annotate test/checkkeys.c @ 1151:be9c9c8f6d53

Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe if SDL is built with a non-cdecl calling convention, and it's just generally bad practice anyhow. Now programs explicitly call SDL_Quit() where appropriate, wrap SDL_Quit() in a cdecl function where it can't be avoided, and rely on the parachute where a crash might have hit the atexit() before (these ARE test programs, after all!).
author Ryan C. Gordon <icculus@icculus.org>
date Wed, 28 Sep 2005 11:36:20 +0000
parents 806fcbde0af3
children 7c7ddaf195bf
rev   line source
0
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1
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2 /* Simple program: Loop, watching keystrokes
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3 Note that you need to call SDL_PollEvent() or SDL_WaitEvent() to
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4 pump the event loop and catch keystrokes.
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5 */
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6
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7 #include <stdio.h>
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8 #include <stdlib.h>
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9 #include <string.h>
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10
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11 #include "SDL.h"
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12
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13 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
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14 static void quit(int rc)
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15 {
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16 SDL_Quit();
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17 exit(rc);
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18 }
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19
0
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20 static void print_modifiers(void)
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21 {
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22 int mod;
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23 printf(" modifiers:");
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24 mod = SDL_GetModState();
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25 if(!mod) {
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26 printf(" (none)");
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27 return;
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28 }
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29 if(mod & KMOD_LSHIFT)
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30 printf(" LSHIFT");
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31 if(mod & KMOD_RSHIFT)
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32 printf(" RSHIFT");
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33 if(mod & KMOD_LCTRL)
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34 printf(" LCTRL");
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35 if(mod & KMOD_RCTRL)
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36 printf(" RCTRL");
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37 if(mod & KMOD_LALT)
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38 printf(" LALT");
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39 if(mod & KMOD_RALT)
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40 printf(" RALT");
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41 if(mod & KMOD_LMETA)
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42 printf(" LMETA");
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43 if(mod & KMOD_RMETA)
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44 printf(" RMETA");
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45 if(mod & KMOD_NUM)
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46 printf(" NUM");
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47 if(mod & KMOD_CAPS)
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48 printf(" CAPS");
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49 if(mod & KMOD_MODE)
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50 printf(" MODE");
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51 }
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52
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53 static void PrintKey(SDL_keysym *sym, int pressed)
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54 {
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55 /* Print the keycode, name and state */
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56 if ( sym->sym ) {
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57 printf("Key %s: %d-%s ", pressed ? "pressed" : "released",
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58 sym->sym, SDL_GetKeyName(sym->sym));
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59 } else {
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60 printf("Unknown Key (scancode = %d) %s ", sym->scancode,
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61 pressed ? "pressed" : "released");
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62 }
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63
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64 /* Print the translated character, if one exists */
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65 if ( sym->unicode ) {
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66 /* Is it a control-character? */
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67 if ( sym->unicode < ' ' ) {
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68 printf(" (^%c)", sym->unicode+'@');
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69 } else {
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70 #ifdef UNICODE
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71 printf(" (%c)", sym->unicode);
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72 #else
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73 /* This is a Latin-1 program, so only show 8-bits */
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74 if ( !(sym->unicode & 0xFF00) )
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75 printf(" (%c)", sym->unicode);
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76 #endif
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77 }
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78 }
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79 print_modifiers();
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80 printf("\n");
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81 }
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82
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83 int main(int argc, char *argv[])
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84 {
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85 SDL_Event event;
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86 int done;
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87 Uint32 videoflags;
0
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88
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89 /* Initialize SDL */
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90 if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
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91 fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError());
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92 return(1);
0
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93 }
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94
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95 videoflags = SDL_SWSURFACE;
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96 while( argc > 1 ) {
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97 --argc;
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98 if ( argv[argc] && !strcmp(argv[argc], "-fullscreen") ) {
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99 videoflags |= SDL_FULLSCREEN;
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100 } else {
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101 fprintf(stderr, "Usage: %s [-fullscreen]\n", argv[0]);
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102 quit(1);
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103 }
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104 }
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105
0
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106 /* Set 640x480 video mode */
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107 if ( SDL_SetVideoMode(640, 480, 0, videoflags) == NULL ) {
0
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108 fprintf(stderr, "Couldn't set 640x480 video mode: %s\n",
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109 SDL_GetError());
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110 quit(2);
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111 }
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112
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113 /* Enable UNICODE translation for keyboard input */
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114 SDL_EnableUNICODE(1);
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115
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116 /* Enable auto repeat for keyboard input */
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117 SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY,
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118 SDL_DEFAULT_REPEAT_INTERVAL);
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119
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120 /* Watch keystrokes */
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121 done = 0;
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122 while ( !done ) {
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123 /* Check for events */
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124 SDL_WaitEvent(&event);
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125 switch (event.type) {
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126 case SDL_KEYDOWN:
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127 PrintKey(&event.key.keysym, 1);
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128 break;
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129 case SDL_KEYUP:
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130 PrintKey(&event.key.keysym, 0);
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131 break;
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132 case SDL_MOUSEBUTTONDOWN:
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133 /* Any button press quits the app... */
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134 case SDL_QUIT:
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135 done = 1;
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136 break;
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137 default:
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138 break;
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139 }
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140 }
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141
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142 SDL_Quit();
0
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143 return(0);
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144 }