1/*
2 * Raw preprocessor (preforms NO preprocessing)
3 *
4 *  Copyright (C) 2001-2007  Peter Johnson
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND OTHER CONTRIBUTORS ``AS IS''
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR OTHER CONTRIBUTORS BE
19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25 * POSSIBILITY OF SUCH DAMAGE.
26 */
27#include <util.h>
28
29#include <libyasm.h>
30
31
32#define BSIZE 512
33
34typedef struct yasm_preproc_raw {
35    yasm_preproc_base preproc;   /* base structure */
36
37    FILE *in;
38    yasm_linemap *cur_lm;
39    yasm_errwarns *errwarns;
40} yasm_preproc_raw;
41
42yasm_preproc_module yasm_raw_LTX_preproc;
43
44static yasm_preproc *
45raw_preproc_create(const char *in_filename, yasm_symtab *symtab,
46                   yasm_linemap *lm, yasm_errwarns *errwarns)
47{
48    FILE *f;
49    yasm_preproc_raw *preproc_raw = yasm_xmalloc(sizeof(yasm_preproc_raw));
50
51    if (strcmp(in_filename, "-") != 0) {
52        f = fopen(in_filename, "r");
53        if (!f)
54            yasm__fatal( N_("Could not open input file") );
55    }
56    else
57        f = stdin;
58
59    preproc_raw->preproc.module = &yasm_raw_LTX_preproc;
60    preproc_raw->in = f;
61    preproc_raw->cur_lm = lm;
62    preproc_raw->errwarns = errwarns;
63
64    return (yasm_preproc *)preproc_raw;
65}
66
67static void
68raw_preproc_destroy(yasm_preproc *preproc)
69{
70    yasm_xfree(preproc);
71}
72
73static char *
74raw_preproc_get_line(yasm_preproc *preproc)
75{
76    yasm_preproc_raw *preproc_raw = (yasm_preproc_raw *)preproc;
77    int bufsize = BSIZE;
78    char *buf = yasm_xmalloc((size_t)bufsize);
79    char *p;
80
81    /* Loop to ensure entire line is read (don't want to limit line length). */
82    p = buf;
83    for (;;) {
84        if (!fgets(p, bufsize-(p-buf), preproc_raw->in)) {
85            if (ferror(preproc_raw->in)) {
86                yasm_error_set(YASM_ERROR_IO,
87                               N_("error when reading from file"));
88                yasm_errwarn_propagate(preproc_raw->errwarns,
89                    yasm_linemap_get_current(preproc_raw->cur_lm));
90            }
91            break;
92        }
93        p += strlen(p);
94        if (p > buf && p[-1] == '\n')
95            break;
96        if ((p-buf)+1 >= bufsize) {
97            /* Increase size of buffer */
98            char *oldbuf = buf;
99            bufsize *= 2;
100            buf = yasm_xrealloc(buf, (size_t)bufsize);
101            p = buf + (p-oldbuf);
102        }
103    }
104
105    if (p == buf) {
106        /* No data; must be at EOF */
107        yasm_xfree(buf);
108        return NULL;
109    }
110
111    /* Strip the line ending */
112    buf[strcspn(buf, "\r\n")] = '\0';
113
114    return buf;
115}
116
117static size_t
118raw_preproc_get_included_file(yasm_preproc *preproc, char *buf,
119                              size_t max_size)
120{
121    /* no included files */
122    return 0;
123}
124
125static void
126raw_preproc_add_include_file(yasm_preproc *preproc, const char *filename)
127{
128    /* no pre-include files */
129}
130
131static void
132raw_preproc_predefine_macro(yasm_preproc *preproc, const char *macronameval)
133{
134    /* no pre-defining macros */
135}
136
137static void
138raw_preproc_undefine_macro(yasm_preproc *preproc, const char *macroname)
139{
140    /* no undefining macros */
141}
142
143static void
144raw_preproc_define_builtin(yasm_preproc *preproc, const char *macronameval)
145{
146    /* no builtin defines */
147}
148
149static void
150raw_preproc_add_standard(yasm_preproc *preproc, const char **macros)
151{
152    /* no standard macros */
153}
154
155
156/* Define preproc structure -- see preproc.h for details */
157yasm_preproc_module yasm_raw_LTX_preproc = {
158    "Disable preprocessing",
159    "raw",
160    raw_preproc_create,
161    raw_preproc_destroy,
162    raw_preproc_get_line,
163    raw_preproc_get_included_file,
164    raw_preproc_add_include_file,
165    raw_preproc_predefine_macro,
166    raw_preproc_undefine_macro,
167    raw_preproc_define_builtin,
168    raw_preproc_add_standard
169};
170