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
|
/* This file is part of GNU Pies.
Copyright (C) 2015-2023 Sergey Poznyakoff
GNU Pies is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Pies 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Pies. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include <stdlib.h>
#include <string.h>
#include <grecs.h>
#include <sysexits.h>
#include <wordsplit.h>
static struct grecs_txtacc *pp_cmd;
static char const *pp_path;
void
pp_init (char const *path)
{
pp_path = path;
}
void
pp_add_option (const char *opt, const char *arg)
{
if (!pp_cmd)
{
if (!grecs_preprocessor)
{
grecs_error (NULL, 0, _("no preprocessor configured"));
exit (EX_CONFIG);
}
pp_cmd = grecs_txtacc_create ();
}
grecs_txtacc_grow_char (pp_cmd, ' ');
grecs_txtacc_grow_string (pp_cmd, opt);
if (arg)
{
grecs_txtacc_grow_char (pp_cmd, '\'');
for (; *arg; ++arg)
{
if (*arg == '\'')
grecs_txtacc_grow_string (pp_cmd, "'\\''");
else
grecs_txtacc_grow (pp_cmd, arg, 1);
}
grecs_txtacc_grow_char (pp_cmd, '\'');
}
}
/*
* Build and return the preprocessor command line.
*/
char *
pp_command_line (void)
{
char *ret;
size_t len, pplen;
if (!pp_cmd)
{
if (!grecs_preprocessor)
return NULL;
/* Initialize pp_cmd */
pp_cmd = grecs_txtacc_create ();
}
/* Append the default search path options. */
if (pp_path)
{
struct wordsplit ws;
ws.ws_delim = ":";
if (wordsplit (pp_path, &ws,
WRDSF_DELIM |
WRDSF_ENOMEMABRT |
WRDSF_SHOWERR |
WRDSF_NOCMD |
WRDSF_NOVAR) == 0)
{
size_t i;
for (i = 0; i < ws.ws_wordc; i++)
pp_add_option ("-I", ws.ws_wordv[i]);
}
wordsplit_free (&ws);
}
/*
* Insert preprocessor command before its options.
* Since grecs_txtacc interface makes no provision for inserting text
* at the beginning, this is done as follows:
*
* 1. Terminating \0 is appended.
* 2. The preprocessor command line is appended *to the end* of the
* buffer to make sure sufficient space is allocated.
* 3. The txtacc is finalized. This returns allocated array of
* characters with the preprocessor name appended after the \0
* character.
* 4. The resulting array is shifted N bytes to the right, where
* N is the length of the preprocessor command plus one. Now
* terminating \0 occupies the last byte of the allocated memory.
* 5. Preprocessor command is placed at the beginning of the array,
* filling in the space provided in previous step.
*/
grecs_txtacc_grow_char (pp_cmd, 0);
grecs_txtacc_grow_string (pp_cmd, grecs_preprocessor);
ret = grecs_txtacc_finish (pp_cmd, 1);
len = strlen (ret);
pplen = strlen (grecs_preprocessor);
memmove (ret + pplen, ret, len + 1);
memcpy (ret, grecs_preprocessor, pplen);
grecs_txtacc_free (pp_cmd);
pp_cmd = NULL;
return ret;
}
|