Simplify

Signed-off-by: Mattias Andrée <maandree@kth.se>

7 files changed, 0 insertions, 401 deletions

diff --git a/man/libred.7 b/man/libred.7
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-.TH LIBRED 7 LIBRED
-.SH NAME
-libred \- Solar elevation and blackbody colour calculation
-.SH DESCRIPTION
-.B libred
-is a C library for calculating the Sun's apparent elevation
-and colours temperatures.
-.SH "FUTURE DIRECTIONS"
-None.
-.SH "SEE ALSO"
-.BR libred.h (0),
-.BR solar-python (7),
-.BR redshift (1),
-.BR blueshift (1),
-.BR libgamma (7)
diff --git a/man/libred.h.0 b/man/libred.h.0
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--- a/man/libred.h.0
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-.\" -*- nroff -*-
-.TH LIBRED.H 0 LIBRED "" "Library Headers"
-.SH NAME
-libred.h \- Solar elevation and blackbody colour calculation
-.SH SYNOPSIS
-.nf
-#include <libred.h>
-.fi
-.PP
-Link with
-.IR -lred .
-.SH DESCRIPTION
-The
-.I <libred.h>
-header defines macros, symbolic constants, and functions for
-calculating solar elevations and blackbody colours. All macros
-and symbolic constants in this header are suitable for use in
-.B #if
-preprocessing directives.
-.PP
-This header defines the follow symbolic constants:
-.TP
-.B LIBRED_SOLAR_APPARENT_RADIUS
-The approximate apparent size of the Sun in degrees. This
-value should be about 0.5(3).
-.TP
-.B LIBRED_SOLAR_ELEVATION_SUNSET_SUNRISE
-The Sun's elevation at sunset and sunrise, measured in degrees.
-This value will always be 0.0.
-.TP
-.B LIBRED_SOLAR_ELEVATION_CIVIL_DUSK_DAWN
-The Sun's elevation at civil dusk and civil dawn, measured in
-degrees. This value will always be -6.0.
-.TP
-.B LIBRED_SOLAR_ELEVATION_NAUTICAL_DUSK_DAWN
-The Sun's elevation at nautical dusk and nautical dawn, measured
-in degrees. This value will always be -12.0.
-.TP
-.B LIBRED_SOLAR_ELEVATION_ASTRONOMICAL_DUSK_DAWN
-The Sun's elevation at astronomical dusk and astronomical dawn,
-measured in degrees. This value will always be -18.0.
-.TP
-.B LIBRED_HIGHEST_TEMPERATURE
-The highest temperature, in kelvins, for which there is a colour
-temperature in the table of colour temperature. Any temperature
-above this is automatically truncated by
-.BR libred_get_colour (3),
-as higher values shall be unnoticeable. Currently, this value
-is 40\ 000.
-.TP
-.B LIBRED_LOWEST_TEMPERATURE
-The lowest temperature, in kelvins, for which there is a colour
-temperature in the table of colour temperature. Any temperature
-below this results in
-.BR libred_get_colour (3)
-failing and setting
-.B errno
-to
-.BR EDOM .
-Currently this value 1000, hypothetical changes will be very small.
-.TP
-.B LIBRED_DELTA_TEMPERATURE
-The temperatures differences between sequential colour temperatures
-in the colour temperatures look up table. Currently this value is 100.
-.PP
-This header defines the follow macros:
-.TP
-.BR LIBRED_IS_TWILIGHT "(const double)"
-Evaluates to 1 if the given expression is between -18.0 and 0.0 (this is,
-between
-.B LIBRED_SOLAR_ELEVATION_ASTRONOMICAL_DUSK_DAWN
-and
-.BR LIBRED_SOLAR_ELEVATION_SUNSET_SUNRISE ),
-inclusively, otherwise, this macro evaluates to 0. The input should be the
-Sun's apparent elevation, and the macro evaluates to 1 if it is currently
-twilight. The given expression is evaluted either once or twice, therefore,
-it must not have side-effects.
-.TP
-.BR LIBRED_IS_CIVIL_TWILIGHT "(const double)"
-Evaluates to 1 if the given expression is between -6.0 and 0.0 (this is,
-between
-.B LIBRED_SOLAR_ELEVATION_CIVIL_DUSK_DAWN
-and
-.BR LIBRED_SOLAR_ELEVATION_SUNSET_SUNRISE ),
-inclusively, otherwise, this macro evaluates to 0. The input should be the
-Sun's apparent elevation, and the macro evaluates to 1 if it is currently
-civil twilight. The given expression is evaluted either once or twice,
-therefore, it must not have side-effects.
-.TP
-.BR LIBRED_IS_NAUTICAL_TWILIGHT "(const double)"
-Evaluates to 1 if the given expression is between -12.0 and -6.0 (this is,
-between
-.B LIBRED_SOLAR_ELEVATION_NAUTICAL_DUSK_DAWN
-and
-.BR LIBRED_SOLAR_ELEVATION_CIVIL_DUSK_DAWN ),
-inclusively, otherwise, this macro evaluates to 0. The input should be the
-Sun's apparent elevation, and the macro evaluates to 1 if it is currently
-nautical twilight. The given expression is evaluted either once or twice,
-therefore, it must not have side-effects.
-.TP
-.BR LIBRED_IS_ASTRONOMICAL_TWILIGHT "(const double)"
-Evaluates to 1 if the given expression is between -18.0 and -12.0 (this is,
-between
-.B LIBRED_SOLAR_ELEVATION_ASTRONOMICAL_DUSK_DAWN
-and
-.BR LIBRED_SOLAR_ELEVATION_NAUTICAL_DUSK_DAWN ),
-inclusively, otherwise, this macro evaluates to 0. The input should be the
-Sun's apparent elevation, and the macro evaluates to 1 if it is currently
-astronomical twilight. The given expression is evaluted either once or twice,
-therefore, it must not have side-effects.
-.PP
-Note that the intervals are closed, and hence their boundaries overlap.
-This is intentional. If it is not twilight it is either daytime or night.
-It is night only if the Sun's apparent elevation is negative.
-.PP
-This header defines the following functions:
-.TP
-*
-.BR libred_solar_elevation (3)
-.TP
-*
-.BR libred_check_timetravel (3)
-.TP
-*
-.BR libred_init_colour (3)
-.TP
-*
-.BR libred_term_colour (3)
-.TP
-*
-.BR libred_get_colour (3)
-.PP
-This header may define
-.B extern int libred_fd
-iff it does it also defines the macro
-.BR LIBRED_HAVE_FD .
-If it does, you want to keep this file descriptor open when you daemonise
-your process. It is set by
-.BR libred_init_colour (3)
-and unset by
-.BR libred_term_colour (3).
-It value is negative (more precisely it is -1) if no file descriptor has
-been opened.
-.SH "FUTURE DIRECTIONS"
-None.
-.SH "SEE ALSO"
-.BR libred (7),
-.BR libred_solar_elevation (3),
-.BR libred_check_timetravel (3),
-.BR libred_init_colour (3),
-.BR libred_term_colour (3),
-.BR libred_get_colour (3)
diff --git a/man/libred_check_timetravel.3 b/man/libred_check_timetravel.3
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-.TH LIBRED_CHECK_TIMETRAVEL 3 LIBRED
-.SH NAME
-libred_check_timetravel \- Exit the process if the clock is too far in the past
-.SH SYNOPSIS
-.nf
-#include <libred.h>
-
-int \fBlibred_check_timetravel\fP(void);
-.fi
-.PP
-Link with
-.IR -lred .
-.SH DESCRIPTION
-.B libred_check_timetravel
-exits the process if
-.B libred
-is not compiled to support the current time, which is the case
-if it was compiled without
-.I \-DTIMETRAVELLER
-and the clock is before year 2000.5 in the Julian calendar. Before
-exiting, the function will print an informative error message to
-standard error.
-.SH "RETURN VALUE"
-Upon successful completion, without time incompatibility, the function
-returns 0. Upon failure, that is, it is unable to read the clock, the
-function returns -1.
-.SH ERRORS
-The function may fail for any reason specified for
-.BR clock_gettime (3),
-and set the value of
-.B errno
-to the same values.
-.SH "FUTURE DIRECTIONS"
-None.
-.SH "SEE ALSO"
-.BR libred.h (0),
-.BR libred (7),
-.BR libred_solar_elevation (3)
diff --git a/man/libred_get_colour.3 b/man/libred_get_colour.3
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--- a/man/libred_get_colour.3
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@@ -1,74 +0,0 @@
-.TH LIBRED_GET_COLOUR 3 LIBRED
-.SH NAME
-libred_get_colour \- Calculate a colour temperature
-.SH SYNOPSIS
-.nf
-#include <libred.h>
-
-int \fBlibred_get_colour\fP(long int \fItemp\fP, double* \fIr\fP, double* \fIg\fP, double* \fIb\fP);
-.fi
-.PP
-Link with
-.IR -lred .
-.SH DESCRIPTION
-.B libred_get_colour
-gets or interpolates the colour temperature for
-.I temp
-kelvins, and returns the colour temperature in sRGB. The values,
-between 0.0 and 1.0, for the "red", green, and blue channels
-are stored in
-.IR *r ,
-.IR *g ,
-and
-.IR *b ,
-respectively.
-.PP
-At least one of the values will be 1.0, none will be greater than
-1.0, and none will be less than 0.0. It is guaranteed (unless the
-resources file has been modified) that
-.IR *r ,
-.IR *g ,
-and
-.I *b
-all will be 1.0 if
-.I temp
-is 6500.
-.PP
-You must call
-.BR libred_init_colour (3)
-before the first use of this function,
-and you should call
-.BR libred_term_colour (3)
-after the last use of this function.
-.SH "RETURN VALUE"
-Upon successful completion, the function returns 0. On failure,
-the function returns -1 and sets
-.B errno
-appropriately.
-.SH ERRORS
-The function may fail if:
-.TP
-.B EOVERFLOW
-The colour temperature lookup table is smaller than it should be.
-.TP
-.B EDOM
-If
-.I temp
-is less than
-.B LIBRED_LOWEST_TEMPERATURE
-(which is 1000.)
-.PP
-The function may also fail for any reason specified for
-.BR pread (3),
-and set the value of
-.B errno
-to the same values.
-.SH "FUTURE DIRECTIONS"
-It is possible that the behaviour is changed to loading the
-colour temperature lookup table rather than just open a
-file descriptor to it.
-.SH "SEE ALSO"
-.BR libred.h (0),
-.BR libred (7),
-.BR libred_init_colour (3),
-.BR libred_term_colour (3)
diff --git a/man/libred_init_colour.3 b/man/libred_init_colour.3
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-.TH LIBRED_INIT_COLOUR 3 LIBRED
-.SH NAME
-libred_init_colour \- Prepare for use of libred_get_colour(3)
-.SH SYNOPSIS
-.nf
-#include <libred.h>
-
-int \fBlibred_init_colour\fP(void);
-.fi
-.PP
-Link with
-.IR -lred .
-.SH DESCRIPTION
-.B libred_init_colour
-open a file descriptor, without returning it, to the colour
-temperature lookup table, and stores the file descriptor to
-.BR libred_fd .
-It is necessary to call this function before the first call to
-.BR libred_get_colour (3).
-.SH "RETURN VALUE"
-Upon successful completion, the function returns 0. On failure,
-the function returns -1 and sets
-.B errno
-appropriately.
-.SH ERRORS
-The function may fail for any reason specified for
-.BR open (3),
-and set the value of
-.B errno
-to the same values.
-.B errno
-is always set to 0 on success.
-.SH "FUTURE DIRECTIONS"
-It is possible that the behaviour is changed to loading the
-colour temperature lookup table rather than just open a
-file descriptor to it.
-.SH "SEE ALSO"
-.BR libred.h (0),
-.BR libred (7),
-.BR libred_get_colour (3),
-.BR libred_term_colour (3)
diff --git a/man/libred_solar_elevation.3 b/man/libred_solar_elevation.3
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@@ -1,48 +0,0 @@
-.TH LIBRED_SOLAR_ELEVATION 3 LIBRED
-.SH NAME
-libred_solar_elevation \- Calculate the Sun's apparent elevation
-.SH SYNOPSIS
-.nf
-#include <libred.h>
-
-double \fBlibred_solar_elevation\fP(double \fIlatitude\fP, double \fIlongitude\fP);
-.fi
-.PP
-Link with
-.IR -lred .
-.SH DESCRIPTION
-.B libred_solar_elevation
-calculates the Sun's  elevation as apparent from a select geographical position.
-Namely from
-.I latitude
-degrees north of GPS's equator and
-.I longitude
-degrees east of GPS's prime meridian. The function is only explicitly defined for
-values between -90 and +90 for
-.I latitude
-and values between -180 and +180 for and
-.IR longitude .
-Other values may or may not work, no error is thrown if used.
-.SH "RETURN VALUE"
-Upon successful completion, the function sets
-.B errno
-to 0 and returns the Sun's current apparent elevation, measured in
-degrees above the horizon. On failure, the function returns an
-arbitrary value (happens to always be 0.0) and sets
-.B errno
-an a non-zero value.
-.SH ERRORS
-The function may fail for any reason specified for
-.BR clock_gettime (3),
-and set the value of
-.B errno
-to the same values.
-.B errno
-is always set to 0 on success.
-.SH "FUTURE DIRECTIONS"
-None.
-.SH "SEE ALSO"
-.BR libred.h (0),
-.BR libred (7),
-.BR libred_check_timetravel (3),
-.BR libred_init_colour (3)
diff --git a/man/libred_term_colour.3 b/man/libred_term_colour.3
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-.TH LIBRED_TERM_COLOUR 3 LIBRED
-.SH NAME
-libred_term_colour \- Deallocate resources required by libred_get_colour(3)
-.SH SYNOPSIS
-.nf
-#include <libred.h>
-
-void \fBlibred_term_colour\fP(void);
-.fi
-.PP
-Link with
-.IR -lred .
-.SH DESCRIPTION
-.B libred_term_colour
-deallocates all resources acquired by
-.BR libred_init_colour (3).
-It is highly recommended to call this function before calling an
-.BR exec (3)-function.
-If you want to use
-.BR libred_get_colour (3)
-again after a call to this function has been made, you must first call
-.BR libred_init_colour (3).
-.SH "RETURN VALUE"
-None.
-.SH ERRORS
-None.
-.SH "FUTURE DIRECTIONS"
-None.
-.SH "SEE ALSO"
-.BR libred.h (0),
-.BR libred (7),
-.BR libred_get_colour (3),
-.BR libred_init_colour (3)