1 files changed, 156 insertions, 0 deletions
diff --git a/common.h b/common.h
new file mode 100644
index 0000000..b5def37
--- /dev/null
+++ b/common.h
@@ -0,0 +1,156 @@
+/* See LICENSE file for copyright and license details. */
+#include <libsimple.h>
+#include <libsimple-arg.h>
+#include "config.h"
+
+
+enum argument_type {
+	/* .text and .length */
+	QUOTED, /* \ or '…' or $'…' */
+	UNQUOTED, /* normal */
+	/* .child */
+	QUOTE_EXPRESSION, /* "…" */
+	BACKQUOTE_EXPRESSION, /* `…` */
+	ARITHMETIC_EXPRESSION, /* $((…)) */
+	VARIABLE_SUBSTITUTION, /* ${…} */
+	SUBSHELL_SUBSTITUTION, /* $(…) */
+	PROCESS_SUBSTITUTION_INPUT, /* >(…) */
+	PROCESS_SUBSTITUTION_OUTPUT, /* <(…) */
+	PROCESS_SUBSTITUTION_INPUT_OUTPUT, /* <>(…) */
+	SUBSHELL, /* (…) ## if non-first argument: format shell code into a string (can be used for a clean subshell) */
+	ARITHMETIC_SUBSHELL, /* ((…)) ## if non-first argument: format shell code into a string */
+	/* (none) */
+	REDIRECTION, /* at beginning of argument, use next redirection and use reminder of argument as right-hand side */
+	FUNCTION_MARK /* () */
+};
+
+enum redirection_type {
+	REDIRECT_INPUT,
+	REDIRECT_INPUT_TO_FD,
+	REDIRECT_OUTPUT,
+	REDIRECT_OUTPUT_APPEND,
+	REDIRECT_OUTPUT_CLOBBER,
+	REDIRECT_OUTPUT_TO_FD,
+	REDIRECT_OUTPUT_AND_STDERR,
+	REDIRECT_OUTPUT_AND_STDERR_APPEND,
+	REDIRECT_OUTPUT_AND_STDERR_CLOBBER,
+	REDIRECT_OUTPUT_AND_STDERR_TO_FD,
+	REDIRECT_INPUT_OUTPUT,
+	REDIRECT_INPUT_OUTPUT_TO_FD,
+	HERE_STRING,
+	HERE_DOCUMENT,
+	HERE_DOCUMENT_INDENTED
+};
+
+enum tokeniser_mode {
+	NORMAL_MODE,
+	COMMENT_MODE,
+	BQ_QUOTE_MODE,
+	DQ_QUOTE_MODE,
+	RRB_QUOTE_MODE,
+	RB_QUOTE_MODE,
+	SB_QUOTE_MODE,
+	CB_QUOTE_MODE,
+	HERE_DOCUMENT_MODE
+};
+
+enum command_terminal {
+	DOUBLE_SEMICOLON,
+	SEMICOLON,
+	AMPERSAND,
+	SOCKET_PIPE,
+	PIPE,
+	PIPE_AMPERSAND,
+	AND,
+	OR
+};
+
+struct parser_state;
+
+struct argument {
+	enum argument_type type;
+	union {
+		struct {
+			char *text;
+			size_t length;
+		};
+		struct parser_state *child;
+	};
+	size_t line_number;
+	struct argument *next_part;
+};
+
+struct redirection {
+	enum redirection_type type;
+	struct argument *left_hand_side;
+};
+
+struct command {
+	enum command_terminal terminal;
+	struct argument **arguments;
+	size_t narguments;
+	struct redirection **redirections;
+	size_t nredirections;
+};
+
+struct parser_state {
+	struct parser_state *parent;
+	struct command **commands;
+	size_t ncommands;
+	struct argument **arguments;
+	size_t narguments;
+	struct redirection **redirections;
+	size_t nredirections;
+	struct argument *current_argument;
+	struct argument *current_argument_end;
+	char need_right_hand_side;
+};
+
+struct here_document {
+	struct redirection *redirection;
+	struct argument *argument;
+	struct here_document *next;
+};
+
+struct mode_stack {
+	enum tokeniser_mode mode;
+	int she_is_comment;
+	struct mode_stack *previous;
+};
+
+struct parser_context {
+	int tty_input;
+	int end_of_file_reached;
+	int premature_end_of_file;
+	size_t preparser_offset;
+	size_t preparser_line_number;
+	size_t line_continuations;
+	size_t tokeniser_line_number;
+	struct mode_stack *mode_stack;
+	struct parser_state *parser_state;
+	struct here_document *here_documents_first;
+	struct here_document **here_documents_next;
+};
+
+
+/* apsh.c */
+void initialise_parser_context(struct parser_context *ctx);
+
+/* preparser.c */
+size_t parse(struct parser_context *ctx, char *code, size_t code_len, size_t *nremovedp);
+
+/* tokeniser.c */
+void push_mode(struct parser_context *ctx, enum tokeniser_mode mode);
+void pop_mode(struct parser_context *ctx);
+size_t parse_preparsed(struct parser_context *ctx, char *code, size_t code_len);
+
+/* parser.c */
+void push_end_of_file(struct parser_context *ctx);
+void push_whitespace(struct parser_context *ctx, int strict);
+void push_semicolon(struct parser_context *ctx, int maybe);
+size_t push_symbol(struct parser_context *ctx, char *token, size_t token_len);
+void push_quoted(struct parser_context *ctx, char *text, size_t text_len);
+void push_escaped(struct parser_context *ctx, char *text, size_t text_len);
+void push_unquoted(struct parser_context *ctx, char *text, size_t text_len);
+void push_enter(struct parser_context *ctx, enum argument_type type);
+void push_leave(struct parser_context *ctx);