Commit | Line | Data |
---|---|---|
840ae05d | 1 | /* Copyright (C) 1995,1996,1998,1999 Free Software Foundation, Inc. |
0f2d19dd JB |
2 | * |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
16 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
17 | * |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
82892bed | 40 | * If you do not wish that, delete this exception notice. */ |
0f2d19dd JB |
41 | \f |
42 | ||
43 | #include <stdio.h> | |
44 | #include "_scm.h" | |
20e6290e JB |
45 | #include "eval.h" |
46 | #include "chars.h" | |
47 | #include "fports.h" | |
48 | ||
49 | #include "vports.h" | |
0f2d19dd | 50 | |
95b88819 GH |
51 | #ifdef HAVE_STRING_H |
52 | #include <string.h> | |
53 | #endif | |
54 | ||
0f2d19dd JB |
55 | \f |
56 | ||
57 | /* {Ports - soft ports} | |
58 | * | |
59 | */ | |
60 | ||
61 | ||
ee149d03 | 62 | static void |
0f88a8f3 | 63 | sfflush (SCM port) |
0f2d19dd | 64 | { |
840ae05d | 65 | scm_port *pt = SCM_PTAB_ENTRY (port); |
ee149d03 JB |
66 | SCM stream = pt->stream; |
67 | ||
68 | if (pt->write_pos > pt->write_buf) | |
69 | { | |
840ae05d | 70 | /* write the byte. */ |
ee149d03 JB |
71 | scm_apply (SCM_VELTS (stream)[0], SCM_MAKICHR (*pt->write_buf), |
72 | scm_listofnull); | |
73 | pt->write_pos = pt->write_buf; | |
74 | ||
75 | /* flush the output. */ | |
76 | { | |
77 | SCM f = SCM_VELTS (stream)[2]; | |
78 | ||
79 | if (f != SCM_BOOL_F) | |
80 | scm_apply (f, SCM_EOL, SCM_EOL); | |
81 | } | |
82 | } | |
0f2d19dd JB |
83 | } |
84 | ||
ee149d03 | 85 | /* string output proc (element 1) is no longer called. */ |
1cc91f1b | 86 | |
ee149d03 JB |
87 | /* calling the flush proc (element 2) is in case old code needs it, |
88 | but perhaps softports could the use port buffer in the same way as | |
89 | fports. */ | |
90 | ||
91 | /* returns a single character. */ | |
0f2d19dd | 92 | static int |
ee149d03 | 93 | sf_fill_buffer (SCM port) |
0f2d19dd | 94 | { |
0f88a8f3 | 95 | SCM p = SCM_STREAM (port); |
0f2d19dd | 96 | SCM ans; |
ee149d03 JB |
97 | |
98 | ans = scm_apply (SCM_VELTS (p)[3], SCM_EOL, SCM_EOL); /* get char. */ | |
0c32d76c | 99 | if (SCM_FALSEP (ans) || SCM_EOF_OBJECT_P (ans)) |
0f2d19dd | 100 | return EOF; |
ee149d03 | 101 | SCM_ASSERT (SCM_ICHRP (ans), ans, SCM_ARG1, "sf_fill_buffer"); |
5c070ca7 GH |
102 | { |
103 | scm_port *pt = SCM_PTAB_ENTRY (port); | |
104 | ||
105 | *pt->read_buf = SCM_ICHR (ans); | |
106 | pt->read_pos = pt->read_buf; | |
107 | pt->read_end = pt->read_buf + 1; | |
108 | return *pt->read_buf; | |
109 | } | |
0f2d19dd JB |
110 | } |
111 | ||
1cc91f1b | 112 | |
0f2d19dd | 113 | static int |
0f88a8f3 | 114 | sfclose (SCM port) |
0f2d19dd | 115 | { |
0f88a8f3 | 116 | SCM p = SCM_STREAM (port); |
0f2d19dd JB |
117 | SCM f = SCM_VELTS (p)[4]; |
118 | if (SCM_BOOL_F == f) | |
119 | return 0; | |
120 | f = scm_apply (f, SCM_EOL, SCM_EOL); | |
121 | errno = 0; | |
122 | return SCM_BOOL_F == f ? EOF : 0; | |
123 | } | |
124 | ||
125 | ||
126 | ||
127 | SCM_PROC(s_make_soft_port, "make-soft-port", 2, 0, 0, scm_make_soft_port); | |
1cc91f1b | 128 | |
0f2d19dd JB |
129 | SCM |
130 | scm_make_soft_port (pv, modes) | |
131 | SCM pv; | |
132 | SCM modes; | |
0f2d19dd | 133 | { |
840ae05d | 134 | scm_port *pt; |
0f2d19dd JB |
135 | SCM z; |
136 | SCM_ASSERT (SCM_NIMP (pv) && SCM_VECTORP (pv) && 5 == SCM_LENGTH (pv), pv, SCM_ARG1, s_make_soft_port); | |
89958ad0 JB |
137 | SCM_ASSERT (SCM_NIMP (modes) && SCM_ROSTRINGP (modes), modes, SCM_ARG2, s_make_soft_port); |
138 | SCM_COERCE_SUBSTR (modes); | |
0f2d19dd JB |
139 | SCM_NEWCELL (z); |
140 | SCM_DEFER_INTS; | |
141 | pt = scm_add_to_port_table (z); | |
89958ad0 | 142 | SCM_SETCAR (z, scm_tc16_sfport | scm_mode_bits (SCM_ROCHARS (modes))); |
0f2d19dd JB |
143 | SCM_SETPTAB_ENTRY (z, pt); |
144 | SCM_SETSTREAM (z, pv); | |
840ae05d | 145 | pt->read_pos = pt->read_buf = pt->read_end = &pt->shortbuf; |
ee149d03 JB |
146 | pt->write_buf = pt->write_pos = &pt->shortbuf; |
147 | pt->read_buf_size = pt->write_buf_size = 1; | |
148 | pt->write_end = pt->write_buf + pt->write_buf_size; | |
840ae05d | 149 | pt->rw_random = 0; |
0f2d19dd JB |
150 | SCM_ALLOW_INTS; |
151 | return z; | |
152 | } | |
153 | ||
1cc91f1b | 154 | |
10efca5b | 155 | void scm_make_sfptob (void); /* Called from ports.c */ |
0f2d19dd | 156 | |
10efca5b MD |
157 | void |
158 | scm_make_sfptob () | |
0f2d19dd | 159 | { |
10efca5b | 160 | long tc = scm_make_port_type ("soft", sf_fill_buffer, sfflush); |
6c747373 MD |
161 | scm_set_port_mark (tc, scm_markstream); |
162 | scm_set_port_close (tc, sfclose); | |
10efca5b | 163 | } |
1cc91f1b | 164 | |
0f2d19dd JB |
165 | void |
166 | scm_init_vports () | |
0f2d19dd JB |
167 | { |
168 | #include "vports.x" | |
169 | } |