LispObj *
Lisp_DeleteFile(LispBuiltin *builtin)
/*
delete-file filename
*/
{
GC_ENTER();
LispObj *filename;
filename = ARGUMENT(0);
if (STRINGP(filename)) {
filename = APPLY1(Oparse_namestring, filename);
GC_PROTECT(filename);
}
else if (STREAMP(filename)) {
if (filename->data.stream.type != LispStreamFile)
LispDestroy("%s: %s is not a FILE-STREAM",
STRFUN(builtin), STROBJ(filename));
filename = filename->data.stream.pathname;
}
else {
CHECK_PATHNAME(filename);
}
GC_LEAVE();
return (LispUnlink(THESTR(CAR(filename->data.pathname))) ? NIL : T);
}
LispObj *
Lisp_RenameFile(LispBuiltin *builtin)
/*
rename-file filename new-name
*/
{
int code;
GC_ENTER();
char *from, *to;
LispObj *old_truename, *new_truename;
LispObj *filename, *new_name;
new_name = ARGUMENT(1);
filename = ARGUMENT(0);
if (STRINGP(filename)) {
filename = APPLY1(Oparse_namestring, filename);
GC_PROTECT(filename);
}
else if (STREAMP(filename)) {
if (filename->data.stream.type != LispStreamFile)
LispDestroy("%s: %s is not a FILE-STREAM",
STRFUN(builtin), STROBJ(filename));
filename = filename->data.stream.pathname;
}
else {
CHECK_PATHNAME(filename);
}
old_truename = APPLY1(Otruename, filename);
GC_PROTECT(old_truename);
if (STRINGP(new_name)) {
new_name = APPLY3(Oparse_namestring, new_name, NIL, filename);
GC_PROTECT(new_name);
}
else {
CHECK_PATHNAME(new_name);
}
from = THESTR(CAR(filename->data.pathname));
to = THESTR(CAR(new_name->data.pathname));
code = LispRename(from, to);
if (code)
LispDestroy("%s: rename(%s, %s): %s",
STRFUN(builtin), from, to, strerror(errno));
GC_LEAVE();
new_truename = APPLY1(Otruename, new_name);
RETURN_COUNT = 2;
RETURN(0) = old_truename;
RETURN(1) = new_truename;
return (new_name);
}
/* XXX preserve-whitespace is being ignored */
LispObj *
Lisp_ReadFromString(LispBuiltin *builtin)
/*
read-from-string string &optional eof-error-p eof-value &key start end preserve-whitespace
*/
{
GC_ENTER();
char *string;
LispObj *stream, *result;
long length, start, end, bytes_read;
LispObj *ostring, *eof_error_p, *eof_value, *ostart, *oend;
oend = ARGUMENT(4);
ostart = ARGUMENT(3);
eof_value = ARGUMENT(2);
eof_error_p = ARGUMENT(1);
ostring = ARGUMENT(0);
CHECK_STRING(ostring);
string = THESTR(ostring);
LispCheckSequenceStartEnd(builtin, ostring, ostart, oend,
&start, &end, &length);
if (start > 0 || end < length)
length = end - start;
stream = LSTRINGSTREAM(string + start, STREAM_READ, length);
if (eof_value == UNSPEC)
eof_value = NIL;
LispPushInput(stream);
result = LispRead();
/* stream->data.stream.source.string->input is
* the offset of the last byte read in string */
bytes_read = stream->data.stream.source.string->input;
LispPopInput(stream);
if (result == NULL) {
if (eof_error_p == NIL)
result = eof_value;
else
LispDestroy("%s: unexpected end of input", STRFUN(builtin));
}
GC_PROTECT(result);
RETURN(0) = FIXNUM(start + bytes_read);
RETURN_COUNT = 1;
GC_LEAVE();
return (result);
}
LispObj *
Lisp_Open(LispBuiltin *builtin)
/*
open filename &key direction element-type if-exists if-does-not-exist external-format
*/
{
GC_ENTER();
char *string;
LispObj *stream = NIL;
int mode, flags, direction, exist, noexist, file_exist;
LispFile *file;
LispObj *filename, *odirection, *element_type, *if_exists,
*if_does_not_exist, *external_format;
external_format = ARGUMENT(5);
if_does_not_exist = ARGUMENT(4);
if_exists = ARGUMENT(3);
element_type = ARGUMENT(2);
odirection = ARGUMENT(1);
filename = ARGUMENT(0);
if (STRINGP(filename)) {
filename = APPLY1(Oparse_namestring, filename);
GC_PROTECT(filename);
}
else if (STREAMP(filename)) {
if (filename->data.stream.type != LispStreamFile)
LispDestroy("%s: %s is not a FILE-STREAM",
STRFUN(builtin), STROBJ(filename));
filename = filename->data.stream.pathname;
}
else {
CHECK_PATHNAME(filename);
}
if (odirection != UNSPEC) {
direction = -1;
if (KEYWORDP(odirection)) {
if (odirection == Kprobe)
direction = DIR_PROBE;
else if (odirection == Kinput)
direction = DIR_INPUT;
else if (odirection == Koutput)
direction = DIR_OUTPUT;
else if (odirection == Kio)
direction = DIR_IO;
}
if (direction == -1)
LispDestroy("%s: bad :DIRECTION %s",
STRFUN(builtin), STROBJ(odirection));
}
else
direction = DIR_INPUT;
if (element_type != UNSPEC) {
/* just check argument... */
if (SYMBOLP(element_type) &&
ATOMID(element_type) == Scharacter)
; /* do nothing */
else if (KEYWORDP(element_type) &&
ATOMID(element_type) == Sdefault)
; /* do nothing */
else
LispDestroy("%s: only :%s and %s supported for :ELEMENT-TYPE, not %s",
STRFUN(builtin), Sdefault, Scharacter, STROBJ(element_type));
}
if (if_exists != UNSPEC) {
exist = -1;
if (if_exists == NIL)
exist = EXT_NIL;
else if (KEYWORDP(if_exists)) {
if (if_exists == Kerror)
exist = EXT_ERROR;
else if (if_exists == Knew_version)
exist = EXT_NEW_VERSION;
else if (if_exists == Krename)
exist = EXT_RENAME;
else if (if_exists == Krename_and_delete)
exist = EXT_RENAME_DELETE;
else if (if_exists == Koverwrite)
exist = EXT_OVERWRITE;
else if (if_exists == Kappend)
exist = EXT_APPEND;
else if (if_exists == Ksupersede)
exist = EXT_SUPERSEDE;
}
if (exist == -1)
LispDestroy("%s: bad :IF-EXISTS %s",
STRFUN(builtin), STROBJ(if_exists));
}
else
exist = EXT_ERROR;
if (if_does_not_exist != UNSPEC) {
noexist = -1;
if (if_does_not_exist == NIL)
noexist = NOEXT_NIL;
if (KEYWORDP(if_does_not_exist)) {
if (if_does_not_exist == Kerror)
noexist = NOEXT_ERROR;
else if (if_does_not_exist == Kcreate)
noexist = NOEXT_CREATE;
}
if (noexist == -1)
LispDestroy("%s: bad :IF-DOES-NO-EXISTS %s",
STRFUN(builtin), STROBJ(if_does_not_exist));
}
else
noexist = direction != DIR_INPUT ? NOEXT_NOTHING : NOEXT_ERROR;
if (external_format != UNSPEC) {
/* just check argument... */
if (SYMBOLP(external_format) &&
ATOMID(external_format) == Scharacter)
; /* do nothing */
else if (KEYWORDP(external_format) &&
ATOMID(external_format) == Sdefault)
; /* do nothing */
else
LispDestroy("%s: only :%s and %s supported for :EXTERNAL-FORMAT, not %s",
STRFUN(builtin), Sdefault, Scharacter, STROBJ(external_format));
}
/* string representation of pathname */
string = THESTR(CAR(filename->data.pathname));
mode = 0;
file_exist = access(string, F_OK) == 0;
if (file_exist) {
if (exist == EXT_NIL) {
GC_LEAVE();
return (NIL);
}
}
else {
if (noexist == NOEXT_NIL) {
GC_LEAVE();
return (NIL);
}
if (noexist == NOEXT_ERROR)
LispDestroy("%s: file %s does not exist",
STRFUN(builtin), STROBJ(CAR(filename->data.quote)));
else if (noexist == NOEXT_CREATE) {
LispFile *tmp = LispFopen(string, FILE_WRITE);
if (tmp)
LispFclose(tmp);
else
LispDestroy("%s: cannot create file %s",
STRFUN(builtin),
STROBJ(CAR(filename->data.quote)));
}
}
if (direction == DIR_OUTPUT || direction == DIR_IO) {
if (file_exist) {
if (exist == EXT_ERROR)
LispDestroy("%s: file %s already exists",
STRFUN(builtin), STROBJ(CAR(filename->data.quote)));
if (exist == EXT_RENAME) {
/* Add an ending '~' at the end of the backup file */
char tmp[PATH_MAX + 1];
strcpy(tmp, string);
if (strlen(tmp) + 1 > PATH_MAX)
LispDestroy("%s: backup name for %s too long",
STRFUN(builtin),
STROBJ(CAR(filename->data.quote)));
strcat(tmp, "~");
if (rename(string, tmp))
LispDestroy("%s: rename: %s",
STRFUN(builtin), strerror(errno));
mode |= FILE_WRITE;
}
else if (exist == EXT_OVERWRITE)
mode |= FILE_WRITE;
else if (exist == EXT_APPEND)
mode |= FILE_APPEND;
}
else
mode |= FILE_WRITE;
if (direction == DIR_IO)
mode |= FILE_IO;
}
else
mode |= FILE_READ;
file = LispFopen(string, mode);
if (file == NULL)
LispDestroy("%s: open: %s", STRFUN(builtin), strerror(errno));
flags = 0;
if (direction == DIR_PROBE) {
LispFclose(file);
file = NULL;
}
else {
if (direction == DIR_INPUT || direction == DIR_IO)
flags |= STREAM_READ;
if (direction == DIR_OUTPUT || direction == DIR_IO)
flags |= STREAM_WRITE;
}
stream = FILESTREAM(file, filename, flags);
GC_LEAVE();
return (stream);
}
LispObj *
Lisp_Reexec(LispBuiltin *builtin)
/*
re-exec regex string &key count start end notbol noteol
*/
{
size_t nmatch;
re_mat match[10];
long start, end, length;
int code, cflags, eflags;
char *string;
LispObj *result;
re_cod *regexp;
LispObj *regex, *ostring, *count, *ostart, *oend, *notbol, *noteol;
noteol = ARGUMENT(6);
notbol = ARGUMENT(5);
oend = ARGUMENT(4);
ostart = ARGUMENT(3);
count = ARGUMENT(2);
ostring = ARGUMENT(1);
regex = ARGUMENT(0);
if (STRINGP(regex))
regexp = LispRecomp(builtin, THESTR(regex), cflags = 0);
else {
CHECK_REGEX(regex);
regexp = regex->data.regex.regex;
cflags = regex->data.regex.options;
}
CHECK_STRING(ostring);
if (count == UNSPEC)
nmatch = 1;
else {
CHECK_INDEX(count);
nmatch = FIXNUM_VALUE(count);
if (nmatch > 10)
LispDestroy("%s: COUNT cannot be larger than 10", STRFUN(builtin));
}
if (nmatch && (cflags & RE_NOSUB))
nmatch = 1;
eflags = RE_STARTEND;
if (notbol != UNSPEC && notbol != NIL)
eflags |= RE_NOTBOL;
if (noteol != UNSPEC && noteol != NIL)
eflags |= RE_NOTEOL;
string = THESTR(ostring);
LispCheckSequenceStartEnd(builtin, ostring, ostart, oend,
&start, &end, &length);
match[0].rm_so = start;
match[0].rm_eo = end;
code = reexec(regexp, string, nmatch, &match[0], eflags);
if (code == 0) {
if (nmatch && match[0].rm_eo >= match[0].rm_so) {
result = CONS(CONS(FIXNUM(match[0].rm_so),
FIXNUM(match[0].rm_eo)), NIL);
if (nmatch > 1 && match[1].rm_eo >= match[1].rm_so) {
int i;
GC_ENTER();
LispObj *cons = result;
GC_PROTECT(result);
for (i = 1;
i < nmatch && match[i].rm_eo >= match[i].rm_so;
i++) {
RPLACD(cons, CONS(CONS(FIXNUM(match[i].rm_so),
FIXNUM(match[i].rm_eo)), NIL));
cons = CDR(cons);
}
GC_LEAVE();
}
}
else
result = NIL;
}
else
result = Knomatch;
/* Maybe shoud cache compiled regex, but better the caller do it */
if (!XREGEXP(regex)) {
refree(regexp);
LispFree(regexp);
}
return (result);
}
LispObj *
Lisp_ParseInteger(LispBuiltin *builtin)
/*
parse-integer string &key start end radix junk-allowed
*/
{
GC_ENTER();
char *ptr, *string;
int character, junk, sign, overflow;
long i, start, end, radix, length, integer, check;
LispObj *result;
LispObj *ostring, *ostart, *oend, *oradix, *junk_allowed;
junk_allowed = ARGUMENT(4);
oradix = ARGUMENT(3);
oend = ARGUMENT(2);
ostart = ARGUMENT(1);
ostring = ARGUMENT(0);
start = end = radix = 0;
result = NIL;
CHECK_STRING(ostring);
LispCheckSequenceStartEnd(builtin, ostring, ostart, oend,
&start, &end, &length);
string = THESTR(ostring);
if (oradix == UNSPEC)
radix = 10;
else {
CHECK_INDEX(oradix);
radix = FIXNUM_VALUE(oradix);
}
if (radix < 2 || radix > 36)
LispDestroy("%s: :RADIX %ld must be in the range 2 to 36",
STRFUN(builtin), radix);
integer = check = 0;
ptr = string + start;
sign = overflow = 0;
/* Skip leading white spaces */
for (i = start; i < end && *ptr && isspace(*ptr); ptr++, i++)
;
/* Check for sign specification */
if (i < end && (*ptr == '-' || *ptr == '+')) {
sign = *ptr == '-';
++ptr;
++i;
}
for (junk = 0; i < end; i++, ptr++) {
character = *ptr;
if (islower(character))
character = toupper(character);
if (character >= '0' && character <= '9') {
if (character - '0' >= radix)
junk = 1;
else {
check = integer;
integer = integer * radix + character - '0';
}
}
else if (character >= 'A' && character <= 'Z') {
if (character - 'A' + 10 >= radix)
junk = 1;
else {
check = integer;
integer = integer * radix + character - 'A' + 10;
}
}
else {
if (isspace(character))
break;
junk = 1;
}
if (junk)
break;
if (!overflow && check > integer)
overflow = 1;
/* keep looping just to count read bytes */
}
if (!junk)
/* Skip white spaces */
for (; i < end && *ptr && isspace(*ptr); ptr++, i++)
;
if ((junk || ptr == string) &&
(junk_allowed == UNSPEC || junk_allowed == NIL))
LispDestroy("%s: %s has a bad integer representation",
STRFUN(builtin), STROBJ(ostring));
else if (ptr == string)
result = NIL;
else if (overflow) {
mpi *bigi = LispMalloc(sizeof(mpi));
char *str;
length = end - start + sign;
str = LispMalloc(length + 1);
strncpy(str, string - sign, length + sign);
str[length + sign] = '\0';
mpi_init(bigi);
mpi_setstr(bigi, str, radix);
LispFree(str);
result = BIGNUM(bigi);
}
else
result = INTEGER(sign ? -integer : integer);
GC_PROTECT(result);
RETURN(0) = FIXNUM(i);
RETURN_COUNT = 1;
GC_LEAVE();
return (result);
}
