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
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
/* $Xorg: cppsetup.c,v 1.5 2001/02/09 02:03:16 xorgcvs Exp $ */
/*
Copyright (c) 1993, 1994, 1998 The Open Group
Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.
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 THE
OPEN GROUP 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 The Open Group shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from The Open Group.
*/
/* $XFree86$ */
#include "def.h"
#ifdef CPP
/*
* This file is strictly for the sake of cpy.y and yylex.c (if
* you indeed have the source for cpp).
*/
#define IB 1
#define SB 2
#define NB 4
#define CB 8
#define QB 16
#define WB 32
#define SALT '#'
#if defined(pdp11) || defined(vax) || defined(ns16000) || defined(mc68000) || defined(ibm032)
#define COFF 128
#else
#define COFF 0
#endif
/*
* These variables used by cpy.y and yylex.c
*/
extern char *outp, *inp, *newp, *pend;
extern char *ptrtab;
extern char fastab[];
extern char slotab[];
/*
* cppsetup
*/
struct filepointer *currentfile;
struct inclist *currentinc;
int
cppsetup(char *line, struct filepointer *filep, struct inclist *inc)
{
char *p, savec;
static boolean setupdone = FALSE;
boolean value;
if (!setupdone) {
cpp_varsetup();
setupdone = TRUE;
}
currentfile = filep;
currentinc = inc;
inp = newp = line;
for (p=newp; *p; p++)
;
/*
* put a newline back on the end, and set up pend, etc.
*/
*p++ = '\n';
savec = *p;
*p = '\0';
pend = p;
ptrtab = slotab+COFF;
*--inp = SALT;
outp=inp;
value = yyparse();
*p = savec;
return(value);
}
struct symtab **lookup(symbol)
char *symbol;
{
static struct symtab *undefined;
struct symtab **sp;
sp = isdefined(symbol, currentinc, NULL);
if (sp == NULL) {
sp = &undefined;
(*sp)->s_value = NULL;
}
return (sp);
}
pperror(tag, x0,x1,x2,x3,x4)
int tag,x0,x1,x2,x3,x4;
{
warning("\"%s\", line %d: ", currentinc->i_file, currentfile->f_line);
warning(x0,x1,x2,x3,x4);
}
yyerror(s)
register char *s;
{
fatalerr("Fatal error: %s\n", s);
}
#else /* not CPP */
#include "ifparser.h"
struct _parse_data {
struct filepointer *filep;
struct inclist *inc;
char *filename;
const char *line;
};
static const char *
my_if_errors (IfParser *ip, const char *cp, const char *expecting)
{
struct _parse_data *pd = (struct _parse_data *) ip->data;
int lineno = pd->filep->f_line;
char *filename = pd->filename;
char prefix[300];
int prefixlen;
int i;
sprintf (prefix, "\"%s\":%d", filename, lineno);
prefixlen = strlen(prefix);
fprintf (stderr, "%s: %s", prefix, pd->line);
i = cp - pd->line;
if (i > 0 && pd->line[i-1] != '\n') {
putc ('\n', stderr);
}
for (i += prefixlen + 3; i > 0; i--) {
putc (' ', stderr);
}
fprintf (stderr, "^--- expecting %s\n", expecting);
return NULL;
}
#define MAXNAMELEN 256
static struct symtab **
lookup_variable (IfParser *ip, const char *var, int len)
{
char tmpbuf[MAXNAMELEN + 1];
struct _parse_data *pd = (struct _parse_data *) ip->data;
if (len > MAXNAMELEN)
return 0;
strncpy (tmpbuf, var, len);
tmpbuf[len] = '\0';
return isdefined (tmpbuf, pd->inc, NULL);
}
static int
my_eval_defined (IfParser *ip, const char *var, int len)
{
if (lookup_variable (ip, var, len))
return 1;
else
return 0;
}
#define isvarfirstletter(ccc) (isalpha(ccc) || (ccc) == '_')
static long
my_eval_variable (IfParser *ip, const char *var, int len)
{
long val;
struct symtab **s;
s = lookup_variable (ip, var, len);
if (!s)
return 0;
do {
var = (*s)->s_value;
if (!isvarfirstletter(*var) || !strcmp((*s)->s_name, var))
break;
s = lookup_variable (ip, var, strlen(var));
} while (s);
var = ParseIfExpression(ip, var, &val);
if (var && *var) debug(4, ("extraneous: '%s'\n", var));
return val;
}
int
cppsetup(char *filename,
char *line,
struct filepointer *filep,
struct inclist *inc)
{
IfParser ip;
struct _parse_data pd;
long val = 0;
pd.filep = filep;
pd.inc = inc;
pd.line = line;
pd.filename = filename;
ip.funcs.handle_error = my_if_errors;
ip.funcs.eval_defined = my_eval_defined;
ip.funcs.eval_variable = my_eval_variable;
ip.data = (char *) &pd;
(void) ParseIfExpression (&ip, line, &val);
if (val)
return IF;
else
return IFFALSE;
}
#endif /* CPP */
|
