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
|
% -*- mode: Noweb; noweb-code-mode: c-mode -*-
% Copyright 1991 by Norman Ramsey. All rights reserved.
% See file COPYRIGHT for more information.
\subsection{Expanding multiple files from a single source}
This main program is used to make the monolithic {\tt noweb}
script efficient.
Tips of the hat to Ross Williams and Preston Briggs.
<<*>>=
static char rcsid[] = "$Id: mnt.nw,v 1.22 2008/10/06 01:03:05 nr Exp nr $";
static char rcsname[] = "$Name: v2_12 $";
static struct keepalive { char *s; struct keepalive *p; } keepalive[] =
{ {rcsid, keepalive}, {rcsname, keepalive} }; /* avoid warnings */
#define _POSIX_C_SOURCE 200809L
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <ctype.h>
#include "modules.h"
#include "modtrees.h"
#include "notangle.h"
#include "errors.h"
#include "columns.h"
#include "strsave.h"
<<local prototypes>>
#define Clocformat "#line %L \"%F\"%N"
static char *locformat = Clocformat;
int main(int argc, char **argv) {
int i;
tabsize = 0; /* default for nt is not to use tabs */
progname = argv[0];
finalstage = 1;
<<read standard input into tree>>
for (i=1; i<argc; i++)
switch (*argv[i]) {
case '-': <<handle option in [[argv[i]]]>> break;
default: emitfile(argv[i]); break;
}
nowebexit(NULL);
return errorlevel; /* slay warning */
}
@
<<read standard input into tree>>=
read_defs(stdin);
apply_each_module(remove_final_newline);
<<write out all conforming roots>>=
apply_each_module(add_uses_to_usecounts);
apply_each_module(emit_if_unused_and_conforming);
<<local prototypes>>=
void add_uses_to_usecounts(Module mp);
void emit_if_unused_and_conforming(Module mp);
<<*>>=
void add_uses_to_usecounts(Module mp) {
Module used;
struct modpart *p;
for (p=mp->head; p!=NULL; p=p->next)
if (p->ptype == MODULE) {
used = lookup(p->contents);
if (used != NULL)
used->usecount++;
}
}
@
A conforming output chunk name has no spaces and no metacharacters.
Names with spaces are silently ignored, but names that are otherwise
conforming but that contain metacharacters cause complaints.
<<*>>=
void emit_if_unused_and_conforming(Module mp) {
char *index;
if (mp->usecount == 0 && strpbrk(mp->name, " \n\t\v\r\f") == NULL) {
if (index = strpbrk(mp->name, "[](){}!$&<>*?;|^`'\\\""),
index == NULL || (index[0] == '*' && index[1] == 0)) {
if (index == mp->name)
errormsg(Error, "@<<*@>> is not a good chunk name for noweb; "
"use notangle instead");
else
emitfile(mp->name);
} else {
errormsg(Error, "@<<%s@>> cannot be an output chunk; "
"it contains a metacharacter", mp->name);
}
}
}
<<local prototypes>>=
static void emitfile(char *modname);
<<*>>=
static void emitfile(char *modname) {
Module root = lookup(modname);
FILE *fp = tmpfile();
char *lfmt, *filename;
<<set [[lfmt]] and [[filename]] from [[modname]]>>
<<complain and [[return]] if [[root == NULL]]>>
if (fp == NULL) errormsg(Fatal, "Calling tmpfile() failed");
<<expand [[root]] onto [[fp]]>>
rewind(fp);
<<if file [[filename]] has the same contents as [[fp]], close [[fp]] and [[return]]>>
remove(filename);
fclose(fp);
fp = fopen(filename, "w");
if (fp == NULL) {<<complain about [[filename]] and [[return]]>>}
<<expand [[root]] onto [[fp]]>>
fclose(fp);
}
<<set [[lfmt]] and [[filename]] from [[modname]]>>=
{ int n = strlen(modname) - 1;
if (n >= 0 && modname[n] == '*') {
lfmt = locformat;
filename = strsave(modname);
filename[n] = 0;
} else {
lfmt = "";
filename = modname;
}
}
<<expand [[root]] onto [[fp]]>>=
resetloc();
(void) expand(root, 0, 0, 0, lfmt, fp);
putc('\n', fp);
@
<<if file [[filename]] has the same contents as [[fp]], close [[fp]] and [[return]]>>=
{ FILE *dest = fopen(filename, "r");
if (dest != NULL) {
int x, y;
do {
x = getc(fp);
y = getc(dest);
} while (x == y && x != EOF);
fclose(dest);
if (x == y) {
fclose(fp);
return;
}
}
}
<<complain about [[filename]] and [[return]]>>=
errormsg(Error, "Can't open output file %s", filename);
return;
<<complain and [[return]] if [[root == NULL]]>>=
if (root == NULL) {
errormsg(Error, "Chunk @<<%s@>> is undefined", filename);
return;
}
<<handle option in [[argv[i]]]>>=
switch (*++argv[i]) {
case 'a':
if (strcmp(argv[i], "all"))
errormsg(Warning, "Ignoring unknown option -%s", argv[i]);
else {<<write out all conforming roots>>}
break;
case 't': /* set tab size or turn off */
if (isdigit(argv[i][1]))
tabsize = atoi(argv[i]+1);
else if (argv[i][1]==0)
tabsize = 0; /* no tabs */
else
errormsg(Error, "%s: ill-formed option %s\n", argv[0], argv[i]);
break;
case 'L': /* have a #line number format */
locformat = argv[i] + 1;
if (!*locformat) locformat = Clocformat;
break;
default:
errormsg(Warning, "Ignoring unknown option -%s", argv[i]);
}
@
|
