
long
s48_run_machine(long (*proc) (void))
{
while (proc != 0)
proc = (long (*) (void)) (*proc)();
return s48_return_value;
}
unsigned char *
ps_error_string(long the_errno)
{
DWORD id = the_errno;
/* the VM is responsible for copying this */
static char buf[512];
for (;;)
{
if (FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM,
NULL, /* lpSource */
(DWORD) id,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
buf, sizeof(buf)-1,
NULL)) /* arguments ... */
return buf;
else
/* risky, but we assume some amount of sanity on the side of
the Windows implementors---haha */
id = GetLastError();
}
}
/* Getting the length of a file. */
long
s48_get_file_size(unsigned char *name)
{
HANDLE handle = CreateFile(name, 0, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (handle == INVALID_HANDLE_VALUE)
return -1;
{
DWORD dwSize = GetFileSize(handle, NULL);
CloseHandle(handle);
if (dwSize == 0xFFFFFFFF)
return -1;
else
return (long) dwSize;
}
}
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