C API: Add automatic curve conversion (WIP)

Author: dbaston

capi/geos_c.h.in

@@ -509,6 +509,38 @@ extern GEOSMessageHandler_r GEOS_DLL GEOSContext_setErrorMessageHandler_r(
     GEOSMessageHandler_r ef,
     void *userData);
 
+/**
+* Set parameters to use for converting input curves to lines.
+*
+* These parameters will be used with this context whenever a curved geometry is
+* provided to a function that only supports linear types. If `params` is NULL,
+* no automatic conversion will be performed.
+*
+* \param extHandle the GEOS context
+* \param params the curve conversion parameters
+*
+* \since 3.15
+*/
+extern void GEOS_DLL GEOSContext_setCurveToLineParams_r(
+    GEOSContextHandle_t extHandle,
+    const GEOSCurveToLineParams* params);
+
+/**
+* Set parameters to use for converting output lines to curves.
+*
+* These parameters will be used with this context whenever a curved geometry is
+* provided to a function that only supports linear types. If `params` is NULL,
+* no automatic conversion will be performed.
+*
+* \param extHandle the GEOS context
+* \param params the curve conversion parameters
+*
+* \since 3.15
+*/
+extern void GEOS_DLL GEOSContext_setLineToCurveParams_r(
+    GEOSContextHandle_t extHandle,
+    const GEOSLineToCurveParams* params);
+
 /* ========== Coordinate Sequence functions ========== */
 
 /** \see GEOSCoordSeq_create */