WebSVN – HelenOS-historic – Diff – /uspace/trunk/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.
 */
 
 
#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 (sync_send_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;
    ipcarg_t r0,r1;
 
    for (i = 0; i < count; i++)
        send_call(streams[1].phone, CONSOLE_PUTCHAR, ((const char *)buf)[i]);
   
    return count;
}
 
 
 
static stream_t open_stdin(void)
{
    stream_t stream;
    int phoneid;
    int res;
   
    if (console_phone < 0) {
        while ((console_phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0)) < 0) {
            usleep(10000);
        }
    }
   
    stream.r = read_stdin;
    stream.param = 0;
    stream.phone = console_phone;
   
    return stream;
}
 
static stream_t open_stdout(void)
{
    stream_t stream;
    int res;
 
    if (console_phone < 0) {
        while ((console_phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0)) < 0) {
            usleep(10000);
        }
    }
   
    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;
    }
}
 
 
ssize_t write(int fd, const void *buf, size_t count)
{
    if (fd < FDS)
        return streams[fd].w(streams[fd].param, buf, count);
   
    return 0;
}
 
ssize_t read(int fd, void *buf, size_t count)
{
    if (fd < FDS)
        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 1519	Rev 1536
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		30
31	#include <io/io.h>	31	#include <io/io.h>
32	#include <io/stream.h>	32	#include <io/stream.h>
33	#include <string.h>	33	#include <string.h>
34	#include <malloc.h>	34	#include <malloc.h>
35	#include <libc.h>	35	#include <libc.h>
36	#include <ipc/ipc.h>	36	#include <ipc/ipc.h>
37	#include <ipc/ns.h>	37	#include <ipc/ns.h>
38	#include <ipc/fb.h>	38	#include <ipc/fb.h>
39	#include <ipc/services.h>	39	#include <ipc/services.h>
40	#include <console.h>	40	#include <console.h>
41	#include <unistd.h>	41	#include <unistd.h>
42	#include <async.h>	42	#include <async.h>
43		43
44	#define FDS 32	44	#define FDS 32
45		45
46	typedef struct stream_t {	46	typedef struct stream_t {
47	pwritefn_t w;	47	pwritefn_t w;
48	preadfn_t r;	48	preadfn_t r;
49	void * param;	49	void * param;
50	int phone;	50	int phone;
51	} stream_t;	51	} stream_t;
52		52
53	static int console_phone = -1;	53	static int console_phone = -1;
54	static stream_t streams[FDS] = {{0, 0, 0, -1}};	54	static stream_t streams[FDS];
55		55
56	static ssize_t write_stderr(void param, const void buf, size_t count)	56	static ssize_t write_stderr(void param, const void buf, size_t count)
57	{	57	{
58	return count;	58	return count;
59	}	59	}
60		60
61	static ssize_t read_stdin(void param, void buf, size_t count)	61	static ssize_t read_stdin(void param, void buf, size_t count)
62	{	62	{
63	ipcarg_t r0,r1;	63	ipcarg_t r0,r1;
64	size_t i = 0;	64	size_t i = 0;
65		65
66	while (i < count) {	66	while (i < count) {
67	if (sync_send_2(streams[0].phone, CONSOLE_GETCHAR, 0, 0, &r0, &r1) < 0) {	67	if (sync_send_2(streams[0].phone, CONSOLE_GETCHAR, 0, 0, &r0, &r1) < 0) {
68	return -1;	68	return -1;
69	}	69	}
70	((char *)buf)[i++] = r0;	70	((char *)buf)[i++] = r0;
71	}	71	}
72	return i;	72	return i;
73	}	73	}
74		74
75	static ssize_t write_stdout(void param, const void buf, size_t count)	75	static ssize_t write_stdout(void param, const void buf, size_t count)
76	{	76	{
77	int i;	77	int i;
78	ipcarg_t r0,r1;	78	ipcarg_t r0,r1;
79		79
80	for (i = 0; i < count; i++)	80	for (i = 0; i < count; i++)
81	send_call(streams[1].phone, CONSOLE_PUTCHAR, ((const char *)buf)[i]);	81	send_call(streams[1].phone, CONSOLE_PUTCHAR, ((const char *)buf)[i]);
82		82
83	return count;	83	return count;
84	}	84	}
85		85
86		86
87		87
88	static stream_t open_stdin(void)	88	static stream_t open_stdin(void)
89	{	89	{
90	stream_t stream;	90	stream_t stream;
91	int phoneid;	91	int phoneid;
92	int res;	92	int res;
93		93
94	if (console_phone < 0) {	94	if (console_phone < 0) {
95	while ((console_phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0)) < 0) {	95	while ((console_phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0)) < 0) {
96	usleep(10000);	96	usleep(10000);
97	}	97	}
98	}	98	}
99		99
100	stream.r = read_stdin;	100	stream.r = read_stdin;
101	stream.param = 0;	101	stream.param = 0;
102	stream.phone = console_phone;	102	stream.phone = console_phone;
103		103
104	return stream;	104	return stream;
105	}	105	}
106		106
107	static stream_t open_stdout(void)	107	static stream_t open_stdout(void)
108	{	108	{
109	stream_t stream;	109	stream_t stream;
110	int res;	110	int res;
111		111
112	if (console_phone < 0) {	112	if (console_phone < 0) {
113	while ((console_phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0)) < 0) {	113	while ((console_phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0)) < 0) {
114	usleep(10000);	114	usleep(10000);
115	}	115	}
116	}	116	}
117		117
118	stream.w = write_stdout;	118	stream.w = write_stdout;
-		119	stream.phone = console_phone;
119	stream.param = 0;	120	stream.param = 0;
120	return stream;	121	return stream;
121	}	122	}
122		123
123	static ssize_t write_null(void param, const void buf, size_t count)	124	static ssize_t write_null(void param, const void buf, size_t count)
124	{	125	{
125	return count;	126	return count;
126	}	127	}
127		128
128		129
129	fd_t open(const char *fname, int flags)	130	fd_t open(const char *fname, int flags)
130	{	131	{
131	int c = 0;	132	int c = 0;
132		133
133	while (((streams[c].w) \|\| (streams[c].r)) && (c < FDS))	134	while (((streams[c].w) \|\| (streams[c].r)) && (c < FDS))
134	c++;	135	c++;
135	if (c == FDS)	136	if (c == FDS)
136	return EMFILE;	137	return EMFILE;
137		138
138	if (!strcmp(fname, "stdin")) {	139	if (!strcmp(fname, "stdin")) {
139	streams[c] = open_stdin();	140	streams[c] = open_stdin();
140	return c;	141	return c;
141	}	142	}
142		143
143	if (!strcmp(fname, "stdout")) {	144	if (!strcmp(fname, "stdout")) {
144	streams[c] = open_stdout();	145	streams[c] = open_stdout();
145	return c;	146	return c;
146	}	147	}
147		148
148	if (!strcmp(fname, "stderr")) {	149	if (!strcmp(fname, "stderr")) {
149	streams[c].w = write_stderr;	150	streams[c].w = write_stderr;
150	return c;	151	return c;
151	}	152	}
152	if (!strcmp(fname, "null")) {	153	if (!strcmp(fname, "null")) {
153	streams[c].w = write_null;	154	streams[c].w = write_null;
154	return c;	155	return c;
155	}	156	}
156	}	157	}
157		158
158		159
159	ssize_t write(int fd, const void *buf, size_t count)	160	ssize_t write(int fd, const void *buf, size_t count)
160	{	161	{
161	if (fd < FDS)	162	if (fd < FDS)
162	return streams[fd].w(streams[fd].param, buf, count);	163	return streams[fd].w(streams[fd].param, buf, count);
163		164
164	return 0;	165	return 0;
165	}	166	}
166		167
167	ssize_t read(int fd, void *buf, size_t count)	168	ssize_t read(int fd, void *buf, size_t count)
168	{	169	{
169	if (fd < FDS)	170	if (fd < FDS)
170	return streams[fd].r(streams[fd].param, buf, count);	171	return streams[fd].r(streams[fd].param, buf, count);
171		172
172	return 0;	173	return 0;
173	}	174	}
174		175
175	int get_fd_phone(int fd)	176	int get_fd_phone(int fd)
176	{	177	{
177	if (fd >= FDS \|\| fd < 0)	178	if (fd >= FDS \|\| fd < 0)
178	return -1;	179	return -1;
179	return streams[fd].phone;	180	return streams[fd].phone;
180	}	181	}
181		182

Subversion Repositories HelenOS-historic

(root)/uspace/trunk/libc/generic/io/stream.c – Rev 1519 → 1536