mirror of
https://github.com/fish-shell/fish-shell
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191 lines
7.9 KiB
C++
191 lines
7.9 KiB
C++
/** \file parse_util.h
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Various mostly unrelated utility functions related to parsing,
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loading and evaluating fish code.
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*/
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#ifndef FISH_PARSE_UTIL_H
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#define FISH_PARSE_UTIL_H
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#include "autoload.h"
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#include "parse_tree.h"
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#include <wchar.h>
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#include <map>
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#include <set>
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/**
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Find the beginning and end of the first subshell in the specified string.
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\param in the string to search for subshells
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\param begin the starting paranthesis of the subshell
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\param end the ending paranthesis of the subshell
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\param accept_incomplete whether to permit missing closing parenthesis
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\return -1 on syntax error, 0 if no subshells exist and 1 on sucess
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*/
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int parse_util_locate_cmdsubst(const wchar_t *in,
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wchar_t **begin,
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wchar_t **end,
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bool accept_incomplete);
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/** Same as parse_util_locate_cmdsubst, but handles square brackets [ ] */
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int parse_util_locate_slice(const wchar_t *in,
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wchar_t **begin,
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wchar_t **end,
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bool accept_incomplete);
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/**
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Alternative API. Iterate over command substitutions.
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\param str the string to search for subshells
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\param inout_cursor_offset On input, the location to begin the search. On output, either the end of the string, or just after the closed-paren.
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\param out_contents On output, the contents of the command substitution
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\param out_start On output, the offset of the start of the command substitution (open paren)
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\param out_end On output, the offset of the end of the command substitution (close paren), or the end of the string if it was incomplete
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\param accept_incomplete whether to permit missing closing parenthesis
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\return -1 on syntax error, 0 if no subshells exist and 1 on sucess
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*/
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int parse_util_locate_cmdsubst_range(const wcstring &str,
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size_t *inout_cursor_offset,
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wcstring *out_contents,
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size_t *out_start,
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size_t *out_end,
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bool accept_incomplete);
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/**
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Find the beginning and end of the command substitution under the
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cursor. If no subshell is found, the entire string is returned. If
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the current command substitution is not ended, i.e. the closing
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parenthesis is missing, then the string from the beginning of the
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substitution to the end of the string is returned.
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\param buff the string to search for subshells
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\param cursor_pos the position of the cursor
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\param a the start of the searched string
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\param b the end of the searched string
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*/
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void parse_util_cmdsubst_extent(const wchar_t *buff,
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size_t cursor_pos,
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const wchar_t **a,
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const wchar_t **b);
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/**
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Find the beginning and end of the process definition under the cursor
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\param buff the string to search for subshells
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\param cursor_pos the position of the cursor
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\param a the start of the searched string
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\param b the end of the searched string
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*/
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void parse_util_process_extent(const wchar_t *buff,
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size_t cursor_pos,
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const wchar_t **a,
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const wchar_t **b);
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/**
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Find the beginning and end of the job definition under the cursor
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\param buff the string to search for subshells
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\param cursor_pos the position of the cursor
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\param a the start of the searched string
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\param b the end of the searched string
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*/
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void parse_util_job_extent(const wchar_t *buff,
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size_t cursor_pos,
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const wchar_t **a,
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const wchar_t **b);
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/**
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Find the beginning and end of the token under the cursor and the
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token before the current token. Any combination of tok_begin,
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tok_end, prev_begin and prev_end may be null.
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\param buff the string to search for subshells
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\param cursor_pos the position of the cursor
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\param tok_begin the start of the current token
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\param tok_end the end of the current token
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\param prev_begin the start o the token before the current token
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\param prev_end the end of the token before the current token
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*/
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void parse_util_token_extent(const wchar_t *buff,
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size_t cursor_pos,
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const wchar_t **tok_begin,
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const wchar_t **tok_end,
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const wchar_t **prev_begin,
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const wchar_t **prev_end);
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/**
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Get the linenumber at the specified character offset
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*/
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int parse_util_lineno(const wchar_t *str, size_t len);
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/**
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Calculate the line number of the specified cursor position
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*/
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int parse_util_get_line_from_offset(const wcstring &str, size_t pos);
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/**
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Get the offset of the first character on the specified line
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*/
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size_t parse_util_get_offset_from_line(const wcstring &str, int line);
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/**
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Return the total offset of the buffer for the cursor position nearest to the specified poition
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*/
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size_t parse_util_get_offset(const wcstring &str, int line, long line_offset);
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/**
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Set the argv environment variable to the specified null-terminated
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array of strings.
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*/
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void parse_util_set_argv(const wchar_t * const *argv, const wcstring_list_t &named_arguments);
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/**
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Make a duplicate of the specified string, unescape wildcard
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characters but not performing any other character transformation.
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*/
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wchar_t *parse_util_unescape_wildcards(const wchar_t *in);
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/**
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Checks if the specified string is a help option.
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\param s the string to test
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\param min_match is the minimum number of characters that must match in a long style option, i.e. the longest common prefix between --help and any other option. If less than 3, 3 will be assumed.
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*/
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bool parse_util_argument_is_help(const wchar_t *s, int min_match);
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/**
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Calculates information on the parameter at the specified index.
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\param cmd The command to be analyzed
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\param pos An index in the string which is inside the parameter
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\param quote If not NULL, store the type of quote this parameter has, can be either ', " or \\0, meaning the string is not quoted.
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\param offset If not NULL, get_param will store the offset to the beginning of the parameter.
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\param type If not NULL, get_param will store the token type as returned by tok_last.
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*/
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void parse_util_get_parameter_info(const wcstring &cmd, const size_t pos, wchar_t *quote, size_t *offset, int *type);
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/**
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Attempts to escape the string 'cmd' using the given quote type, as determined by the quote character. The quote can be a single quote or double quote, or L'\0' to indicate no quoting (and thus escaping should be with backslashes).
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*/
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wcstring parse_util_escape_string_with_quote(const wcstring &cmd, wchar_t quote);
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/** Given a string, parse it as fish code and then return the indents. The return value has the same size as the string */
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std::vector<int> parse_util_compute_indents(const wcstring &src);
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/** Given a string, detect parse errors in it. If allow_incomplete is set, then if the string is incomplete (e.g. an unclosed quote), an error is not returned and the PARSER_TEST_INCOMPLETE bit is set in the return value. If allow_incomplete is not set, then incomplete strings result in an error. */
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parser_test_error_bits_t parse_util_detect_errors(const wcstring &buff_src, parse_error_list_t *out_errors = NULL, bool allow_incomplete = true);
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/**
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Test if this argument contains any errors. Detected errors include syntax errors in command substitutions, improperly escaped characters and improper use of the variable expansion operator.
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This does NOT currently detect unterminated quotes.
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*/
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parser_test_error_bits_t parse_util_detect_errors_in_argument(const parse_node_t &node, const wcstring &arg_src, parse_error_list_t *out_errors = NULL);
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#endif
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