signal.c (009e81b16465ea457c0e63fd49fe77f47cc27a5a) signal.c (1ea316270f1f75922ac53976d5d8808a41442f46)
1/*
2 * Copyright (C) 1984-2015 Mark Nudelman
3 *
4 * You may distribute under the terms of either the GNU General Public
5 * License or the Less License, as specified in the README file.
6 *
7 * For more information, see the README file.
8 */

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37extern int less_is_more;
38extern long jump_sline_fraction;
39
40/*
41 * Interrupt signal handler.
42 */
43 /* ARGSUSED*/
44 static RETSIGTYPE
1/*
2 * Copyright (C) 1984-2015 Mark Nudelman
3 *
4 * You may distribute under the terms of either the GNU General Public
5 * License or the Less License, as specified in the README file.
6 *
7 * For more information, see the README file.
8 */

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37extern int less_is_more;
38extern long jump_sline_fraction;
39
40/*
41 * Interrupt signal handler.
42 */
43 /* ARGSUSED*/
44 static RETSIGTYPE
45u_interrupt(type)
46 int type;
45u_interrupt(int type)
47{
48 bell();
49#if OS2
50 LSIGNAL(SIGINT, SIG_ACK);
51#endif
52 LSIGNAL(SIGINT, u_interrupt);
53 sigs |= S_INTERRUPT;
54#if MSDOS_COMPILER==DJGPPC

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67}
68
69#ifdef SIGTSTP
70/*
71 * "Stop" (^Z) signal handler.
72 */
73 /* ARGSUSED*/
74 static RETSIGTYPE
46{
47 bell();
48#if OS2
49 LSIGNAL(SIGINT, SIG_ACK);
50#endif
51 LSIGNAL(SIGINT, u_interrupt);
52 sigs |= S_INTERRUPT;
53#if MSDOS_COMPILER==DJGPPC

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66}
67
68#ifdef SIGTSTP
69/*
70 * "Stop" (^Z) signal handler.
71 */
72 /* ARGSUSED*/
73 static RETSIGTYPE
75stop(type)
76 int type;
74stop(int type)
77{
78 LSIGNAL(SIGTSTP, stop);
79 sigs |= S_STOP;
80 if (reading)
81 intread();
82}
83#endif
84
85#ifdef SIGWINCH
86/*
87 * "Window" change handler
88 */
89 /* ARGSUSED*/
90 public RETSIGTYPE
75{
76 LSIGNAL(SIGTSTP, stop);
77 sigs |= S_STOP;
78 if (reading)
79 intread();
80}
81#endif
82
83#ifdef SIGWINCH
84/*
85 * "Window" change handler
86 */
87 /* ARGSUSED*/
88 public RETSIGTYPE
91winch(type)
92 int type;
89winch(int type)
93{
94 LSIGNAL(SIGWINCH, winch);
95 sigs |= S_WINCH;
96 if (reading)
97 intread();
98}
99#else
100#ifdef SIGWIND
101/*
102 * "Window" change handler
103 */
104 /* ARGSUSED*/
105 public RETSIGTYPE
90{
91 LSIGNAL(SIGWINCH, winch);
92 sigs |= S_WINCH;
93 if (reading)
94 intread();
95}
96#else
97#ifdef SIGWIND
98/*
99 * "Window" change handler
100 */
101 /* ARGSUSED*/
102 public RETSIGTYPE
106winch(type)
107 int type;
103winch(int type)
108{
109 LSIGNAL(SIGWIND, winch);
110 sigs |= S_WINCH;
111 if (reading)
112 intread();
113}
114#endif
115#endif
116
117#if MSDOS_COMPILER==WIN32C
118/*
119 * Handle CTRL-C and CTRL-BREAK keys.
120 */
121#include "windows.h"
122
123 static BOOL WINAPI
104{
105 LSIGNAL(SIGWIND, winch);
106 sigs |= S_WINCH;
107 if (reading)
108 intread();
109}
110#endif
111#endif
112
113#if MSDOS_COMPILER==WIN32C
114/*
115 * Handle CTRL-C and CTRL-BREAK keys.
116 */
117#include "windows.h"
118
119 static BOOL WINAPI
124wbreak_handler(dwCtrlType)
125 DWORD dwCtrlType;
120wbreak_handler(DWORD dwCtrlType)
126{
127 switch (dwCtrlType)
128 {
129 case CTRL_C_EVENT:
130 case CTRL_BREAK_EVENT:
131 sigs |= S_INTERRUPT;
132 return (TRUE);
133 default:
134 break;
135 }
136 return (FALSE);
137}
138#endif
139
140/*
141 * Set up the signal handlers.
142 */
143 public void
121{
122 switch (dwCtrlType)
123 {
124 case CTRL_C_EVENT:
125 case CTRL_BREAK_EVENT:
126 sigs |= S_INTERRUPT;
127 return (TRUE);
128 default:
129 break;
130 }
131 return (FALSE);
132}
133#endif
134
135/*
136 * Set up the signal handlers.
137 */
138 public void
144init_signals(on)
145 int on;
139init_signals(int on)
146{
147 if (on)
148 {
149 /*
150 * Set signal handlers.
151 */
152 (void) LSIGNAL(SIGINT, u_interrupt);
153#if MSDOS_COMPILER==WIN32C

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189 }
190}
191
192/*
193 * Process any signals we have received.
194 * A received signal cause a bit to be set in "sigs".
195 */
196 public void
140{
141 if (on)
142 {
143 /*
144 * Set signal handlers.
145 */
146 (void) LSIGNAL(SIGINT, u_interrupt);
147#if MSDOS_COMPILER==WIN32C

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183 }
184}
185
186/*
187 * Process any signals we have received.
188 * A received signal cause a bit to be set in "sigs".
189 */
190 public void
197psignals()
191psignals(void)
198{
192{
199 register int tsignals;
193 int tsignals;
200
201 if ((tsignals = sigs) == 0)
202 return;
203 sigs = 0;
204
205#ifdef SIGTSTP
206 if (tsignals & S_STOP)
207 {

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195 if ((tsignals = sigs) == 0)
196 return;
197 sigs = 0;
198
199#ifdef SIGTSTP
200 if (tsignals & S_STOP)
201 {

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