A modern Music Player Daemon based on Rockbox open source high quality audio player
tsiry-sandratraina.com
libadwaita
audio
rust
zig
deno
mpris
rockbox
mpd
1/* buffer.c - Text buffering and word wrapping
2 * Copyright (c) 1995-1997 Stefan Jokisch
3 *
4 * This file is part of Frotz.
5 *
6 * Frotz is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * Frotz is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
19 */
20
21#include "frotz.h"
22
23extern void stream_char (zchar);
24extern void stream_word (const zchar *);
25extern void stream_new_line (void);
26
27static zchar buffer[TEXT_BUFFER_SIZE];
28static int bufpos = 0;
29
30static zchar prev_c = 0;
31
32/*
33 * flush_buffer
34 *
35 * Copy the contents of the text buffer to the output streams.
36 *
37 */
38
39void flush_buffer (void)
40{
41 static bool locked = FALSE;
42
43 /* Make sure we stop when flush_buffer is called from flush_buffer.
44 Note that this is difficult to avoid as we might print a newline
45 during flush_buffer, which might cause a newline interrupt, that
46 might execute any arbitrary opcode, which might flush the buffer. */
47
48 if (locked || bufpos == 0)
49 return;
50
51 /* Send the buffer to the output streams */
52
53 buffer[bufpos] = 0;
54
55
56 locked = TRUE;
57
58 stream_word (buffer);
59
60#ifdef SPEECH_OUTPUT
61 os_speech_output(buffer);
62#endif
63
64 locked = FALSE;
65
66 /* Reset the buffer */
67
68 bufpos = 0;
69 prev_c = 0;
70
71}/* flush_buffer */
72
73/*
74 * print_char
75 *
76 * High level output function.
77 *
78 */
79
80void print_char (zchar c)
81{
82 static bool flag = FALSE;
83
84 if (message || ostream_memory || enable_buffering) {
85
86 if (!flag) {
87
88 /* Characters 0 and ZC_RETURN are special cases */
89
90 if (c == ZC_RETURN)
91 { new_line (); return; }
92 if (c == 0)
93 return;
94
95 /* Flush the buffer before a whitespace or after a hyphen */
96
97 if (c == ' ' || c == ZC_INDENT || c == ZC_GAP || (prev_c == '-' && c != '-'))
98
99
100 flush_buffer ();
101
102 /* Set the flag if this is part one of a style or font change */
103
104 if (c == ZC_NEW_FONT || c == ZC_NEW_STYLE)
105 flag = TRUE;
106
107 /* Remember the current character code */
108
109 prev_c = c;
110
111 } else flag = FALSE;
112
113 /* Insert the character into the buffer */
114
115 buffer[bufpos++] = c;
116
117 if (bufpos == TEXT_BUFFER_SIZE)
118 runtime_error (ERR_TEXT_BUF_OVF);
119
120 } else stream_char (c);
121
122}/* print_char */
123
124/*
125 * new_line
126 *
127 * High level newline function.
128 *
129 */
130
131void new_line (void)
132{
133
134 flush_buffer (); stream_new_line ();
135
136}/* new_line */
137
138
139/*
140 * init_buffer
141 *
142 * Initialize buffer variables.
143 *
144 */
145
146void init_buffer(void)
147{
148 memset(buffer, 0, sizeof (zchar) * TEXT_BUFFER_SIZE);
149 bufpos = 0;
150 prev_c = 0;
151}
152