1 /*
2 * Things used to handle special requests (eg. manual feed) globally or on a per
3 * page basis. Requests are passed through to the translator using the -R option.
4 * The argument to -R can be "request", "request:page", or "request:page:file".
5 * If page is omitted (as in the first form) or set to 0 request will be applied
6 * to the global environment. In all other cases it applies only to the selected
7 * page. If a file is given, page must be supplied, and the lookup is in that file
8 * rather than *requestfile.
9 */
10
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include "gen.h" /* general purpose definitions */
15 #include "ext.h"
16 #include "request.h" /* a few special definitions */
17 #include "path.h" /* for the default request file */
18
19 Request request[MAXREQUEST]; /* next page or global request */
20 int nextreq = 0; /* goes in request[nextreq] */
21 char *requestfile = REQUESTFILE; /* default lookup file */
22
23 void dumprequest(char *, char *, FILE *);
24 void writerequest(int, FILE *);
25
26 /*
27 * Save the request until we get to appropriate page - don't even bother with
28 * the lookup right now. Format of *want string is "request", "request:page", or
29 * "request:page:file", and we assume we can change the string here as needed.
30 * If page is omitted or given as 0 the request will be done globally. If *want
31 * includes a file, request and page must also be given, and in that case *file
32 * will be used for the lookup.
33 */
34 void
saverequest(want)35 saverequest(want)
36 char *want; /* grab code for this stuff */
37 {
38 char *page; /* and save it for this page */
39
40 if ( nextreq < MAXREQUEST ) {
41 request[nextreq].want = strtok(want, ": ");
42 if ( (page = strtok(NULL, ": ")) == NULL )
43 request[nextreq].page = 0;
44 else request[nextreq].page = atoi(page);
45 if ( (request[nextreq].file = strtok(NULL, ": ")) == NULL )
46 request[nextreq].file = requestfile;
47 nextreq++;
48 } else error(NON_FATAL, "too many requests - ignoring %s", want);
49 }
50
51 /*
52 * Writes out all the requests that have been saved for page. Page 0 refers to
53 * the global environment and is done during initial setup.
54 */
55 void
writerequest(page,fp_out)56 writerequest(page, fp_out)
57 int page; /* write everything for this page */
58 FILE *fp_out; /* to this file */
59 {
60 int i; /* loop index */
61
62 for ( i = 0; i < nextreq; i++ )
63 if ( request[i].page == page )
64 dumprequest(request[i].want, request[i].file, fp_out);
65 }
66
67 /*
68 * Looks for *want in the request file and if it's found the associated value
69 * is copied to the output file. Keywords (ie. the *want strings) begin an @ in
70 * the first column of file, while the values (ie. the stuff that's copied to
71 * the output file) starts on the next line and extends to the next keyword or
72 * to the end of file.
73 */
74 void
dumprequest(want,file,fp_out)75 dumprequest(want, file, fp_out)
76 char *want; /* look for this string */
77 char *file; /* in this file */
78 FILE *fp_out; /* and write the value out here */
79 {
80 char buf[100]; /* line buffer for reading *file */
81 FILE *fp_in;
82
83 if ( (fp_in = fopen(file, "r")) != NULL ) {
84 while ( fgets(buf, sizeof(buf), fp_in) != NULL )
85 if ( buf[0] == '@' && strncmp(want, &buf[1], strlen(want)) == 0 )
86 while ( fgets(buf, sizeof(buf), fp_in) != NULL )
87 if ( buf[0] == '#' || buf[0] == '%' )
88 continue;
89 else if ( buf[0] != '@' )
90 fprintf(fp_out, "%s", buf);
91 else break;
92 fclose(fp_in);
93 }
94 }
95