source: roaraudio/libroar/vio_string.c @ 5317:6b1045321fd6

Last change on this file since 5317:6b1045321fd6 was 5278:b3e0dd3f3141, checked in by phi, 12 years ago

last parts of merging _nonblock into _ctl and fixed sizeof(cmd) of _ctls

File size: 3.6 KB
Line 
1//vio_string.c:
2
3/*
4 *      Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009-2011
5 *
6 *  This file is part of libroar a part of RoarAudio,
7 *  a cross-platform sound system for both, home and professional use.
8 *  See README for details.
9 *
10 *  This file is free software; you can redistribute it and/or modify
11 *  it under the terms of the GNU General Public License version 3
12 *  as published by the Free Software Foundation.
13 *
14 *  libroar is distributed in the hope that it will be useful,
15 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 *  GNU General Public License for more details.
18 *
19 *  You should have received a copy of the GNU General Public License
20 *  along with this software; see the file COPYING.  If not, write to
21 *  the Free Software Foundation, 51 Franklin Street, Fifth Floor,
22 *  Boston, MA 02110-1301, USA.
23 *
24 *  NOTE for everyone want's to change something and send patches:
25 *  read README and HACKING! There a addition information on
26 *  the license of this document you need to read before you send
27 *  any patches.
28 *
29 *  NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc
30 *  or libpulse*:
31 *  The libs libroaresd, libroararts and libroarpulse link this lib
32 *  and are therefore GPL. Because of this it may be illigal to use
33 *  them with any software that uses libesd, libartsc or libpulse*.
34 */
35
36#include "libroar.h"
37
38int     roar_vio_putc    (struct roar_vio_calls * vio, char c) {
39 return roar_vio_write(vio, &c, 1);
40}
41
42int     roar_vio_getc    (struct roar_vio_calls * vio) {
43 unsigned char c;
44
45 if ( roar_vio_read(vio, &c, 1) != 1 )
46  return EOF;
47
48 return c;
49}
50
51int     roar_vio_printf(struct roar_vio_calls * vio, const char *format, ...) {
52 va_list ap;
53 int ret;
54 char buf[8192];
55
56 va_start(ap, format);
57 ret = vsnprintf(buf, 8192, format, ap);
58 va_end(ap);
59
60 return roar_vio_write(vio, buf, ret);
61}
62
63char *  roar_vio_fgets   (struct roar_vio_calls * vio, char * s, size_t size) {
64 size_t  have = 0;
65 size_t  need = size;
66 ssize_t ret;
67 char    cur;
68 char    buf[1024];
69 roar_off_t   offs;
70 char  * eol;
71
72 if ( size == 0 )
73  return s;
74
75 if ( vio == NULL || s == NULL )
76  return NULL;
77
78 // space for the \0
79 size -= 1;
80
81 if ( (offs = roar_vio_lseek(vio, 0, SEEK_CUR)) == (roar_off_t)-1 ) {
82  // need to use the one byte at a time methode
83  while ( have < size ) {
84   if ( roar_vio_read(vio, &cur, 1) != 1 )
85    break;
86
87   s[have] = cur;
88     have++;
89
90   if ( cur == '\n' )
91    break;
92  }
93 } else {
94  // can use the optimized version
95  eol = NULL;
96
97  memset(s, '+', size);
98
99  while ( have < size && eol == NULL ) {
100   ret = roar_vio_read(vio, buf, need > 1023 ? 1023 : need);
101
102   if ( ret == -1 || ret == 0 )
103    break;
104
105   ROAR_DBG("roar_vio_fgets(*): have=%u", (unsigned int) have);
106
107   buf[1023] = 0;
108   if ( (eol = strstr(buf, "\n")) == NULL ) {
109    memcpy(s, buf, ret);
110    s    += ret;
111    have += ret;
112    need -= ret;
113   } else {
114    offs = eol - buf - ret + 1;
115    if ( roar_vio_lseek(vio, offs, SEEK_CUR) == -1 )
116     return NULL;
117
118    ROAR_DBG("roar_vio_fgets(*): have=%u", (unsigned int) have);
119    ROAR_DBG("roar_vio_fgets(*): eol - buf=%lli", (long long) (eol - buf));
120
121    ret = (size_t)(eol - buf);
122    ret++;
123    ROAR_DBG("roar_vio_fgets(*): ret=%lli", (long long) ret);
124
125    memcpy(s, buf, ret);
126    have += ret;
127
128    ROAR_DBG("roar_vio_fgets(*): have=%u", (unsigned int) have);
129
130    break;
131   }
132   ROAR_DBG("roar_vio_fgets(*): have=%u", (unsigned int) have);
133  }
134
135 }
136
137 ROAR_DBG("roar_vio_fgets(*): have=%u", (unsigned int) have);
138
139 if ( !have )
140  return NULL;
141
142 s[have] = 0;
143
144 return s;
145}
146
147//ll
Note: See TracBrowser for help on using the repository browser.