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
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
|
/* vms_pp - preprocess emacs files in such a way that they can be
* compiled on VMS without warnings.
* Copyright (C) 1986 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs 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 1, or (at your option)
any later version.
GNU Emacs 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 Emacs; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Usage:
* vms_pp infile outfile
* implicit inputs:
* The file "vms_pp.trans" has the names and their translations.
* description:
* Vms_pp takes the input file and scans it, replacing the long
* names with shorter names according to the table read in from
* vms_pp.trans. The line is then written to the output file.
*
* Additionally, the "#undef foo" construct is replaced with:
* #ifdef foo
* #undef foo
* #endif
*
* The construct #if defined(foo) is replaced with
* #ifdef foo
* #define foo_VAL 1
* #else
* #define foo_VAL 0
* #endif
* #define defined(XX) XX_val
* #if defined(foo)
*
* This last contruction only works on single line #if's and takes
* advantage of a questionable C pre-processor trick. If there are
* comments within the #if, that contain "defined", then this will
* bomb.
*/
#include <stdio.h>
#define Max_table 100
#define Table_name "vms_pp.trans"
#define Word_member \
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_$"
static FILE *in,*out; /* read from, write to */
struct item { /* symbol table entries */
char *name;
char *value;
};
static struct item name_table[Max_table]; /* symbol table */
static int defined_defined = 0; /* small optimization */
main(argc,argv) int argc; char **argv; {
char buffer[1024];
if(argc != 3) { /* check argument count */
fprintf(stderr,"usage: vms_pp infile outfile");
exit();
}
init_table(); /* read in translation table */
/* open input and output files
*/
if((in = fopen(argv[1],"r")) == NULL) {
fprintf(stderr,"vms_pp: unable to open file '%s'",argv[1]);
exit();
}
if((out = fopen(argv[2],"w")) == NULL) {
fprintf(stderr,"vms_pp: unable to create file '%s'",argv[2]);
exit();
}
while(fgets(buffer,1023,in) != NULL) { /* loop through buffer until end */
process_line(buffer); /* process the line */
fputs(buffer,out); /* write out the line */
}
}
/* buy - allocate and copy a string
*/
static char *buy(str) char *str; {
char *temp;
if(!(temp = malloc(strlen(str)+1))) {
fprintf(stderr,"vms_pp: can't allocate memory");
exit();
}
strcpy(temp,str);
return temp;
}
/* gather_word - return a buffer full of the next word
*/
static char *gather_word(ptr,word) char *ptr, *word;{
for(; strchr(Word_member,*ptr); ptr++,word++)
*word = *ptr;
*word = 0;
return ptr;
}
/* skip_white - skip white space
*/
static char *skip_white(ptr) char *ptr; {
while(*ptr == ' ' || *ptr == '\t')
ptr++;
return ptr;
}
/* init_table - initialize translation table.
*/
init_table() {
char buf[256],*ptr,word[128];
FILE *in;
int i;
if((in = fopen(Table_name,"r")) == NULL) { /* open file */
fprintf(stderr,"vms_pp: can't open '%s'",Table_name);
exit();
}
for(i = 0; fgets(buf,255,in) != NULL;) { /* loop through lines */
ptr = skip_white(buf);
if(*ptr == '!') /* skip comments */
continue;
ptr = gather_word(ptr,word); /* get long word */
if(*word == 0) { /* bad entry */
fprintf(stderr,"vms_pp: bad input line '%s'\n",buf);
continue;
}
name_table[i].name = buy(word); /* set up the name */
ptr = skip_white(ptr); /* skip white space */
ptr = gather_word(ptr,word); /* get equivalent name */
if(*word == 0) { /* bad entry */
fprintf(stderr,"vms_pp: bad input line '%s'\n",buf);
continue;
}
name_table[i].value = buy(word); /* and the equivalent name */
i++; /* increment to next position */
}
for(; i < Max_table; i++) /* mark rest as unused */
name_table[i].name = 0;
}
/* process_line - do actual line processing
*/
process_line(buf) char *buf; {
char *in_ptr,*out_ptr;
char word[128],*ptr;
int len;
check_pp(buf); /* check for preprocessor lines */
for(in_ptr = out_ptr = buf; *in_ptr;) {
if(!strchr(Word_member,*in_ptr)) /* non alpha-numeric? just copy */
*out_ptr++ = *in_ptr++;
else {
in_ptr = gather_word(in_ptr,word); /* get the 'word' */
if(strlen(word) > 31) /* length is too long */
replace_word(word); /* replace the word */
for(ptr = word; *ptr; ptr++,out_ptr++) /* copy out the word */
*out_ptr = *ptr;
}
}
*out_ptr = 0;
}
/* check_pp - check for preprocessor lines
*/
check_pp(buf) char *buf; {
char *ptr,*p;
char word[128];
ptr = skip_white(buf); /* skip white space */
if(*ptr != '#') /* is this a preprocessor line? */
return; /* no, just return */
ptr = skip_white(++ptr); /* skip white */
ptr = gather_word(ptr,word); /* get command word */
if(!strcmp("undef",word)) { /* undef? */
ptr = skip_white(ptr);
ptr = gather_word(ptr,word); /* get the symbol to undef */
fprintf(out,"#ifdef %s\n",word);
fputs(buf,out);
strcpy(buf,"#endif");
return;
}
if(!strcmp("if",word)) { /* check for if */
for(;;) {
ptr = strchr(ptr,'d'); /* look for d in defined */
if(!ptr) /* are we done? */
return;
if(strchr(Word_member,*(ptr-1))){ /* at beginning of word? */
ptr++; continue; /* no, continue looking */
}
ptr = gather_word(ptr,word); /* get the word */
if(strcmp(word,"defined")) /* skip if not defined */
continue;
ptr = skip_white(ptr); /* skip white */
if(*ptr != '(') /* look for open paren */
continue; /* error, continue */
ptr++; /* skip paren */
ptr = skip_white(ptr); /* more white skipping */
ptr = gather_word(ptr,word); /* get the thing to test */
if(!*word) /* null word is bad */
continue;
fprintf(out,"#ifdef %s\n",word); /* generate the code */
fprintf(out,"#define %s_VAL 1\n",word);
fprintf(out,"#else\n");
fprintf(out,"#define %s_VAL 0\n",word);
fprintf(out,"#endif\n");
if(!defined_defined) {
fprintf(out,"#define defined(XXX) XXX/**/_VAL\n");
defined_defined = 1;
}
}
}
}
/* replace_word - look the word up in the table, and replace it
* if a match is found.
*/
replace_word(word) char *word; {
int i;
for(i = 0; i < Max_table && name_table[i].name; i++)
if(!strcmp(word,name_table[i].name)) {
strcpy(word,name_table[i].value);
return;
}
fprintf(stderr,"couldn't find '%s'\n",word);
}
|
