Mercurial > sdl-ios-xcode
annotate src/power/linux/SDL_syspower.c @ 3170:b7a48f533966
Initial work on power subsystem for SDL 1.3.
author | Ryan C. Gordon <icculus@icculus.org> |
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date | Sun, 07 Jun 2009 06:06:35 +0000 |
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children | c8b9c6d27476 |
rev | line source |
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3170
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Initial work on power subsystem for SDL 1.3.
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1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997-2009 Sam Lantinga |
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4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Lesser General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 Lesser General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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18 |
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19 Sam Lantinga |
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20 slouken@libsdl.org |
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21 */ |
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22 #include "SDL_config.h" |
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23 |
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24 #ifndef SDL_POWER_DISABLED |
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25 #ifdef SDL_POWER_LINUX |
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26 |
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27 #include <stdio.h> |
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28 #include <unistd.h> |
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29 |
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30 #include "SDL_power.h" |
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31 |
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32 SDL_bool |
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33 SDL_GetPowerInfo_Linux_sys_power(SDL_PowerState *state, |
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34 int *seconds, int *percent) |
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35 { |
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36 return SDL_FALSE; /* !!! FIXME: write me. */ |
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37 #if 0 |
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38 const int fd = open("/sys/power", O_RDONLY); |
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39 if (fd == -1) { |
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40 return SDL_FALSE; /* can't use this interface. */ |
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41 } |
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42 return SDL_TRUE; |
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43 #endif |
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44 } |
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45 |
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46 SDL_bool |
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47 SDL_GetPowerInfo_Linux_sys_proc_acpi(SDL_PowerState *state, |
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48 int *seconds, int *percent) |
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49 { |
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50 return SDL_FALSE; /* !!! FIXME: write me. */ |
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51 #if 0 |
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52 const int fd = open("/proc/acpi", O_RDONLY); |
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53 if (fd == -1) { |
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54 return SDL_FALSE; /* can't use this interface. */ |
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55 } |
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56 return SDL_TRUE; |
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57 #endif |
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58 } |
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59 |
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60 static SDL_bool |
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61 next_string(char **_ptr, char **_str) |
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62 { |
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63 char *ptr = *_ptr; |
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64 char *str = *_str; |
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65 |
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66 while (*ptr == ' ') { /* skip any spaces... */ |
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67 ptr++; |
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68 } |
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69 |
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70 if (*ptr == '\0') { |
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71 return SDL_FALSE; |
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72 } |
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73 |
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74 str = ptr; |
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75 while ((*ptr != ' ') && (*ptr != '\0')) |
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76 ptr++; |
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77 |
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78 if (*ptr != '\0') |
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79 *(ptr++) = '\0'; |
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80 |
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81 *_str = str; |
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82 *_ptr = ptr; |
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83 return SDL_TRUE; |
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84 } |
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85 |
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86 static SDL_bool |
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87 int_string(char *str, int *val) |
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88 { |
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89 char *endptr = NULL; |
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90 *val = (int) strtol(str+2, &endptr, 16); |
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91 return ((*str != '\0') && (*endptr == '\0')); |
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92 } |
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93 |
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94 /* http://lxr.linux.no/linux+v2.6.29/drivers/char/apm-emulation.c */ |
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95 SDL_bool |
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96 SDL_GetPowerInfo_Linux_sys_proc_apm(SDL_PowerState *state, |
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97 int *seconds, int *percent) |
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98 { |
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99 SDL_bool need_details = SDL_FALSE; |
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100 int ac_status = 0; |
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101 int battery_status = 0; |
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102 int battery_flag = 0; |
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103 int battery_percent = 0; |
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104 int battery_time = 0; |
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105 const int fd = open("/proc/apm", O_RDONLY); |
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106 char buf[128]; |
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107 char *ptr = &buf[0]; |
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108 char *str = NULL; |
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109 ssize_t br; |
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110 |
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111 if (fd == -1) { |
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112 return SDL_FALSE; /* can't use this interface. */ |
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113 } |
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114 |
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115 br = read(fd, buf, sizeof (buf) - 1); |
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116 close(fd); |
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117 |
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118 if (br < 0) { |
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119 return SDL_FALSE; |
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120 } |
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121 |
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122 buf[br] = '\0'; // null-terminate the string. |
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123 if (!next_string(&ptr, &str)) { /* driver version */ |
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124 return SDL_FALSE; |
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125 } |
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126 if (!next_string(&ptr, &str)) { /* BIOS version */ |
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127 return SDL_FALSE; |
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128 } |
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129 if (!next_string(&ptr, &str)) { /* APM flags */ |
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130 return SDL_FALSE; |
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131 } |
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132 |
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133 if (!next_string(&ptr, &str)) { /* AC line status */ |
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134 return SDL_FALSE; |
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135 } else if (!int_string(str, &ac_status)) { |
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136 return SDL_FALSE; |
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137 } |
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138 |
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139 if (!next_string(&ptr, &str)) { /* battery status */ |
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140 return SDL_FALSE; |
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141 } else if (!int_string(str, &battery_status)) { |
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142 return SDL_FALSE; |
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143 } |
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144 if (!next_string(&ptr, &str)) { /* battery flag */ |
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145 return SDL_FALSE; |
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146 } else if (!int_string(str, &battery_flag)) { |
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147 return SDL_FALSE; |
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148 } |
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149 if (!next_string(&ptr, &str)) { /* remaining battery life percent */ |
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150 return SDL_FALSE; |
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151 } |
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152 if (str[strlen(str) - 1] == '%') { |
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153 str[strlen(str) - 1] = '\0'; |
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154 } |
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155 if (!int_string(str, &battery_percent)) { |
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156 return SDL_FALSE; |
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157 } |
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158 |
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159 if (!next_string(&ptr, &str)) { /* remaining battery life time */ |
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160 return SDL_FALSE; |
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161 } else if (!int_string(str, &battery_time)) { |
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162 return SDL_FALSE; |
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163 } |
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164 |
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165 if (!next_string(&ptr, &str)) { /* remaining battery life time units */ |
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166 return SDL_FALSE; |
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167 } else if (strcmp(str, "min") == 0) { |
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168 battery_time *= 60; |
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169 } |
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170 |
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171 if (battery_flag == 0xFF) { /* unknown state */ |
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172 *state = SDL_POWERSTATE_UNKNOWN; |
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173 } else if (battery_flag & (1 << 7)) { /* no battery */ |
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174 *state = SDL_POWERSTATE_NO_BATTERY; |
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175 } else if (battery_flag & (1 << 3)) { /* charging */ |
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176 *state = SDL_POWERSTATE_CHARGING; |
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177 need_details = SDL_TRUE; |
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178 } else if (ac_status == 1) { |
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179 *state = SDL_POWERSTATE_CHARGED; /* on AC, not charging. */ |
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180 need_details = SDL_TRUE; |
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181 } else { |
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182 *state = SDL_POWERSTATE_ON_BATTERY; |
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183 need_details = SDL_TRUE; |
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184 } |
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185 |
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186 *percent = -1; |
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187 *seconds = -1; |
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188 if (need_details) { |
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189 const int pct = battery_percent; |
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190 const int secs = battery_time; |
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191 |
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192 if (pct >= 0) { /* -1 == unknown */ |
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193 *percent = (pct > 100) ? 100 : pct; /* clamp between 0%, 100% */ |
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194 } |
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195 if (secs >= 0) { /* -1 == unknown */ |
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196 *seconds = secs; |
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197 } |
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198 } |
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199 |
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200 return SDL_TRUE; |
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201 } |
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202 |
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203 #endif /* SDL_POWER_LINUX */ |
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204 #endif /* SDL_POWER_DISABLED */ |
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205 |
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206 /* vi: set ts=4 sw=4 expandtab: */ |
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207 |