|
9.3.4 `sic.c' & `sic.h'
Since the application binary has no installed header files, there is
little point in maintaining a corresponding header file for every
source, all of the structures shared by these files, and non-static
functions in these files are declared in `sic.h':
|
#ifndef SIC_H
#define SIC_H 1
#include <sic/common.h>
#include <sic/sic.h>
#include <sic/builtin.h>
BEGIN_C_DECLS
extern Syntax syntax_table[];
extern Builtin builtin_table[];
extern Syntax syntax_table[];
extern int evalstream (Sic *sic, FILE *stream);
extern int evalline (Sic *sic, char **pline);
extern int source (Sic *sic, const char *path);
extern int syntax_init (Sic *sic);
extern int syntax_finish (Sic *sic, BufferIn *in, BufferOut *out);
END_C_DECLS
#endif /* !SIC_H */
|
To hold together everything you have seen so far, the main
function creates a Sic parser and initialises it by adding syntax
handler functions and builtin functions from the two tables defined
earlier, before handing control to evalstream which will
eventually exit when the input stream is exhausted.
|
int
main (int argc, char * const argv[])
{
int result = EXIT_SUCCESS;
Sic *sic = sic_new ();
/* initialise the system */
if (sic_init (sic) != SIC_OKAY)
sic_fatal ("sic initialisation failed");
signal (SIGINT, SIG_IGN);
setbuf (stdout, NULL);
/* initial symbols */
sicstate_set (sic, "PS1", "] ", NULL);
sicstate_set (sic, "PS2", "- ", NULL);
/* evaluate the input stream */
evalstream (sic, stdin);
exit (result);
}
|
Now, the shell can be built and used:
|
$ bootstrap
...
$ ./configure --with-readline
...
$ make
...
make[2]: Entering directory `/tmp/sic/src'
gcc -DHAVE_CONFIG_H -I. -I.. -I../sic -I.. -I../sic -g -c sic.c
gcc -DHAVE_CONFIG_H -I. -I.. -I../sic -I.. -I../sic -g -c sic_builtin.c
gcc -DHAVE_CONFIG_H -I. -I.. -I../sic -I.. -I../sic -g -c sic_repl.c
gcc -DHAVE_CONFIG_H -I. -I.. -I../sic -I.. -I../sic -g -c sic_syntax.c
gcc -g -O2 -o sic sic.o sic_builtin.o sic_repl.o sic_syntax.o \
../sic/libsic.a ../replace/libreplace.a -lreadline
make[2]: Leaving directory `/tmp/sic/src'
...
$ ./src/sic
] pwd
/tmp/sic
] ls -F
Makefile aclocal.m4 config.cache configure* sic/
Makefile.am bootstrap* config.log configure.in src/
Makefile.in config/ config.status* replace/
] exit
$
|
This chapter has developed a solid foundation of code, which I will
return to in 12. A Large GNU Autotools Project, when Libtool will join
the fray. The chapters leading up to that explain what Libtool is for,
how to use it and integrate it into your own projects, and the
advantages it offers over building shared libraries with Automake (or
even just Make) alone.
|