NASM 2.10.01
[nasm.git] / preproc-nop.c
blobb43bd809e5d70d9ca71bd8f155224f204feea014
1 /* ----------------------------------------------------------------------- *
3 * Copyright 1996-2012 The NASM Authors - All Rights Reserved
4 * See the file AUTHORS included with the NASM distribution for
5 * the specific copyright holders.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following
9 * conditions are met:
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * * Redistributions in binary form must reproduce the above
14 * copyright notice, this list of conditions and the following
15 * disclaimer in the documentation and/or other materials provided
16 * with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
19 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
20 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
29 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
30 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 * ----------------------------------------------------------------------- */
35 * This is a null preprocessor which just copies lines from input
36 * to output. It's used when someone explicitly requests that NASM
37 * not preprocess their source file.
40 #include "compiler.h"
42 #include <stdio.h>
43 #include <stdarg.h>
44 #include <stdlib.h>
45 #include <string.h>
46 #include <ctype.h>
47 #include <inttypes.h>
48 #include <limits.h>
49 #include <time.h>
51 #include "nasm.h"
52 #include "nasmlib.h"
53 #include "preproc.h"
55 #define BUF_DELTA 512
57 static FILE *nop_fp;
58 static ListGen *nop_list;
59 static int32_t nop_lineinc;
61 static void nop_reset(char *file, int pass, ListGen *listgen, StrList **deplist)
63 src_set_fname(nasm_strdup(file));
64 src_set_linnum(0);
65 nop_lineinc = 1;
66 nop_fp = fopen(file, "r");
68 if (!nop_fp)
69 nasm_error(ERR_FATAL | ERR_NOFILE,
70 "unable to open input file `%s'", file);
71 nop_list = listgen;
72 (void)pass; /* placate compilers */
74 if (deplist) {
75 StrList *sl = nasm_malloc(strlen(file)+1+sizeof sl->next);
76 sl->next = NULL;
77 strcpy(sl->str, file);
78 *deplist = sl;
82 static char *nop_getline(void)
84 char *buffer, *p, *q;
85 int bufsize;
87 bufsize = BUF_DELTA;
88 buffer = nasm_malloc(BUF_DELTA);
89 src_set_linnum(src_get_linnum() + nop_lineinc);
91 while (1) { /* Loop to handle %line */
93 p = buffer;
94 while (1) { /* Loop to handle long lines */
95 q = fgets(p, bufsize - (p - buffer), nop_fp);
96 if (!q)
97 break;
98 p += strlen(p);
99 if (p > buffer && p[-1] == '\n')
100 break;
101 if (p - buffer > bufsize - 10) {
102 int offset;
103 offset = p - buffer;
104 bufsize += BUF_DELTA;
105 buffer = nasm_realloc(buffer, bufsize);
106 p = buffer + offset;
110 if (!q && p == buffer) {
111 nasm_free(buffer);
112 return NULL;
116 * Play safe: remove CRs, LFs and any spurious ^Zs, if any of
117 * them are present at the end of the line.
119 buffer[strcspn(buffer, "\r\n\032")] = '\0';
121 if (!nasm_strnicmp(buffer, "%line", 5)) {
122 int32_t ln;
123 int li;
124 char *nm = nasm_malloc(strlen(buffer));
125 if (sscanf(buffer + 5, "%"PRId32"+%d %s", &ln, &li, nm) == 3) {
126 nasm_free(src_set_fname(nm));
127 src_set_linnum(ln);
128 nop_lineinc = li;
129 continue;
131 nasm_free(nm);
133 break;
136 nop_list->line(LIST_READ, buffer);
138 return buffer;
141 static void nop_cleanup(int pass)
143 (void)pass; /* placate GCC */
144 if (nop_fp) {
145 fclose(nop_fp);
146 nop_fp = NULL;
150 static void nop_extra_stdmac(macros_t *macros)
152 (void)macros;
155 static void nop_pre_define(char *definition)
157 (void)definition;
160 static void nop_pre_undefine(char *definition)
162 (void)definition;
165 static void nop_pre_include(char *fname)
167 (void)fname;
170 static void nop_include_path(char *path)
172 (void)path;
175 struct preproc_ops preproc_nop = {
176 nop_reset,
177 nop_getline,
178 nop_cleanup,
179 nop_extra_stdmac,
180 nop_pre_define,
181 nop_pre_undefine,
182 nop_pre_include,
183 nop_include_path