WebSVN – HelenOS – Diff – /trunk/uspace/lib/libc/generic/io/stream.c


/*
 * Copyright (c) 2006 Josef Cejka
 * Copyright (c) 2006 Jakub Vana
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
/** @addtogroup libc
 * @{
 */
/** @file
 */
 
#include <io/io.h>
#include <io/stream.h>
#include <string.h>
#include <malloc.h>
#include <libc.h>
#include <ipc/ipc.h>
#include <ipc/ns.h>
#include <ipc/fb.h>
#include <ipc/services.h>
#include <console.h>
#include <unistd.h>
#include <async.h>
#include <sys/types.h>
 
#define FDS 32
 
typedef struct stream_t {
    pwritefn_t w;
    preadfn_t r;
    void * param;
    int phone;
} stream_t;
 
static int console_phone = -1;
static stream_t streams[FDS];
 
static ssize_t write_stderr(void *param, const void *buf, size_t count)
{
    return count;
}
 
static ssize_t read_stdin(void *param, void *buf, size_t count)
{
    ipcarg_t r0, r1;
    size_t i = 0;
 
    while (i < count) {
        if (async_req_0_2(streams[0].phone, CONSOLE_GETCHAR,  &r0,
            &r1) < 0) {
            return -1;
        }
        ((char *) buf)[i++] = r0;
    }
    return i;
}
 
static ssize_t write_stdout(void *param, const void *buf, size_t count)
{
    int i;
 
    for (i = 0; i < count; i++)
        async_msg_1(streams[1].phone, CONSOLE_PUTCHAR,
            ((const char *) buf)[i]);
   
    return count;
}
 
static stream_t open_stdin(void)
{
    stream_t stream;
   
    if (console_phone < 0) {
        while ((console_phone = ipc_connect_me_to(PHONE_NS,
            SERVICE_CONSOLE, 0)) < 0) {
            usleep(10000);
        }
    }
   
    stream.r = read_stdin;
    stream.w = NULL;
    stream.param = 0;
    stream.phone = console_phone;
   
    return stream;
}
 
static stream_t open_stdout(void)
{
    stream_t stream;
 
    if (console_phone < 0) {
        while ((console_phone = ipc_connect_me_to(PHONE_NS,
            SERVICE_CONSOLE, 0)) < 0) {
            usleep(10000);
        }
    }
   
    stream.r = NULL;
    stream.w = write_stdout;
    stream.phone = console_phone;
    stream.param = 0;
   
    return stream;
}
 
static ssize_t write_null(void *param, const void *buf, size_t count)
{
    return count;
}
 
fd_t open(const char *fname, int flags)
{
    int c = 0;
 
    while (((streams[c].w) || (streams[c].r)) && (c < FDS))
        c++;
   
    if (c == FDS)
        return EMFILE;
   
    if (!strcmp(fname, "stdin")) {
        streams[c] = open_stdin();
        return c;
    }
   
    if (!strcmp(fname, "stdout")) {
        streams[c] = open_stdout();
        return c;
    }
   
    if (!strcmp(fname, "stderr")) {
        streams[c].w = write_stderr;
        return c;
    }
   
    if (!strcmp(fname, "null")) {
        streams[c].w = write_null;
        return c;
    }
   
    return -1;
}
 
 
ssize_t write(int fd, const void *buf, size_t count)
{
    if (fd < FDS && streams[fd].w)
        return streams[fd].w(streams[fd].param, buf, count);
   
    return 0;
}
 
ssize_t read(int fd, void *buf, size_t count)
{
    if (fd < FDS && streams[fd].r)
        return streams[fd].r(streams[fd].param, buf, count);
   
    return 0;
}
 
int get_fd_phone(int fd)
{
    if (fd >= FDS || fd < 0)
        return -1;
    return streams[fd].phone;
}
 
/** @}
 */
 

Rev 2541	Rev 2621
1	/*	1	/*
2	* Copyright (c) 2006 Josef Cejka	2	* Copyright (c) 2006 Josef Cejka
3	* Copyright (c) 2006 Jakub Vana	3	* Copyright (c) 2006 Jakub Vana
4	* All rights reserved.	4	* All rights reserved.
5	*	5	*
6	* Redistribution and use in source and binary forms, with or without	6	* Redistribution and use in source and binary forms, with or without
7	* modification, are permitted provided that the following conditions	7	* modification, are permitted provided that the following conditions
8	* are met:	8	* are met:
9	*	9	*
10	* - Redistributions of source code must retain the above copyright	10	* - Redistributions of source code must retain the above copyright
11	* notice, this list of conditions and the following disclaimer.	11	* notice, this list of conditions and the following disclaimer.
12	* - Redistributions in binary form must reproduce the above copyright	12	* - Redistributions in binary form must reproduce the above copyright
13	* notice, this list of conditions and the following disclaimer in the	13	* notice, this list of conditions and the following disclaimer in the
14	* documentation and/or other materials provided with the distribution.	14	* documentation and/or other materials provided with the distribution.
15	* - The name of the author may not be used to endorse or promote products	15	* - The name of the author may not be used to endorse or promote products
16	* derived from this software without specific prior written permission.	16	* derived from this software without specific prior written permission.
17	*	17	*
18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	19	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	20	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	21	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	22	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	23	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	27	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	28	*/
29		29
30	/** @addtogroup libc	30	/** @addtogroup libc
31	* @{	31	* @{
32	*/	32	*/
33	/** @file	33	/** @file
34	*/	34	*/
35		35
36	#include <io/io.h>	36	#include <io/io.h>
37	#include <io/stream.h>	37	#include <io/stream.h>
38	#include <string.h>	38	#include <string.h>
39	#include <malloc.h>	39	#include <malloc.h>
40	#include <libc.h>	40	#include <libc.h>
41	#include <ipc/ipc.h>	41	#include <ipc/ipc.h>
42	#include <ipc/ns.h>	42	#include <ipc/ns.h>
43	#include <ipc/fb.h>	43	#include <ipc/fb.h>
44	#include <ipc/services.h>	44	#include <ipc/services.h>
45	#include <console.h>	45	#include <console.h>
46	#include <unistd.h>	46	#include <unistd.h>
47	#include <async.h>	47	#include <async.h>
48	#include <sys/types.h>	48	#include <sys/types.h>
49		49
50	#define FDS 32	50	#define FDS 32
51		51
52	typedef struct stream_t {	52	typedef struct stream_t {
53	pwritefn_t w;	53	pwritefn_t w;
54	preadfn_t r;	54	preadfn_t r;
55	void * param;	55	void * param;
56	int phone;	56	int phone;
57	} stream_t;	57	} stream_t;
58		58
59	static int console_phone = -1;	59	static int console_phone = -1;
60	static stream_t streams[FDS];	60	static stream_t streams[FDS];
61		61
62	static ssize_t write_stderr(void param, const void buf, size_t count)	62	static ssize_t write_stderr(void param, const void buf, size_t count)
63	{	63	{
64	return count;	64	return count;
65	}	65	}
66		66
67	static ssize_t read_stdin(void param, void buf, size_t count)	67	static ssize_t read_stdin(void param, void buf, size_t count)
68	{	68	{
69	ipcarg_t r0, r1;	69	ipcarg_t r0, r1;
70	size_t i = 0;	70	size_t i = 0;
71		71
72	while (i < count) {	72	while (i < count) {
73	if (async_req_2(streams[0].phone, CONSOLE_GETCHAR, 0, 0, &r0,	73	if (async_req_0_2(streams[0].phone, CONSOLE_GETCHAR, &r0,
74	&r1) < 0) {	74	&r1) < 0) {
75	return -1;	75	return -1;
76	}	76	}
77	((char *) buf)[i++] = r0;	77	((char *) buf)[i++] = r0;
78	}	78	}
79	return i;	79	return i;
80	}	80	}
81		81
82	static ssize_t write_stdout(void param, const void buf, size_t count)	82	static ssize_t write_stdout(void param, const void buf, size_t count)
83	{	83	{
84	int i;	84	int i;
85		85
86	for (i = 0; i < count; i++)	86	for (i = 0; i < count; i++)
87	async_msg(streams[1].phone, CONSOLE_PUTCHAR,	87	async_msg_1(streams[1].phone, CONSOLE_PUTCHAR,
88	((const char *) buf)[i]);	88	((const char *) buf)[i]);
89		89
90	return count;	90	return count;
91	}	91	}
92		92
93	static stream_t open_stdin(void)	93	static stream_t open_stdin(void)
94	{	94	{
95	stream_t stream;	95	stream_t stream;
96		96
97	if (console_phone < 0) {	97	if (console_phone < 0) {
98	while ((console_phone = ipc_connect_me_to(PHONE_NS,	98	while ((console_phone = ipc_connect_me_to(PHONE_NS,
99	SERVICE_CONSOLE, 0)) < 0) {	99	SERVICE_CONSOLE, 0)) < 0) {
100	usleep(10000);	100	usleep(10000);
101	}	101	}
102	}	102	}
103		103
104	stream.r = read_stdin;	104	stream.r = read_stdin;
105	stream.w = NULL;	105	stream.w = NULL;
106	stream.param = 0;	106	stream.param = 0;
107	stream.phone = console_phone;	107	stream.phone = console_phone;
108		108
109	return stream;	109	return stream;
110	}	110	}
111		111
112	static stream_t open_stdout(void)	112	static stream_t open_stdout(void)
113	{	113	{
114	stream_t stream;	114	stream_t stream;
115		115
116	if (console_phone < 0) {	116	if (console_phone < 0) {
117	while ((console_phone = ipc_connect_me_to(PHONE_NS,	117	while ((console_phone = ipc_connect_me_to(PHONE_NS,
118	SERVICE_CONSOLE, 0)) < 0) {	118	SERVICE_CONSOLE, 0)) < 0) {
119	usleep(10000);	119	usleep(10000);
120	}	120	}
121	}	121	}
122		122
123	stream.r = NULL;	123	stream.r = NULL;
124	stream.w = write_stdout;	124	stream.w = write_stdout;
125	stream.phone = console_phone;	125	stream.phone = console_phone;
126	stream.param = 0;	126	stream.param = 0;
127		127
128	return stream;	128	return stream;
129	}	129	}
130		130
131	static ssize_t write_null(void param, const void buf, size_t count)	131	static ssize_t write_null(void param, const void buf, size_t count)
132	{	132	{
133	return count;	133	return count;
134	}	134	}
135		135
136	fd_t open(const char *fname, int flags)	136	fd_t open(const char *fname, int flags)
137	{	137	{
138	int c = 0;	138	int c = 0;
139		139
140	while (((streams[c].w) \|\| (streams[c].r)) && (c < FDS))	140	while (((streams[c].w) \|\| (streams[c].r)) && (c < FDS))
141	c++;	141	c++;
142		142
143	if (c == FDS)	143	if (c == FDS)
144	return EMFILE;	144	return EMFILE;
145		145
146	if (!strcmp(fname, "stdin")) {	146	if (!strcmp(fname, "stdin")) {
147	streams[c] = open_stdin();	147	streams[c] = open_stdin();
148	return c;	148	return c;
149	}	149	}
150		150
151	if (!strcmp(fname, "stdout")) {	151	if (!strcmp(fname, "stdout")) {
152	streams[c] = open_stdout();	152	streams[c] = open_stdout();
153	return c;	153	return c;
154	}	154	}
155		155
156	if (!strcmp(fname, "stderr")) {	156	if (!strcmp(fname, "stderr")) {
157	streams[c].w = write_stderr;	157	streams[c].w = write_stderr;
158	return c;	158	return c;
159	}	159	}
160		160
161	if (!strcmp(fname, "null")) {	161	if (!strcmp(fname, "null")) {
162	streams[c].w = write_null;	162	streams[c].w = write_null;
163	return c;	163	return c;
164	}	164	}
165		165
166	return -1;	166	return -1;
167	}	167	}
168		168
169		169
170	ssize_t write(int fd, const void *buf, size_t count)	170	ssize_t write(int fd, const void *buf, size_t count)
171	{	171	{
172	if (fd < FDS && streams[fd].w)	172	if (fd < FDS && streams[fd].w)
173	return streams[fd].w(streams[fd].param, buf, count);	173	return streams[fd].w(streams[fd].param, buf, count);
174		174
175	return 0;	175	return 0;
176	}	176	}
177		177
178	ssize_t read(int fd, void *buf, size_t count)	178	ssize_t read(int fd, void *buf, size_t count)
179	{	179	{
180	if (fd < FDS && streams[fd].r)	180	if (fd < FDS && streams[fd].r)
181	return streams[fd].r(streams[fd].param, buf, count);	181	return streams[fd].r(streams[fd].param, buf, count);
182		182
183	return 0;	183	return 0;
184	}	184	}
185		185
186	int get_fd_phone(int fd)	186	int get_fd_phone(int fd)
187	{	187	{
188	if (fd >= FDS \|\| fd < 0)	188	if (fd >= FDS \|\| fd < 0)
189	return -1;	189	return -1;
190	return streams[fd].phone;	190	return streams[fd].phone;
191	}	191	}
192		192
193	/** @}	193	/** @}
194	*/	194	*/
195		195

Subversion Repositories HelenOS

(root)/trunk/uspace/lib/libc/generic/io/stream.c – Rev 2541 → 2621