aboutsummaryrefslogtreecommitdiffstats
path: root/asm/preproc-nop.c
blob: f885f72ee775c00e3485687e3d6650561e7f6052 (plain)
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
/* ----------------------------------------------------------------------- *
 *
 *   Copyright 1996-2016 The NASM Authors - All Rights Reserved
 *   See the file AUTHORS included with the NASM distribution for
 *   the specific copyright holders.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following
 *   conditions are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above
 *     copyright notice, this list of conditions and the following
 *     disclaimer in the documentation and/or other materials provided
 *     with the distribution.
 *
 *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
 *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
 *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * ----------------------------------------------------------------------- */

/*
 * This is a null preprocessor which just copies lines from input
 * to output. It's used when someone explicitly requests that NASM
 * not preprocess their source file.
 */

#include "compiler.h"

#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <limits.h>
#include <time.h>

#include "nasm.h"
#include "nasmlib.h"
#include "error.h"
#include "preproc.h"
#include "listing.h"

#define BUF_DELTA 512

static FILE *nop_fp;
static int32_t nop_lineinc;

static void nop_init(void)
{
    /* Nothing to do */
}

static void nop_reset(const char *file, int pass, struct strlist *deplist)
{
    src_set(0, file);
    nop_lineinc = 1;
    nop_fp = nasm_open_read(file, NF_TEXT);

    if (!nop_fp)
	nasm_fatalf(ERR_NOFILE, "unable to open input file `%s'", file);
    (void)pass;                 /* placate compilers */

    strlist_add(deplist, file);
}

static char *nop_getline(void)
{
    char *buffer, *p, *q;
    int bufsize;

    bufsize = BUF_DELTA;
    buffer = nasm_malloc(BUF_DELTA);
    src_set_linnum(src_get_linnum() + nop_lineinc);

    while (1) {                 /* Loop to handle %line */

        p = buffer;
        while (1) {             /* Loop to handle long lines */
            q = fgets(p, bufsize - (p - buffer), nop_fp);
            if (!q)
                break;
            p += strlen(p);
            if (p > buffer && p[-1] == '\n')
                break;
            if (p - buffer > bufsize - 10) {
                int offset;
                offset = p - buffer;
                bufsize += BUF_DELTA;
                buffer = nasm_realloc(buffer, bufsize);
                p = buffer + offset;
            }
        }

        if (!q && p == buffer) {
            nasm_free(buffer);
            return NULL;
        }

        /*
         * Play safe: remove CRs, LFs and any spurious ^Zs, if any of
         * them are present at the end of the line.
         */
        buffer[strcspn(buffer, "\r\n\032")] = '\0';

        if (!nasm_strnicmp(buffer, "%line", 5)) {
            int32_t ln;
            int li;
            char *nm = nasm_malloc(strlen(buffer));
            if (sscanf(buffer + 5, "%"PRId32"+%d %s", &ln, &li, nm) == 3) {
                src_set(ln, nm);
                nop_lineinc = li;
                nasm_free(nm);
                continue;
            }
            nasm_free(nm);
        }
        break;
    }

    lfmt->line(LIST_READ, buffer);

    return buffer;
}

static void nop_cleanup(int pass)
{
    (void)pass;                     /* placate GCC */
    if (nop_fp) {
        fclose(nop_fp);
        nop_fp = NULL;
    }
}

static void nop_extra_stdmac(macros_t *macros)
{
    (void)macros;
}

static void nop_pre_define(char *definition)
{
    (void)definition;
}

static void nop_pre_undefine(char *definition)
{
    (void)definition;
}

static void nop_pre_include(char *fname)
{
    (void)fname;
}

static void nop_pre_command(const char *what, char *string)
{
    (void)what;
    (void)string;
}

static void nop_include_path(struct strlist *list)
{
    (void)list;
}

static void nop_error_list_macros(errflags severity)
{
    (void)severity;
}

const struct preproc_ops preproc_nop = {
    nop_init,
    nop_reset,
    nop_getline,
    nop_cleanup,
    nop_extra_stdmac,
    nop_pre_define,
    nop_pre_undefine,
    nop_pre_include,
    nop_pre_command,
    nop_include_path,
    nop_error_list_macros,
};