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Fix error C2020: 'parms': 'struct' member redefinition #91

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Merged
andywolk merged 1 commit into from
Jul 30, 2026
Merged

Fix error C2020: 'parms': 'struct' member redefinition #91

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19 changes: 19 additions & 0 deletions src/spandsp/private/v150_1.h
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,20 @@
#if !defined(_SPANDSP_PRIVATE_V150_1_H_)
#define _SPANDSP_PRIVATE_V150_1_H_

#if defined(_WIN32)
/* <windows.h> (minwindef.h) defines the legacy 16 bit memory model keywords
"near" and "far" as empty macros. Left in place, they strip the names from
the near and far members of v150_1_state_s, making them anonymous structs.
MSVC then flattens their contents into the enclosing struct, where the two
"parms" members collide (error C2020: 'parms': 'struct' member
redefinition). Both macros are restored at the end of this header, so an
including application keeps whatever it had. */
#pragma push_macro("near")
#pragma push_macro("far")
#undef near
#undef far
#endif

/*
telephone network
^
Expand Down Expand Up @@ -361,5 +375,10 @@ struct v150_1_state_s
logging_state_t logging;
};

#if defined(_WIN32)
#pragma pop_macro("far")
#pragma pop_macro("near")
#endif

#endif
/*- End of file ------------------------------------------------------------*/
8 changes: 8 additions & 0 deletions src/v150_1.c
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Expand Up @@ -56,6 +56,14 @@

#include "v150_1_local.h"

#if defined(_WIN32)
/* See the note in spandsp/private/v150_1.h. The near and far members of
v150_1_state_t are referenced by name throughout this file, so the
<windows.h> macros of those names must not be in effect here. */
#undef near
#undef far
#endif

/* Terminology

V.150.1 has several components. The terms used for these are:
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