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* Avoid using angle brackets for PROJ headers.
Switching from #include <proj.h> to #include "proj.h",
and correspondingly for projects.h and proj_api.h,
reduces the risk of accidentally picking up a system
installed older version of the header while building
a new version of PROJ.
* Also handle geodesic.h
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Some macros seemed to be leftover from earlier code, so I removed them.
Others seemed like they should have been used, but weren't.
There should be no functional change, except the following: in floating-
point arithmetic, x / y is not the same as x * (1.0 / y). It can be
argued that using the multiplication is significantly faster, and the
algorithm is approximative anyway. Otherwise, the constants are
obviously not required.
Also fixes one location in PJ_aitoff.c, where an enumeration value
should have been used.
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Having non-const variables of static lifetime or even global scope is
usually a bad idea. These variables are inherently constants, and this
should be enforced.
This required marking some functions as not modifying input parameters
and marking some pointers as pointers to const.
One advantage is that the compiler usually puts const static variables
in a read-only code segment, so they can't be modified physically.
This can be verified with `nm` (on POSIX systems).
To avoid changes to the public API, functions returning non-const
pointers to data tables were left intact, but the returned data may not
be modified. Internally we prefer using the proj_list_* functions over
the pj_get_*_ref functions, because the former return const pointers.
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The upper-case macro `VAR` casts the lower-case variable `var` to an
expected type, but that usage obfuscates the variables to the casual
reader. This is especially prevalent in the allocation function in which
`var` is the correct type already, so both `var` and `VAR` are valid
*and* in use.
In any case, for those functions that don't obtain `var` in the correct
type from their parameters, it's much simpler to just case once at the
beginning.
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git-svn-id: http://svn.osgeo.org/metacrs/proj/trunk@1856 4e78687f-474d-0410-85f9-8d5e500ac6b2
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git-svn-id: http://svn.osgeo.org/metacrs/proj/trunk@1504 4e78687f-474d-0410-85f9-8d5e500ac6b2
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git-svn-id: http://svn.osgeo.org/metacrs/proj/trunk@1363 4e78687f-474d-0410-85f9-8d5e500ac6b2
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