PROJ/src/projections/vandg.cpp, branch backport-2856-to-master

Revise error codes to have a reduced set exposed in the public API.

2020-12-15T00:13:43+00:00

Fixes #2482

And also add proj_context_errno_string()

Revise gie 'expect failure errno XXXX' strings

Add comments to vandg.cpp to tie implementation to Snyder (1987).

2020-02-08T19:33:06+00:00

Fix numerical precision issues in vandg and robin

2020-02-07T10:08:43+00:00

Refs #1906
Fix remaining issues of https://github.com/OSGeo/PROJ/issues/1906#issuecomment-583168348
as found with gcc 8.2.0 -m32 -O2

Prefix inverse and forward functions by their projection names

2019-04-26T16:18:30+00:00

This is mostly to have better OSSFuzz report. Currently a lot
of bug summaries are like
`proj4/standard_fuzzer: Divide-by-zero in s_inverse`

By prefixing the projection name, we will get better reports, like
`Divide-by-zero in airy_s_inverse`

This also makes it slightly easier to set a breakpoint by
function name.

vandg inverse: avoid division by zero

2019-03-24T16:11:55+00:00

Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=13894
Credit to OSS Fuzz

Merge projects.h into proj_internal.h

2018-12-30T20:48:56+00:00

projects.h: remove deprecated XY, XYZ, LP, LPZ, UV, UVW, projUV and projUVW structures

2018-12-30T20:48:56+00:00

cpp conversion: remove useless pj_, PJ_ and proj_ filename prefixes

2018-12-26T09:08:55+00:00