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#ifndef MESSAGE_HEADER_PARSER_H
#define MESSAGE_HEADER_PARSER_H
#define IS_LWSP(c) \
((c) == ' ' || (c) == '\t')
struct message_size;
struct message_header_parser_ctx;
enum message_header_parser_flags {
/* Don't add LWSP after "header: " to value. */
MESSAGE_HEADER_PARSER_FLAG_SKIP_INITIAL_LWSP = 0x01,
/* Don't add CRs to full_value even if input had them */
MESSAGE_HEADER_PARSER_FLAG_DROP_CR = 0x02,
/* Convert [CR+]LF+LWSP to a space character in full_value */
MESSAGE_HEADER_PARSER_FLAG_CLEAN_ONELINE = 0x04
};
struct message_header_line {
const char *name;
size_t name_len;
const unsigned char *value;
size_t value_len;
const unsigned char *full_value;
size_t full_value_len;
const unsigned char *middle;
size_t middle_len;
uoff_t name_offset, full_value_offset;
bool continues:1; /* multiline header, continues in next line */
bool continued:1; /* multiline header, continues */
bool eoh:1; /* "end of headers" line */
bool no_newline:1; /* no \n after this line */
bool crlf_newline:1; /* newline was \r\n */
bool use_full_value:1; /* set if you want full_value */
};
/* called once with hdr = NULL at the end of headers */
typedef void message_header_callback_t(struct message_header_line *hdr,
void *context);
struct message_header_parser_ctx *
message_parse_header_init(struct istream *input, struct message_size *hdr_size,
enum message_header_parser_flags flags) ATTR_NULL(2);
void message_parse_header_deinit(struct message_header_parser_ctx **ctx);
/* Read and return next header line. Returns 1 if header is returned, 0 if
input stream is non-blocking and more data needs to be read, -1 when all is
done or error occurred (see stream's error status). */
int message_parse_header_next(struct message_header_parser_ctx *ctx,
struct message_header_line **hdr_r);
/* Returns TRUE if the parser has seen NUL characters. */
bool message_parse_header_has_nuls(const struct message_header_parser_ctx *ctx)
ATTR_PURE;
/* Read and parse the header from the given stream. */
void message_parse_header(struct istream *input, struct message_size *hdr_size,
enum message_header_parser_flags flags,
message_header_callback_t *callback, void *context)
ATTR_NULL(2);
#define message_parse_header(input, hdr_size, flags, callback, context) \
message_parse_header(input, hdr_size, flags - \
CALLBACK_TYPECHECK(callback, void (*)( \
struct message_header_line *hdr, typeof(context))), \
(message_header_callback_t *)callback, context)
/* Write the header line to buffer exactly as it was read, including the
newline. */
void message_header_line_write(buffer_t *output,
const struct message_header_line *hdr);
/* Duplicate the given header value data and return it. Replaces any NULs with
UNICODE_REPLACEMENT_CHAR_UTF8. */
const char *
message_header_strdup(pool_t pool, const unsigned char *data, size_t size);
/* Returns TRUE if message header name is valid. */
bool message_header_name_is_valid(const char *name);
#endif
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