skip.c File Reference

Preparse input by skipping known tokens. More...

#include <freeradius-devel/util/misc.h>
#include <freeradius-devel/util/skip.h>
#include <freeradius-devel/util/strerror.h>

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Functions
ssize_t	fr_skip_condition (char const *start, char const *end, bool const terminal[static UINT8_MAX+1], bool *eol)
	Skip a conditional expression.
ssize_t	fr_skip_string (char const *start, char const *end)
	Skip a quoted string.
ssize_t	fr_skip_xlat (char const *start, char const *end)
	Skip an xlat expression.

Detailed Description

Preparse input by skipping known tokens.

Copyright

2025 Network RADIUS SAS (legal.nosp@m.@net.nosp@m.workr.nosp@m.adiu.nosp@m.s.com)

Definition in file skip.c.

Function Documentation

fr_skip_condition()

ssize_t fr_skip_condition	(	char const *	start,
		char const *	end,
		bool const	terminal[static UINT8_MAX+1],
		bool *	eol
	)

Skip a conditional expression.

This is a simple "peek ahead" parser which tries to not be wrong. It may accept some things which will later parse as invalid (e.g. unknown attributes, etc.) But it also rejects all malformed expressions.

It's used as a quick hack because the full parser isn't always available.

Parameters

[in]	start	start of the condition.
[in]	end	end of the string (or NULL for zero-terminated strings)
[in]	terminal	terminal character(s)
[out]	eol	did the parse error happen at eol?

Returns

>0 length of the string which was parsed. *eol is false. <=0 on error, *eol may be set.

Definition at line 264 of file skip.c.

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fr_skip_string()

ssize_t fr_skip_string	(	char const *	start,
		char const *	end
	)

Skip a quoted string.

Parameters

[in]	start	start of the string, pointing to the quotation character
[in]	end	end of the string (or NULL for zero-terminated strings)

Returns

>0 length of the string which was parsed <=0 on error

Definition at line 37 of file skip.c.

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fr_skip_xlat()

ssize_t fr_skip_xlat	(	char const *	start,
		char const *	end
	)

Skip an xlat expression.

This is a simple "peek ahead" parser which tries to not be wrong. It may accept some things which will later parse as invalid (e.g. unknown attributes, etc.) But it also rejects all malformed expressions.

It's used as a quick hack because the full parser isn't always available.

Parameters

[in]	start	start of the expression, MUST point to the "%{" or "%("
[in]	end	end of the string (or NULL for zero-terminated strings)

Returns

>0 length of the string which was parsed <=0 on error

Definition at line 128 of file skip.c.

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