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>
 
#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_2(streams[0].phone, CONSOLE_GETCHAR, 0, 0, &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(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 2479	Rev 2495
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		48
49	#define FDS 32	49	#define FDS 32
50		50
51	typedef struct stream_t {	51	typedef struct stream_t {
52	pwritefn_t w;	52	pwritefn_t w;
53	preadfn_t r;	53	preadfn_t r;
54	void * param;	54	void * param;
55	int phone;	55	int phone;
56	} stream_t;	56	} stream_t;
57		57
58	static int console_phone = -1;	58	static int console_phone = -1;
59	static stream_t streams[FDS];	59	static stream_t streams[FDS];
60		60
61	static ssize_t write_stderr(void param, const void buf, size_t count)	61	static ssize_t write_stderr(void param, const void buf, size_t count)
62	{	62	{
63	return count;	63	return count;
64	}	64	}
65		65
66	static ssize_t read_stdin(void param, void buf, size_t count)	66	static ssize_t read_stdin(void param, void buf, size_t count)
67	{	67	{
68	ipcarg_t r0,r1;	68	ipcarg_t r0, r1;
69	size_t i = 0;	69	size_t i = 0;
70		70
71	while (i < count) {	71	while (i < count) {
72	if (async_req_2(streams[0].phone, CONSOLE_GETCHAR, 0, 0, &r0, &r1) < 0) {	72	if (async_req_2(streams[0].phone, CONSOLE_GETCHAR, 0, 0, &r0,
-		73	&r1) < 0) {
73	return -1;	74	return -1;
74	}	75	}
75	((char *) buf)[i++] = r0;	76	((char *) buf)[i++] = r0;
76	}	77	}
77	return i;	78	return i;
78	}	79	}
79		80
80	static ssize_t write_stdout(void param, const void buf, size_t count)	81	static ssize_t write_stdout(void param, const void buf, size_t count)
81	{	82	{
82	int i;	83	int i;
83		84
84	for (i = 0; i < count; i++)	85	for (i = 0; i < count; i++)
85	async_msg(streams[1].phone, CONSOLE_PUTCHAR, ((const char *) buf)[i]);	86	async_msg(streams[1].phone, CONSOLE_PUTCHAR,
-		87	((const char *) buf)[i]);
86		88
87	return count;	89	return count;
88	}	90	}
89		91
90	static stream_t open_stdin(void)	92	static stream_t open_stdin(void)
91	{	93	{
92	stream_t stream;	94	stream_t stream;
93		95
94	if (console_phone < 0) {	96	if (console_phone < 0) {
95	while ((console_phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0)) < 0) {	97	while ((console_phone = ipc_connect_me_to(PHONE_NS,
-		98	SERVICE_CONSOLE, 0)) < 0) {
96	usleep(10000);	99	usleep(10000);
97	}	100	}
98	}	101	}
99		102
100	stream.r = read_stdin;	103	stream.r = read_stdin;
101	stream.w = NULL;	104	stream.w = NULL;
102	stream.param = 0;	105	stream.param = 0;
103	stream.phone = console_phone;	106	stream.phone = console_phone;
104		107
105	return stream;	108	return stream;
106	}	109	}
107		110
108	static stream_t open_stdout(void)	111	static stream_t open_stdout(void)
109	{	112	{
110	stream_t stream;	113	stream_t stream;
111		114
112	if (console_phone < 0) {	115	if (console_phone < 0) {
113	while ((console_phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0)) < 0) {	116	while ((console_phone = ipc_connect_me_to(PHONE_NS,
-		117	SERVICE_CONSOLE, 0)) < 0) {
114	usleep(10000);	118	usleep(10000);
115	}	119	}
116	}	120	}
117		121
118	stream.r = NULL;	122	stream.r = NULL;
119	stream.w = write_stdout;	123	stream.w = write_stdout;
120	stream.phone = console_phone;	124	stream.phone = console_phone;
121	stream.param = 0;	125	stream.param = 0;
122		126
123	return stream;	127	return stream;
124	}	128	}
125		129
126	static ssize_t write_null(void param, const void buf, size_t count)	130	static ssize_t write_null(void param, const void buf, size_t count)
127	{	131	{
128	return count;	132	return count;
129	}	133	}
130		134
131	fd_t open(const char *fname, int flags)	135	fd_t open(const char *fname, int flags)
132	{	136	{
133	int c = 0;	137	int c = 0;
134		138
135	while (((streams[c].w) \|\| (streams[c].r)) && (c < FDS))	139	while (((streams[c].w) \|\| (streams[c].r)) && (c < FDS))
136	c++;	140	c++;
137		141
138	if (c == FDS)	142	if (c == FDS)
139	return EMFILE;	143	return EMFILE;
140		144
141	if (!strcmp(fname, "stdin")) {	145	if (!strcmp(fname, "stdin")) {
142	streams[c] = open_stdin();	146	streams[c] = open_stdin();
143	return c;	147	return c;
144	}	148	}
145		149
146	if (!strcmp(fname, "stdout")) {	150	if (!strcmp(fname, "stdout")) {
147	streams[c] = open_stdout();	151	streams[c] = open_stdout();
148	return c;	152	return c;
149	}	153	}
150		154
151	if (!strcmp(fname, "stderr")) {	155	if (!strcmp(fname, "stderr")) {
152	streams[c].w = write_stderr;	156	streams[c].w = write_stderr;
153	return c;	157	return c;
154	}	158	}
155		159
156	if (!strcmp(fname, "null")) {	160	if (!strcmp(fname, "null")) {
157	streams[c].w = write_null;	161	streams[c].w = write_null;
158	return c;	162	return c;
159	}	163	}
160		164
161	return -1;	165	return -1;
162	}	166	}
163		167
164		168
165	ssize_t write(int fd, const void *buf, size_t count)	169	ssize_t write(int fd, const void *buf, size_t count)
166	{	170	{
167	if (fd < FDS && streams[fd].w)	171	if (fd < FDS && streams[fd].w)
168	return streams[fd].w(streams[fd].param, buf, count);	172	return streams[fd].w(streams[fd].param, buf, count);
169		173
170	return 0;	174	return 0;
171	}	175	}
172		176
173	ssize_t read(int fd, void *buf, size_t count)	177	ssize_t read(int fd, void *buf, size_t count)
174	{	178	{
175	if (fd < FDS && streams[fd].r)	179	if (fd < FDS && streams[fd].r)
176	return streams[fd].r(streams[fd].param, buf, count);	180	return streams[fd].r(streams[fd].param, buf, count);
177		181
178	return 0;	182	return 0;
179	}	183	}
180		184
181	int get_fd_phone(int fd)	185	int get_fd_phone(int fd)
182	{	186	{
183	if (fd >= FDS \|\| fd < 0)	187	if (fd >= FDS \|\| fd < 0)
184	return -1;	188	return -1;
185	return streams[fd].phone;	189	return streams[fd].phone;
186	}	190	}
187		191
188	/** @}	192	/** @}
189	*/	193	*/
190		194

Subversion Repositories HelenOS

(root)/trunk/uspace/lib/libc/generic/io/stream.c @ 2595 – Rev 2479 → 2495