Commit | Line | Data |
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c65df279 | 1 | /* -*-c-*- |
c65df279 | 2 | * |
3 | * Subcommand infrastructure | |
4 | * | |
5 | * (c) 2004 Straylight/Edgeware | |
6 | */ | |
7 | ||
45c0fd36 | 8 | /*----- Licensing notice --------------------------------------------------* |
c65df279 | 9 | * |
10 | * This file is part of Catacomb. | |
11 | * | |
12 | * Catacomb is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU Library General Public License as | |
14 | * published by the Free Software Foundation; either version 2 of the | |
15 | * License, or (at your option) any later version. | |
45c0fd36 | 16 | * |
c65df279 | 17 | * Catacomb is distributed in the hope that it will be useful, |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU Library General Public License for more details. | |
45c0fd36 | 21 | * |
c65df279 | 22 | * You should have received a copy of the GNU Library General Public |
23 | * License along with Catacomb; if not, write to the Free | |
24 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
25 | * MA 02111-1307, USA. | |
26 | */ | |
27 | ||
28 | /*----- Header files ------------------------------------------------------*/ | |
29 | ||
cd6eca43 MW |
30 | #define _FILE_OFFSET_BITS 64 |
31 | ||
c65df279 | 32 | #include <mLib/quis.h> |
33 | #include <mLib/report.h> | |
34 | ||
35 | #include "cc.h" | |
36 | ||
37 | /*----- Main code ---------------------------------------------------------*/ | |
38 | ||
39 | /* --- @findcmd@ --- * | |
40 | * | |
41 | * Arguments: @const cmd *cmds@ = pointer to command table | |
42 | * @const char *name@ = a command name | |
43 | * | |
44 | * Returns: Pointer to the command structure. | |
45 | * | |
46 | * Use: Looks up a command by name. If the command isn't found, an | |
47 | * error is reported and the program is terminated. | |
48 | */ | |
49 | ||
50 | const cmd *findcmd(const cmd *cmds, const char *name) | |
51 | { | |
52 | const cmd *c, *chosen = 0; | |
53 | size_t sz = strlen(name); | |
54 | ||
55 | for (c = cmds; c->name; c++) { | |
56 | if (strncmp(name, c->name, sz) == 0) { | |
57 | if (c->name[sz] == 0) { | |
58 | chosen = c; | |
59 | break; | |
60 | } else if (chosen) | |
61 | die(EXIT_FAILURE, "ambiguous command name `%s'", name); | |
62 | else | |
63 | chosen = c; | |
64 | } | |
65 | } | |
66 | if (!chosen) | |
67 | die(EXIT_FAILURE, "unknown command name `%s'", name); | |
68 | return (chosen); | |
69 | } | |
70 | ||
71 | /* --- @sc_help@ --- * | |
72 | * | |
73 | * Arguments: @const cmd *cmds@ = pointer to command table | |
74 | * @FILE *fp@ = output file handle | |
75 | * @char *const *argv@ = remaining arguments | |
76 | * | |
77 | * Returns: --- | |
78 | * | |
79 | * Use: Prints a help message, maybe with help about subcommands. | |
80 | */ | |
81 | ||
82 | void sc_help(const cmd *cmds, FILE *fp, char *const *argv) | |
83 | { | |
84 | const cmd *c; | |
85 | ||
86 | version(fp); | |
87 | fputc('\n', fp); | |
88 | if (!*argv) { | |
89 | help_global(fp); | |
90 | fputs("\n\ | |
91 | The following commands are understood:\n\n", | |
92 | fp); | |
93 | for (c = cmds; c->name; c++) | |
94 | fprintf(fp, "%s\n", c->usage); | |
95 | } else { | |
96 | while (*argv) { | |
97 | c = findcmd(cmds, *argv); | |
98 | fprintf(fp, "Usage: %s [-OPTIONS] %s\n", QUIS, c->usage); | |
99 | if (c->help) { | |
45c0fd36 | 100 | fputc('\n', fp); |
c65df279 | 101 | pquis(fp, c->help); |
102 | } | |
103 | argv++; | |
104 | if (*argv) fputc('\n', fp); | |
105 | } | |
106 | } | |
107 | } | |
108 | ||
109 | /*----- That's all, folks -------------------------------------------------*/ |