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43 lines
1.5 KiB
Plaintext
43 lines
1.5 KiB
Plaintext
.TH PCRE2_SET_OPTIMIZE 3 "22 September 2024" "PCRE2 10.45"
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.SH NAME
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PCRE2 - Perl-compatible regular expressions (revised API)
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.SH SYNOPSIS
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.rs
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.sp
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.B #include <pcre2.h>
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.PP
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.nf
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.B int pcre2_set_optimize(pcre2_compile_context *\fIccontext\fP,
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.B " uint32_t \fIdirective\fP);"
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.fi
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.
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.SH DESCRIPTION
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.rs
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.sp
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This function controls which performance optimizations will be applied
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by \fBpcre2_compile()\fP. It can be called multiple times with the same compile
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context; the effects are cumulative, with the effects of later calls taking
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precedence over earlier ones.
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.P
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The result is zero for success, PCRE2_ERROR_NULL if \fIccontext\fP is NULL,
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or PCRE2_ERROR_BADOPTION if \fIdirective\fP is unknown. The latter could be
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useful to detect if a certain optimization is available.
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.P
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The list of possible values for the \fIdirective\fP parameter are:
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.sp
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PCRE2_OPTIMIZATION_FULL Enable all optimizations (default)
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PCRE2_OPTIMIZATION_NONE Disable all optimizations
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PCRE2_AUTO_POSSESS Enable auto-possessification
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PCRE2_AUTO_POSSESS_OFF Disable auto-possessification
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PCRE2_DOTSTAR_ANCHOR Enable implicit dotstar anchoring
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PCRE2_DOTSTAR_ANCHOR_OFF Disable implicit dotstar anchoring
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PCRE2_START_OPTIMIZE Enable start-up optimizations at match time
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PCRE2_START_OPTIMIZE_OFF Disable start-up optimizations at match time
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.sp
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There is a complete description of the PCRE2 native API, including detailed
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descriptions \fIdirective\fP parameter values in the
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.\" HREF
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\fBpcre2api\fP
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.\"
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page.
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