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Added lwcc, lwcpp stubs
author lost@l-w.ca
date Fri, 13 Jan 2012 22:32:15 -0700
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192:8ae2670377ca 193:68f41eaf44f2
1 /*
2
3 This is the main source for lwcpp, the C preprocessor
4
5 Copyright © 2012 William Astle
6
7 This file is part of LWTOOLS.
8
9 LWTOOLS is free software: you can redistribute it and/or modify it under the
10 terms of the GNU General Public License as published by the Free Software
11 Foundation, either version 3 of the License, or (at your option) any later
12 version.
13
14 This program is distributed in the hope that it will be useful, but WITHOUT
15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17 more details.
18
19 You should have received a copy of the GNU General Public License along with
20 this program. If not, see <http://www.gnu.org/licenses/>.
21
22 */
23
24 #include <stdio.h>
25 #include <stdlib.h>
26 #include <string.h>
27
28 #include <lw_alloc.h>
29 #include <lw_string.h>
30
31 /* command line option handling */
32 #define PROGVER "lwcpp from " PACKAGE_STRING
33 char *program_name;
34
35 /* global state */
36 char *output_file = NULL;
37 int debug_level = 0;
38
39 static void do_help(void);
40 static void do_usage(void);
41
42 /*
43 NOTE:
44
45 We can't actually use a standard option parser here due to a raft of weird
46 command line syntax and we want to be somewhat compatible with various
47 other tools. That means we have a built-in help text that is preformatted.
48
49 */
50
51 #define OPTARG(dest,src) do { char *___s = (src); if (!*___s) { if (i < argc) ___s = argv[i++]; else { fprintf(stderr, "Option %s requires an argument\n", arg); } } (dest) = ___s; } while (0)
52 static void parse_cmdline(int argc, char **argv)
53 {
54 int i = 1;
55 int eargs = 0;
56 char *arg;
57
58 while (i < argc)
59 {
60 arg = argv[i++];
61 if (!eargs && arg[0] == '-' && arg[1] != 0)
62 {
63 /* we have an option here */
64 if (arg[1] == '-' && arg[2] == 0)
65 {
66 eargs = 1;
67 continue;
68 }
69
70 /* consume the '-' */
71 arg++;
72 if (!strcmp(arg, "-help") || !strcmp(arg, "?"))
73 {
74 /* --help */
75 do_help();
76 exit(0);
77 }
78 else if (!strcmp(arg, "-usage"))
79 {
80 /* --usage */
81 do_usage();
82 exit(0);
83 }
84 else if (!strcmp(arg, "version") || !strcmp(arg, "-version"))
85 {
86 /* --version */
87 printf("%s\n", PROGVER);
88 exit(0);
89 }
90
91 switch (*arg)
92 {
93 case 'o':
94 if (output_file)
95 lw_free(output_file);
96 OPTARG(output_file, arg + 1);
97 continue;
98
99 case 'd':
100 if (!arg[1])
101 debug_level = 50;
102 else
103 debug_level = atoi(arg + 1);
104 continue;
105 }
106
107 fprintf(stderr, "Unknown option: %s\n", arg);
108 }
109 else
110 {
111 /* we have an input file here */
112 printf("Input file: %s\n", arg);
113 }
114 }
115 }
116
117 /*
118 static struct lw_cmdline_parser cmdline_parser =
119 {
120 options,
121 parse_opts,
122 "INPUTFILE",
123 "lwcc, a HD6309 and MC6809 cross-compiler\vPlease report bugs to lost@l-w.ca.",
124 PROGVER
125 };
126 */
127 int main(int argc, char **argv)
128 {
129 program_name = argv[0];
130
131 parse_cmdline(argc, argv);
132
133 if (!output_file)
134 {
135 output_file = lw_strdup("a.out");
136 }
137
138 exit(0);
139 }
140
141 void do_usage(void)
142 {
143 printf(
144 "Usage: %1$s [options] <input file>\n"
145 " %1$s --help\n"
146 " %1$s --version\n"
147 " %1$s --usage\n",
148 program_name
149 );
150 }
151
152 void do_help(void)
153 {
154 printf(
155 "Usage: %s [options] <input file>\n"
156 "lwcpp, the lwtools C preprocessor\n"
157 "\n"
158 " -d[LEVEL] enable debug output, optionally set verbosity\n"
159 " level to LEVEL\n"
160 " -o FILE specify the output file name\n"
161 " -?, --help give this help message\n"
162 " --usage print a short usage message\n"
163 " -version, --version print program version\n"
164 "\n"
165 "Please report bugs to lost@l-w.ca.\n",
166 program_name
167 );
168 }