driver: created program skeleton.

1 files changed, 97 insertions, 0 deletions

diff --git a/src/driver/tbnf_amain.c b/src/driver/tbnf_amain.c
new file mode 100644
index 0000000..62e66bc
--- /dev/null
+++ b/src/driver/tbnf_amain.c
@@ -0,0 +1,97 @@
+/**************************************************************/
+/*  treebnf: a tree oriented bnf library                      */
+/*  Copyright (C) 2024  SysDeer Technologies, LLC             */
+/*  Released under GPLv2 and GPLv3; see COPYING.TREEBNF.      */
+/**************************************************************/
+
+#include <stdio.h>
+#include <unistd.h>
+#include <treebnf/treebnf.h>
+#include "treebnf_driver_impl.h"
+#include "treebnf_dprintf_impl.h"
+
+#ifndef TBNF_DRIVER_FLAGS
+#define TBNF_DRIVER_FLAGS	TBNF_DRIVER_VERBOSITY_ERRORS \
+				| TBNF_DRIVER_VERBOSITY_USAGE
+#endif
+
+static const char vermsg[] = "%s%s%s (https://git.foss21.org/tulips/treebnf): "
+			     "version %s%d.%d.%d%s.\n"
+			     "[commit reference: %s%s%s]\n";
+
+static const char * const tbnf_ver_color[6] = {
+		"\x1b[1m\x1b[35m","\x1b[0m",
+		"\x1b[1m\x1b[32m","\x1b[0m",
+		"\x1b[1m\x1b[34m","\x1b[0m"
+};
+
+static const char * const tbnf_ver_plain[6] = {
+		"","",
+		"","",
+		"",""
+};
+
+static ssize_t tbnf_version(struct tbnf_driver_ctx * dctx, int fdout)
+{
+	const struct tbnf_source_version * verinfo;
+	const char * const * verclr;
+
+	verinfo = tbnf_api_source_version();
+	verclr  = isatty(fdout) ? tbnf_ver_color : tbnf_ver_plain;
+
+	return tbnf_dprintf(
+			fdout,vermsg,
+			verclr[0],dctx->program,verclr[1],
+			verclr[2],verinfo->major,verinfo->minor,
+			verinfo->revision,verclr[3],
+			verclr[4],verinfo->commit,verclr[5]);
+}
+
+static void tbnf_perform_unit_actions(
+	const struct tbnf_driver_ctx *	dctx,
+	struct tbnf_unit_ctx *		uctx)
+{
+	uint64_t flags = dctx->cctx->fmtflags;
+
+	(void)dctx;
+	(void)uctx;
+	(void)flags;
+}
+
+static int tbnf_exit(struct tbnf_driver_ctx * dctx, int ret)
+{
+	tbnf_output_error_vector(dctx);
+	tbnf_lib_free_driver_ctx(dctx);
+	return ret;
+}
+
+int tbnf_main(char ** argv, char ** envp, const struct tbnf_fd_ctx * fdctx)
+{
+	int                         ret;
+	int                         fdout;
+	uint64_t                    flags;
+	struct tbnf_driver_ctx *    dctx;
+	struct tbnf_unit_ctx *      uctx;
+	const char **               unit;
+
+	flags = TBNF_DRIVER_FLAGS;
+	fdout = fdctx ? fdctx->fdout : STDOUT_FILENO;
+
+	if ((ret = tbnf_lib_get_driver_ctx(argv,envp,flags,fdctx,&dctx)))
+		return (ret == TBNF_USAGE)
+			? !argv || !argv[0] || !argv[1]
+			: TBNF_ERROR;
+
+	if (dctx->cctx->drvflags & TBNF_DRIVER_VERSION)
+		if ((tbnf_version(dctx,fdout)) < 0)
+			return tbnf_exit(dctx,TBNF_ERROR);
+
+	for (unit=dctx->units; *unit; unit++) {
+		if (!(tbnf_lib_get_unit_ctx(dctx,*unit,&uctx))) {
+			tbnf_perform_unit_actions(dctx,uctx);
+			tbnf_lib_free_unit_ctx(uctx);
+		}
+	}
+
+	return tbnf_exit(dctx,dctx->errv[0] ? TBNF_ERROR : TBNF_OK);
+}