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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
author lost@l-w.ca
date Wed, 19 Jan 2011 22:27:17 -0700
parents
children 7317fbe024af
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-1:000000000000 0:2c24602be78f
1 /*
2 add.c
3 Copyright © 2009 William Astle
4
5 This file is part of LWAR.
6
7 LWAR is free software: you can redistribute it and/or modify it under the
8 terms of the GNU General Public License as published by the Free Software
9 Foundation, either version 3 of the License, or (at your option) any later
10 version.
11
12 This program is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 more details.
16
17 You should have received a copy of the GNU General Public License along with
18 this program. If not, see <http://www.gnu.org/licenses/>.
19
20
21 Implements the program startup code
22
23 */
24
25 #include <errno.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28
29 #include "lwar.h"
30
31 void do_add(void)
32 {
33 FILE *f;
34 unsigned char buf[8];
35 long l;
36 int c;
37 FILE *f2;
38 int i;
39
40 f = fopen(archive_file, "r+");
41 if (!f)
42 {
43 if (errno == ENOENT)
44 {
45 f = fopen(archive_file, "w");
46 if (f)
47 {
48 fputs("LWAR1V", f);
49 goto doadd;
50 }
51 }
52 perror("Cannot open archive file");
53 }
54
55 fread(buf, 1, 6, f);
56 if (memcmp("LWAR1V", buf, 6))
57 {
58 fprintf(stderr, "%s is not a valid archive file.\n", archive_file);
59 exit(1);
60 }
61
62 for (;;)
63 {
64 c = fgetc(f);
65 if (c == EOF && ferror(f))
66 {
67 perror("Reading archive file");
68 exit(1);
69 }
70 if (c == EOF)
71 goto doadd;
72
73 if (!c)
74 {
75 fseek(f, -1, SEEK_CUR);
76 goto doadd;
77 }
78
79 // find the end of the file name
80 while (c)
81 {
82 c = fgetc(f);
83 if (c == EOF || ferror(f))
84 {
85 fprintf(stderr, "Bad archive file\n");
86 exit(1);
87 }
88 }
89
90 // get length of archive member
91 l = 0;
92 c = fgetc(f);
93 l = c << 24;
94 c = fgetc(f);
95 l |= c << 16;
96 c = fgetc(f);
97 l |= c << 8;
98 c = fgetc(f);
99 l |= c;
100
101 fseek(f, l, SEEK_CUR);
102 }
103 // back up to the NUL byte at the end of the file
104 fseek(f, -1, SEEK_CUR);
105 doadd:
106 for (i = 0; i < nfiles; i++)
107 {
108 f2 = fopen(files[i], "r");
109 if (!f2)
110 {
111 fprintf(stderr, "Cannot open file %s:", files[i]);
112 perror("");
113 exit(1);
114 }
115 fread(buf, 1, 6, f2);
116 if (mergeflag && !memcmp("LWAR1V", buf, 6))
117 {
118 // add archive contents...
119 for (;;)
120 {
121 c = fgetc(f2);
122 if (c == EOF || ferror(f2))
123 {
124 perror("Reading input archive file");
125 exit(1);
126 }
127 if (c == EOF)
128 break;
129
130 if (!c)
131 {
132 break;
133 }
134
135 // find the end of the file name
136 while (c)
137 {
138 fputc(c, f);
139 c = fgetc(f2);
140 if (c == EOF || ferror(f))
141 {
142 fprintf(stderr, "Bad input archive file\n");
143 exit(1);
144 }
145 }
146 fputc(0, f);
147
148 // get length of archive member
149 l = 0;
150 c = fgetc(f2);
151 fputc(c, f);
152 l = c << 24;
153 c = fgetc(f2);
154 fputc(c, f);
155 l |= c << 16;
156 c = fgetc(f2);
157 fputc(c, f);
158 l |= c << 8;
159 c = fgetc(f2);
160 fputc(c, f);
161 l |= c;
162
163 while (l)
164 {
165 c = fgetc(f2);
166 fputc(c, f);
167 l--;
168 }
169 }
170
171 fclose(f2);
172 continue;
173 }
174 fseek(f2, 0, SEEK_END);
175 l = ftell(f2);
176 fseek(f2, 0, SEEK_SET);
177 fputs(files[i], f);
178 fputc(0, f);
179 fputc(l >> 24, f);
180 fputc((l >> 16) & 0xff, f);
181 fputc((l >> 8) & 0xff, f);
182 fputc(l & 0xff, f);
183 while (l)
184 {
185 c = fgetc(f2);
186 fputc(c, f);
187 l--;
188 }
189 }
190
191 // flag end of file
192 fputc(0, f);
193 }