-/* How often diagnostics are prefixed by their locations:
- o DIAGNOSTICS_SHOW_PREFIX_NEVER: never - not yet supported;
- o DIAGNOSTICS_SHOW_PREFIX_ONCE: emit only once;
- o DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE: emit each time a physical
- line is started. */
-typedef enum
-{
- DIAGNOSTICS_SHOW_PREFIX_ONCE = 0x0,
- DIAGNOSTICS_SHOW_PREFIX_NEVER = 0x1,
- DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE = 0x2
-} diagnostic_prefixing_rule_t;
-
-/* This data structure encapsulates an output_buffer's state. */
-typedef struct
-{
- /* The prefix for each new line. */
- const char *prefix;
-
- /* The real upper bound of number of characters per line, taking into
- account the case of a very very looong prefix. */
- int maximum_length;
-
- /* The ideal upper bound of number of characters per line, as suggested
- by front-end. */
- int ideal_maximum_length;
-
- /* Indentation count. */
- int indent_skip;
-
- /* Nonzero if current PREFIX was emitted at least once. */
- bool emitted_prefix_p;
-
- /* Nonzero means one should emit a newline before outputing anything. */
- bool need_newline_p;
-
- /* Current prefixing rule. */
- diagnostic_prefixing_rule_t prefixing_rule;
-} output_state;
-
-/* The type of a hook that formats client-specific data (trees mostly) into
- an output_buffer. A client-supplied formatter returns true if everything
- goes well. */
-typedef struct output_buffer output_buffer;
-typedef bool (*printer_fn) PARAMS ((output_buffer *, text_info *));
-
-/* The output buffer datatype. This is best seen as an abstract datatype
- whose fields should not be accessed directly by clients. */
-struct output_buffer
-{
- /* The current state of the buffer. */
- output_state state;
-
- /* Where to output formatted text. */
- FILE* stream;
-
- /* The obstack where the text is built up. */
- struct obstack obstack;
-
- /* The amount of characters output so far. */
- int line_length;
-
- /* This must be large enough to hold any printed integer or
- floating-point value. */
- char digit_buffer[128];
-
- /* If non-NULL, this function formats a TEXT into the BUFFER. When called,
- TEXT->format_spec points to a format code. FORMAT_DECODER should call
- output_add_string (and related functions) to add data to the BUFFER.
- FORMAT_DECODER can read arguments from *TEXT->args_pts using VA_ARG.
- If the BUFFER needs additional characters from the format string, it
- should advance the TEXT->format_spec as it goes. When FORMAT_DECODER
- returns, TEXT->format_spec should point to the last character processed.
- */
- printer_fn format_decoder;
-} ;
-
-#define output_prefix(BUFFER) (BUFFER)->state.prefix
-
-/* The stream attached to the output_buffer, where the formatted
- diagnostics will ultimately go. Works only on `output_buffer *'. */
-#define output_buffer_attached_stream(BUFFER) (BUFFER)->stream
-
-/* In line-wrapping mode, whether we should start a new line. */
-#define output_needs_newline(BUFFER) (BUFFER)->state.need_newline_p
-
-/* The amount of whitespace to be emitted when starting a new line. */
-#define output_indentation(BUFFER) (BUFFER)->state.indent_skip
-
-/* A pointer to the formatted diagnostic message. */
-#define output_message_text(BUFFER) \
- ((const char *) obstack_base (&(BUFFER)->obstack))
-
-/* Client supplied function used to decode formats. */
-#define output_format_decoder(BUFFER) (BUFFER)->format_decoder
-
-/* Prefixing rule used in formatting a diagnostic message. */
-#define output_prefixing_rule(BUFFER) (BUFFER)->state.prefixing_rule
-
-/* Maximum characters per line in automatic line wrapping mode.
- Zero means don't wrap lines. */
-#define output_line_cutoff(BUFFER) (BUFFER)->state.ideal_maximum_length
-
-/* True if BUFFER is in line-wrapping mode. */
-#define output_is_line_wrapping(BUFFER) (output_line_cutoff (BUFFER) > 0)
-
-#define output_formatted_scalar(BUFFER, FORMAT, SCALAR) \
- do \
- { \
- sprintf ((BUFFER)->digit_buffer, FORMAT, SCALAR); \
- output_add_string (BUFFER, (BUFFER)->digit_buffer); \
- } \
- while (0)
OSDN Git Service
