Data Interfaces

CPI-C SAP-specific Functions
SAP_CMINIT() Specifies SAP gateway (active program)
SAP_CMACCP() Specifies SAP gateway (passive program)
SAP_CMLOGON() Connect string for logon to R/2 or R/3
SAP_CMCERR() Error handling
SAP_CMPERR()
SAP_CMLOADCONVTAB() Data conversion
SAP_CMMODCONVTAB()
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SAP-specific CPI-C functions are partly required for communication with SAP R/2 or R/3. Optional
SAP-specific CPI-C functions simplify the development of remote CPI-C programs.
SAP_CMINIT (optional) and SAP_CMACCP(required in a passive program) inform the program
which gateway handler is being used (gateway host, gateway service, protocol type), but these details are
generally available in the relevant side information. SAP_CMINIT only makes sense before a CMINIT.
Accordingly, the partner program must then contain a SAP_CMACCP before the CMACCP in order to
receive the communication parameters.
SAP_CMLOGON (optional) creates the connect string necessary for logging on to an R/2 or R/3
System.
SAP_CMCERR (optional) checks whether the data received by the R/2 or R/3 System is an error
message.
In the case of an error, SAP_CMPERR (optional) returns a short explanation of the error.
You can use SAP_CMLOADCONVTAB (optional) to load a special conversion table.
SAP_CMMODCONVTAB (optional) modifies an area of the current conversion table.