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7bd7fa83 TB |
1 | /* Copyright (C) 2018 Thomas Balzer */ |
2 | ||
3 | /* This file is part of tomd. */ | |
4 | ||
5 | /* tomd is free software: you can redistribute it and/or modify */ | |
6 | /* it under the terms of the GNU General Public License as published by */ | |
7 | /* the Free Software Foundation, either version 3 of the License, or */ | |
8 | /* (at your option) any later version. */ | |
9 | ||
10 | /* tomd is distributed in the hope that it will be useful, */ | |
11 | /* but WITHOUT ANY WARRANTY; without even the implied warranty of */ | |
12 | /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ | |
13 | /* GNU General Public License for more details. */ | |
14 | ||
15 | /* You should have received a copy of the GNU General Public License */ | |
16 | /* along with tomd. If not, see <http://www.gnu.org/licenses/>. */ | |
17 | ||
18 | #include <stdio.h> | |
19 | #include <stdlib.h> | |
20 | #include <string.h> | |
21 | #include <unistd.h> | |
22 | #include <sys/un.h> | |
23 | #include <sys/socket.h> | |
24 | ||
25 | #define MAX_LEN 1024 | |
26 | ||
27 | struct line{ | |
28 | char *buf; | |
29 | struct line *next; | |
30 | }; | |
31 | ||
32 | static struct{ | |
33 | char *buf; | |
34 | int sfd; | |
35 | struct line *lines; | |
36 | }options; | |
37 | ||
38 | void setup_socket(int sfd) | |
39 | { | |
40 | options.sfd = sfd; | |
41 | options.buf = malloc(sizeof(char) * MAX_LEN); | |
42 | } | |
43 | ||
1110e851 | 44 | static struct line *find_lines(int size) |
7bd7fa83 TB |
45 | { |
46 | /* printf("entering find_lines\n"); */ | |
47 | struct line *lines = malloc(sizeof(struct line)); | |
48 | struct line *cur_line = lines; | |
49 | struct line *old_line = lines; | |
50 | char *ptr = options.buf; | |
51 | lines->buf = options.buf; | |
52 | lines->next = NULL; | |
1110e851 | 53 | int c = 0; |
7bd7fa83 TB |
54 | /* printf("starting loop.\n"); */ |
55 | while(1){ | |
1110e851 TB |
56 | if(c >= size){ |
57 | /* printf("killing read at end of reported read.\n"); */ | |
58 | /* printf("(3) used [%d] of [%d]\n", c, size); */ | |
59 | /* maybe put a null at end of cur_line->buf */ | |
60 | return lines; | |
61 | } | |
7bd7fa83 TB |
62 | if(*ptr == '\n' || *ptr == '\0'){ |
63 | /* printf("----\n"); */ | |
64 | /* printf("found a new line.\n"); */ | |
65 | /* printf("'%c' -> \\0\n", *ptr); */ | |
66 | /* printf("'next \%c': %c\n", *(ptr+1)); */ | |
1110e851 TB |
67 | /* if(*ptr == '\0'){ */ |
68 | /* /\* end of buf *\/ */ | |
69 | /* /\* printf("found the end. (1)\n"); *\/ */ | |
70 | /* printf("(1) used [%d] of [%d]\n", c, size); */ | |
71 | /* return lines; */ | |
72 | /* } */ | |
7bd7fa83 TB |
73 | |
74 | *ptr = '\0'; | |
1110e851 TB |
75 | ptr++; c++; |
76 | ||
77 | while(*ptr == '\n' || *ptr == '\0'){ | |
78 | if(c >= size){ | |
79 | /* printf("killing read at end of reported read.\n"); */ | |
80 | /* printf("(3) used [%d] of [%d]\n", c, size); */ | |
81 | return lines; | |
82 | } | |
7bd7fa83 TB |
83 | /* empty, discard */ |
84 | /* printf("empty\n"); */ | |
85 | *ptr = '\0'; | |
1110e851 | 86 | ptr++; c++; |
7bd7fa83 TB |
87 | } |
88 | ||
1110e851 TB |
89 | /* if(*ptr == '\0'){ */ |
90 | /* /\* end of buf *\/ */ | |
91 | /* /\* printf("found the end. (2)\n"); *\/ */ | |
92 | /* printf("(2) used [%d] of [%d]\n", c, size); */ | |
93 | /* return lines; */ | |
94 | /* } */ | |
7bd7fa83 TB |
95 | |
96 | /* printf("hallo there.\n"); */ | |
97 | cur_line = malloc(sizeof(struct line)); | |
98 | old_line->next = cur_line; | |
99 | old_line = cur_line; | |
100 | cur_line->buf = ptr; | |
1110e851 | 101 | cur_line->next = NULL; |
7bd7fa83 | 102 | } |
1110e851 TB |
103 | /* printf("________|%c|\n", *ptr); */ |
104 | ptr++; c++; | |
105 | } | |
7bd7fa83 TB |
106 | } |
107 | ||
108 | void socket_read(void (*func)(char *line)) | |
109 | { | |
110 | if(options.lines != NULL){ | |
1110e851 | 111 | /* printf("|||| already got some input. |||\n"); */ |
7bd7fa83 TB |
112 | goto call_func; |
113 | } | |
114 | ||
115 | int size; | |
116 | do_read: | |
1110e851 TB |
117 | /* printf("||||| doing read. ||||\n"); */ |
118 | memset(options.buf, 0, MAX_LEN); \ | |
7bd7fa83 | 119 | size = read(options.sfd, options.buf, MAX_LEN); |
1110e851 TB |
120 | /* printf("read size: %d\n", size); */ |
121 | /* printf("||||| got read. ||||\n"); */ | |
7bd7fa83 | 122 | if(size == 0){ |
1110e851 | 123 | /* printf("||||| reading again. ||||\n"); */ |
7bd7fa83 TB |
124 | goto do_read; |
125 | }else{ | |
1110e851 TB |
126 | /* printf("||||| done read. ||||\n"); */ |
127 | options.lines = find_lines(size); | |
128 | ||
129 | /* struct line *current_line = options.lines; */ | |
130 | ||
131 | /* int count = 0; */ | |
132 | /* while(1){ */ | |
133 | /* printf("[%d] '%s'\n", count++, current_line->buf); */ | |
134 | /* if(current_line->next == NULL){ */ | |
135 | /* printf("found the end.\n"); */ | |
136 | /* break; */ | |
137 | /* } */ | |
138 | /* current_line = current_line->next; */ | |
139 | /* } */ | |
140 | } | |
7bd7fa83 | 141 | |
1110e851 | 142 | call_func:{ |
7bd7fa83 | 143 | struct line *cur_line = options.lines; |
1110e851 TB |
144 | if(cur_line == NULL){ |
145 | /* printf("bad options line.\n"); */ | |
146 | }else{ | |
147 | while(1){ | |
148 | /* printf("[%s]->", cur_line->buf); */ | |
149 | if(cur_line->next == NULL){ | |
150 | /* printf("(nil)\n"); */ | |
151 | break; | |
152 | }else{ | |
153 | cur_line = cur_line->next; | |
154 | } | |
7bd7fa83 | 155 | } |
7bd7fa83 TB |
156 | } |
157 | } | |
158 | ||
1110e851 | 159 | /* printf("calling function with %s\n", options.lines->buf); */ |
7bd7fa83 TB |
160 | func(options.lines->buf); |
161 | options.lines = options.lines->next; | |
162 | return; | |
163 | } |