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ca56d3d28b
Now preceeding a config condition term with "!" will simply negate it.
Example:
.if !feature(OPENSSL)
.alert "SSL support is mandatory"
.endif
81 lines
2.7 KiB
C
81 lines
2.7 KiB
C
/*
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* include/haproxy/cfgcond-t.h
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* Types for the configuration condition preprocessor
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*
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* Copyright (C) 2000-2021 Willy Tarreau - w@1wt.eu
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, version 2.1
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* exclusively.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _HAPROXY_CFGCOND_T_H
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#define _HAPROXY_CFGCOND_T_H
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#include <haproxy/api-t.h>
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/* nested if/elif/else/endif block states */
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enum nested_cond_state {
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NESTED_COND_IF_TAKE, // "if" with a true condition
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NESTED_COND_IF_DROP, // "if" with a false condition
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NESTED_COND_IF_SKIP, // "if" masked by an outer false condition
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NESTED_COND_ELIF_TAKE, // "elif" with a true condition from a false one
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NESTED_COND_ELIF_DROP, // "elif" with a false condition from a false one
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NESTED_COND_ELIF_SKIP, // "elif" masked by an outer false condition or a previously taken if
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NESTED_COND_ELSE_TAKE, // taken "else" after an if false condition
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NESTED_COND_ELSE_DROP, // "else" masked by outer false condition or an if true condition
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};
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/* 100 levels of nested conditions should already be sufficient */
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#define MAXNESTEDCONDS 100
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/* supported conditional predicates for .if/.elif */
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enum cond_predicate {
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CFG_PRED_NONE, // none
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CFG_PRED_DEFINED, // "defined"
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CFG_PRED_FEATURE, // "feature"
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CFG_PRED_STREQ, // "streq"
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CFG_PRED_STRNEQ, // "strneq"
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CFG_PRED_VERSION_ATLEAST, // "version_atleast"
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CFG_PRED_VERSION_BEFORE, // "version_before"
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};
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/* types for condition terms */
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enum cfg_cond_term_type {
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CCTT_NONE = 0,
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CCTT_FALSE,
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CCTT_TRUE,
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CCTT_PRED,
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};
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/* keyword for a condition predicate */
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struct cond_pred_kw {
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const char *word; // NULL marks the end of the list
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enum cond_predicate prd; // one of the CFG_PRED_* above
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uint64_t arg_mask; // mask of supported arguments (strings only)
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};
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/* condition term */
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struct cfg_cond_term {
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enum cfg_cond_term_type type; // CCTT_*
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struct arg *args; // arguments for predicates
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int neg; // 0: direct result; 1: negate
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union {
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const struct cond_pred_kw *pred; // predicate (function)
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};
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};
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#endif /* _HAPROXY_CFGCOND_T_H */
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