1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
/*
Copyright (C) 1994 W. Schelter
This file is part of GNU Common Lisp, herein referred to as GCL
GCL is free software; you can redistribute it and/or modify it under
the terms of the GNU LIBRARY GENERAL PUBLIC LICENSE as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GCL is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
License for more details.
You should have received a copy of the GNU Library General Public License
along with GCL; see the file COPYING. If not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdlib.h>
#include "include.h"
#include "page.h"
#undef STATIC
#define regerror gcl_regerror
static void
gcl_regerror(char *s)
{
FEerror("Regexp Error: ~a",1,make_simple_string(s));
}
#undef endp
#include "regexp.c"
#define check_string(x) \
if (type_of(x) != t_string) \
not_a_string(x)
DEFVAR("*MATCH-DATA*",sSAmatch_dataA,SI,sLnil,"");
DEFVAR("*CASE-FOLD-SEARCH*",sSAcase_fold_searchA,SI,sLnil,
"Non nil means that a string-match should ignore case");
DEFUN_NEW("MATCH-BEGINNING",object,fSmatch_beginning,SI,1,1,NONE,OI,OO,OO,OO,(fixnum i),
"Returns the beginning of the I'th match from the previous STRING-MATCH, \
where the 0th is for the whole regexp and the subsequent ones match parenthetical expressions. -1 is returned if there is no match, or if the *match-data* \
vector is not a fixnum array.")
{ object v = sSAmatch_dataA->s.s_dbind;
if (type_of(v)==t_vector
&& (v->v.v_elttype == aet_fix))
RETURN1(make_fixnum(sSAmatch_dataA->s.s_dbind->fixa.fixa_self[i]));
RETURN1(make_fixnum(-1));
}
DEFUN_NEW("MATCH-END",object,fSmatch_end,SI,1,1,NONE,OI,OO,OO,OO,(fixnum i),
"Returns the end of the I'th match from the previous STRING-MATCH")
{ object v = sSAmatch_dataA->s.s_dbind;
if (type_of(v)==t_vector
&& (v->v.v_elttype == aet_fix))
RETURN1(make_fixnum(sSAmatch_dataA->s.s_dbind->fixa.fixa_self[i+NSUBEXP]));
RETURN1(make_fixnum(-1));
}
DEFUN_NEW("COMPILE-REGEXP",object,fScompile_regexp,SI,1,1,NONE,OO,OO,OO,OO,(object p),
"Provide handle to export pre-compiled regexp's to string-match") {
char *tmp;
object res;
ufixnum i=0;
if (type_of(p)!= t_string && type_of(p)!=t_symbol)
not_a_string_or_symbol(p);
if (!(tmp=alloca(p->st.st_fillp+1)))
FEerror("out of C stack",0);
memcpy(tmp,p->st.st_self,p->st.st_fillp);
tmp[p->st.st_fillp]=0;
res=alloc_object(t_vector);
res->v.v_displaced=Cnil;
res->v.v_hasfillp=1;
res->v.v_elttype=aet_uchar;
res->v.v_adjustable=0;
res->v.v_offset=0;
res->v.v_self=NULL;
if (!(res->v.v_self=(void *)regcomp(tmp,&i)))
FEerror("regcomp failure",0);
res->v.v_fillp=res->v.v_dim=i;
RETURN1(res);
}
DEFUN_NEW("STRING-MATCH",object,fSstring_match,SI,2,4,NONE,OO,OO,OO,OO,(object pattern,object string,...),
"Match regexp PATTERN in STRING starting in string starting at START \
and ending at END. Return -1 if match not found, otherwise \
return the start index of the first matchs. The variable \
*MATCH-DATA* will be set to a fixnum array of sufficient size to hold \
the matches, to be obtained with match-beginning and match-end. \
If it already contains such an array, then the contents of it will \
be over written. \
") {
int i,ans,nargs=VFUN_NARGS,len,start,end;
static char buf[400],case_fold;
static regexp *saved_compiled_regexp;
va_list ap;
object v = sSAmatch_dataA->s.s_dbind;
char **pp,*str,save_c=0;
if (type_of(pattern)!= t_string && type_of(pattern)!=t_symbol &&
(type_of(pattern)!=t_vector || pattern->v.v_elttype!=aet_uchar))
FEerror("~S is not a regexp pattern", 1 , pattern);
if (type_of(string)!= t_string && type_of(string)!=t_symbol)
not_a_string_or_symbol(string);
if (type_of(v) != t_vector || v->v.v_elttype != aet_fix || v->v.v_dim < NSUBEXP*2)
v=sSAmatch_dataA->s.s_dbind=fSmake_vector1_1((NSUBEXP *2),aet_fix,sLnil);
start=0;
end=string->st.st_fillp;
if (nargs>2) {
va_start(ap,string);
start=fixint(va_arg(ap,object));
if (nargs>3)
end=fixint(va_arg(ap,object));
va_end(ap);
}
if (start < 0 || end > string->st.st_fillp || start > end)
FEerror("Bad start or end",0);
len=pattern->ust.ust_fillp;
if (len==0) {
/* trivial case of empty pattern */
for (i=0;i<NSUBEXP;i++)
v->fixa.fixa_self[i]=i ? -1 : 0;
memcpy(v->fixa.fixa_self+NSUBEXP,v->fixa.fixa_self,NSUBEXP*sizeof(*v->fixa.fixa_self));
RETURN1(make_fixnum(0));
}
{
regexp *compiled_regexp=saved_compiled_regexp;
BEGIN_NO_INTERRUPT;
case_fold_search = sSAcase_fold_searchA->s.s_dbind != sLnil ? 1 : 0;
if (type_of(pattern)==t_vector)
compiled_regexp=(void *)pattern->ust.ust_self;
else if (case_fold != case_fold_search || len != strlen(buf) || memcmp(pattern->ust.ust_self,buf,len))
compiled_regexp=saved_compiled_regexp=(regexp *)FFN(fScompile_regexp)(pattern)->v.v_self;
str=string->st.st_self;
if (NULL_OR_ON_C_STACK(str+end) || str+end==(void *)compiled_regexp) {
if (!(str=alloca(string->st.st_fillp+1)))
FEerror("Cannot allocate memory on C stack",0);
memcpy(str,string->st.st_self,string->st.st_fillp);
} else
save_c=str[end];
str[end]=0;
ans = regexec(compiled_regexp,str+start,str,end-start);
str[end] = save_c;
if (!ans ) {
END_NO_INTERRUPT;
RETURN1(make_fixnum(-1));
}
pp=compiled_regexp->startp;
for (i=0;i<NSUBEXP;i++,pp++)
v->fixa.fixa_self[i]=*pp ? *pp-str : -1;
pp=compiled_regexp->endp;
for (;i<2*NSUBEXP;i++,pp++)
v->fixa.fixa_self[i]=*pp ? *pp-str : -1;
END_NO_INTERRUPT;
RETURN1(make_fixnum(v->fixa.fixa_self[0]));
}
}
|
