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annotate src/power/linux/SDL_syspower.c @ 3319:63d4517fc4ac

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Fixed bug #777 Implemented SDL_GetPlatform()
author Sam Lantinga <slouken@libsdl.org>
date Sat, 26 Sep 2009 10:32:14 +0000
parents 65fdb0961d7c
children f7b03b6838cb
rev   line source
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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 <sys/types.h>
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31 #include <sys/stat.h>
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32 #include <dirent.h>
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33 #include <fcntl.h>
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34
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35 #include "SDL_power.h"
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36
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37 static const char *proc_apm_path = "/proc/apm";
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38 static const char *proc_acpi_battery_path = "/proc/acpi/battery";
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39 static const char *proc_acpi_ac_adapter_path = "/proc/acpi/ac_adapter";
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40
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41 static int open_acpi_file(const char *base, const char *node, const char *key)
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42 {
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43 const size_t pathlen = strlen(base) + strlen(node) + strlen(key) + 3;
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44 char *path = (char *) alloca(pathlen);
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45 if (path == NULL) {
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46 return -1; /* oh well. */
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47 }
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48
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49 snprintf(path, pathlen, "%s/%s/%s", base, node, key);
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50 return open(path, O_RDONLY);
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51 }
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52
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53
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54 static SDL_bool
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55 load_acpi_file(const char *base, const char *node, const char *key,
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56 char *buf, size_t buflen)
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57 {
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58 ssize_t br = 0;
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59 const int fd = open_acpi_file(base, node, key);
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60 if (fd == -1) {
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61 return SDL_FALSE;
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62 }
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63 br = read(fd, buf, buflen-1);
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64 close(fd);
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65 if (br < 0) {
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66 return SDL_FALSE;
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67 }
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68 buf[br] = '\0'; // null-terminate the string.
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69 return SDL_TRUE;
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70 }
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71
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72
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73 static SDL_bool
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74 make_proc_acpi_key_val(char **_ptr, char **_key, char **_val)
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75 {
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76 char *ptr = *_ptr;
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77
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78 while (*ptr == ' ') {
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79 ptr++; /* skip whitespace. */
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80 }
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81
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82 if (*ptr == '\0') {
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83 return SDL_FALSE; /* EOF. */
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84 }
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85
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86 *_key = ptr;
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87
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88 while ((*ptr != ':') && (*ptr != '\0')) {
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89 ptr++;
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90 }
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91
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92 if (*ptr == '\0') {
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93 return SDL_FALSE; /* (unexpected) EOF. */
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94 }
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95
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96 *(ptr++) = '\0'; /* terminate the key. */
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97
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98 while ((*ptr == ' ') && (*ptr != '\0')) {
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99 ptr++; /* skip whitespace. */
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100 }
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101
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102 if (*ptr == '\0') {
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103 return SDL_FALSE; /* (unexpected) EOF. */
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104 }
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105
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106 *_val = ptr;
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107
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108 while ((*ptr != '\n') && (*ptr != '\0')) {
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109 ptr++;
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110 }
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111
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112 if (*ptr != '\0') {
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113 *(ptr++) = '\0'; /* terminate the value. */
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114 }
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115
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116 *_ptr = ptr; /* store for next time. */
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117 return SDL_TRUE;
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118 }
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119
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120 static void
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121 check_proc_acpi_battery(const char * node, SDL_bool * have_battery,
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122 SDL_bool * charging, int *seconds, int *percent)
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123 {
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124 const char *base = proc_acpi_battery_path;
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125 char info[1024];
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126 char state[1024];
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127 char *ptr = NULL;
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128 char *key = NULL;
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129 char *val = NULL;
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130 SDL_bool charge = SDL_FALSE;
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131 SDL_bool choose = SDL_FALSE;
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132 SDL_bool is_ac = SDL_FALSE;
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133 int maximum = -1;
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parents: 3186
diff changeset
134 int remaining = -1;
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diff changeset
135 int secs = -1;
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diff changeset
136 int pct = -1;
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137
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diff changeset
138 if (!load_acpi_file(base, node, "state", state, sizeof (state))) {
3203
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diff changeset
139 return;
3205
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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parents: 3204
diff changeset
140 } else if (!load_acpi_file(base, node, "info", info, sizeof (info))) {
3203
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diff changeset
141 return;
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
Ryan C. Gordon <icculus@icculus.org>
parents: 3186
diff changeset
142 }
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diff changeset
143
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144 ptr = &state[0];
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diff changeset
145 while (make_proc_acpi_key_val(&ptr, &key, &val)) {
3203
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diff changeset
146 if (strcmp(key, "present") == 0) {
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diff changeset
147 if (strcmp(val, "yes") == 0) {
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diff changeset
148 *have_battery = SDL_TRUE;
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diff changeset
149 }
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diff changeset
150 } else if (strcmp(key, "charging state") == 0) {
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diff changeset
151 /* !!! FIXME: what exactly _does_ charging/discharging mean? */
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diff changeset
152 if (strcmp(val, "charging/discharging") == 0) {
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diff changeset
153 charge = SDL_TRUE;
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diff changeset
154 } else if (strcmp(val, "charging") == 0) {
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diff changeset
155 charge = SDL_TRUE;
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diff changeset
156 }
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diff changeset
157 } else if (strcmp(key, "remaining capacity") == 0) {
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diff changeset
158 char *endptr = NULL;
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diff changeset
159 const int cvt = (int) strtol(val, &endptr, 10);
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diff changeset
160 if (*endptr == ' ') {
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diff changeset
161 remaining = cvt;
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162 }
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
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diff changeset
163 }
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
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164 }
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165
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diff changeset
166 ptr = &info[0];
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f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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diff changeset
167 while (make_proc_acpi_key_val(&ptr, &key, &val)) {
3203
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diff changeset
168 if (strcmp(key, "design capacity") == 0) {
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diff changeset
169 char *endptr = NULL;
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diff changeset
170 const int cvt = (int) strtol(val, &endptr, 10);
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diff changeset
171 if (*endptr == ' ') {
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diff changeset
172 maximum = cvt;
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diff changeset
173 }
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
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diff changeset
174 }
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diff changeset
175 }
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diff changeset
176
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diff changeset
177 if ((maximum >= 0) && (remaining >= 0)) {
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diff changeset
178 pct = (int) ((((float) remaining) / ((float) maximum)) * 100.0f);
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diff changeset
179 if (pct < 0) {
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diff changeset
180 pct = 0;
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diff changeset
181 } else if (pct > 100) {
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diff changeset
182 pct = 100;
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diff changeset
183 }
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
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diff changeset
184 }
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diff changeset
185
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diff changeset
186 /* !!! FIXME: calculate (secs). */
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diff changeset
187
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diff changeset
188 /*
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
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189 * We pick the battery that claims to have the most minutes left.
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diff changeset
190 * (failing a report of minutes, we'll take the highest percent.)
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diff changeset
191 */
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diff changeset
192 if ((secs < 0) && (*seconds < 0)) {
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diff changeset
193 if ((pct < 0) && (*percent < 0)) {
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parents: 3186
diff changeset
194 choose = SDL_TRUE; /* at least we know there's a battery. */
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diff changeset
195 }
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
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parents: 3186
diff changeset
196 if (pct > *percent) {
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diff changeset
197 choose = SDL_TRUE;
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diff changeset
198 }
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
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diff changeset
199 } else if (secs > *seconds) {
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diff changeset
200 choose = SDL_TRUE;
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
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diff changeset
201 }
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
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parents: 3186
diff changeset
202
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parents: 3186
diff changeset
203 if (choose) {
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
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parents: 3186
diff changeset
204 *seconds = secs;
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parents: 3186
diff changeset
205 *percent = pct;
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parents: 3186
diff changeset
206 *charging = charge;
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diff changeset
207 }
3205
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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diff changeset
208 }
3203
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diff changeset
209
3205
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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diff changeset
210 static void
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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diff changeset
211 check_proc_acpi_ac_adapter(const char * node, SDL_bool * have_ac)
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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parents: 3204
diff changeset
212 {
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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diff changeset
213 const char *base = proc_acpi_ac_adapter_path;
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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diff changeset
214 char state[256];
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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diff changeset
215 char *ptr = NULL;
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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parents: 3204
diff changeset
216 char *key = NULL;
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
Ryan C. Gordon <icculus@icculus.org>
parents: 3204
diff changeset
217 char *val = NULL;
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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parents: 3204
diff changeset
218 SDL_bool charge = SDL_FALSE;
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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parents: 3204
diff changeset
219 SDL_bool choose = SDL_FALSE;
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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parents: 3204
diff changeset
220 SDL_bool is_ac = SDL_FALSE;
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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parents: 3204
diff changeset
221 int maximum = -1;
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
Ryan C. Gordon <icculus@icculus.org>
parents: 3204
diff changeset
222 int remaining = -1;
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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parents: 3204
diff changeset
223 int secs = -1;
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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parents: 3204
diff changeset
224 int pct = -1;
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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parents: 3204
diff changeset
225
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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parents: 3204
diff changeset
226 if (!load_acpi_file(base, node, "state", state, sizeof (state))) {
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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parents: 3204
diff changeset
227 return;
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
Ryan C. Gordon <icculus@icculus.org>
parents: 3204
diff changeset
228 }
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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parents: 3204
diff changeset
229
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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diff changeset
230 ptr = &state[0];
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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parents: 3204
diff changeset
231 while (make_proc_acpi_key_val(&ptr, &key, &val)) {
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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parents: 3204
diff changeset
232 if (strcmp(key, "state") == 0) {
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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parents: 3204
diff changeset
233 if (strcmp(val, "on-line") == 0) {
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
Ryan C. Gordon <icculus@icculus.org>
parents: 3204
diff changeset
234 *have_ac = SDL_TRUE;
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
Ryan C. Gordon <icculus@icculus.org>
parents: 3204
diff changeset
235 }
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
Ryan C. Gordon <icculus@icculus.org>
parents: 3204
diff changeset
236 }
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
Ryan C. Gordon <icculus@icculus.org>
parents: 3204
diff changeset
237 }
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
238 }
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
239
3205
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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diff changeset
240
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
241 SDL_bool
3186
Sam Lantinga <slouken@libsdl.org>
parents: 3174
diff changeset
242 SDL_GetPowerInfo_Linux_proc_acpi(SDL_PowerState * state,
Sam Lantinga <slouken@libsdl.org>
parents: 3174
diff changeset
243 int *seconds, int *percent)
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
244 {
3203
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
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parents: 3186
diff changeset
245 struct dirent *dent = NULL;
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
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parents: 3186
diff changeset
246 DIR *dirp = NULL;
3205
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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parents: 3204
diff changeset
247 SDL_bool have_battery = SDL_FALSE;
3203
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
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diff changeset
248 SDL_bool have_ac = SDL_FALSE;
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
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parents: 3186
diff changeset
249 SDL_bool charging = SDL_FALSE;
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
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parents: 3186
diff changeset
250
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
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parents: 3186
diff changeset
251 *seconds = -1;
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
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parents: 3186
diff changeset
252 *percent = -1;
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
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parents: 3186
diff changeset
253 *state = SDL_POWERSTATE_UNKNOWN;
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parents: 3186
diff changeset
254
3205
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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parents: 3204
diff changeset
255 dirp = opendir(proc_acpi_battery_path);
3203
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
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parents: 3186
diff changeset
256 if (dirp == NULL) {
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
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parents: 3186
diff changeset
257 return SDL_FALSE; /* can't use this interface. */
3205
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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diff changeset
258 } else {
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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parents: 3204
diff changeset
259 while ((dent = readdir(dirp)) != NULL) {
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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parents: 3204
diff changeset
260 const char *node = dent->d_name;
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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parents: 3204
diff changeset
261 check_proc_acpi_battery(node, &have_battery, &charging,
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
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parents: 3204
diff changeset
262 seconds, percent);
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
Ryan C. Gordon <icculus@icculus.org>
parents: 3204
diff changeset
263 }
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
Ryan C. Gordon <icculus@icculus.org>
parents: 3204
diff changeset
264 closedir(dirp);
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
265 }
3203
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
Ryan C. Gordon <icculus@icculus.org>
parents: 3186
diff changeset
266
3205
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
Ryan C. Gordon <icculus@icculus.org>
parents: 3204
diff changeset
267 dirp = opendir(proc_acpi_ac_adapter_path);
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
Ryan C. Gordon <icculus@icculus.org>
parents: 3204
diff changeset
268 if (dirp == NULL) {
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
Ryan C. Gordon <icculus@icculus.org>
parents: 3204
diff changeset
269 return SDL_FALSE; /* can't use this interface. */
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
Ryan C. Gordon <icculus@icculus.org>
parents: 3204
diff changeset
270 } else {
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
Ryan C. Gordon <icculus@icculus.org>
parents: 3204
diff changeset
271 while ((dent = readdir(dirp)) != NULL) {
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
Ryan C. Gordon <icculus@icculus.org>
parents: 3204
diff changeset
272 const char *node = dent->d_name;
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
Ryan C. Gordon <icculus@icculus.org>
parents: 3204
diff changeset
273 check_proc_acpi_ac_adapter(node, &have_ac);
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
Ryan C. Gordon <icculus@icculus.org>
parents: 3204
diff changeset
274 }
f9a4aa1e1b34 Linux /proc/acpi: check for ac_adapter states, other cleanup.
Ryan C. Gordon <icculus@icculus.org>
parents: 3204
diff changeset
275 closedir(dirp);
3203
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
Ryan C. Gordon <icculus@icculus.org>
parents: 3186
diff changeset
276 }
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
Ryan C. Gordon <icculus@icculus.org>
parents: 3186
diff changeset
277
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
Ryan C. Gordon <icculus@icculus.org>
parents: 3186
diff changeset
278 if (!have_battery) {
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
Ryan C. Gordon <icculus@icculus.org>
parents: 3186
diff changeset
279 *state = SDL_POWERSTATE_NO_BATTERY;
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
Ryan C. Gordon <icculus@icculus.org>
parents: 3186
diff changeset
280 } else if (charging) {
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
Ryan C. Gordon <icculus@icculus.org>
parents: 3186
diff changeset
281 *state = SDL_POWERSTATE_CHARGING;
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
Ryan C. Gordon <icculus@icculus.org>
parents: 3186
diff changeset
282 } else if (have_ac) {
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
Ryan C. Gordon <icculus@icculus.org>
parents: 3186
diff changeset
283 *state = SDL_POWERSTATE_CHARGED;
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
Ryan C. Gordon <icculus@icculus.org>
parents: 3186
diff changeset
284 } else {
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
Ryan C. Gordon <icculus@icculus.org>
parents: 3186
diff changeset
285 *state = SDL_POWERSTATE_ON_BATTERY;
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
Ryan C. Gordon <icculus@icculus.org>
parents: 3186
diff changeset
286 }
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
Ryan C. Gordon <icculus@icculus.org>
parents: 3186
diff changeset
287
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
Ryan C. Gordon <icculus@icculus.org>
parents: 3186
diff changeset
288 return SDL_TRUE; /* definitive answer. */
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
289 }
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
290
3203
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
Ryan C. Gordon <icculus@icculus.org>
parents: 3186
diff changeset
291
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
292 static SDL_bool
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
293 next_string(char **_ptr, char **_str)
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
294 {
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
295 char *ptr = *_ptr;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
296 char *str = *_str;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
297
3186
Sam Lantinga <slouken@libsdl.org>
parents: 3174
diff changeset
298 while (*ptr == ' ') { /* skip any spaces... */
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
299 ptr++;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
300 }
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
301
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
302 if (*ptr == '\0') {
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
303 return SDL_FALSE;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
304 }
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
305
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
306 str = ptr;
3203
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
Ryan C. Gordon <icculus@icculus.org>
parents: 3186
diff changeset
307 while ((*ptr != ' ') && (*ptr != '\n') && (*ptr != '\0'))
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
308 ptr++;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
309
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
310 if (*ptr != '\0')
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
311 *(ptr++) = '\0';
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
312
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
313 *_str = str;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
314 *_ptr = ptr;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
315 return SDL_TRUE;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
316 }
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
317
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
318 static SDL_bool
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
319 int_string(char *str, int *val)
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
320 {
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
321 char *endptr = NULL;
3206
f735edf338d3 Linux /proc/apm: handle hex and decimal (and octal!) values.
Ryan C. Gordon <icculus@icculus.org>
parents: 3205
diff changeset
322 *val = (int) strtol(str, &endptr, 0);
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
323 return ((*str != '\0') && (*endptr == '\0'));
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
324 }
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
325
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
326 /* http://lxr.linux.no/linux+v2.6.29/drivers/char/apm-emulation.c */
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
327 SDL_bool
3186
Sam Lantinga <slouken@libsdl.org>
parents: 3174
diff changeset
328 SDL_GetPowerInfo_Linux_proc_apm(SDL_PowerState * state,
Sam Lantinga <slouken@libsdl.org>
parents: 3174
diff changeset
329 int *seconds, int *percent)
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
330 {
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
331 SDL_bool need_details = SDL_FALSE;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
332 int ac_status = 0;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
333 int battery_status = 0;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
334 int battery_flag = 0;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
335 int battery_percent = 0;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
336 int battery_time = 0;
3207
65fdb0961d7c Moved hardcoding of "/proc/apm" elsewhere.
Ryan C. Gordon <icculus@icculus.org>
parents: 3206
diff changeset
337 const int fd = open(proc_apm_path, O_RDONLY);
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
338 char buf[128];
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
339 char *ptr = &buf[0];
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
340 char *str = NULL;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
341 ssize_t br;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
342
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
343 if (fd == -1) {
3186
Sam Lantinga <slouken@libsdl.org>
parents: 3174
diff changeset
344 return SDL_FALSE; /* can't use this interface. */
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
345 }
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
346
3203
790cbbda6429 Power: First shot at Linux /proc/acpi/battery support.
Ryan C. Gordon <icculus@icculus.org>
parents: 3186
diff changeset
347 br = read(fd, buf, sizeof (buf) - 1);
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
348 close(fd);
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
349
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
350 if (br < 0) {
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
351 return SDL_FALSE;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
352 }
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
353
3186
Sam Lantinga <slouken@libsdl.org>
parents: 3174
diff changeset
354 buf[br] = '\0'; // null-terminate the string.
Sam Lantinga <slouken@libsdl.org>
parents: 3174
diff changeset
355 if (!next_string(&ptr, &str)) { /* driver version */
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
356 return SDL_FALSE;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
357 }
3186
Sam Lantinga <slouken@libsdl.org>
parents: 3174
diff changeset
358 if (!next_string(&ptr, &str)) { /* BIOS version */
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
359 return SDL_FALSE;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
360 }
3186
Sam Lantinga <slouken@libsdl.org>
parents: 3174
diff changeset
361 if (!next_string(&ptr, &str)) { /* APM flags */
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
362 return SDL_FALSE;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
363 }
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
364
3186
Sam Lantinga <slouken@libsdl.org>
parents: 3174
diff changeset
365 if (!next_string(&ptr, &str)) { /* AC line status */
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
366 return SDL_FALSE;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
367 } else if (!int_string(str, &ac_status)) {
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
368 return SDL_FALSE;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
369 }
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
370
3186
Sam Lantinga <slouken@libsdl.org>
parents: 3174
diff changeset
371 if (!next_string(&ptr, &str)) { /* battery status */
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
372 return SDL_FALSE;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
373 } else if (!int_string(str, &battery_status)) {
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
374 return SDL_FALSE;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
375 }
3186
Sam Lantinga <slouken@libsdl.org>
parents: 3174
diff changeset
376 if (!next_string(&ptr, &str)) { /* battery flag */
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
377 return SDL_FALSE;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
378 } else if (!int_string(str, &battery_flag)) {
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
379 return SDL_FALSE;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
380 }
3186
Sam Lantinga <slouken@libsdl.org>
parents: 3174
diff changeset
381 if (!next_string(&ptr, &str)) { /* remaining battery life percent */
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
382 return SDL_FALSE;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
383 }
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
384 if (str[strlen(str) - 1] == '%') {
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
385 str[strlen(str) - 1] = '\0';
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
386 }
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
387 if (!int_string(str, &battery_percent)) {
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
388 return SDL_FALSE;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
389 }
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
390
3186
Sam Lantinga <slouken@libsdl.org>
parents: 3174
diff changeset
391 if (!next_string(&ptr, &str)) { /* remaining battery life time */
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
392 return SDL_FALSE;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
393 } else if (!int_string(str, &battery_time)) {
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
394 return SDL_FALSE;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
395 }
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
396
3186
Sam Lantinga <slouken@libsdl.org>
parents: 3174
diff changeset
397 if (!next_string(&ptr, &str)) { /* remaining battery life time units */
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
398 return SDL_FALSE;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
399 } else if (strcmp(str, "min") == 0) {
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
400 battery_time *= 60;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
401 }
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
402
3186
Sam Lantinga <slouken@libsdl.org>
parents: 3174
diff changeset
403 if (battery_flag == 0xFF) { /* unknown state */
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
404 *state = SDL_POWERSTATE_UNKNOWN;
3186
Sam Lantinga <slouken@libsdl.org>
parents: 3174
diff changeset
405 } else if (battery_flag & (1 << 7)) { /* no battery */
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
406 *state = SDL_POWERSTATE_NO_BATTERY;
3186
Sam Lantinga <slouken@libsdl.org>
parents: 3174
diff changeset
407 } else if (battery_flag & (1 << 3)) { /* charging */
3170
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
408 *state = SDL_POWERSTATE_CHARGING;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
409 need_details = SDL_TRUE;
b7a48f533966 Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
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410 } else if (ac_status == 1) {
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411 *state = SDL_POWERSTATE_CHARGED; /* on AC, not charging. */
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412 need_details = SDL_TRUE;
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413 } else {
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414 *state = SDL_POWERSTATE_ON_BATTERY;
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415 need_details = SDL_TRUE;
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416 }
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417
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418 *percent = -1;
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419 *seconds = -1;
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420 if (need_details) {
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421 const int pct = battery_percent;
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422 const int secs = battery_time;
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423
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424 if (pct >= 0) { /* -1 == unknown */
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425 *percent = (pct > 100) ? 100 : pct; /* clamp between 0%, 100% */
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426 }
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427 if (secs >= 0) { /* -1 == unknown */
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428 *seconds = secs;
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429 }
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430 }
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431
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432 return SDL_TRUE;
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433 }
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434
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435 #endif /* SDL_POWER_LINUX */
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436 #endif /* SDL_POWER_DISABLED */
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437
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438 /* vi: set ts=4 sw=4 expandtab: */