/* Copies one file to another (both specified by path). Dynamically
* allocates memory for the file buffer. Returns TRUE if successful,
* or FALSE if unsuccessful. This function uses _dos_ functions only;
* standard C functions are not used.
*/
BOOL fastcopy( HANDLE hfSrcParm, HANDLE hfDstParm )
{
char _far *buf = NULL;
unsigned segbuf, count;
/* Attempt to dynamically allocate all of memory (0xffff paragraphs).
* This will fail, but will return the amount actually available
* in segbuf. Then allocate this amount.
*/
if (_dos_allocmem( 0xffff, &segbuf ) ) {
count = segbuf;
if(_dos_allocmem( count, &segbuf ) )
return FALSE;
}
FP_SEG( buf ) = segbuf;
/* Read and write until there is nothing left. */
while( count )
{
/* Read and write input. */
if( (_dos_read( hfSrcParm, buf, count, &count )) ){
_dos_freemem( segbuf );
return FALSE;
}
if( (_dos_write( hfDstParm, buf, count, &count )) ){
_dos_freemem( segbuf );
return FALSE;
}
}
/* Free memory. */
_dos_freemem( segbuf );
return TRUE;
}
void init_floppyio(void)
{
int status;
ticktimer = 0x00;
intflag = 0x00;
time_tick_count = 0x00;
memset(§or_buf,0,512);
status = chs_biosdisk(_DISK_RESET,0, 0, 255,0, 1, §or_buf);
if(status)
hxc_printf(0,"FDC Reset error : Return value %d\n",status);
prev_floppy_int = _dos_getvect( 8+0x6 );
_dos_setvect( 8+0x6, floppy_interrupt_handler );
prev_timer_int = _dos_getvect( 8+0x0 );
_dos_setvect( 8+0x0, timer_interrupt_handler );
if(_dos_allocmem( 32768/16, &dmabuf_seg_rd ))
{
hxc_printf(0,"Alloc Error !\n");
for(;;);
}
bufrd = (unsigned char *)MK_FP(dmabuf_seg_rd, 0);
if(_dos_allocmem( 32768/16, &dmabuf_seg_wr ))
{
hxc_printf(0,"Alloc Error !\n");
for(;;);
}
bufwr = (unsigned char *)MK_FP(dmabuf_seg_wr, 0);
reset_drive(0);
}
void main( void )
{
#if defined(__NT__) || \
( defined(__OS2__) && \
(defined(__386__) || defined(__PPC__)) )
void *segment;
#else
unsigned segment;
#endif
/* Try to allocate 100 paragraphs, then free them */
if( _dos_allocmem( 100, &segment ) != 0 ) {
printf( "_dos_allocmem failed\n" );
printf( "Only %u paragraphs available\n",
segment );
} else {
printf( "_dos_allocmem succeeded\n" );
if( _dos_freemem( segment ) != 0 ) {
printf( "_dos_freemem failed\n" );
} else {
printf( "_dos_freemem succeeded\n" );
}
}
}
_WCRTLINK int __F_NAME(spawnve,_wspawnve)( int mode, const CHAR_TYPE * path,
const CHAR_TYPE * const argv[], const CHAR_TYPE * const in_envp[] )
{
const CHAR_TYPE * const *envp = (const CHAR_TYPE * const *)in_envp;
CHAR_TYPE *envmem;
CHAR_TYPE *envstrings;
unsigned envseg;
int len;
CHAR_TYPE SPVE_NEAR *np;
CHAR_TYPE SPVE_NEAR *p;
CHAR_TYPE SPVE_NEAR *end_of_p;
int retval;
int num_of_paras; /* for environment */
size_t cmdline_len;
CHAR_TYPE SPVE_NEAR *cmdline_mem;
CHAR_TYPE SPVE_NEAR *cmdline;
CHAR_TYPE switch_c[4];
CHAR_TYPE prot_mode286;
#if defined( __DOS__ )
auto _87state _87save;
#endif
CHAR_TYPE *drive;
CHAR_TYPE *dir;
CHAR_TYPE *fname;
CHAR_TYPE *ext;
int rc;
#if defined( __DOS__ ) && defined( _M_I86 )
#define ENVPARM envseg
#else
#define ENVPARM envmem
#endif
#ifdef __USE_POSIX_HANDLE_STRINGS
CHAR_TYPE **newEnvp;
int count;
CHAR_TYPE *fileinfo;
int doFreeFlag = 0;
if( _fileinfo != 0 ) {
fileinfo = __F_NAME(__FormPosixHandleStr,__wFormPosixHandleStr)();
if( fileinfo != NULL ) {
count = 1;
if( envp != NULL ) {
newEnvp = (CHAR_TYPE **)envp;
while( *newEnvp != NULL ) { /* count 'em, including NULL */
newEnvp++;
count++;
}
}
count++; /* one more for the new entry */
newEnvp = lib_malloc( count * sizeof(CHAR_TYPE*) );
if( newEnvp != NULL ) {
if( envp != NULL ) {
memcpy( newEnvp, envp, (count-1)*sizeof(CHAR_TYPE*) );
}
newEnvp[count-2] = fileinfo;/* add C_FILE_INFO entry */
newEnvp[count-1] = NULL; /* terminate pointer list */
envp = (const CHAR_TYPE **)newEnvp;/* use new environment */
doFreeFlag = 1; /* do cleanup on exit */
} else {
lib_free( fileinfo );
}
}
}
#endif
#if defined(__386__) || defined(__AXP__) || defined(__PPC__)
prot_mode286 = FALSE;
#if defined(__OS2__) || defined(__NT__)
if( mode == OLD_P_OVERLAY ) {
rc = __F_NAME(execve,_wexecve)(path, argv, envp);
_POSIX_HANDLE_CLEANUP;
return( rc );
}
#endif
#if defined( __DOS__ )
if( mode >= OLD_P_OVERLAY ) {
__set_errno( EINVAL );
rc = -1;
_POSIX_HANDLE_CLEANUP;
return( rc );
}
#endif
#else
#if defined( __OS2__ )
prot_mode286 = _RWD_osmode;
if( mode == OLD_P_OVERLAY ) {
rc = execve(path, argv, envp);
_POSIX_HANDLE_CLEANUP;
return( rc );
}
#else
prot_mode286 = FALSE;
if( mode == OLD_P_OVERLAY ) {
execveaddr_type execve;
execve = __execaddr();
if( execve != NULL ) {
rc = (*execve)( path, argv, envp );
_POSIX_HANDLE_CLEANUP;
return( rc );
}
__set_errno( EINVAL );
_POSIX_HANDLE_CLEANUP;
return( -1 );
}
#endif
#endif
retval = __F_NAME(__cenvarg,__wcenvarg)( argv, envp, &envmem,
&envstrings, &envseg,
&cmdline_len, FALSE );
if( retval == -1 ) {
_POSIX_HANDLE_CLEANUP;
return( -1 );
}
num_of_paras = retval;
len = __F_NAME(strlen,wcslen)( path ) + 7 + _MAX_PATH2;
np = LIB_ALLOC( len * sizeof( CHAR_TYPE ) );
if( np == NULL ) {
p = (CHAR_TYPE SPVE_NEAR *)alloca( len*sizeof(CHAR_TYPE) );
if( p == NULL ) {
lib_free( envmem );
_POSIX_HANDLE_CLEANUP;
return( -1 );
}
} else {
p = np;
}
__F_NAME(_splitpath2,_wsplitpath2)( path, p + (len-_MAX_PATH2),
&drive, &dir, &fname, &ext );
#if defined( __DOS__ )
_RWD_Save8087( &_87save );
#endif
#if defined( __DOS__ ) && defined( _M_I86 )
if( _osmode != DOS_MODE ) { /* if protect-mode e.g. DOS/16M */
unsigned segment;
if( _dos_allocmem( num_of_paras, &segment ) != 0 ) {
lib_nfree( np );
lib_free( envmem );
_POSIX_HANDLE_CLEANUP;
return( -1 );
}
envseg = segment;
_fmemcpy( MK_FP( segment, 0 ), envstrings, num_of_paras * 16 );
}
#endif
/* allocate the cmdline buffer */
cmdline_mem = LIB_ALLOC( cmdline_len * sizeof( CHAR_TYPE ) );
if( cmdline_mem == NULL ) {
cmdline = (CHAR_TYPE SPVE_NEAR *)alloca( cmdline_len*sizeof(CHAR_TYPE) );
if( cmdline == NULL ) {
retval = -1;
__set_errno( E2BIG );
__set_doserrno( E_badenv );
goto cleanup;
}
} else {
cmdline = cmdline_mem;
}
#if !defined( __OS2__ ) && !defined(__NT__)
if( _RWD_osmajor >= 3 ) { /* 17-oct-88, check version #
* 'append' program in DOS has a bug, so we avoid it by putting '.\'
* on the front of a filename that doesn't have a path or drive
*/
if( drive[0] == 0 && dir[0] == 0 ) {
dir = ".\\";
}
}
#endif
__F_NAME(_makepath,_wmakepath)( p, drive, dir, fname, ext );
__set_errno( ENOENT );
if( ext[0] != '\0' ) {
#if defined( __OS2__ )
if( stricmp( ext, ".cmd" ) == 0 || stricmp( ext, ".bat" ) == 0 )
#else
if( __F_NAME(stricmp,wcscmp)( ext, __F_NAME(".bat",L".bat") ) == 0 )
#endif
{
retval = -1; /* assume file doesn't exist */
if( file_exists( p ) ) goto spawn_command_com;
} else {
__set_errno( 0 );
/* user specified an extension, so try it */
retval = x_dospawn( mode, p, cmdline, ENVPARM, argv );
}
}
#if defined( __OS2__ ) || defined( __NT__ )
/*
* consider the following valid executable filenames:
* a.b.exe a.cmd.exe a.exe.cmd a.cmd
* we must always try to add .exe, etc.
*/
if( _RWD_errno == ENOENT || _RWD_errno == EINVAL ) {
#else
else {
#endif
end_of_p = p + __F_NAME(strlen,wcslen)( p );
if( prot_mode286 ) {
__set_errno( ENOENT );
} else {
__F_NAME(strcpy,wcscpy)( end_of_p, __F_NAME(".com",L".com") );
__set_errno( 0 );
retval = x_dospawn( mode, p, cmdline, ENVPARM, argv );
}
if( _RWD_errno == ENOENT || _RWD_errno == EINVAL ) {
__set_errno( 0 );
__F_NAME(strcpy,wcscpy)( end_of_p, __F_NAME(".exe",L".exe") );
retval = x_dospawn( mode, p, cmdline, ENVPARM, argv );
if( _RWD_errno == ENOENT || _RWD_errno == EINVAL ) {
/* try for a .BAT file */
__set_errno( 0 );
#if defined( __OS2__ )
strcpy( end_of_p, ".cmd" );
if( !file_exists( p ) )
strcpy( end_of_p, ".bat" );
#else
__F_NAME(strcpy,wcscpy)( end_of_p, __F_NAME(".bat",L".bat") );
#endif
if( file_exists( p ) ) {
spawn_command_com:
/* the environment will have to be reconstructed */
lib_free( envmem );
envmem = NULL;
__F_NAME(__ccmdline,__wccmdline)( p, argv, cmdline, 1 );
#ifdef __WIDECHAR__
retval = _wspawnl( mode, _wgetenv(L"COMSPEC"),
prot_mode286 ? L"CMD" : L"COMMAND",
__wSlash_C( switch_c, prot_mode286 ),
p, cmdline, NULL );
#else
retval = spawnl( mode, getenv("COMSPEC"),
prot_mode286 ? "CMD" : "COMMAND",
__Slash_C( switch_c, prot_mode286 ),
p, cmdline, NULL );
#endif
}
}
}
}
cleanup:
_POSIX_HANDLE_CLEANUP;
LIB_FREE( cmdline_mem );
LIB_FREE( np );
lib_free( envmem );
#if !defined(__OS2__) && defined( _M_I86 )
if( _osmode != DOS_MODE ) { /* if protect-mode e.g. DOS/16M */
_dos_freemem( envseg );
}
#endif
#if defined( __DOS__ )
_RWD_Rest8087( &_87save );
#endif
return( retval );
}
static void _dos_freemem_wrap(void far *x) {
if (x != NULL) _dos_freemem(FP_SEG(x));
}
static void far *_dos_allocmem_wrap(unsigned long sz) {
unsigned segs,res,err;
if (sz >= 0xBFFFFUL)
return NULL;
if (sz != 0)
segs = (unsigned)((sz + 0xFUL) >> 4UL);
else
segs = 1;
err = _dos_allocmem(segs,&res);
if (err != 0)
return NULL;
return MK_FP(res,0);
}
#endif
/* one bit per channel that is 16-bit AND requires address shift (lower 16 bits >> 1) AND the counter is # of WORDs */
/* in the original implementation we take the lower 16 bits and shift right by 1 for WORD transfers,
* the later Intel chipsets allow for 8, 16 & 32-bit transfers on any channel with or without
* the 16-bit address shift, which is why this is a variable not a const */
unsigned char d8237_16bit_ashift = 0xF0;
static int d8237_readwrite_test4(unsigned int bch) {
int j,i;
int exeload_load_fd(struct exeload_ctx *exe,const int fd/*must be open, you must lseek to EXE header*/) {
struct exe_dos_header *header;
unsigned char *hdr=NULL;
unsigned long img_sz=0;
unsigned long hdr_sz=0;
unsigned long add_sz=0; // BSS segment
if (exe == NULL) return 0;
exeload_free(exe);
if (fd < 0) return 0;
// keep a local copy so the C compiler doesn't have to keep dereferencing exe->header
header = exe->header = malloc(sizeof(*header));
if (header == NULL) goto fail;
{
if (read(fd,header,sizeof(*header)) < sizeof(*header))
goto fail;
if (header->magic != 0x5A4D) goto fail;
/* img_sz = number of blocks part of EXE file */
img_sz = exe_dos_header_file_resident_size(header);
/* EXE header size */
hdr_sz = exe_dos_header_file_header_size(header);
if (hdr_sz < 0x20UL) goto fail; /* header must be at least 32 bytes */
if (hdr_sz > 0x8000UL) goto fail; /* header up to 32KB supported */
if (hdr_sz >= img_sz) goto fail; /* header cannot completely consume EXE file */
/* additional resident set (BSS segment) */
add_sz = exe_dos_header_bss_size(header);
if (add_sz > 0xA0000UL) goto fail; /* 640KB limit */
/* this loader only supports EXE images (resident part) up to 640KB */
if ((img_sz+add_sz-hdr_sz) >= 0xA0000UL) goto fail;
/* finish loading EXE header */
hdr = malloc((unsigned short)hdr_sz);
if (hdr == NULL) goto fail;
memcpy(hdr,header,sizeof(*header)); /* this is why header must be 20 bytes, also to make valid structure */
}
/* finish loading EXE header */
{
unsigned short more = (unsigned short)(hdr_sz - sizeof(*header)); /* hdr_sz >= 0x20 therefore this cannot be zero */
if (read(fd,hdr+sizeof(*header),more) < more) goto fail;
}
/* allocate resident section.
* resident section is resident part of EXE on disk plus BSS segment in memory (additional paragraphs) */
{
unsigned short paras = (unsigned short)((img_sz+add_sz+0xFUL/*round up*/-hdr_sz) >> 4UL); /* NTS: should never exceed 640KB */
if (_dos_allocmem(paras,&exe->base_seg) != 0) goto fail;
exe->len_seg = paras;
}
/* file pointer is just past EXE header, load contents */
{
const unsigned int maxload = 0x8000U; // 32KB (must be multiple of 16)
unsigned int load_seg = exe->base_seg;
unsigned long rem = img_sz - hdr_sz;
unsigned int doload;
while (rem > 0UL) {
if (rem > (unsigned long)maxload)
doload = maxload;
else
doload = (unsigned int)rem;
if (_dos_xread(fd,(void far*)MK_FP(load_seg,0),doload) != doload)
goto fail;
load_seg += doload >> 4UL;
rem -= doload;
}
}
/* need to zero additional size */
if (add_sz != 0) {
unsigned long rem = add_sz;
unsigned long ao = img_sz-hdr_sz;
unsigned int zero_seg = exe->base_seg+(ao>>4UL);
const unsigned int maxz = 0x8000U;
unsigned int doz;
while (rem > 0UL) {
if (rem > (unsigned long)maxz)
doz = maxz;
else
doz = (unsigned int)rem;
_fmemset(MK_FP(zero_seg,(unsigned int)ao&0xFU),0,doz);
zero_seg += doz >> 4UL;
rem -= doz;
}
}
uint32_t _memmax(void)
{
uint16_t max;
_dos_allocmem(0xffff, &max);
return (uint32_t)max << 4;
}