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83 lines
2.8 KiB
83 lines
2.8 KiB
6 years ago
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/* =========================================================================
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zrex - work with regular expressions
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Copyright (c) the Contributors as noted in the AUTHORS file.
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This file is part of CZMQ, the high-level C binding for 0MQ:
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http://czmq.zeromq.org.
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This Source Code Form is subject to the terms of the Mozilla Public
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License, v. 2.0. If a copy of the MPL was not distributed with this
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file, You can obtain one at http://mozilla.org/MPL/2.0/.
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=========================================================================
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*/
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#ifndef __ZREX_H_INCLUDED__
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#define __ZREX_H_INCLUDED__
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#ifdef __cplusplus
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extern "C" {
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#endif
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// @interface
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// Constructor. Optionally, sets an expression against which we can match
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// text and capture hits. If there is an error in the expression, reports
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// zrex_valid() as false and provides the error in zrex_strerror(). If you
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// set a pattern, you can call zrex_matches() to test it against text.
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CZMQ_EXPORT zrex_t *
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zrex_new (const char *expression);
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// Destructor
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CZMQ_EXPORT void
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zrex_destroy (zrex_t **self_p);
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// Return true if the expression was valid and compiled without errors.
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CZMQ_EXPORT bool
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zrex_valid (zrex_t *self);
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// Return the error message generated during compilation of the expression.
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CZMQ_EXPORT const char *
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zrex_strerror (zrex_t *self);
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// Returns true if the text matches the previously compiled expression.
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// Use this method to compare one expression against many strings.
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CZMQ_EXPORT bool
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zrex_matches (zrex_t *self, const char *text);
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// Returns true if the text matches the supplied expression. Use this
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// method to compare one string against several expressions.
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CZMQ_EXPORT bool
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zrex_eq (zrex_t *self, const char *text, const char *expression);
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// Returns number of hits from last zrex_matches or zrex_eq. If the text
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// matched, returns 1 plus the number of capture groups. If the text did
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// not match, returns zero. To retrieve individual capture groups, call
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// zrex_hit ().
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CZMQ_EXPORT int
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zrex_hits (zrex_t *self);
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// Returns the Nth capture group from the last expression match, where
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// N is 0 to the value returned by zrex_hits(). Capture group 0 is the
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// whole matching string. Sequence 1 is the first capture group, if any,
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// and so on.
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CZMQ_EXPORT const char *
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zrex_hit (zrex_t *self, uint index);
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// Fetches hits into string variables provided by caller; this makes for
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// nicer code than accessing hits by index. Caller should not modify nor
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// free the returned values. Returns number of strings returned. This
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// method starts at hit 1, i.e. first capture group, as hit 0 is always
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// the original matched string.
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CZMQ_EXPORT int
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zrex_fetch (zrex_t *self, const char **string_p, ...);
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// Self test of this class
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CZMQ_EXPORT void
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zrex_test (bool verbose);
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// @end
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#ifdef __cplusplus
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}
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#endif
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#endif
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