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
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
|
/*
* This file contains routines for setting up characters sources from
* files. It contains code to handle the search for include files.
*/
#include "../preproc/preproc.h"
#include "../preproc/pproto.h"
#if CYGWIN
#include <limits.h>
#include <string.h>
#include <sys/cygwin.h>
#endif /* CYGWIN */
#define IsRelPath(fname) (fname[0] != '/')
static void file_src (char *fname, FILE *f);
static char **incl_search; /* standard locations to search for header files */
/*
* file_src - set up the structures for a characters source from a file,
* putting the source on the top of the stack.
*/
static void file_src(fname, f)
char *fname;
FILE *f;
{
union src_ref ref;
#if CYGWIN
char posix_path[ _POSIX_PATH_MAX + 1 ];
cygwin_conv_to_posix_path( fname, posix_path );
fname = strdup( posix_path );
#endif /* CYGWIN */
ref.cs = new_cs(fname, f, CBufSize);
push_src(CharSrc, &ref);
next_char = NULL;
fill_cbuf();
}
/*
* source - Open the file named fname or use stdin if fname is "-". fname
* is the first file from which to read input (that is, the outermost file).
*/
void source(fname)
char *fname;
{
FILE *f;
if (strcmp(fname, "-") == 0)
file_src("<stdin>", stdin);
else {
if ((f = fopen(fname, "r")) == NULL)
err2("cannot open ", fname);
file_src(fname, f);
}
}
/*
* include - open the file named fname and make it the current input file.
*/
void include(trigger, fname, system)
struct token *trigger;
char *fname;
int system;
{
struct str_buf *sbuf;
char *s;
char *path;
char *end_prfx;
struct src *sp;
struct char_src *cs;
char **prefix;
FILE *f;
/*
* See if this is an absolute path name.
*/
if (IsRelPath(fname)) {
sbuf = get_sbuf();
f = NULL;
if (!system) {
/*
* This is not a system include file, so search the locations
* of the "ancestor files".
*/
sp = src_stack;
while (f == NULL && sp != NULL) {
if (sp->flag == CharSrc) {
cs = sp->u.cs;
if (cs->f != NULL) {
/*
* This character source is a file.
*/
end_prfx = NULL;
for (s = cs->fname; *s != '\0'; ++s)
if (*s == '/')
end_prfx = s;
if (end_prfx != NULL)
for (s = cs->fname; s <= end_prfx; ++s)
AppChar(*sbuf, *s);
for (s = fname; *s != '\0'; ++s)
AppChar(*sbuf, *s);
path = str_install(sbuf);
f = fopen(path, "r");
}
}
sp = sp->next;
}
}
/*
* Search in the locations for the system include files.
*/
prefix = incl_search;
while (f == NULL && *prefix != NULL) {
for (s = *prefix; *s != '\0'; ++s)
AppChar(*sbuf, *s);
if (s > *prefix && s[-1] != '/')
AppChar(*sbuf, '/');
for (s = fname; *s != '\0'; ++s)
AppChar(*sbuf, *s);
path = str_install(sbuf);
f = fopen(path, "r");
++prefix;
}
rel_sbuf(sbuf);
}
else { /* The path is absolute. */
path = fname;
f = fopen(path, "r");
}
if (f == NULL)
errt2(trigger, "cannot open include file ", fname);
file_src(path, f);
}
/*
* init_files - Initialize this module, setting up the search path for
* system header files.
*/
void init_files(opt_lst, opt_args)
char *opt_lst;
char **opt_args;
{
int n_paths = 0;
int i, j;
char *s, *s1;
/*
* Determine the number of standard locations to search for
* header files and provide any declarations needed for the code
* that establishes these search locations.
*/
#if CYGWIN
char *incl_var;
static char *sysdir = "/usr/include";
static char *windir = "/usr/include/w32api";
n_paths = 2;
incl_var = getenv("C_INCLUDE_PATH");
if (incl_var != NULL) {
/*
* Add one entry for evry non-empty, colon-separated string in incl_var.
*/
char *dir_start, *dir_end;
dir_start = incl_var;
while( ( dir_end = strchr( dir_start, ':' ) ) != NULL ) {
if (dir_end > dir_start) ++n_paths;
dir_start = dir_end + 1;
}
if ( *dir_start != '\0' )
++n_paths; /* One path after the final ':' */
}
#else /* CYGWIN */
static char *sysdir = "/usr/include/";
n_paths = 1;
#endif /* CYGWIN */
/*
* Count the number of -I options to the preprocessor.
*/
for (i = 0; opt_lst[i] != '\0'; ++i)
if (opt_lst[i] == 'I')
++n_paths;
/*
* Set up the array of standard locations to search for header files.
*/
incl_search = alloc((n_paths + 1) * sizeof(char *));
j = 0;
/*
* Get the locations from the -I options to the preprocessor.
*/
for (i = 0; opt_lst[i] != '\0'; ++i)
if (opt_lst[i] == 'I') {
s = opt_args[i];
s1 = alloc(strlen(s) + 1);
strcpy(s1, s);
#if CYGWIN
/*
* Run s1 through cygwin_conv_to_posix_path; if the posix path
* differs from s1, reset s1 to a copy of the posix path.
*/
{
char posix_path[ _POSIX_PATH_MAX ];
cygwin_conv_to_posix_path( s1, posix_path );
if (strcmp( s1, posix_path ) != 0) {
free( s1 );
s1 = salloc( posix_path );
}
}
#endif /* CYGWIN */
incl_search[j++] = s1;
}
/*
* Establish the standard locations to search after the -I options
* on the preprocessor.
*/
#if CYGWIN
if (incl_var != NULL) {
/*
* The C_INCLUDE_PATH components are carved out of a copy of incl_var.
* The colons after non-empty directory names are replaced by null
* chars, and the pointers to the start of these names are stored
* in inc_search.
*/
char *dir_start, *dir_end;
dir_start = salloc( incl_var );
while( ( dir_end = strchr( dir_start, ':' ) ) != NULL ) {
if (dir_end > dir_start) {
incl_search[j++] = dir_start;
*dir_end = '\0';
}
dir_start = dir_end + 1;
}
if ( *dir_start != '\0' )
incl_search[j++] = dir_start;
}
/* Finally, add the system dir(s) */
incl_search[j++] = sysdir;
incl_search[j++] = windir;
#else
incl_search[n_paths - 1] = sysdir;
#endif /* CYGWIN */
incl_search[n_paths] = NULL;
}
|
