wash
edfb3e24a3
bshell: the front-end binary bshell.runtime: contains the parser, compiler, and classes needed to run bshell scripts bshell.core: contains the builtin commandlets and aliases
205 lines
7.5 KiB
C
205 lines
7.5 KiB
C
#ifndef PARSE_LEX_INTERNAL_H_
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#define PARSE_LEX_INTERNAL_H_
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#include <bshell/parse/lex.h>
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#include <bshell/parse/token.h>
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#include <bshell/status.h>
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struct bshell_lex_ctx;
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enum state_flags {
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/* statement: don't convert matching words to keywords */
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STATEMENT_F_DISABLE_KEYWORDS = 0x01u,
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/* arithmetic: don't switch back to statement mode even when
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* encountering a token that would otherwise require it. */
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ARITHMETIC_F_DISABLE_STATEMENTS = 0x01u,
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};
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enum read_flags {
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READ_APPEND_HYPHEN = 0x01u,
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READ_NO_SET_TOKEN_START = 0x02u,
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READ_NO_NUMBER_RECOGNITION = 0x04u,
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};
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enum link_flags {
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LINK_ALLOW_RECURSION = 0x01u,
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};
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#define LINK_PUSH(tok, target, flags) \
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((struct bshell_lex_state_link) { \
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.l_token = (tok), \
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.l_type = BSHELL_LEX_STATE_LINK_PUSH, \
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.l_target = (target), \
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.l_target_flags = (flags), \
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})
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#define LINK_PUSH_WITH_TERM(tok, target, flags, ...) \
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((struct bshell_lex_state_link) { \
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.l_token = (tok), \
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.l_type = BSHELL_LEX_STATE_LINK_PUSH, \
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.l_target = (target), \
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.l_target_flags = (flags), \
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.l_terminators = {__VA_ARGS__, BSHELL_TOK_NONE}, \
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})
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#define LINK_CHANGE(tok, target) \
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((struct bshell_lex_state_link) { \
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.l_token = (tok), \
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.l_type = BSHELL_LEX_STATE_LINK_CHANGE, \
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.l_target = (target), \
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})
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#define LINK_POP(tok) \
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((struct bshell_lex_state_link) { \
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.l_token = (tok), \
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.l_type = BSHELL_LEX_STATE_LINK_POP, \
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})
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#define LINK_POP2(tok, flags) \
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((struct bshell_lex_state_link) { \
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.l_token = (tok), \
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.l_type = BSHELL_LEX_STATE_LINK_POP, \
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.l_flags = (flags), \
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})
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#define LINK_NONE(tok) \
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((struct bshell_lex_state_link) { \
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.l_token = (tok), \
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.l_type = BSHELL_LEX_STATE_LINK_NONE, \
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})
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#define LINK_END ((struct bshell_lex_state_link) {})
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struct bshell_lex_state_link {
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unsigned int l_token;
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enum {
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BSHELL_LEX_STATE_LINK_NONE,
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BSHELL_LEX_STATE_LINK_PUSH,
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BSHELL_LEX_STATE_LINK_CHANGE,
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BSHELL_LEX_STATE_LINK_POP,
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} l_type;
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enum link_flags l_flags;
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enum bshell_lex_state_id l_target;
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enum state_flags l_target_flags;
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unsigned int l_terminators[BSHELL_LEX_STATE_MAX_TERMINATORS];
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};
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typedef enum bshell_status (*lex_state_pump_token)(struct bshell_lex_ctx *);
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typedef enum bshell_status (*lex_state_begin)(struct bshell_lex_ctx *);
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typedef enum bshell_status (*lex_state_end)(struct bshell_lex_ctx *);
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struct bshell_lex_state_type {
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enum bshell_lex_state_id s_id;
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lex_state_pump_token s_pump_token;
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lex_state_begin s_begin;
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lex_state_end s_end;
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const unsigned int *s_keywords;
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const unsigned int *s_operators;
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const unsigned int *s_symbols;
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const struct bshell_lex_state_link *s_links;
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};
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extern enum bshell_status pump_token_statement(struct bshell_lex_ctx *ctx);
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extern enum bshell_status pump_token_expression(struct bshell_lex_ctx *ctx);
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extern enum bshell_status pump_token_command(struct bshell_lex_ctx *ctx);
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extern enum bshell_status pump_token_arithmetic(struct bshell_lex_ctx *ctx);
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extern enum bshell_status pump_token_string(struct bshell_lex_ctx *ctx);
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extern void set_token_start(struct bshell_lex_ctx *ctx);
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extern void set_token_end(struct bshell_lex_ctx *ctx);
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extern struct bshell_lex_state *lex_state_push(
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struct bshell_lex_ctx *ctx,
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enum bshell_lex_state_id state_type,
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enum state_flags flags);
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extern void lex_state_pop(struct bshell_lex_ctx *ctx);
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extern struct bshell_lex_state *lex_state_get(struct bshell_lex_ctx *ctx);
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extern void lex_state_change(
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struct bshell_lex_ctx *ctx,
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enum bshell_lex_state_id type);
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extern fx_string *lex_state_get_tempstr(struct bshell_lex_ctx *ctx);
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extern void lex_state_add_terminator(
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struct bshell_lex_state *state,
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unsigned int tok);
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extern bool lex_state_terminates_at_token(
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struct bshell_lex_ctx *ctx,
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unsigned int tok);
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extern fx_wchar peek_char(struct bshell_lex_ctx *ctx);
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extern fx_wchar peek_char_noread(struct bshell_lex_ctx *ctx);
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extern fx_wchar peek2_char(struct bshell_lex_ctx *ctx);
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extern fx_wchar peek2_char_noread(struct bshell_lex_ctx *ctx);
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extern void advance_char(struct bshell_lex_ctx *ctx);
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extern void advance_char_noread(struct bshell_lex_ctx *ctx);
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extern bool string_is_valid_number(
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const char *s,
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fx_value *out,
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enum bshell_lex_token_type *out_type);
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extern bool convert_word_to_number(struct bshell_lex_token *tok);
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extern bool convert_word_to_keyword(struct bshell_lex_token *tok);
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extern bool convert_word_to_operator(
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struct bshell_lex_ctx *ctx,
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struct bshell_lex_token *tok);
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extern void enqueue_token(
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struct bshell_lex_ctx *ctx,
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struct bshell_lex_token *tok);
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extern void enqueue_token_with_coordinates(
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struct bshell_lex_ctx *ctx,
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struct bshell_lex_token *tok,
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const struct bshell_char_cell *start,
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const struct bshell_char_cell *end);
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extern enum bshell_status read_word(
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struct bshell_lex_ctx *ctx,
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enum read_flags flags,
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struct bshell_lex_token **out);
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extern enum bshell_status read_symbol(
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struct bshell_lex_ctx *ctx,
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const struct bshell_lex_token_definition **out);
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extern enum bshell_status read_literal_string(
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struct bshell_lex_ctx *ctx,
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struct bshell_lex_token **out);
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extern enum bshell_status read_line_comment(struct bshell_lex_ctx *lex);
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extern enum bshell_status read_var(
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struct bshell_lex_ctx *ctx,
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enum bshell_lex_token_type type,
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struct bshell_lex_token **out);
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extern enum bshell_status read_braced_var(
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struct bshell_lex_ctx *ctx,
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enum bshell_lex_token_type type,
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struct bshell_lex_token **out);
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extern enum bshell_status push_symbol(
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struct bshell_lex_ctx *ctx,
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enum bshell_lex_symbol sym);
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extern bool char_can_begin_symbol(struct bshell_lex_ctx *ctx, char c);
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extern bool char_can_begin_symbol_in_state(
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struct bshell_lex_ctx *ctx,
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char c,
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enum bshell_lex_state_id state_type);
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extern bool char_has_flags(
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struct bshell_lex_ctx *ctx,
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char c,
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enum bshell_lex_token_flags flags);
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extern bool keyword_has_flags(
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struct bshell_lex_ctx *ctx,
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enum bshell_lex_keyword kw,
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enum bshell_lex_token_flags flags);
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extern enum bshell_lex_token_flags keyword_get_flags(
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struct bshell_lex_ctx *ctx,
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enum bshell_lex_keyword kw);
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extern bool symbol_has_flags(
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struct bshell_lex_ctx *ctx,
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enum bshell_lex_symbol sym,
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enum bshell_lex_token_flags flags);
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extern enum bshell_lex_token_flags symbol_get_flags(
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struct bshell_lex_ctx *ctx,
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enum bshell_lex_symbol sym);
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extern enum bshell_lex_operator get_bshell_operator_with_string(
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struct bshell_lex_ctx *ctx,
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const char *s);
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extern void handle_lex_state_transition(
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struct bshell_lex_ctx *ctx,
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unsigned int token);
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#endif
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