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>
 
#define FDS 32
 
typedef struct stream_t {
    pwritefn_t w;
    preadfn_t r;
    void * param;
} stream_t;
 
int console_phone = -1;
 
stream_t streams[FDS] = {{0, 0, 0}};
 
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 (ipc_call_sync_2(console_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(console_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;
    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.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].w = write_stdout;
        //return c;
        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;
}
 
 

Rev 1508	Rev 1518
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		42
43	#define FDS 32	43	#define FDS 32
44		44
45	typedef struct stream_t {	45	typedef struct stream_t {
46	pwritefn_t w;	46	pwritefn_t w;
47	preadfn_t r;	47	preadfn_t r;
48	void * param;	48	void * param;
49	} stream_t;	49	} stream_t;
50		50
51	int console_phone = -1;	51	int console_phone = -1;
52		52
53	stream_t streams[FDS] = {{0, 0, 0}};	53	stream_t streams[FDS] = {{0, 0, 0}};
54		54
55	static ssize_t write_stderr(void param, const void buf, size_t count)	55	static ssize_t write_stderr(void param, const void buf, size_t count)
56	{	56	{
57	return count;	57	return count;
58	}	58	}
59		59
60	static ssize_t read_stdin(void param, void buf, size_t count)	60	static ssize_t read_stdin(void param, void buf, size_t count)
61	{	61	{
62	ipcarg_t r0,r1;	62	ipcarg_t r0,r1;
63	size_t i = 0;	63	size_t i = 0;
64		64
65	while (i < count) {	65	while (i < count) {
66	if (ipc_call_sync_2(console_phone, CONSOLE_GETCHAR, 0, 0, &r0, &r1) < 0) {	66	if (ipc_call_sync_2(console_phone, CONSOLE_GETCHAR, 0, 0, &r0, &r1) < 0) {
67	return -1;	67	return -1;
68	}	68	}
69	((char *)buf)[i++] = r0;	69	((char *)buf)[i++] = r0;
70	}	70	}
71	return i;	71	return i;
72	}	72	}
73		73
74	static ssize_t write_stdout(void param, const void buf, size_t count)	74	static ssize_t write_stdout(void param, const void buf, size_t count)
75	{	75	{
76	int i;	76	int i;
77	ipcarg_t r0,r1;	77	ipcarg_t r0,r1;
78		78
79	for (i = 0; i < count; i++)	79	for (i = 0; i < count; i++)
80	ipc_call_async_2(console_phone, CONSOLE_PUTCHAR, ((const char *)buf)[i], 0, NULL, NULL);	80	send_call(console_phone, CONSOLE_PUTCHAR, ((const char *)buf)[i]);
81		81
82	return count;	82	return count;
83	}	83	}
84		84
85		85
86		86
87	static stream_t open_stdin(void)	87	static stream_t open_stdin(void)
88	{	88	{
89	stream_t stream;	89	stream_t stream;
90	int phoneid;	90	int phoneid;
91	int res;	91	int res;
92		92
93	if (console_phone < 0) {	93	if (console_phone < 0) {
94	while ((console_phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0)) < 0) {	94	while ((console_phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0)) < 0) {
95	usleep(10000);	95	usleep(10000);
96	}	96	}
97	}	97	}
98		98
99	stream.r = read_stdin;	99	stream.r = read_stdin;
100	stream.param = 0;	100	stream.param = 0;
101	return stream;	101	return stream;
102	}	102	}
103		103
104	static stream_t open_stdout(void)	104	static stream_t open_stdout(void)
105	{	105	{
106	stream_t stream;	106	stream_t stream;
107	int res;	107	int res;
108		108
109	if (console_phone < 0) {	109	if (console_phone < 0) {
110	while ((console_phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0)) < 0) {	110	while ((console_phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0)) < 0) {
111	usleep(10000);	111	usleep(10000);
112	}	112	}
113	}	113	}
114		114
115	stream.w = write_stdout;	115	stream.w = write_stdout;
116	stream.param = 0;	116	stream.param = 0;
117	return stream;	117	return stream;
118	}	118	}
119		119
120	static ssize_t write_null(void param, const void buf, size_t count)	120	static ssize_t write_null(void param, const void buf, size_t count)
121	{	121	{
122	return count;	122	return count;
123	}	123	}
124		124
125		125
126	fd_t open(const char *fname, int flags)	126	fd_t open(const char *fname, int flags)
127	{	127	{
128	int c = 0;	128	int c = 0;
129		129
130	while (((streams[c].w) \|\| (streams[c].r)) && (c < FDS))	130	while (((streams[c].w) \|\| (streams[c].r)) && (c < FDS))
131	c++;	131	c++;
132	if (c == FDS)	132	if (c == FDS)
133	return EMFILE;	133	return EMFILE;
134		134
135	if (!strcmp(fname, "stdin")) {	135	if (!strcmp(fname, "stdin")) {
136	streams[c] = open_stdin();	136	streams[c] = open_stdin();
137	return c;	137	return c;
138	}	138	}
139		139
140	if (!strcmp(fname, "stdout")) {	140	if (!strcmp(fname, "stdout")) {
141	//streams[c].w = write_stdout;	141	//streams[c].w = write_stdout;
142	//return c;	142	//return c;
143	streams[c] = open_stdout();	143	streams[c] = open_stdout();
144	return c;	144	return c;
145	}	145	}
146		146
147	if (!strcmp(fname, "stderr")) {	147	if (!strcmp(fname, "stderr")) {
148	streams[c].w = write_stderr;	148	streams[c].w = write_stderr;
149	return c;	149	return c;
150	}	150	}
151	if (!strcmp(fname, "null")) {	151	if (!strcmp(fname, "null")) {
152	streams[c].w = write_null;	152	streams[c].w = write_null;
153	return c;	153	return c;
154	}	154	}
155	}	155	}
156		156
157		157
158	ssize_t write(int fd, const void *buf, size_t count)	158	ssize_t write(int fd, const void *buf, size_t count)
159	{	159	{
160	if (fd < FDS)	160	if (fd < FDS)
161	return streams[fd].w(streams[fd].param, buf, count);	161	return streams[fd].w(streams[fd].param, buf, count);
162		162
163	return 0;	163	return 0;
164	}	164	}
165		165
166	ssize_t read(int fd, void *buf, size_t count)	166	ssize_t read(int fd, void *buf, size_t count)
167	{	167	{
168	if (fd < FDS)	168	if (fd < FDS)
169	return streams[fd].r(streams[fd].param, buf, count);	169	return streams[fd].r(streams[fd].param, buf, count);
170		170
171	return 0;	171	return 0;
172	}	172	}
173		173
174		174

Subversion Repositories HelenOS-historic

(root)/uspace/trunk/libc/generic/io/stream.c – Rev 1508 → 1518