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C API: add FOLK_ERROR, etc macros #155

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Jun 15, 2024
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C API: add FOLK_ERROR, etc macros #155

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6 changes: 6 additions & 0 deletions lib/c.tcl
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Original file line number Diff line number Diff line change
Expand Up @@ -51,9 +51,14 @@ namespace eval c {
#include <setjmp.h>

jmp_buf __onError;
Tcl_Interp* __interp;

#define __ENSURE(EXPR) if (!(EXPR)) { Tcl_SetResult(interp, "failed to convert argument from Tcl to C in: " #EXPR, NULL); longjmp(__onError, 0); }
#define __ENSURE_OK(EXPR) if ((EXPR) != TCL_OK) { longjmp(__onError, 0); }

#define FOLK_ERROR(MSG) do { Tcl_SetResult(__interp, MSG, NULL); longjmp(__onError, 0); } while (0)
#define FOLK_ENSURE(EXPR) if (!(EXPR)) { Tcl_SetResult(__interp, "assertion failed: " #EXPR, NULL); longjmp(__onError, 0); }
#define FOLK_CHECK(EXPR, MSG) if (!(EXPR)) { FOLK_ERROR(MSG); }
}
variable code [list]
variable objtypes [list]
Expand Down Expand Up @@ -438,6 +443,7 @@ namespace eval c {
Tcl_SetResult(interp, "Wrong number of arguments to $name", NULL);
return TCL_ERROR;
}
__interp = interp;
int r = setjmp(__onError);
if (r != 0) { return TCL_ERROR; }

Expand Down