opt: Separate optimization from parsing

1 files changed, 123 insertions, 0 deletions

diff --git a/cmdline.h b/cmdline.h
new file mode 100644
index 0000000..a1dadc3
--- /dev/null
+++ b/cmdline.h
@@ -0,0 +1,123 @@
+/****************************************************************************
+ * bfs                                                                      *
+ * Copyright (C) 2015-2017 Tavian Barnes <tavianator@tavianator.com>        *
+ *                                                                          *
+ * Permission to use, copy, modify, and/or distribute this software for any *
+ * purpose with or without fee is hereby granted.                           *
+ *                                                                          *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES *
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF         *
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR  *
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES   *
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN    *
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF  *
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.           *
+ ****************************************************************************/
+
+#ifndef CMDLINE_H
+#define CMDLINE_H
+
+#include "color.h"
+
+/**
+ * Various debugging flags.
+ */
+enum debug_flags {
+	/** Print cost estimates. */
+	DEBUG_COST   = 1 << 0,
+	/** Print executed command details. */
+	DEBUG_EXEC   = 1 << 1,
+	/** Print optimization details. */
+	DEBUG_OPT    = 1 << 2,
+	/** Print rate information. */
+	DEBUG_RATES  = 1 << 3,
+	/** Trace the filesystem traversal. */
+	DEBUG_SEARCH = 1 << 4,
+	/** Trace all stat() calls. */
+	DEBUG_STAT   = 1 << 5,
+	/** Print the parse tree. */
+	DEBUG_TREE   = 1 << 6,
+};
+
+/**
+ * A root path to explore.
+ */
+struct root {
+	/** The root path itself. */
+	const char *path;
+	/** The next path in the list. */
+	struct root *next;
+};
+
+/**
+ * The parsed command line.
+ */
+struct cmdline {
+	/** The unparsed command line arguments. */
+	char **argv;
+
+	/** The list of root paths. */
+	struct root *roots;
+
+	/** Color data. */
+	struct colors *colors;
+	/** Colored stdout. */
+	CFILE *cout;
+	/** Colored stderr. */
+	CFILE *cerr;
+
+	/** Table of mounted file systems. */
+	struct bfs_mtab *mtab;
+
+	/** -mindepth option. */
+	int mindepth;
+	/** -maxdepth option. */
+	int maxdepth;
+
+	/** bftw() flags. */
+	enum bftw_flags flags;
+
+	/** Optimization level. */
+	int optlevel;
+	/** Debugging flags. */
+	enum debug_flags debug;
+	/** Whether to only handle paths with xargs-safe characters. */
+	bool xargs_safe;
+	/** Whether to ignore deletions that race with bfs. */
+	bool ignore_races;
+
+	/** The command line expression. */
+	struct expr *expr;
+
+	/** The number of open files used by the expression tree. */
+	int nopen_files;
+};
+
+/**
+ * Optimize the parsed command line.
+ *
+ * @return 0 if successful, -1 on error.
+ */
+int optimize_cmdline(struct cmdline *cmdline);
+
+/**
+ * Parse the command line.
+ */
+struct cmdline *parse_cmdline(int argc, char *argv[]);
+
+/**
+ * Dump the parsed command line.
+ */
+void dump_cmdline(const struct cmdline *cmdline, bool verbose);
+
+/**
+ * Evaluate the command line.
+ */
+int eval_cmdline(const struct cmdline *cmdline);
+
+/**
+ * Free the parsed command line.
+ */
+void free_cmdline(struct cmdline *cmdline);
+
+#endif // CMDLINE_H