C Interface

The C interface is provided through a set of functions defined in the cmsg.h header file. These functions are implemented using the C interoperability capabilities in Fortram 2003/2008/2018, and are based around a pair of void * typedefs — SpecGrid and PhotGrid — that store pointers to corresponding Fortran specgrid_t and photgrid_t objects.

API Specification

• Typedefs
• Functions
  • SpecGrid Functions
  • PhotGrid Functions
• Enums

Compiling/Linking

Headers for the C interface are provided in the header file $MSG_DIR/include/cmsg.h, and executables should be linked against $MSG_DIR/lib/libcmsg.so (Linux) or $MSG_DIR/lib/libcmsg.dylib (MacOS). To simplify this process, a script $MSG_DIR/scripts/cmsg_link is provided that writes the appropriate linker commands to standard output. This script can be used to compile/link a program with gcc as follows:

gcc -I $MSG_DIR/include -o myprogram myprogram.c `$MSG_DIR/scripts/cmsg_link`