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
34 typedef 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
42 yasm_preproc_module yasm_raw_LTX_preproc;
43
44 static yasm_preproc *
raw_preproc_create(const char * in_filename,yasm_symtab * symtab,yasm_linemap * lm,yasm_errwarns * errwarns)45 raw_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
67 static void
raw_preproc_destroy(yasm_preproc * preproc)68 raw_preproc_destroy(yasm_preproc *preproc)
69 {
70 yasm_xfree(preproc);
71 }
72
73 static char *
raw_preproc_get_line(yasm_preproc * preproc)74 raw_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
117 static size_t
raw_preproc_get_included_file(yasm_preproc * preproc,char * buf,size_t max_size)118 raw_preproc_get_included_file(yasm_preproc *preproc, char *buf,
119 size_t max_size)
120 {
121 /* no included files */
122 return 0;
123 }
124
125 static void
raw_preproc_add_include_file(yasm_preproc * preproc,const char * filename)126 raw_preproc_add_include_file(yasm_preproc *preproc, const char *filename)
127 {
128 /* no pre-include files */
129 }
130
131 static void
raw_preproc_predefine_macro(yasm_preproc * preproc,const char * macronameval)132 raw_preproc_predefine_macro(yasm_preproc *preproc, const char *macronameval)
133 {
134 /* no pre-defining macros */
135 }
136
137 static void
raw_preproc_undefine_macro(yasm_preproc * preproc,const char * macroname)138 raw_preproc_undefine_macro(yasm_preproc *preproc, const char *macroname)
139 {
140 /* no undefining macros */
141 }
142
143 static void
raw_preproc_define_builtin(yasm_preproc * preproc,const char * macronameval)144 raw_preproc_define_builtin(yasm_preproc *preproc, const char *macronameval)
145 {
146 /* no builtin defines */
147 }
148
149 static void
raw_preproc_add_standard(yasm_preproc * preproc,const char ** macros)150 raw_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 */
157 yasm_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