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88bb73f0 WJ |
1 | /* |
2 | * Copyright (c) 1989 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * This code is derived from software contributed to Berkeley by | |
6 | * Ozan Yigit. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * 1. Redistributions of source code must retain the above copyright | |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. All advertising materials mentioning features or use of this software | |
17 | * must display the following acknowledgement: | |
18 | * This product includes software developed by the University of | |
19 | * California, Berkeley and its contributors. | |
20 | * 4. Neither the name of the University nor the names of its contributors | |
21 | * may be used to endorse or promote products derived from this software | |
22 | * without specific prior written permission. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
34 | * SUCH DAMAGE. | |
35 | */ | |
36 | ||
37 | #ifndef lint | |
38 | static char sccsid[] = "@(#)misc.c 5.6 (Berkeley) 2/26/91"; | |
39 | #endif /* not lint */ | |
40 | ||
41 | /* | |
42 | * misc.c | |
43 | * Facility: m4 macro processor | |
44 | * by: oz | |
45 | */ | |
46 | ||
47 | #include <unistd.h> | |
48 | #include <stdio.h> | |
49 | #include <stdlib.h> | |
50 | #include <string.h> | |
51 | #include "mdef.h" | |
52 | #include "extr.h" | |
53 | #include "pathnames.h" | |
54 | ||
55 | /* | |
56 | * indx - find the index of second str in the | |
57 | * first str. | |
58 | */ | |
59 | indx(s1, s2) | |
60 | char *s1; | |
61 | char *s2; | |
62 | { | |
63 | register char *t; | |
64 | register char *p; | |
65 | register char *m; | |
66 | ||
67 | for (p = s1; *p; p++) { | |
68 | for (t = p, m = s2; *m && *m == *t; m++, t++) | |
69 | ; | |
70 | if (!*m) | |
71 | return(p - s1); | |
72 | } | |
73 | return (-1); | |
74 | } | |
75 | ||
76 | /* | |
77 | * putback - push character back onto input | |
78 | * | |
79 | */ | |
80 | putback (c) | |
81 | char c; | |
82 | { | |
83 | if (bp < endpbb) | |
84 | *bp++ = c; | |
85 | else | |
86 | error("m4: too many characters pushed back"); | |
87 | } | |
88 | ||
89 | /* | |
90 | * pbstr - push string back onto input | |
91 | * putback is replicated to improve | |
92 | * performance. | |
93 | * | |
94 | */ | |
95 | pbstr(s) | |
96 | register char *s; | |
97 | { | |
98 | register char *es; | |
99 | register char *zp; | |
100 | ||
101 | es = s; | |
102 | zp = bp; | |
103 | ||
104 | while (*es) | |
105 | es++; | |
106 | es--; | |
107 | while (es >= s) | |
108 | if (zp < endpbb) | |
109 | *zp++ = *es--; | |
110 | if ((bp = zp) == endpbb) | |
111 | error("m4: too many characters pushed back"); | |
112 | } | |
113 | ||
114 | /* | |
115 | * pbnum - convert number to string, push back on input. | |
116 | * | |
117 | */ | |
118 | pbnum (n) | |
119 | int n; | |
120 | { | |
121 | register int num; | |
122 | ||
123 | num = (n < 0) ? -n : n; | |
124 | do { | |
125 | putback(num % 10 + '0'); | |
126 | } | |
127 | while ((num /= 10) > 0); | |
128 | ||
129 | if (n < 0) putback('-'); | |
130 | } | |
131 | ||
132 | /* | |
133 | * chrsave - put single char on string space | |
134 | * | |
135 | */ | |
136 | chrsave (c) | |
137 | char c; | |
138 | { | |
139 | /*** if (sp < 0) | |
140 | putc(c, active); | |
141 | else ***/ if (ep < endest) | |
142 | *ep++ = c; | |
143 | else | |
144 | error("m4: string space overflow"); | |
145 | } | |
146 | ||
147 | /* | |
148 | * getdiv - read in a diversion file, and | |
149 | * trash it. | |
150 | */ | |
151 | getdiv(ind) { | |
152 | register int c; | |
153 | register FILE *dfil; | |
154 | ||
155 | if (active == outfile[ind]) | |
156 | error("m4: undivert: diversion still active."); | |
157 | (void) fclose(outfile[ind]); | |
158 | outfile[ind] = NULL; | |
159 | m4temp[UNIQUE] = ind + '0'; | |
160 | if ((dfil = fopen(m4temp, "r")) == NULL) | |
161 | error("m4: cannot undivert."); | |
162 | else | |
163 | while((c = getc(dfil)) != EOF) | |
164 | putc(c, active); | |
165 | (void) fclose(dfil); | |
166 | ||
167 | if (unlink(m4temp) == -1) | |
168 | error("m4: cannot unlink."); | |
169 | } | |
170 | ||
171 | /* | |
172 | * Very fatal error. Close all files | |
173 | * and die hard. | |
174 | */ | |
175 | error(s) | |
176 | char *s; | |
177 | { | |
178 | killdiv(); | |
179 | fprintf(stderr,"%s\n",s); | |
180 | exit(1); | |
181 | } | |
182 | ||
183 | /* | |
184 | * Interrupt handling | |
185 | */ | |
186 | static char *msg = "\ninterrupted."; | |
187 | ||
188 | void | |
189 | onintr() { | |
190 | error(msg); | |
191 | } | |
192 | ||
193 | /* | |
194 | * killdiv - get rid of the diversion files | |
195 | * | |
196 | */ | |
197 | killdiv() { | |
198 | register int n; | |
199 | ||
200 | for (n = 0; n < MAXOUT; n++) | |
201 | if (outfile[n] != NULL) { | |
202 | (void) fclose (outfile[n]); | |
203 | m4temp[UNIQUE] = n + '0'; | |
204 | (void) unlink (m4temp); | |
205 | } | |
206 | } | |
207 | ||
208 | usage() { | |
209 | fprintf(stderr, "usage: m4 [-Dname[=val]] [-Uname]\n"); | |
210 | exit(1); | |
211 | } |