1 files changed, 117 insertions, 0 deletions
diff --git a/src/lib-imap/imap-parser.h b/src/lib-imap/imap-parser.h
new file mode 100644
index 0000000..cd3748c
--- /dev/null
+++ b/src/lib-imap/imap-parser.h
@@ -0,0 +1,117 @@
+#ifndef IMAP_PARSER_H
+#define IMAP_PARSER_H
+
+#include "imap-arg.h"
+
+enum imap_parser_flags {
+	/* Set this flag if you wish to read only size of literal argument
+	   and not convert literal into string. Useful when you need to deal
+	   with large literal sizes. The literal must be the last read
+	   parameter. */
+	IMAP_PARSE_FLAG_LITERAL_SIZE	= 0x01,
+	/* Don't remove '\' chars from string arguments */
+	IMAP_PARSE_FLAG_NO_UNESCAPE	= 0x02,
+	/* Return literals as IMAP_ARG_LITERAL instead of IMAP_ARG_STRING */
+	IMAP_PARSE_FLAG_LITERAL_TYPE	= 0x04,
+	/* Don't check if atom contains invalid characters */
+	IMAP_PARSE_FLAG_ATOM_ALLCHARS	= 0x08,
+	/* Allow strings to contain CRLFs */
+	IMAP_PARSE_FLAG_MULTILINE_STR	= 0x10,
+	/* Parse in list context; ')' parses as EOL */
+	IMAP_PARSE_FLAG_INSIDE_LIST	= 0x20,
+	/* Parse literal8 and set it as flag to imap_arg. */
+	IMAP_PARSE_FLAG_LITERAL8	= 0x40,
+	/* We're parsing IMAP server replies. Parse the "text" after
+	   OK/NO/BAD/BYE replies as a single atom. We assume that the initial
+	   "*" or tag was already skipped over. */
+	IMAP_PARSE_FLAG_SERVER_TEXT	= 0x80,
+	/* Parse until '(' and return it as an empty list */
+	IMAP_PARSE_FLAG_STOP_AT_LIST	= 0x100
+};
+
+enum imap_parser_error {
+	/* not fatal */
+	IMAP_PARSE_ERROR_NONE = 0,
+	IMAP_PARSE_ERROR_BAD_SYNTAX,
+	IMAP_PARSE_ERROR_LINE_TOO_LONG,
+	/* fatal */
+	IMAP_PARSE_ERROR_LITERAL_TOO_BIG
+};
+
+struct imap_parser;
+
+/* Create new IMAP argument parser. output is used for sending command
+   continuation requests for literals.
+
+   max_line_size can be used to approximately limit the maximum amount of
+   memory that gets allocated when parsing a line. Input buffer size limits
+   the maximum size of each parsed token.
+
+   Usually the largest lines are large only because they have a one huge
+   message set token, so you'll probably want to keep input buffer size the
+   same as max_line_size. That means the maximum memory usage is around
+   2 * max_line_size. */
+struct imap_parser *
+imap_parser_create(struct istream *input, struct ostream *output,
+		   size_t max_line_size) ATTR_NULL(2);
+void imap_parser_ref(struct imap_parser *parser);
+void imap_parser_unref(struct imap_parser **parser);
+
+/* Enable LITERAL- parser semantics: non-synchronizing literals must not
+   exceed 4096 bytes */
+void imap_parser_enable_literal_minus(struct imap_parser *parser);
+
+/* Reset the parser to initial state. */
+void imap_parser_reset(struct imap_parser *parser);
+
+/* Change parser's input and output streams */
+void imap_parser_set_streams(struct imap_parser *parser, struct istream *input,
+			     struct ostream *output) ATTR_NULL(3);
+
+/* Return the last error in parser. fatal is set to TRUE if there's no way to
+   continue parsing, currently only if too large non-sync literal size was
+   given. */
+const char *imap_parser_get_error(struct imap_parser *parser,
+	enum imap_parser_error *error_r) ATTR_NULL(2);
+
+/* Read a number of arguments. This function doesn't call i_stream_read(), you
+   need to do that. Returns number of arguments read (may be less than count
+   in case of EOL), -2 if more data is needed or -1 if error occurred.
+
+   count-sized array of arguments are stored into args when return value is
+   0 or larger. If all arguments weren't read, they're set to NIL. count
+   can be set to 0 to read all arguments in the line. Last element in
+   args is always of type IMAP_ARG_EOL. */
+int imap_parser_read_args(struct imap_parser *parser, unsigned int count,
+			  enum imap_parser_flags flags,
+			  const struct imap_arg **args_r);
+/* If parsing ended with literal size, return it. */
+bool imap_parser_get_literal_size(struct imap_parser *parser, uoff_t *size_r);
+/* IMAP_PARSE_FLAG_LITERAL_SIZE is set and last read argument was a literal.
+   Calling this function causes the literal size to be replaced with the actual
+   literal data when continuing argument parsing. */
+void imap_parser_read_last_literal(struct imap_parser *parser);
+
+/* just like imap_parser_read_args(), but assume \n at end of data in
+   input stream. */
+int imap_parser_finish_line(struct imap_parser *parser, unsigned int count,
+			    enum imap_parser_flags flags,
+			    const struct imap_arg **args_r);
+
+/* Read one word - used for reading tag and command name.
+   Returns NULL if more data is needed. */
+const char *imap_parser_read_word(struct imap_parser *parser);
+/* Read command tag. Returns 1 if tag was returned, 0 if more data is needed,
+   -1 if input isn't a valid tag. */
+int imap_parser_read_tag(struct imap_parser *parser, const char **tag_r);
+/* Read command name. Returns 1 if command name was returned, 0 if more data is
+   needed, -1 if input isn't a valid command name string. */
+int imap_parser_read_command_name(struct imap_parser *parser,
+				  const char **name_r);
+/* For IMAP clients: Read the command tag, which could also be "+" or "*".
+   Returns 1 if tag was returned, 0 if more data is needed, -1 if input isn't
+   valid. */
+int imap_parser_client_read_tag(struct imap_parser *parser,
+				const char **tag_r);
+
+#endif