summaryrefslogtreecommitdiff
path: root/pith/helpindx.c
blob: 2be8eae42d42f8af37c9af7e036d54aadaee1779 (plain)
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
#if !defined(lint) && !defined(DOS)
static char rcsid[] = "$Id: helpindx.c 769 2007-10-24 00:15:40Z hubert@u.washington.edu $";
#endif

/*
 * ========================================================================
 * Copyright 2006-2007 University of Washington
 * Copyright 2013-2017 Eduardo Chappa
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * ========================================================================
 */

/*
 * very short, very specialized
 *
 *
 *
 */

#include "system.h"

#define	HELP_KEY_MAX	64		/* maximum length of a key */

struct hindx {
    char  key[HELP_KEY_MAX];		/* name of help section */
    long  offset;			/* where help text starts */
    short lines;			/* how many lines there are */
};

int
main(int argc, char **argv)
{
    char *p, s[1024];
    long index;
    int  section, 
	 len, 
	 line,
	 i; 
    FILE *hp,
	 *hip,					/* help index ptr */
    	 *hhp;					/* help header ptr */
    struct hindx irec;

    if(argc < 4){
	fprintf(stderr,
		"usage: helpindx <help_file> <index_file> <header_file>\n");
	exit(-1);
    }

    if((hp = fopen(argv[1], "rb")) == NULL){	/* problems */
	perror(argv[1]);
        exit(-1);
    }

    if((hip = fopen(argv[2], "wb")) == NULL){	/* problems */
	perror(argv[2]);
        exit(-1);
    }

    if((hhp = fopen(argv[3], "w")) == NULL){	/* problems */
	perror(argv[3]);
        exit(-1);
    }

    fprintf(hhp,"/*\n * Alpine Help text header file\n */\n");
    fprintf(hhp,"\n#ifndef PITH_HELPTEXT_INCLUDED\n#define PITH_HELPTEXT_INCLUDED\n");
    fprintf(hhp,"\n#define\tHELP_KEY_MAX\t%d\n", HELP_KEY_MAX);
    fprintf(hhp,"\ntypedef\tshort\tHelpType;\n");
    fprintf(hhp,"\n#define\tNO_HELP\t(-1)\n");
    fprintf(hhp,"struct hindx {\n    char  key[HELP_KEY_MAX];");
    fprintf(hhp,"\t\t/* name of help section */\n");
    fprintf(hhp,"    long  offset;\t\t\t/* where help text starts */\n");
    fprintf(hhp,"    short lines;\t\t\t/* how many lines there are */\n");
    fprintf(hhp,"};\n\n\n/*\n * defs for help section titles\n */\n");

    index = 0L;
    line  = section = 0;

    while(fgets(s, sizeof(s) - 1, hp) != NULL){
	line++;
	len = strlen(s);
	if(s[0] == '='){			/* new section? */
	    i = 0;
	    while((s[i] == '=' || isspace((unsigned char)s[i])) && i < len)
		i++;

	    if(section)
	        fwrite(&irec, sizeof(struct hindx), 1, hip);

	    irec.offset = index + (long)i;	/* save where name starts */
	    irec.lines = 0;
	    p = &irec.key[0];			/* save name field */
	    while(!isspace((unsigned char)s[i]) && i < len)
		*p++ = s[i++];
	    *p = '\0';
	
	    if(irec.key[0] == '\0'){
		fprintf(stderr,"Invalid help line %d: %s", line, s);
		exit(-1);
	    }
	    else
	      fprintf(hhp, "#define\t%s\t%d\n", irec.key, section++);

	}
	else if(s[0] == '#' && section){
	    fprintf(stderr,"Comments not allowed in help text: line %d", line);
	    exit(-1);
	}
	else{
	    irec.lines++;
	}
	index += len;
    }

    if(section)				/* write last entry */
      fwrite(&irec, sizeof(struct hindx), 1, hip);

    fprintf(hhp, "#define\tLASTHELP\t%d\n", section);

    fprintf(hhp,"\n#endif /* PITH_HELPTEXT_INCLUDED */\n");

    fclose(hp);
    fclose(hip);
    fclose(hhp);
    exit(0);
}