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open-simh.simh/sim_fio.c
B. Scott Michel 7adffe5794 Github CI/CD updates 
- Nuke and reinstall HomeBrew for macOS builds. Gets around the whole
  problem of stale links and conflicting packages installed in the GitHub
  macOS images.

- macOS 12 and Ubuntu 20.04 officially deprecated. Ubuntu 20.04 will be
  removed from GitHub's runner images on 01 APR 2025.

- .travis/deps.sh: Add mingw32 as a dependency target, enable MinGW64
  32-bit builds.

- Work around LTO bug on Ubuntu and macOS compilers, where LTO appears
  to miscalculate the number of bytes stored when using the default byte
  swapping 'for' loop. This is a workaround that uses compiler swapping
  intrinsics for well known sizes that appeases LTO. The alternative is
  to wait for a compiler fix, which is infeasible.
2025-08-17 15:32:19 -04:00

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/* sim_fio.c: simulator file I/O library
Copyright (c) 1993-2008, Robert M Supnik
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
ROBERT M SUPNIK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the name of Robert M Supnik shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from Robert M Supnik.
03-Jun-11 MP Simplified VMS 64b support and made more portable
02-Feb-11 MP Added sim_fsize_ex and sim_fsize_name_ex returning t_addr
Added export of sim_buf_copy_swapped and sim_buf_swap_data
28-Jun-07 RMS Added VMS IA64 support (from Norm Lastovica)
10-Jul-06 RMS Fixed linux conditionalization (from Chaskiel Grundman)
15-May-06 RMS Added sim_fsize_name
21-Apr-06 RMS Added FreeBSD large file support (from Mark Martinec)
19-Nov-05 RMS Added OS/X large file support (from Peter Schorn)
16-Aug-05 RMS Fixed C++ declaration and cast problems
17-Jul-04 RMS Fixed bug in optimized sim_fread (reported by Scott Bailey)
26-May-04 RMS Optimized sim_fread (suggested by John Dundas)
02-Jan-04 RMS Split out from SCP
This library includes:
sim_finit - initialize package
sim_fopen - open file
sim_fread - endian independent read (formerly fxread)
sim_fwrite - endian independent write (formerly fxwrite)
sim_fseek - conditionally extended (>32b) seek (
sim_fseeko - extended seek (>32b if available)
sim_can_seek - test for seekable (regular file)
sim_fsize - get file size
sim_fsize_name - get file size of named file
sim_fsize_ex - get file size as a t_offset
sim_fsize_name_ex - get file size as a t_offset of named file
sim_buf_copy_swapped - copy data swapping elements along the way
sim_buf_swap_data - swap data elements inplace in buffer if needed
sim_byte_swap_data - swap data elements inplace in buffer
sim_shmem_open create or attach to a shared memory region
sim_shmem_close close a shared memory region
sim_chdir change working directory
sim_mkdir create a directory
sim_rmdir remove a directory
sim_getcwd get the current working directory
sim_copyfile copy a file
sim_filepath_parts expand and extract filename/path parts
sim_dirscan scan for a filename pattern
sim_get_filelist get a list of files matching a pattern
sim_free_filelist free a filelist
sim_print_filelist print the elements of a filelist
sim_fopen and sim_fseek are OS-dependent. The other routines are not.
sim_fsize is always a 32b routine (it is used only with small capacity random
access devices like fixed head disks and DECtapes).
*/
#define IN_SIM_FIO_C 1 /* Include from sim_fio.c */
#include "sim_defs.h"
t_bool sim_end; /* TRUE = little endian, FALSE = big endian */
t_bool sim_taddr_64; /* t_addr is > 32b and Large File Support available */
t_bool sim_toffset_64; /* Large File (>2GB) file I/O Support available */
#if defined(fprintf) /* Make sure to only use the C rtl stream I/O routines */
#undef fprintf
#undef fputs
#undef fputc
#endif
#ifndef MAX
#define MAX(a,b) (((a) >= (b)) ? (a) : (b))
#endif
#ifndef MIN
#define MIN(a,b) (((a) <= (b)) ? (a) : (b))
#endif
/* OS-independent, endian independent binary I/O package
For consistency, all binary data read and written by the simulator
is stored in little endian data order. That is, in a multi-byte
data item, the bytes are written out right to left, low order byte
to high order byte. On a big endian host, data is read and written
from high byte to low byte. Consequently, data written on a little
endian system must be byte reversed to be usable on a big endian
system, and vice versa.
These routines are analogs of the standard C runtime routines
fread and fwrite. If the host is little endian, or the data items
are size char, then the calls are passed directly to fread or
fwrite. Otherwise, these routines perform the necessary byte swaps.
Sim_fread swaps in place, sim_fwrite uses an intermediate buffer.
*/
int32 sim_finit (void)
{
union {int32 i; char c[sizeof (int32)]; } end_test;
end_test.i = 1; /* test endian-ness */
sim_end = (end_test.c[0] != 0);
sim_toffset_64 = (sizeof(t_offset) > sizeof(int32)); /* Large File (>2GB) support */
sim_taddr_64 = sim_toffset_64 && (sizeof(t_addr) > sizeof(int32));
return sim_end;
}
/* Copy little endian data to local buffer swapping if needed */
void sim_buf_swap_data (void *bptr, size_t size, size_t count)
{
if (sim_end || (count == 0) || (size == sizeof (char)))
return;
sim_byte_swap_data (bptr, size, count);
}
#if defined(__GNUC__) || defined(__clang__)
#define sim_bswap16 __builtin_bswap16
#define sim_bswap32 __builtin_bswap32
#define sim_bswap64 __builtin_bswap64
#define USE_BSWAP_INTRINSIC
#elif defined(_MSC_VER)
#define sim_bswap16 _byteswap_ushort
#define sim_bswap32 _byteswap_ulong
#define sim_bswap64 _byteswap_uint64
#define USE_BSWAP_INTRINSIC
#endif
void sim_byte_swap_data (void *bptr, size_t size, size_t count)
{
size_t j;
uint8 *sptr = (uint8 *) bptr;
if (sim_end || (count == 0) || (size == sizeof (char)))
return;
/* Note: Restructured this code so that GCC Link Time Optimization doesn't generate
* spurious buffer overwrite messages.
*
* LTO tries to inline this function where it's used and ends up evaluating the loop.
* It's clearly a LTO bug that needs to be worked around as opposed to waiting for a
* compiler update (and SIMH can't guarantee that users will maintain updated platforms).
*
* Output from the compiler looks like:
*
* 363 | int32 f, u, comp, cyl, sect, surf;
* | ^
* PDP18B/pdp18b_rp.c:363:13: note: at offset [16, 48] into destination object ‘comp’ of size 4
* PDP18B/pdp18b_rp.c:363:13: note: at offset [80, 17179869168] into destination object ‘comp’ of size 4
* In function ‘sim_byte_swap_data’,
* inlined from ‘sim_byte_swap_data’ at sim_fio.c:130:6,
* inlined from ‘sim_buf_swap_data’ at sim_fio.c:127:1,
* inlined from ‘sim_fread’ at sim_fio.c:158:1,
* inlined from ‘rp_svc’ at PDP18B/pdp18b_rp.c:442:15:
* sim_fio.c:142:17: error: writing 4 bytes into a region of size 0 [-Werror=stringop-overflow=]
* 142 | *sptr++ = *(dptr + k);
*/
for (j = 0; j < count; j++) { /* loop on items */
#if defined(USE_BSWAP_INTRINSIC)
switch (size) {
case sizeof(uint16):
*((uint16 *) sptr) = sim_bswap16 (*((uint16 *) sptr));
break;
case sizeof(uint32):
*((uint32 *) sptr) = sim_bswap32 (*((uint32 *) sptr));
break;
case sizeof(t_uint64):
*((t_uint64 *) sptr) = sim_bswap64 (*((t_uint64 *) sptr));
break;
default:
#endif
{
/* Either there aren't any intrinsics that do byte swapping or
* it's not a well known size. */
uint8 *dptr;
size_t k;
const size_t midpoint = (size + 1) / 2;
dptr = sptr + size - 1;
for (k = size - 1; k >= midpoint; k--) {
uint8 by = *sptr; /* swap end-for-end */
*sptr++ = *dptr;
*dptr-- = by;
}
}
#if defined(USE_BSWAP_INTRINSIC)
break;
}
#endif
sptr += size; /* next item */
}
}
size_t sim_fread (void *bptr, size_t size, size_t count, FILE *fptr)
{
size_t c;
if ((size == 0) || (count == 0)) /* check arguments */
return 0;
c = fread (bptr, size, count, fptr); /* read buffer */
if (sim_end || (size == sizeof (char)) || (c == 0)) /* le, byte, or err? */
return c; /* done */
sim_buf_swap_data (bptr, size, c);
return c;
}
void sim_buf_copy_swapped (void *dbuf, const void *sbuf, size_t size, size_t count)
{
size_t j, k;
const unsigned char *sptr = (const unsigned char *)sbuf;
unsigned char *dptr = (unsigned char *)dbuf;
if (sim_end || (size == sizeof (char))) {
memcpy (dptr, sptr, size * count);
return;
}
for (j = 0; j < count; j++) { /* loop on items */
/* Unsigned countdown loop. Predecrement k before it's used inside the
loop so that k == 0 in the loop body to process the last item, then
terminate. Initialize k to size for the same reason: the predecrement
gives us size - 1 in the loop body. */
for (k = size; k > 0; /* empty */)
*(dptr + --k) = *sptr++;
dptr = dptr + size;
}
}
size_t sim_fwrite (const void *bptr, size_t size, size_t count, FILE *fptr)
{
size_t c, nelem, nbuf, lcnt, total;
int32 i;
const unsigned char *sptr;
unsigned char *sim_flip;
if ((size == 0) || (count == 0)) /* check arguments */
return 0;
if (sim_end || (size == sizeof (char))) /* le or byte? */
return fwrite (bptr, size, count, fptr); /* done */
sim_flip = (unsigned char *)malloc(FLIP_SIZE);
if (!sim_flip)
return 0;
nelem = FLIP_SIZE / size; /* elements in buffer */
nbuf = count / nelem; /* number buffers */
lcnt = count % nelem; /* count in last buf */
if (lcnt) nbuf = nbuf + 1;
else lcnt = nelem;
total = 0;
sptr = (const unsigned char *) bptr; /* init input ptr */
for (i = (int32)nbuf; i > 0; i--) { /* loop on buffers */
c = (i == 1)? lcnt: nelem;
sim_buf_copy_swapped (sim_flip, sptr, size, c);
sptr = sptr + size * count;
c = fwrite (sim_flip, size, c, fptr);
if (c == 0) {
free(sim_flip);
return total;
}
total = total + c;
}
free(sim_flip);
return total;
}
/* Forward Declaration */
t_offset sim_ftell (FILE *st);
/* Get file size */
t_offset sim_fsize_ex (FILE *fp)
{
t_offset pos, sz;
if (fp == NULL)
return 0;
pos = sim_ftell (fp);
if (sim_fseeko (fp, 0, SEEK_END))
return 0;
sz = sim_ftell (fp);
if (sim_fseeko (fp, pos, SEEK_SET))
return 0;
return sz;
}
t_offset sim_fsize_name_ex (const char *fname)
{
FILE *fp;
t_offset sz;
if ((fp = sim_fopen (fname, "rb")) == NULL)
return 0;
sz = sim_fsize_ex (fp);
fclose (fp);
return sz;
}
uint32 sim_fsize_name (const char *fname)
{
return (uint32)(sim_fsize_name_ex (fname));
}
uint32 sim_fsize (FILE *fp)
{
return (uint32)(sim_fsize_ex (fp));
}
t_bool sim_can_seek (FILE *fp)
{
struct stat statb;
if ((0 != fstat (fileno (fp), &statb)) ||
(0 == (statb.st_mode & S_IFREG)))
return FALSE;
return TRUE;
}
static char *_sim_expand_homedir (const char *file, char *dest, size_t dest_size)
{
uint8 *without_quotes = NULL;
uint32 dsize = 0;
errno = 0;
if (((*file == '"') && (file[strlen (file) - 1] == '"')) ||
((*file == '\'') && (file[strlen (file) - 1] == '\''))) {
without_quotes = (uint8*)malloc (strlen (file) + 1);
if (without_quotes == NULL)
return NULL;
if (SCPE_OK != sim_decode_quoted_string (file, without_quotes, &dsize)) {
free (without_quotes);
errno = EINVAL;
return NULL;
}
file = (const char*)without_quotes;
}
if (memcmp (file, "~/", 2) != 0)
strlcpy (dest, file, dest_size);
else {
char *cptr = getenv("HOME");
char *cptr2;
if (cptr == NULL) {
cptr = getenv("HOMEPATH");
cptr2 = getenv("HOMEDRIVE");
}
else
cptr2 = NULL;
if (cptr && (dest_size > strlen (cptr) + strlen (file) + 3))
snprintf(dest, dest_size, "%s%s%s%s", cptr2 ? cptr2 : "", cptr, strchr (cptr, '/') ? "/" : "\\", file + 2);
else
strlcpy (dest, file, dest_size);
while ((strchr (dest, '\\') != NULL) && ((cptr = strchr (dest, '/')) != NULL))
*cptr = '\\';
}
free (without_quotes);
return dest;
}
#if defined(_WIN32)
#include <direct.h>
#include <io.h>
#include <fcntl.h>
#else
#include <unistd.h>
#endif
int sim_stat (const char *fname, struct stat *stat_str)
{
char namebuf[PATH_MAX + 1];
if (NULL == _sim_expand_homedir (fname, namebuf, sizeof (namebuf)))
return -1;
return stat (namebuf, stat_str);
}
int sim_chdir(const char *path)
{
char pathbuf[PATH_MAX + 1];
if (NULL == _sim_expand_homedir (path, pathbuf, sizeof (pathbuf)))
return -1;
return chdir (pathbuf);
}
int sim_mkdir(const char *path)
{
char pathbuf[PATH_MAX + 1];
if (NULL == _sim_expand_homedir (path, pathbuf, sizeof (pathbuf)))
return -1;
#if defined(_WIN32)
return mkdir (pathbuf);
#else
return mkdir (pathbuf, 0777);
#endif
}
int sim_rmdir(const char *path)
{
char pathbuf[PATH_MAX + 1];
if (NULL == _sim_expand_homedir (path, pathbuf, sizeof (pathbuf)))
return -1;
return rmdir (pathbuf);
}
static void _sim_filelist_entry (const char *directory,
const char *filename,
t_offset FileSize,
const struct stat *filestat,
void *context)
{
char **filelist = *(char ***)context;
char FullPath[PATH_MAX + 1];
int listcount = 0;
snprintf (FullPath, sizeof (FullPath), "%s%s", directory, filename);
if (filelist != NULL) {
while (filelist[listcount++] != NULL);
--listcount;
}
filelist = (char **)realloc (filelist, (listcount + 2) * sizeof (*filelist));
filelist[listcount] = strdup (FullPath);
filelist[listcount + 1] = NULL;
*(char ***)context = filelist;
}
char **sim_get_filelist (const char *filename)
{
t_stat r;
char **filelist = NULL;
r = sim_dir_scan (filename, _sim_filelist_entry, &filelist);
if (r == SCPE_OK)
return filelist;
return NULL;
}
void sim_free_filelist (char ***pfilelist)
{
char **listp = *pfilelist;
if (listp == NULL)
return;
while (*listp != NULL)
free (*listp++);
free (*pfilelist);
*pfilelist = NULL;
}
void sim_print_filelist (char **filelist)
{
if (filelist == NULL)
return;
while (*filelist != NULL)
sim_printf ("%s\n", *filelist++);
}
/* OS-dependent routines */
/* Optimized file open */
FILE* sim_fopen (const char *file, const char *mode)
{
FILE *f;
char namebuf[PATH_MAX + 1];
if (NULL == _sim_expand_homedir (file, namebuf, sizeof (namebuf)))
return NULL;
#if defined (VMS)
f = fopen (namebuf, mode, "ALQ=32", "DEQ=4096",
"MBF=6", "MBC=127", "FOP=cbt,tef", "ROP=rah,wbh", "CTX=stm");
#elif (defined (__linux) || defined (__linux__) || defined (__hpux) || defined (_AIX)) && !defined (DONT_DO_LARGEFILE)
f = fopen64 (namebuf, mode);
#else
f = fopen (namebuf, mode);
#endif
return f;
}
#if !defined (DONT_DO_LARGEFILE)
/* 64b VMS */
#if ((defined (__ALPHA) || defined (__ia64)) && defined (VMS) && (__DECC_VER >= 60590001)) || \
((defined(__sun) || defined(__sun__)) && defined(_LARGEFILE_SOURCE))
#define S_SIM_IO_FSEEK_EXT_ 1
int sim_fseeko (FILE *st, t_offset offset, int whence)
{
return fseeko (st, (off_t)offset, whence);
}
t_offset sim_ftell (FILE *st)
{
return (t_offset)(ftello (st));
}
#endif
/* Alpha UNIX - natively 64b */
#if defined (__ALPHA) && defined (__unix__) /* Alpha UNIX */
#define S_SIM_IO_FSEEK_EXT_ 1
int sim_fseeko (FILE *st, t_offset offset, int whence)
{
return fseek (st, offset, whence);
}
t_offset sim_ftell (FILE *st)
{
return (t_offset)(ftell (st));
}
#endif
/* Windows */
#if defined (_WIN32)
#define S_SIM_IO_FSEEK_EXT_ 1
#include <sys/stat.h>
int sim_fseeko (FILE *st, t_offset offset, int whence)
{
return _fseeki64 (st, (__int64)offset, whence);
}
t_offset sim_ftell (FILE *st)
{
return (t_offset)_ftelli64 (st);
}
#endif /* end Windows */
/* Linux */
#if defined (__linux) || defined (__linux__) || defined (__hpux) || defined (_AIX)
#define S_SIM_IO_FSEEK_EXT_ 1
int sim_fseeko (FILE *st, t_offset xpos, int origin)
{
return fseeko64 (st, (off64_t)xpos, origin);
}
t_offset sim_ftell (FILE *st)
{
return (t_offset)(ftello64 (st));
}
#endif /* end Linux with LFS */
/* Apple OS/X */
#if defined (__APPLE__) || defined (__FreeBSD__) || defined(__NetBSD__) || defined (__OpenBSD__) || defined (__CYGWIN__)
#define S_SIM_IO_FSEEK_EXT_ 1
int sim_fseeko (FILE *st, t_offset xpos, int origin)
{
return fseeko (st, (off_t)xpos, origin);
}
t_offset sim_ftell (FILE *st)
{
return (t_offset)(ftello (st));
}
#endif /* end Apple OS/X */
#endif /* !DONT_DO_LARGEFILE */
/* Default: no OS-specific routine has been defined */
#if !defined (S_SIM_IO_FSEEK_EXT_)
int sim_fseeko (FILE *st, t_offset xpos, int origin)
{
return fseek (st, (long) xpos, origin);
}
t_offset sim_ftell (FILE *st)
{
return (t_offset)(ftell (st));
}
#endif
int sim_fseek (FILE *st, t_addr offset, int whence)
{
return sim_fseeko (st, (t_offset)offset, whence);
}
#if defined(_WIN32)
const char *
sim_get_os_error_text (int Error)
{
static char szMsgBuffer[2048];
DWORD dwStatus;
dwStatus = FormatMessageA (FORMAT_MESSAGE_FROM_SYSTEM|
FORMAT_MESSAGE_IGNORE_INSERTS, // __in DWORD dwFlags,
NULL, // __in_opt LPCVOID lpSource,
Error, // __in DWORD dwMessageId,
0, // __in DWORD dwLanguageId,
szMsgBuffer, // __out LPTSTR lpBuffer,
sizeof (szMsgBuffer) - 1, // __in DWORD nSize,
NULL); // __in_opt va_list *Arguments
if (0 == dwStatus)
snprintf(szMsgBuffer, sizeof(szMsgBuffer) - 1, "Error Code: 0x%X", Error);
while (sim_isspace (szMsgBuffer[strlen (szMsgBuffer)-1]))
szMsgBuffer[strlen (szMsgBuffer) - 1] = '\0';
return szMsgBuffer;
}
t_stat sim_copyfile (const char *source_file, const char *dest_file, t_bool overwrite_existing)
{
char sourcename[PATH_MAX + 1], destname[PATH_MAX + 1];
if (NULL == _sim_expand_homedir (source_file, sourcename, sizeof (sourcename)))
return sim_messagef (SCPE_ARG, "Error Copying - Problem Parsing Source Filename '%s'\n", source_file);
if (NULL == _sim_expand_homedir (dest_file, destname, sizeof (destname)))
return sim_messagef (SCPE_ARG, "Error Copying - Problem Parsing Destination Filename '%s'\n", dest_file);
if (CopyFileA (sourcename, destname, !overwrite_existing))
return SCPE_OK;
return sim_messagef (SCPE_ARG, "Error Copying '%s' to '%s': %s\n", source_file, dest_file, sim_get_os_error_text (GetLastError ()));
}
static void _time_t_to_filetime (time_t ttime, FILETIME *filetime)
{
t_uint64 time64;
time64 = 134774; /* Days between Jan 1, 1601 and Jan 1, 1970 */
time64 *= 24; /* Hours */
time64 *= 3600; /* Seconds */
time64 += (t_uint64)ttime; /* include time_t seconds */
time64 *= 10000000; /* Convert seconds to 100ns units */
filetime->dwLowDateTime = (DWORD)time64;
filetime->dwHighDateTime = (DWORD)(time64 >> 32);
}
t_stat sim_set_file_times (const char *file_name, time_t access_time, time_t write_time)
{
char filename[PATH_MAX + 1];
FILETIME accesstime, writetime;
HANDLE hFile;
BOOL bStat;
_time_t_to_filetime (access_time, &accesstime);
_time_t_to_filetime (write_time, &writetime);
if (NULL == _sim_expand_homedir (file_name, filename, sizeof (filename)))
return sim_messagef (SCPE_ARG, "Error Setting File Times - Problem Source Filename '%s'\n", filename);
hFile = CreateFileA (filename, GENERIC_READ|GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (hFile == INVALID_HANDLE_VALUE)
return sim_messagef (SCPE_ARG, "Can't open file '%s' to set it's times: %s\n", filename, sim_get_os_error_text (GetLastError ()));
bStat = SetFileTime (hFile, NULL, &accesstime, &writetime);
CloseHandle (hFile);
return bStat ? SCPE_OK : sim_messagef (SCPE_ARG, "Error setting file '%s' times: %s\n", filename, sim_get_os_error_text (GetLastError ()));
}
#include <io.h>
#include <direct.h>
int sim_set_fsize (FILE *fptr, t_addr size)
{
return _chsize(_fileno(fptr), (long)size);
}
int sim_set_fifo_nonblock (FILE *fptr)
{
return -1;
}
struct SHMEM {
HANDLE hMapping;
size_t shm_size;
void *shm_base;
char *shm_name;
};
t_stat sim_shmem_open (const char *name, size_t size, SHMEM **shmem, void **addr)
{
SYSTEM_INFO SysInfo;
t_bool AlreadyExists;
GetSystemInfo (&SysInfo);
*shmem = (SHMEM *)calloc (1, sizeof(**shmem));
if (*shmem == NULL)
return SCPE_MEM;
(*shmem)->shm_name = (char *)calloc (1, 1 + strlen (name));
if ((*shmem)->shm_name == NULL) {
free (*shmem);
*shmem = NULL;
return SCPE_MEM;
}
strcpy ((*shmem)->shm_name, name);
(*shmem)->hMapping = INVALID_HANDLE_VALUE;
(*shmem)->shm_size = size;
(*shmem)->shm_base = NULL;
(*shmem)->hMapping = CreateFileMappingA (INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE|SEC_COMMIT, 0, (DWORD)(size+SysInfo.dwPageSize), name);
if ((*shmem)->hMapping == INVALID_HANDLE_VALUE) {
DWORD LastError = GetLastError();
sim_shmem_close (*shmem);
*shmem = NULL;
return sim_messagef (SCPE_OPENERR, "Can't CreateFileMapping of a %u byte shared memory segment '%s' - LastError=0x%X\n", (unsigned int)size, name, (unsigned int)LastError);
}
AlreadyExists = (GetLastError () == ERROR_ALREADY_EXISTS);
(*shmem)->shm_base = MapViewOfFile ((*shmem)->hMapping, FILE_MAP_ALL_ACCESS, 0, 0, 0);
if ((*shmem)->shm_base == NULL) {
DWORD LastError = GetLastError();
sim_shmem_close (*shmem);
*shmem = NULL;
return sim_messagef (SCPE_OPENERR, "Can't MapViewOfFile() of a %u byte shared memory segment '%s' - LastError=0x%X\n", (unsigned int)size, name, (unsigned int)LastError);
}
if (AlreadyExists) {
if (*((DWORD *)((*shmem)->shm_base)) == 0)
Sleep (50);
if (*((DWORD *)((*shmem)->shm_base)) != (DWORD)size) {
DWORD SizeFound = *((DWORD *)((*shmem)->shm_base));
sim_shmem_close (*shmem);
*shmem = NULL;
return sim_messagef (SCPE_OPENERR, "Shared Memory segment '%s' is %u bytes instead of %d\n", name, (unsigned int)SizeFound, (int)size);
}
}
else
*((DWORD *)((*shmem)->shm_base)) = (DWORD)size; /* Save Size in first page */
*addr = ((char *)(*shmem)->shm_base + SysInfo.dwPageSize); /* Point to the second page for data */
return SCPE_OK;
}
void sim_shmem_close (SHMEM *shmem)
{
if (shmem == NULL)
return;
if (shmem->shm_base != NULL)
UnmapViewOfFile (shmem->shm_base);
if (shmem->hMapping != INVALID_HANDLE_VALUE)
CloseHandle (shmem->hMapping);
free (shmem->shm_name);
free (shmem);
}
int32 sim_shmem_atomic_add (int32 *p, int32 v)
{
return InterlockedExchangeAdd ((volatile long *) p,v) + (v);
}
t_bool sim_shmem_atomic_cas (int32 *ptr, int32 oldv, int32 newv)
{
return (InterlockedCompareExchange ((LONG volatile *) ptr, newv, oldv) == oldv);
}
#else /* !defined(_WIN32) */
#include <unistd.h>
int sim_set_fsize (FILE *fptr, t_addr size)
{
return ftruncate(fileno(fptr), (off_t)size);
}
#include <sys/stat.h>
#include <fcntl.h>
#if defined (HAVE_UTIME)
#include <utime.h>
#endif
const char *
sim_get_os_error_text (int Error)
{
return strerror (Error);
}
t_stat sim_copyfile (const char *source_file, const char *dest_file, t_bool overwrite_existing)
{
FILE *fIn = NULL, *fOut = NULL;
t_stat st = SCPE_OK;
char *buf = NULL;
size_t bytes;
fIn = sim_fopen (source_file, "rb");
if (!fIn) {
st = sim_messagef (SCPE_ARG, "Can't open '%s' for input: %s\n", source_file, strerror (errno));
goto Cleanup_Return;
}
fOut = sim_fopen (dest_file, "wb");
if (!fOut) {
st = sim_messagef (SCPE_ARG, "Can't open '%s' for output: %s\n", dest_file, strerror (errno));
goto Cleanup_Return;
}
buf = (char *)malloc (BUFSIZ);
while ((bytes = fread (buf, 1, BUFSIZ, fIn)))
fwrite (buf, 1, bytes, fOut);
Cleanup_Return:
free (buf);
if (fIn)
fclose (fIn);
if (fOut)
fclose (fOut);
#if defined(HAVE_UTIME)
if (st == SCPE_OK) {
struct stat statb;
if (!sim_stat (source_file, &statb)) {
struct utimbuf utim;
utim.actime = statb.st_atime;
utim.modtime = statb.st_mtime;
if (utime (dest_file, &utim))
st = SCPE_IOERR;
}
else
st = SCPE_IOERR;
}
#endif
return st;
}
t_stat sim_set_file_times (const char *file_name, time_t access_time, time_t write_time)
{
t_stat st = SCPE_IOERR;
#if defined (HAVE_UTIME)
struct utimbuf utim;
utim.actime = access_time;
utim.modtime = write_time;
if (!utime (file_name, &utim))
st = SCPE_OK;
#else
st = SCPE_NOFNC;
#endif
return st;
}
int sim_set_fifo_nonblock (FILE *fptr)
{
struct stat stbuf;
if (!fptr || fstat (fileno(fptr), &stbuf))
return -1;
#if defined(S_IFIFO) && defined(O_NONBLOCK)
if ((stbuf.st_mode & S_IFIFO)) {
int flags = fcntl(fileno(fptr), F_GETFL, 0);
return fcntl(fileno(fptr), F_SETFL, flags | O_NONBLOCK);
}
#endif
return -1;
}
#if defined (__linux__) || defined (__APPLE__) || defined (__CYGWIN__) || defined (__FreeBSD__) || defined(__NetBSD__) || defined (__OpenBSD__)
#if defined (HAVE_SHM_OPEN)
#include <sys/mman.h>
#endif
struct SHMEM {
int shm_fd;
size_t shm_size;
void *shm_base;
char *shm_name;
};
t_stat sim_shmem_open (const char *name, size_t size, SHMEM **shmem, void **addr)
{
#if defined (HAVE_SHM_OPEN) && defined (__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4)
*shmem = (SHMEM *)calloc (1, sizeof(**shmem));
mode_t orig_mask;
*addr = NULL;
if (*shmem == NULL)
return SCPE_MEM;
(*shmem)->shm_name = (char *)calloc (1, 1 + strlen (name) + ((*name != '/') ? 1 : 0));
if ((*shmem)->shm_name == NULL) {
free (*shmem);
*shmem = NULL;
return SCPE_MEM;
}
sprintf ((*shmem)->shm_name, "%s%s", ((*name != '/') ? "/" : ""), name);
(*shmem)->shm_base = MAP_FAILED;
(*shmem)->shm_size = size;
(*shmem)->shm_fd = shm_open ((*shmem)->shm_name, O_RDWR, 0);
if ((*shmem)->shm_fd == -1) {
int last_errno;
orig_mask = umask (0000);
(*shmem)->shm_fd = shm_open ((*shmem)->shm_name, O_CREAT | O_RDWR, 0660);
last_errno = errno;
umask (orig_mask); /* Restore original mask */
if ((*shmem)->shm_fd == -1) {
sim_shmem_close (*shmem);
*shmem = NULL;
return sim_messagef (SCPE_OPENERR, "Can't shm_open() a %d byte shared memory segment '%s' - errno=%d - %s\n", (int)size, name, last_errno, strerror (last_errno));
}
if (ftruncate((*shmem)->shm_fd, size)) {
sim_shmem_close (*shmem);
*shmem = NULL;
return SCPE_OPENERR;
}
}
else {
struct stat statb;
if ((fstat ((*shmem)->shm_fd, &statb)) ||
((size_t)statb.st_size != (*shmem)->shm_size)) {
sim_shmem_close (*shmem);
*shmem = NULL;
return sim_messagef (SCPE_OPENERR, "Shared Memory segment '%s' is %d bytes instead of %d\n", name, (int)(statb.st_size), (int)size);
}
}
(*shmem)->shm_base = mmap(NULL, (*shmem)->shm_size, PROT_READ | PROT_WRITE, MAP_SHARED, (*shmem)->shm_fd, 0);
if ((*shmem)->shm_base == MAP_FAILED) {
int last_errno = errno;
sim_shmem_close (*shmem);
*shmem = NULL;
return sim_messagef (SCPE_OPENERR, "Shared Memory '%s' mmap() failed. errno=%d - %s\n", name, last_errno, strerror (last_errno));
}
*addr = (*shmem)->shm_base;
return SCPE_OK;
#else
*shmem = NULL;
return sim_messagef (SCPE_NOFNC, "Shared memory not available - Missing shm_open() API\n");
#endif
}
void sim_shmem_close (SHMEM *shmem)
{
#if defined (HAVE_SHM_OPEN)
if (shmem == NULL)
return;
if (shmem->shm_base != MAP_FAILED)
munmap (shmem->shm_base, shmem->shm_size);
if (shmem->shm_fd != -1) {
shm_unlink (shmem->shm_name);
close (shmem->shm_fd);
}
free (shmem->shm_name);
free (shmem);
#endif
}
int32 sim_shmem_atomic_add (int32 *p, int32 v)
{
#if defined (__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4)
return __sync_add_and_fetch ((int *) p, v);
#else
return *p + v;
#endif
}
t_bool sim_shmem_atomic_cas (int32 *ptr, int32 oldv, int32 newv)
{
#if defined (__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4)
return __sync_bool_compare_and_swap (ptr, oldv, newv);
#else
if (*ptr == oldv) {
*ptr = newv;
return 1;
}
else
return 0;
#endif
}
#else /* !(defined (__linux__) || defined (__APPLE__)) */
t_stat sim_shmem_open (const char *name, size_t size, SHMEM **shmem, void **addr)
{
return SCPE_NOFNC;
}
void sim_shmem_close (SHMEM *shmem)
{
}
int32 sim_shmem_atomic_add (int32 *p, int32 v)
{
return -1;
}
t_bool sim_shmem_atomic_cas (int32 *ptr, int32 oldv, int32 newv)
{
return FALSE;
}
#endif /* defined (__linux__) || defined (__APPLE__) */
#endif /* defined (_WIN32) */
#if defined(__VAX)
/*
* We provide a 'basic' snprintf, which 'might' overrun a buffer, but
* the actual use cases don't on other platforms and none of the callers
* care about the function return value.
*/
int sim_vax_snprintf(char *buf, size_t buf_size, const char *fmt, ...)
{
va_list arglist;
va_start (arglist, fmt);
vsprintf (buf, fmt, arglist);
va_end (arglist);
return 0;
}
#endif
char *sim_getcwd (char *buf, size_t buf_size)
{
#if defined (VMS)
return getcwd (buf, buf_size, 0);
#elif defined(__MINGW64__) ||defined(_MSC_VER) || defined(__MINGW32__)
return _getcwd (buf, (int) buf_size);
#else
return getcwd (buf, buf_size);
#endif
}
/*
* Parsing and expansion of file names.
*
* %~I% - expands filepath value removing any surrounding quotes (" or ')
* %~fI% - expands filepath value to a fully qualified path name
* %~pI% - expands filepath value to a path only
* %~nI% - expands filepath value to a file name only
* %~xI% - expands filepath value to a file extension only
*
* The modifiers can be combined to get compound results:
*
* %~pnI% - expands filepath value to a path and name only
* %~nxI% - expands filepath value to a file name and extension only
*
* In the above example above %I% can be replaced by other
* environment variables or numeric parameters to a DO command
* invocation.
*/
char *sim_filepath_parts (const char *filepath, const char *parts)
{
size_t tot_len = 0, tot_size = 0;
char *fullpath = NULL, *result = NULL;
char *c, *name, *ext;
char chr;
const char *p;
char filesizebuf[32] = "";
char filedatetimebuf[32] = "";
char namebuf[PATH_MAX + 1];
/* Expand ~/ home directory */
if (NULL == _sim_expand_homedir (filepath, namebuf, sizeof (namebuf)))
return NULL;
filepath = namebuf;
/* Check for full or current directory relative path */
if ((filepath[1] == ':') ||
(filepath[0] == '/') ||
(filepath[0] == '\\')){
tot_len = 1 + strlen (filepath);
fullpath = (char *)malloc (tot_len);
if (fullpath == NULL)
return NULL;
strcpy (fullpath, filepath);
}
else { /* Need to prepend current directory */
char dir[PATH_MAX+1] = "";
char *wd = sim_getcwd(dir, sizeof (dir));
if (wd == NULL)
return NULL;
tot_len = 1 + strlen (filepath) + 1 + strlen (dir);
fullpath = (char *)malloc (tot_len);
if (fullpath == NULL)
return NULL;
strlcpy (fullpath, dir, tot_len);
if ((dir[strlen (dir) - 1] != '/') && /* if missing a trailing directory separator? */
(dir[strlen (dir) - 1] != '\\'))
strlcat (fullpath, "/", tot_len); /* then add one */
strlcat (fullpath, filepath, tot_len);
}
while ((c = strchr (fullpath, '\\'))) /* standardize on / directory separator */
*c = '/';
if ((fullpath[1] == ':') && islower (fullpath[0]))
fullpath[0] = toupper (fullpath[0]);
while ((c = strstr (fullpath + 1, "//"))) /* strip out redundant / characters (leaving the option for a leading //) */
memmove (c, c + 1, 1 + strlen (c + 1));
while ((c = strstr (fullpath, "/./"))) /* strip out irrelevant /./ sequences */
memmove (c, c + 2, 1 + strlen (c + 2));
while ((c = strstr (fullpath, "/../"))) { /* process up directory climbing */
char *cl = c - 1;
while ((*cl != '/') && (cl > fullpath))
--cl;
if ((cl <= fullpath) || /* Digest Leading /../ sequences */
((fullpath[1] == ':') && (c == fullpath + 2)))
memmove (c, c + 3, 1 + strlen (c + 3)); /* and removing intervening elements */
else
if (*cl == '/')
memmove (cl, c + 3, 1 + strlen (c + 3));/* and removing intervening elements */
else
break;
}
if (!strrchr (fullpath, '/'))
name = fullpath + strlen (fullpath);
else
name = 1 + strrchr (fullpath, '/');
ext = strrchr (name, '.');
if (ext == NULL)
ext = name + strlen (name);
tot_size = 0;
if (*parts == '\0') /* empty part specifier means strip only quotes */
tot_size = strlen (filepath);
if (strchr (parts, 't') || /* modification time or */
strchr (parts, 'z')) { /* or size requested? */
struct stat filestat;
struct tm *tm;
memset (&filestat, 0, sizeof (filestat));
(void)stat (fullpath, &filestat);
if (sizeof (filestat.st_size) == 4)
sprintf (filesizebuf, "%ld ", (long)filestat.st_size);
else
sprintf (filesizebuf, "%" LL_FMT "d ", (LL_TYPE)filestat.st_size);
tm = localtime (&filestat.st_mtime);
sprintf (filedatetimebuf, "%02d/%02d/%04d %02d:%02d %cM ", 1 + tm->tm_mon, tm->tm_mday, 1900 + tm->tm_year,
tm->tm_hour % 12, tm->tm_min, (0 == (tm->tm_hour % 12)) ? 'A' : 'P');
}
for (p = parts; *p; p++) {
switch (*p) {
case 'f':
tot_size += strlen (fullpath);
break;
case 'p':
tot_size += name - fullpath;
break;
case 'n':
tot_size += ext - name;
break;
case 'x':
tot_size += strlen (ext);
break;
case 't':
tot_size += strlen (filedatetimebuf);
break;
case 'z':
tot_size += strlen (filesizebuf);
break;
}
}
result = (char *)malloc (1 + tot_size);
*result = '\0';
if (*parts == '\0') /* empty part specifier means strip only quotes */
strlcat (result, filepath, 1 + tot_size);
for (p = parts; *p; p++) {
switch (*p) {
case 'f':
strlcat (result, fullpath, 1 + tot_size);
break;
case 'p':
chr = *name;
*name = '\0';
strlcat (result, fullpath, 1 + tot_size);
*name = chr;
break;
case 'n':
chr = *ext;
*ext = '\0';
strlcat (result, name, 1 + tot_size);
*ext = chr;
break;
case 'x':
strlcat (result, ext, 1 + tot_size);
break;
case 't':
strlcat (result, filedatetimebuf, 1 + tot_size);
break;
case 'z':
strlcat (result, filesizebuf, 1 + tot_size);
break;
}
}
free (fullpath);
return result;
}
#if defined (_WIN32)
t_stat sim_dir_scan (const char *cptr, DIR_ENTRY_CALLBACK entry, void *context)
{
HANDLE hFind;
WIN32_FIND_DATAA File;
struct stat filestat;
char WildName[PATH_MAX + 1];
if (NULL == _sim_expand_homedir (cptr, WildName, sizeof (WildName)))
return SCPE_ARG;
cptr = WildName;
sim_trim_endspc (WildName);
if ((hFind = FindFirstFileA (cptr, &File)) != INVALID_HANDLE_VALUE) {
t_int64 FileSize;
char DirName[PATH_MAX + 1], FileName[PATH_MAX + 1];
char *c;
const char *backslash = strchr (cptr, '\\');
const char *slash = strchr (cptr, '/');
const char *pathsep = (backslash && slash) ? MIN (backslash, slash) : (backslash ? backslash : slash);
GetFullPathNameA(cptr, sizeof(DirName), DirName, (char **)&c);
c = strrchr (DirName, '\\');
*c = '\0'; /* Truncate to just directory path */
if (!pathsep || /* Separator wasn't mentioned? */
(slash && (0 == strcmp (slash, "/*"))))
pathsep = "\\"; /* Default to Windows backslash */
if (*pathsep == '/') { /* If slash separator? */
while ((c = strchr (DirName, '\\')))
*c = '/'; /* Convert backslash to slash */
}
sprintf (&DirName[strlen (DirName)], "%c", *pathsep);
do {
FileSize = (((t_int64)(File.nFileSizeHigh)) << 32) | File.nFileSizeLow;
strlcpy (FileName, DirName, sizeof (FileName));
strlcat (FileName, File.cFileName, sizeof (FileName));
stat (FileName, &filestat);
entry (DirName, File.cFileName, FileSize, &filestat, context);
} while (FindNextFile (hFind, &File));
FindClose (hFind);
}
else
return SCPE_ARG;
return SCPE_OK;
}
#else /* !defined (_WIN32) */
#include <sys/stat.h>
#if defined (HAVE_GLOB)
#include <glob.h>
#else /* !defined (HAVE_GLOB) */
#include <dirent.h>
#if defined (HAVE_FNMATCH)
#include <fnmatch.h>
#endif
#endif /* defined (HAVE_GLOB) */
t_stat sim_dir_scan (const char *cptr, DIR_ENTRY_CALLBACK entry, void *context)
{
#if defined (HAVE_GLOB)
glob_t paths;
#else
DIR *dir;
#endif
int found_count = 0;
struct stat filestat;
char *c;
char DirName[PATH_MAX + 1], WholeName[PATH_MAX + 1], WildName[PATH_MAX + 1], MatchName[PATH_MAX + 1];
memset (DirName, 0, sizeof(DirName));
memset (WholeName, 0, sizeof(WholeName));
memset (MatchName, 0, sizeof(MatchName));
if (NULL == _sim_expand_homedir (cptr, WildName, sizeof (WildName)))
return SCPE_ARG;
cptr = WildName;
sim_trim_endspc (WildName);
c = sim_filepath_parts (cptr, "f");
strlcpy (WholeName, c, sizeof (WholeName));
free (c);
c = sim_filepath_parts (cptr, "nx");
strlcpy (MatchName, c, sizeof (MatchName));
free (c);
c = strrchr (WholeName, '/');
if (c) {
memmove (DirName, WholeName, 1+c-WholeName);
DirName[1+c-WholeName] = '\0';
}
else
DirName[0] = '\0';
cptr = WholeName;
#if defined (HAVE_GLOB)
memset (&paths, 0, sizeof (paths));
if (0 == glob (cptr, 0, NULL, &paths)) {
#else
dir = opendir(DirName[0] ? DirName : "/.");
if (dir) {
struct dirent *ent;
#endif
t_offset FileSize;
char *FileName;
char *p_name;
#if defined (HAVE_GLOB)
size_t i;
#endif
#if defined (HAVE_GLOB)
for (i=0; i<paths.gl_pathc; i++) {
FileName = (char *)malloc (1 + strlen (paths.gl_pathv[i]));
sprintf (FileName, "%s", paths.gl_pathv[i]);
#else /* !defined (HAVE_GLOB) */
while ((ent = readdir (dir))) {
#if defined (HAVE_FNMATCH)
if (fnmatch(MatchName, ent->d_name, 0))
continue;
#else /* !defined (HAVE_FNMATCH) */
/* only match all names or exact name without fnmatch support */
if ((strcmp(MatchName, "*") != 0) &&
(strcmp(MatchName, ent->d_name) != 0))
continue;
#endif /* defined (HAVE_FNMATCH) */
FileName = (char *)malloc (1 + strlen (DirName) + strlen (ent->d_name));
sprintf (FileName, "%s%s", DirName, ent->d_name);
#endif /* defined (HAVE_GLOB) */
p_name = FileName + strlen (DirName);
memset (&filestat, 0, sizeof (filestat));
(void)stat (FileName, &filestat);
FileSize = (t_offset)((filestat.st_mode & S_IFDIR) ? 0 : sim_fsize_name_ex (FileName));
entry (DirName, p_name, FileSize, &filestat, context);
free (FileName);
++found_count;
}
#if defined (HAVE_GLOB)
globfree (&paths);
#else
closedir (dir);
#endif
}
else
return SCPE_ARG;
if (found_count)
return SCPE_OK;
else
return SCPE_ARG;
}
#endif /* !defined(_WIN32) */
/* Trim trailing spaces from a string
Inputs:
cptr = pointer to string
Outputs:
cptr = pointer to string
*/
char *sim_trim_endspc (char *cptr)
{
char *tptr;
tptr = cptr + strlen (cptr);
while ((--tptr >= cptr) && sim_isspace (*tptr))
*tptr = 0;
return cptr;
}
int sim_isspace (int c)
{
return ((c < 0) || (c >= 128)) ? 0 : isspace (c);
}
int sim_islower (int c)
{
return (c >= 'a') && (c <= 'z');
}
int sim_isupper (int c)
{
return (c >= 'A') && (c <= 'Z');
}
int sim_toupper (int c)
{
return ((c >= 'a') && (c <= 'z')) ? ((c - 'a') + 'A') : c;
}
int sim_tolower (int c)
{
return ((c >= 'A') && (c <= 'Z')) ? ((c - 'A') + 'a') : c;
}
int sim_isalpha (int c)
{
return ((c < 0) || (c >= 128)) ? 0 : isalpha (c);
}
int sim_isprint (int c)
{
return ((c < 0) || (c >= 128)) ? 0 : isprint (c);
}
int sim_isdigit (int c)
{
return ((c >= '0') && (c <= '9'));
}
int sim_isgraph (int c)
{
return ((c < 0) || (c >= 128)) ? 0 : isgraph (c);
}
int sim_isalnum (int c)
{
return ((c < 0) || (c >= 128)) ? 0 : isalnum (c);
}
/* strncasecmp() is not available on all platforms */
int sim_strncasecmp (const char* string1, const char* string2, size_t len)
{
size_t i;
unsigned char s1, s2;
for (i=0; i<len; i++) {
s1 = (unsigned char)string1[i];
s2 = (unsigned char)string2[i];
s1 = (unsigned char)sim_toupper (s1);
s2 = (unsigned char)sim_toupper (s2);
if (s1 < s2)
return -1;
if (s1 > s2)
return 1;
if (s1 == 0)
return 0;
}
return 0;
}
/* strcasecmp() is not available on all platforms */
int sim_strcasecmp (const char *string1, const char *string2)
{
size_t i = 0;
unsigned char s1, s2;
while (1) {
s1 = (unsigned char)string1[i];
s2 = (unsigned char)string2[i];
s1 = (unsigned char)sim_toupper (s1);
s2 = (unsigned char)sim_toupper (s2);
if (s1 == s2) {
if (s1 == 0)
return 0;
i++;
continue;
}
if (s1 < s2)
return -1;
if (s1 > s2)
return 1;
}
return 0;
}
int sim_strwhitecasecmp (const char *string1, const char *string2, t_bool casecmp)
{
unsigned char s1 = 1, s2 = 1; /* start with equal, but not space */
while ((s1 == s2) && (s1 != '\0')) {
if (s1 == ' ') { /* last character was space? */
while (s1 == ' ') { /* read until not a space */
s1 = *string1++;
if (sim_isspace (s1))
s1 = ' '; /* all whitespace is a space */
else {
if (casecmp)
s1 = (unsigned char)sim_toupper (s1);
}
}
}
else { /* get new character */
s1 = *string1++;
if (sim_isspace (s1))
s1 = ' '; /* all whitespace is a space */
else {
if (casecmp)
s1 = (unsigned char)sim_toupper (s1);
}
}
if (s2 == ' ') { /* last character was space? */
while (s2 == ' ') { /* read until not a space */
s2 = *string2++;
if (sim_isspace (s2))
s2 = ' '; /* all whitespace is a space */
else {
if (casecmp)
s2 = (unsigned char)sim_toupper (s2);
}
}
}
else { /* get new character */
s2 = *string2++;
if (sim_isspace (s2))
s2 = ' '; /* all whitespace is a space */
else {
if (casecmp)
s2 = (unsigned char)sim_toupper (s2);
}
}
if (s1 == s2) {
if (s1 == 0)
return 0;
continue;
}
if (s1 < s2)
return -1;
if (s1 > s2)
return 1;
}
return 0;
}
/* strlcat() and strlcpy() are not available on all platforms */
/* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> */
/*
* Appends src to string dst of size siz (unlike strncat, siz is the
* full size of dst, not space left). At most siz-1 characters
* will be copied. Always NUL terminates (unless siz <= strlen(dst)).
* Returns strlen(src) + MIN(siz, strlen(initial dst)).
* If retval >= siz, truncation occurred.
*/
size_t sim_strlcat(char *dst, const char *src, size_t size)
{
char *d = dst;
const char *s = src;
size_t n = size;
size_t dlen;
/* Find the end of dst and adjust bytes left but don't go past end */
while (n-- != 0 && *d != '\0')
d++;
dlen = d - dst;
n = size - dlen;
if (n == 0)
return (dlen + strlen(s));
while (*s != '\0') {
if (n != 1) {
*d++ = *s;
n--;
}
s++;
}
*d = '\0';
return (dlen + (s - src)); /* count does not include NUL */
}
/*
* Copy src to string dst of size siz. At most siz-1 characters
* will be copied. Always NUL terminates (unless siz == 0).
* Returns strlen(src); if retval >= siz, truncation occurred.
*/
size_t sim_strlcpy (char *dst, const char *src, size_t size)
{
char *d = dst;
const char *s = src;
size_t n = size;
/* Copy as many bytes as will fit */
if (n != 0) {
while (--n != 0) {
if ((*d++ = *s++) == '\0')
break;
}
}
/* Not enough room in dst, add NUL and traverse rest of src */
if (n == 0) {
if (size != 0)
*d = '\0'; /* NUL-terminate dst */
while (*s++)
;
}
return (s - src - 1); /* count does not include NUL */
}
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