Schooner C Stub Compiler (schc)

The C stub compiler of Schooner translates specification files written using the procedure specification language of Universal Type System (UTS) into stub files that are compilable using a C compiler. The specification file must contain a specification for each procedure that a user wishes made available to other parts of the application (export) or intends to make a remote procedure call to (import). Import and export specifications have the following format:

import name prog ([types]) [returns (type)]
export name prog ([types]) [returns (type)]

UTS also provides the external data representation used in inter-procedure communication in Schooner. The mapping between the UTS data types and the C data types are shown in the three tables below. The first table contains the mapping in which the two agree, so that each has a direct counterpart in the other. The second contains mappings for C types that do not fall into the first category and the last contains mappings for UTS types that have no exact C equivalent. Note that some of the entries in the third section are marked as merely representations. This indicates that the C type listed is used only to store the data and that the UTS data should not be thought of as obeying the semantics of the C type. The dashes indicate UTS types that cannot be mapped directly into C; such types must be represented using the UTS libraries. 
        Two-Way Mappings
    C Type          UTS Type
    long            integer
    float           float
    double          double
    char            byte
    char *          string[n]
    struct          record
    X name[n]       array[n] of x
    Y name(X)       prog(x) returns (y)
    void name(X)    prog(x)