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Reworked the time get/set functions

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4522 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Linus Nielsen Feltzing 2004-04-20 10:23:57 +00:00
parent 18d5d30c1c
commit 7ddf0d673d
10 changed files with 158 additions and 131 deletions
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108
apps/settings.c
View file

@ -17,7 +17,6 @@
* KIND, either express or implied. * KIND, either express or implied.
* *
****************************************************************************/ ****************************************************************************/
#include <stdio.h> #include <stdio.h>
#include "config.h" #include "config.h"
#include "kernel.h" #include "kernel.h"
@ -47,6 +46,7 @@
#include "errno.h" #include "errno.h"
#include "system.h" #include "system.h"
#include "misc.h" #include "misc.h"
#include "timefuncs.h"
#ifdef HAVE_LCD_BITMAP #ifdef HAVE_LCD_BITMAP
#include "icons.h" #include "icons.h"
#include "font.h" #include "font.h"
@ -1963,17 +1963,33 @@ bool set_option(char* string, void* variable, enum optiontype type,
#ifdef HAVE_LCD_BITMAP #ifdef HAVE_LCD_BITMAP
/* little helper function for voice output */ /* little helper function for voice output */
static void say_time(int cursorpos, int timedate[]) static void say_time(int cursorpos, struct tm *tm)
{ {
const int unit[] = { UNIT_HOUR, UNIT_MIN, UNIT_SEC, 0, 0, 0 }; const int unit[] = { UNIT_HOUR, UNIT_MIN, UNIT_SEC, 0, 0, 0 };
int value = timedate[cursorpos]; int value = 0;
if (!global_settings.talk_menu) if (!global_settings.talk_menu)
return; return;
if (cursorpos == 3) /* year */ switch(cursorpos)
value += 2000; {
case 0:
value = tm->tm_hour;
break;
case 1:
value = tm->tm_min;
break;
case 2:
value = tm->tm_sec;
break;
case 3:
value = tm->tm_year + 1900;
break;
case 5:
value = tm->tm_mday;
break;
}
if (cursorpos == 4) /* month */ if (cursorpos == 4) /* month */
talk_id(LANG_MONTH_JANUARY + value - 1, false); talk_id(LANG_MONTH_JANUARY + value - 1, false);
else else
@ -1984,7 +2000,7 @@ static void say_time(int cursorpos, int timedate[])
#define INDEX_X 0 #define INDEX_X 0
#define INDEX_Y 1 #define INDEX_Y 1
#define INDEX_WIDTH 2 #define INDEX_WIDTH 2
bool set_time(char* string, int timedate[]) bool set_time_screen(char* string, struct tm *tm)
{ {
bool done = false; bool done = false;
int button; int button;
@ -2024,6 +2040,7 @@ bool set_time(char* string, int timedate[])
int monthname_len = 0, dayname_len = 0; int monthname_len = 0, dayname_len = 0;
int *valptr = NULL;
#ifdef HAVE_LCD_BITMAP #ifdef HAVE_LCD_BITMAP
if(global_settings.statusbar) if(global_settings.statusbar)
@ -2036,27 +2053,27 @@ bool set_time(char* string, int timedate[])
while ( !done ) { while ( !done ) {
/* calculate the number of days in febuary */ /* calculate the number of days in febuary */
realyear = timedate[3] + 2000; realyear = tm->tm_year + 1900;
if((realyear % 4 == 0 && !(realyear % 100 == 0)) || realyear % 400 == 0) if((realyear % 4 == 0 && !(realyear % 100 == 0)) || realyear % 400 == 0)
daysinmonth[1] = 29; daysinmonth[1] = 29;
else else
daysinmonth[1] = 28; daysinmonth[1] = 28;
/* fix day if month or year changed */ /* fix day if month or year changed */
if (timedate[5] > daysinmonth[timedate[4] - 1]) if (tm->tm_mday > daysinmonth[tm->tm_mon])
timedate[5] = daysinmonth[timedate[4] - 1]; tm->tm_mday = daysinmonth[tm->tm_mon];
/* calculate day of week */ /* calculate day of week */
julianday = 0; julianday = 0;
for(i = 0; i < timedate[4] - 1; i++) { for(i = 0; i < tm->tm_mon; i++) {
julianday += daysinmonth[i]; julianday += daysinmonth[i];
} }
julianday += timedate[5]; julianday += tm->tm_mday;
timedate[6] = (realyear + julianday + (realyear - 1) / 4 - tm->tm_wday = (realyear + julianday + (realyear - 1) / 4 -
(realyear - 1) / 100 + (realyear - 1) / 400 + 7 - 1) % 7; (realyear - 1) / 100 + (realyear - 1) / 400 + 7 - 1) % 7;
snprintf(buffer, sizeof(buffer), "%02d:%02d:%02d ", snprintf(buffer, sizeof(buffer), "%02d:%02d:%02d ",
timedate[0], timedate[1], timedate[2]); tm->tm_hour, tm->tm_min, tm->tm_sec);
lcd_puts(0, 1, buffer); lcd_puts(0, 1, buffer);
/* recalculate the positions and offsets */ /* recalculate the positions and offsets */
@ -2091,17 +2108,17 @@ bool set_time(char* string, int timedate[])
lcd_getstringsize(buffer, &width, &prev_line_height); lcd_getstringsize(buffer, &width, &prev_line_height);
snprintf(buffer, sizeof(buffer), "%s 20%02d %s %02d ", snprintf(buffer, sizeof(buffer), "%s %04d %s %02d ",
str(dayname[timedate[6]]), timedate[3], str(dayname[tm->tm_wday]), tm->tm_year+1900,
str(monthname[timedate[4] - 1]), timedate[5]); str(monthname[tm->tm_mon]), tm->tm_mday);
lcd_puts(0, 2, buffer); lcd_puts(0, 2, buffer);
/* recalculate the positions and offsets */ /* recalculate the positions and offsets */
lcd_getstringsize(buffer, &width, &line_height); lcd_getstringsize(buffer, &width, &line_height);
/* store these 2 to prevent _repeated_ strlen calls */ /* store these 2 to prevent _repeated_ strlen calls */
monthname_len = strlen(str(monthname[timedate[4] - 1])); monthname_len = strlen(str(monthname[tm->tm_mon]));
dayname_len = strlen(str(dayname[timedate[6]])); dayname_len = strlen(str(dayname[tm->tm_wday]));
/* weekday */ /* weekday */
strncpy(reffub, buffer, dayname_len); strncpy(reffub, buffer, dayname_len);
@ -2155,26 +2172,35 @@ bool set_time(char* string, int timedate[])
case 0: /* hour */ case 0: /* hour */
min = 0; min = 0;
steps = 24; steps = 24;
valptr = &tm->tm_hour;
break; break;
case 1: /* minute */ case 1: /* minute */
min = 0;
steps = 60;
valptr = &tm->tm_min;
break;
case 2: /* second */ case 2: /* second */
min = 0; min = 0;
steps = 60; steps = 60;
valptr = &tm->tm_sec;
break; break;
case 3: /* year */ case 3: /* year */
min = 0; min = 1;
steps = 100; steps = 200;
valptr = &tm->tm_year;
break; break;
case 4: /* month */ case 4: /* month */
min = 1; min = 0;
steps = 12; steps = 12;
valptr = &tm->tm_mon;
break; break;
case 5: /* day */ case 5: /* day */
min = 1; min = 1;
steps = daysinmonth[timedate[4] - 1]; steps = daysinmonth[tm->tm_mon];
valptr = &tm->tm_mday;
break; break;
} }
say_time(cursorpos, timedate); say_time(cursorpos, tm);
} }
button = button_get_w_tmo(HZ/2); button = button_get_w_tmo(HZ/2);
@ -2187,43 +2213,27 @@ bool set_time(char* string, int timedate[])
break; break;
case BUTTON_UP: case BUTTON_UP:
case BUTTON_UP | BUTTON_REPEAT: case BUTTON_UP | BUTTON_REPEAT:
timedate[cursorpos] = (timedate[cursorpos] + steps - min + 1) % *valptr = (*valptr + steps - min + 1) %
steps + min; steps + min;
if(timedate[cursorpos] == 0) if(*valptr == 0)
timedate[cursorpos] += min; *valptr = min;
say_time(cursorpos, timedate); say_time(cursorpos, tm);
break; break;
case BUTTON_DOWN: case BUTTON_DOWN:
case BUTTON_DOWN | BUTTON_REPEAT: case BUTTON_DOWN | BUTTON_REPEAT:
timedate[cursorpos]=(timedate[cursorpos]+steps - min - 1) % *valptr = (*valptr + steps - min - 1) %
steps + min; steps + min;
if(timedate[cursorpos] == 0) if(*valptr == 0)
timedate[cursorpos] += min; *valptr = min;
say_time(cursorpos, timedate); say_time(cursorpos, tm);
break; break;
case BUTTON_ON: case BUTTON_ON:
done = true; done = true;
if (timedate[6] == 0) /* rtc needs 1 .. 7 */
timedate[6] = 7;
break; break;
case BUTTON_OFF: case BUTTON_OFF:
done = true; done = true;
timedate[0] = -1; tm->tm_year = -1;
break; break;
#ifdef HAVE_RECORDER_KEYPAD
case BUTTON_F3:
#ifdef HAVE_LCD_BITMAP
global_settings.statusbar = !global_settings.statusbar;
settings_save();
if(global_settings.statusbar)
lcd_setmargins(0, STATUSBAR_HEIGHT);
else
lcd_setmargins(0, 0);
lcd_clear_display();
lcd_puts_scroll(0, 0, string);
#endif
break;
#endif
case SYS_USB_CONNECTED: case SYS_USB_CONNECTED:
usb_screen(); usb_screen();

3
apps/settings.h
View file

@ -23,6 +23,7 @@
#include <stdbool.h> #include <stdbool.h>
#include "config.h" #include "config.h"
#include "file.h" #include "file.h"
#include "timefuncs.h"
#define ROCKBOX_DIR "/.rockbox" #define ROCKBOX_DIR "/.rockbox"
#define FONT_DIR "/fonts" #define FONT_DIR "/fonts"
@ -237,7 +238,7 @@ bool set_option(char* string, void* variable, enum optiontype type,
struct opt_items* options, int numoptions, void (*function)(int)); struct opt_items* options, int numoptions, void (*function)(int));
bool set_int(char* string, char* unit, int voice_unit, int* variable, bool set_int(char* string, char* unit, int voice_unit, int* variable,
void (*function)(int), int step, int min, int max ); void (*function)(int), int step, int min, int max );
bool set_time(char* string, int timedate[]); bool set_time_screen(char* string, struct tm *tm);
int read_line(int fd, char* buffer, int buffer_size); int read_line(int fd, char* buffer, int buffer_size);
void set_file(char* filename, char* setting, int maxlen); void set_file(char* filename, char* setting, int maxlen);

71
apps/settings_menu.c
View file

@ -21,6 +21,7 @@
#include <stdio.h> #include <stdio.h>
#include <stdbool.h> #include <stdbool.h>
#include <string.h>
#include "lcd.h" #include "lcd.h"
#include "menu.h" #include "menu.h"
@ -41,6 +42,7 @@
#include "tree.h" #include "tree.h"
#include "screens.h" #include "screens.h"
#include "talk.h" #include "talk.h"
#include "timefuncs.h"
#ifdef HAVE_LCD_BITMAP #ifdef HAVE_LCD_BITMAP
#include "peakmeter.h" #include "peakmeter.h"
#endif #endif
@ -685,7 +687,8 @@ static bool trickle_charge(void)
#ifdef HAVE_RTC #ifdef HAVE_RTC
static bool timedate_set(void) static bool timedate_set(void)
{ {
int timedate[7]; /* hour,minute,second,year,month,day,dayofweek */ struct tm tm;
int timedate[8];
bool result; bool result;
timedate[0] = rtc_read(0x03); /* hour */ timedate[0] = rtc_read(0x03); /* hour */
@ -695,67 +698,27 @@ static bool timedate_set(void)
timedate[4] = rtc_read(0x06); /* month */ timedate[4] = rtc_read(0x06); /* month */
timedate[5] = rtc_read(0x05); /* day */ timedate[5] = rtc_read(0x05); /* day */
/* day of week not read, calculated in set_time() */ /* Make a local copy of the time struct */
/* hour */ memcpy(&tm, get_time(), sizeof(struct tm));
timedate[0] = ((timedate[0] & 0x30) >> 4) * 10 + (timedate[0] & 0x0f);
/* minute */
timedate[1] = ((timedate[1] & 0x70) >> 4) * 10 + (timedate[1] & 0x0f);
/* second */
timedate[2] = ((timedate[2] & 0x70) >> 4) * 10 + (timedate[2] & 0x0f);
/* year */
timedate[3] = ((timedate[3] & 0xf0) >> 4) * 10 + (timedate[3] & 0x0f);
/* month */
timedate[4] = ((timedate[4] & 0x10) >> 4) * 10 + (timedate[4] & 0x0f);
/* day */
timedate[5] = ((timedate[5] & 0x30) >> 4) * 10 + (timedate[5] & 0x0f);
/* do some range checks */ /* do some range checks */
/* This prevents problems with time/date setting after a power loss */ /* This prevents problems with time/date setting after a power loss */
if (timedate[0] < 0 || timedate[0] > 23 || if (!valid_time(&tm))
timedate[1] < 0 || timedate[1] > 59 ||
timedate[2] < 0 || timedate[2] > 59 ||
timedate[3] < 0 || timedate[3] > 99 ||
timedate[4] < 1 || timedate[4] > 12 ||
timedate[5] < 1 || timedate[5] > 31)
{ {
/* hour */ /* hour */
timedate[0] = 0; tm.tm_hour = 0;
/* minute */ tm.tm_min = 0;
timedate[1] = 0; tm.tm_sec = 0;
/* second */ tm.tm_mday = 1;
timedate[2] = 0; tm.tm_mon = 0;
/* year */ tm.tm_wday = 1;
timedate[3] = 3; tm.tm_year = 100;
/* month */
timedate[4] = 1;
/* day */
timedate[5] = 1;
} }
result = set_time(str(LANG_TIME),timedate); result = set_time_screen(str(LANG_TIME), &tm);
if(timedate[0] != -1) { if(tm.tm_year != -1) {
/* hour */ set_time(&tm);
timedate[0] = ((timedate[0]/10) << 4 | timedate[0]%10) & 0x3f;
/* minute */
timedate[1] = ((timedate[1]/10) << 4 | timedate[1]%10) & 0x7f;
/* second */
timedate[2] = ((timedate[2]/10) << 4 | timedate[2]%10) & 0x7f;
/* year */
timedate[3] = ((timedate[3]/10) << 4 | timedate[3]%10) & 0xff;
/* month */
timedate[4] = ((timedate[4]/10) << 4 | timedate[4]%10) & 0x1f;
/* day */
timedate[5] = ((timedate[5]/10) << 4 | timedate[5]%10) & 0x3f;
rtc_write(0x03, timedate[0] | (rtc_read(0x03) & 0xc0)); /* hour */
rtc_write(0x02, timedate[1] | (rtc_read(0x02) & 0x80)); /* minute */
rtc_write(0x01, timedate[2] | (rtc_read(0x01) & 0x80)); /* second */
rtc_write(0x07, timedate[3]); /* year */
rtc_write(0x06, timedate[4] | (rtc_read(0x06) & 0xe0)); /* month */
rtc_write(0x05, timedate[5] | (rtc_read(0x05) & 0xc0)); /* day */
rtc_write(0x04, timedate[6] | (rtc_read(0x04) & 0xf8)); /* dayofweek */
rtc_write(0x00, 0x00); /* 0.1 + 0.01 seconds */
} }
return result; return result;
} }

60
firmware/common/timefuncs.c
View file

@ -23,10 +23,28 @@
#include "timefuncs.h" #include "timefuncs.h"
#include "debug.h" #include "debug.h"
#ifndef SIMULATOR
static struct tm tm; static struct tm tm;
#endif
bool valid_time(struct tm *tm)
{
if (tm->tm_hour < 0 || tm->tm_hour > 23 ||
tm->tm_sec < 0 || tm->tm_sec > 59 ||
tm->tm_min < 0 || tm->tm_min > 59 ||
tm->tm_year < 100 || tm->tm_year > 199 ||
tm->tm_mon < 0 || tm->tm_mon > 11 ||
tm->tm_wday < 1 || tm->tm_wday > 7 ||
tm->tm_mday < 1 || tm->tm_mday > 31)
return false;
else
return true;
}
struct tm *get_time(void) struct tm *get_time(void)
{ {
#ifndef SIMULATOR
#ifdef HAVE_RTC #ifdef HAVE_RTC
char rtcbuf[8]; char rtcbuf[8];
@ -41,6 +59,8 @@ struct tm *get_time(void)
tm.tm_mon = ((rtcbuf[6] & 0x10) >> 4) * 10 + (rtcbuf[6] & 0x0f) - 1; tm.tm_mon = ((rtcbuf[6] & 0x10) >> 4) * 10 + (rtcbuf[6] & 0x0f) - 1;
tm.tm_year = ((rtcbuf[7] & 0xf0) >> 4) * 10 + (rtcbuf[7] & 0x0f) + 100; tm.tm_year = ((rtcbuf[7] & 0xf0) >> 4) * 10 + (rtcbuf[7] & 0x0f) + 100;
tm.tm_wday = rtcbuf[4] & 0x07; tm.tm_wday = rtcbuf[4] & 0x07;
if(tm.tm_wday == 7)
tm.tm_wday = 0;
tm.tm_yday = 0; /* Not implemented for now */ tm.tm_yday = 0; /* Not implemented for now */
tm.tm_isdst = -1; /* Not implemented for now */ tm.tm_isdst = -1; /* Not implemented for now */
#else #else
@ -55,4 +75,44 @@ struct tm *get_time(void)
tm.tm_isdst = -1; /* Not implemented for now */ tm.tm_isdst = -1; /* Not implemented for now */
#endif #endif
return &tm; return &tm;
#else
time_t now = time(NULL);
return localtime(&now);
#endif
}
int set_time(struct tm *tm)
{
#ifdef HAVE_RTC
int rc;
int tmp;
if (valid_time(tm))
{
rc = rtc_write(1, ((tm->tm_sec/10) << 4) | (tm->tm_sec%10));
rc |= rtc_write(2, ((tm->tm_min/10) << 4) | (tm->tm_min%10));
rc |= rtc_write(3, ((tm->tm_hour/10) << 4) | (tm->tm_hour%10));
tmp = tm->tm_wday;
if(tmp == 0)
tmp = 7;
rc |= rtc_write(4, tmp);
rc |= rtc_write(5, ((tm->tm_mday/10) << 4) | (tm->tm_mday%10));
rc |= rtc_write(6, (((tm->tm_mon+1)/10) << 4) | ((tm->tm_mon+1)%10));
rc |= rtc_write(7, (((tm->tm_year-100)/10) << 4) | ((tm->tm_year-100)%10));
rc |= rtc_write(8, 0x80); /* Out=1, calibration = 0 */
if(rc)
return -1;
else
return 0;
}
else
{
return -2;
}
#else
(void)tm;
return 0;
#endif
} }

21
firmware/include/timefuncs.h
View file

@ -21,24 +21,11 @@
#define _TIMEFUNCS_H_ #define _TIMEFUNCS_H_
#include "config.h" #include "config.h"
#include <stdbool.h>
#ifndef SIMULATOR #include "time.h"
struct tm
{
int tm_sec; /* seconds */
int tm_min; /* minutes */
int tm_hour; /* hours */
int tm_mday; /* day of the month */
int tm_mon; /* month */
int tm_year; /* year since 1900 */
int tm_wday; /* day of the week */
int tm_yday; /* day in the year */
int tm_isdst; /* daylight saving time */
};
#endif
struct tm *get_time(void); struct tm *get_time(void);
int set_time(struct tm *tm);
bool valid_time(struct tm *tm);
#endif /* _TIMEFUNCS_H_ */ #endif /* _TIMEFUNCS_H_ */

9
uisimulator/common/stubs.c
View file

@ -124,13 +124,6 @@ void backlight_set_on_when_charging(bool beep)
(void)beep; (void)beep;
} }
/* original is in firmware/common/timefuncs.c */
struct tm *get_time(void)
{
time_t now = time(NULL);
return localtime(&now);
}
int rtc_read(int address) int rtc_read(int address)
{ {
time_t now = time(NULL); time_t now = time(NULL);
@ -161,7 +154,7 @@ int rtc_read(int address)
int rtc_write(int address, int value) int rtc_write(int address, int value)
{ {
DEBUGF("write %x to address %x\n", value, address); DEBUGF("write %02x to address %02x\n", value, address);
return 0; return 0;
} }

6
uisimulator/win32/Makefile
View file

@ -97,7 +97,8 @@ else
LCDSRSC = lcd-playersim.c lcd-player.c lcd-player-charset.c font-player.c LCDSRSC = lcd-playersim.c lcd-player.c lcd-player-charset.c font-player.c
endif endif
FIRMSRCS = $(LCDSRSC) id3.c mp3data.c usb.c mpeg.c mp3_playback.c \ FIRMSRCS = $(LCDSRSC) id3.c mp3data.c usb.c mpeg.c mp3_playback.c \
powermgmt.c power.c sprintf.c buffer.c lcd-common.c strtok.c random.c powermgmt.c power.c sprintf.c buffer.c lcd-common.c strtok.c random.c \
timefuncs.c
APPS = main.c tree.c menu.c credits.c main_menu.c icons.c language.c \ APPS = main.c tree.c menu.c credits.c main_menu.c icons.c language.c \
playlist.c wps.c wps-display.c settings.c status.c \ playlist.c wps.c wps-display.c settings.c status.c \
@ -284,6 +285,9 @@ $(OBJDIR)/sprintf.o: $(COMMON)/sprintf.c
$(OBJDIR)/strtok.o: $(COMMON)/strtok.c $(OBJDIR)/strtok.o: $(COMMON)/strtok.c
$(CC) $(CFLAGS) -c $< -o $@ $(CC) $(CFLAGS) -c $< -o $@
$(OBJDIR)/timefuncs.o: $(COMMON)/timefuncs.c
$(CC) $(CFLAGS) -c $< -o $@
$(OBJDIR)/stubs.o: $(SIMCOMMON)/stubs.c $(OBJDIR)/stubs.o: $(SIMCOMMON)/stubs.c
$(CC) $(CFLAGS) -c $< -o $@ $(CC) $(CFLAGS) -c $< -o $@

3
uisimulator/win32/timefuncs.h
View file

@ -1,4 +1,7 @@
#include <time.h> #include <time.h>
#include <stdbool.h>
/* struct tm defined */ /* struct tm defined */
struct tm *get_time(void); struct tm *get_time(void);
int set_time(struct tm *tm);
bool valid_time(struct tm *tm);

5
uisimulator/x11/Makefile
View file

@ -97,7 +97,7 @@ else
LCDSRSC = lcd-playersim.c lcd-player.c font-player.c lcd-player-charset.c LCDSRSC = lcd-playersim.c lcd-player.c font-player.c lcd-player-charset.c
endif endif
FIRMSRCS = $(LCDSRSC) id3.c debug.c usb.c mpeg.c mp3_playback.c power.c\ FIRMSRCS = $(LCDSRSC) id3.c debug.c usb.c mpeg.c mp3_playback.c power.c\
powermgmt.c panic.c mp3data.c sprintf.c buffer.c powermgmt.c panic.c mp3data.c sprintf.c buffer.c timefuncs.c
APPS = main.c tree.c menu.c credits.c main_menu.c language.c\ APPS = main.c tree.c menu.c credits.c main_menu.c language.c\
playlist.c wps.c wps-display.c settings.c status.c icons.c\ playlist.c wps.c wps-display.c settings.c status.c icons.c\
@ -264,6 +264,9 @@ $(OBJDIR)/buffer.o: $(FIRMWAREDIR)/buffer.c
$(OBJDIR)/ctype.o: $(COMMON)/ctype.c $(OBJDIR)/ctype.o: $(COMMON)/ctype.c
$(CC) $(CFLAGS) $(APPINCLUDES) -c $< -o $@ $(CC) $(CFLAGS) $(APPINCLUDES) -c $< -o $@
$(OBJDIR)/timefuncs.o: $(COMMON)/timefuncs.c
$(CC) $(CFLAGS) $(APPINCLUDES) -c $< -o $@
$(OBJDIR)/stubs.o: $(SIMCOMMON)/stubs.c $(OBJDIR)/stubs.o: $(SIMCOMMON)/stubs.c
$(CC) $(APPCFLAGS) -c $< -o $@ $(CC) $(APPCFLAGS) -c $< -o $@

3
uisimulator/x11/timefuncs.h
View file

@ -1,4 +1,7 @@
#include <time.h> #include <time.h>
#include <stdbool.h>
/* struct tm defined */ /* struct tm defined */
struct tm *get_time(void); struct tm *get_time(void);
int set_time(struct tm *tm);
bool valid_time(struct tm *tm);