<title>cc65 function reference
<author><url url="mailto:uz@cc65.org" name="Ullrich von Bassewitz">,<newline>
<url url="mailto:greg.king5@verizon.net" name="Greg King">
-<date>2018-05-29
<abstract>
cc65 is a C compiler for 6502 based systems. This function reference describes
<item>_dos_type
<item><ref id="get_ostype" name="get_ostype">
<item>rebootafterexit
-<item>textframe
-<item>textframexy
<item><ref id="videomode" name="videomode">
</itemize>
<sect1><tt/cc65.h/<label id="cc65.h"><p>
<itemize>
-<!-- <item><ref id="cc65_cos" name="cc65_cos"> -->
-<!-- <item><ref id="cc65_idiv32by16r16" name="cc65_idiv32by16r16"> -->
-<!-- <item><ref id="cc65_imul16x16r32" name="cc65_imul16x16r32"> -->
-<!-- <item><ref id="cc65_imul8x8r16" name="cc65_imul8x8r16"> -->
-<!-- <item><ref id="cc65_sin" name="cc65_sin"> -->
-<!-- <item><ref id="cc65_udiv32by16r16" name="cc65_udiv32by16r16"> -->
-<!-- <item><ref id="cc65_umul16x16r32" name="cc65_umul16x16r32"> -->
-<!-- <item><ref id="cc65_umul16x8r32" name="cc65_umul16x8r32"> -->
-<!-- <item><ref id="cc65_umul8x8r16" name="cc65_umul8x8r16"> -->
+
+<!-- <item><ref id="cos" name="cos"> -->
+<!-- <item><ref id="idiv32by16r16" name="idiv32by16r16"> -->
+<!-- <item><ref id="imul16x16r32" name="imul16x16r32"> -->
+<!-- <item><ref id="imul8x8r16" name="imul8x8r16"> -->
+<!-- <item><ref id="sin" name="sin"> -->
+<!-- <item><ref id="udiv32by16r16" name="udiv32by16r16"> -->
+<!-- <item><ref id="umul16x16r32" name="umul16x16r32"> -->
+<!-- <item><ref id="umul16x8r32" name="umul16x8r32"> -->
+<!-- <item><ref id="umul8x8r16" name="umul8x8r16"> -->
<item><ref id="doesclrscrafterexit" name="doesclrscrafterexit">
+<item><ref id="mul20" name="mul20">
+<item><ref id="mul40" name="mul40">
</itemize>
(incomplete)
<item><ref id="signal" name="signal">
</itemize>
-
<sect1><tt/stdarg.h/<label id="stdarg.h"><p>
(incomplete)
<sect1><tt/time.h/<label id="time.h"><p>
<itemize>
-<!-- <item><ref id="_systime" name="_systime"> -->
<!-- <item><ref id="asctime" name="asctime"> -->
<item><ref id="clock" name="clock">
+<item><ref id="clock_getres" name="clock_getres">
+<item><ref id="clock_gettime" name="clock_gettime">
+<item><ref id="clock_settime" name="clock_settime">
<!-- <item><ref id="ctime" name="ctime"> -->
<!-- <item><ref id="gmtime" name="gmtime"> -->
<!-- <item><ref id="localtime" name="localtime"> -->
</descrip>
</quote>
-
<sect1>_poserror<label id="_poserror"><p>
<quote>
</quote>
+<sect1>clock_getres<label id="clock_getres"><p>
+
+<quote>
+<descrip>
+<tag/Function/Determine the realtime clock resolution.
+<tag/Header/<tt/<ref id="time.h" name="time.h">/
+<tag/Declaration/<tt/int __fastcall__ clock_getres (clockid_t clock_id, struct timespec *res);/
+<tag/Description/The <tt/clock_getres/ function finds the resolution (precision)
+of the realtime clock. <tt/clock_id/ has to be <tt/CLOCK_REALTIME/. If <tt/res/
+is not <tt/NULL/, the resolution of the realtime clock is stored in the location
+pointed to by <tt/res/. If <tt/res/ is <tt/NULL/, the clock resolution is not returned.
+If the <tt/tp/ argument of <tt/<ref id="clock_settime" name="clock_settime">/ is not
+a multiple of <tt/res/, then the value is truncated to a multiple of <tt/res/. On
+success, zero is returned. On error, -1 is returned and <tt/errno/ is set to an
+error code describing the reason for the failure.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+<item>Depending on the target either the <tt/tv_sec/ or the <tt/tv_nsec/
+field of the <tt/struct timespec/ returned is zero.
+</itemize>
+<tag/Availability/POSIX 1003.1
+<tag/See also/
+<ref id="clock_gettime" name="clock_gettime">,
+<ref id="clock_settime" name="clock_settime">
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>clock_gettime<label id="clock_gettime"><p>
+
+<quote>
+<descrip>
+<tag/Function/Get the time from the realtime clock.
+<tag/Header/<tt/<ref id="time.h" name="time.h">/
+<tag/Declaration/<tt/int __fastcall__ clock_gettime (clockid_t clock_id, struct timespec *tp);/
+<tag/Description/The <tt/clock_gettime/ function retrieves the time since the 1970-01-01 00:00:00
+measured in nanoseconds. <tt/clock_id/ has to be <tt/CLOCK_REALTIME/. On success, zero is
+returned. On error, -1 is returned and <tt/errno/ is set to an error code describing the
+reason for the failure.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+<item>Many platforms supported by cc65 do not have a realtime clock, so the
+retrieved value may not be valid. See also the platform-specific information.
+</itemize>
+<tag/Availability/POSIX 1003.1
+<tag/See also/
+<ref id="clock_getres" name="clock_getres">,
+<ref id="clock_settime" name="clock_settime">,
+<ref id="time" name="time">
+<tag/Example/None.
+</descrip>
+</quote>
+
+
+<sect1>clock_settime<label id="clock_settime"><p>
+
+<quote>
+<descrip>
+<tag/Function/Set the time on the realtime clock.
+<tag/Header/<tt/<ref id="time.h" name="time.h">/
+<tag/Declaration/<tt/int __fastcall__ clock_settime (clockid_t clock_id, const struct timespec *tp);/
+<tag/Description/The <tt/clock_settime/ function sets the time since the 1970-01-01 00:00:00
+measured in nanoseconds. <tt/clock_id/ has to be <tt/CLOCK_REALTIME/. On success, zero is
+returned. On error, -1 is returned and <tt/errno/ is set to an error code describing the
+reason for the failure.
+<tag/Notes/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+<item>Many platforms supported by cc65 do not have a realtime clock, so
+setting the time may not work. See also the platform-specific information.
+</itemize>
+<tag/Availability/POSIX 1003.1
+<tag/See also/
+<ref id="clock_getres" name="clock_getres">,
+<ref id="clock_gettime" name="clock_gettime">
+<tag/Example/None.
+</descrip>
+</quote>
+
+
<sect1>clrscr<label id="clrscr"><p>
<quote>
<descrip>
<tag/Function/Load and initialize an extended memory driver.
<tag/Header/<tt/<ref id="em.h" name="em.h">/
-<tag/Declaration/<tt/void __fastcall__ em_load_driver (const char* name);/
+<tag/Declaration/<tt/unsigned char __fastcall__ em_load_driver (const char* name);/
<tag/Description/Load an extended memory driver into memory and initialize
it. The function returns an error code that tells if all this has been
successful.
</descrip>
</quote>
+<sect1>mul20<label id="mul20"><p>
+
+<quote>
+<descrip>
+<tag/Function/Multiplies argument by 20.
+<tag/Header/<tt/<ref id="cc65.h" name="cc65.h">/
+<tag/Declaration/<tt/unsigned int __fastcall__ mul20 (unsigned char value);/
+<tag/Description/Speed optimized function to multiply an 8 bit unsigned value by 20 to get a 16 bit result.
+<tag/Availability/cc65
+</descrip>
+</quote>
+
+<sect1>mul40<label id="mul40"><p>
+
+<quote>
+<descrip>
+<tag/Function/Multiplies argument by 40.
+<tag/Header/<tt/<ref id="cc65.h" name="cc65.h">/
+<tag/Declaration/<tt/unsigned int __fastcall__ mul40 (unsigned char value);/
+<tag/Description/Speed optimized function to multiply an 8 bit unsigned value by 40 to get a 16 bit result.
+<tag/Availability/cc65
+</descrip>
+</quote>
<sect1>offsetof<label id="offsetof"><p>
<tag/Description/The function returns the time since the 1970-01-01 00:00:00
measured in seconds. If the pointer <tt/t/ is not <tt/NULL/, the function
result will also be stored there. If no time is available, <tt/(time_t)-1/ is
-returned and <tt/errno/ is set to <tt/ENOSYS/.
+returned and an error code is stored in <tt/errno/.
<tag/Notes/<itemize>
<item>The function is only available as fastcall function, so it may
only be used in presence of a prototype.
</itemize>
<tag/Availability/ISO 9899
<tag/See also/
-<ref id="clock" name="clock">
+<ref id="clock" name="clock">,
+<ref id="clock_gettime" name="clock_gettime">
<tag/Example/None.
</descrip>
</quote>
projects / cc65 / blobdiff