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54 lines
2.0 KiB
54 lines
2.0 KiB
4 months ago
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.TH PCRE2_SERIALIZE_DECODE 3 "27 June 2018" "PCRE2 10.32"
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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 int32_t pcre2_serialize_decode(pcre2_code **\fIcodes\fP,
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.B " int32_t \fInumber_of_codes\fP, const uint8_t *\fIbytes\fP,"
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.B " pcre2_general_context *\fIgcontext\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 decodes a serialized set of compiled patterns back into a list of
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individual patterns. This is possible only on a host that is running the same
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version of PCRE2, with the same code unit width, and the host must also have
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the same endianness, pointer width and PCRE2_SIZE type. The arguments for
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\fBpcre2_serialize_decode()\fP are:
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.sp
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\fIcodes\fP pointer to a vector in which to build the list
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\fInumber_of_codes\fP number of slots in the vector
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\fIbytes\fP the serialized byte stream
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\fIgcontext\fP pointer to a general context or NULL
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.sp
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The \fIbytes\fP argument must point to a block of data that was originally
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created by \fBpcre2_serialize_encode()\fP, though it may have been saved on
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disc or elsewhere in the meantime. If there are more codes in the serialized
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data than slots in the list, only those compiled patterns that will fit are
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decoded. The yield of the function is the number of decoded patterns, or one of
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the following negative error codes:
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.sp
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PCRE2_ERROR_BADDATA \fInumber_of_codes\fP is zero or less
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PCRE2_ERROR_BADMAGIC mismatch of id bytes in \fIbytes\fP
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PCRE2_ERROR_BADMODE mismatch of variable unit size or PCRE version
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PCRE2_ERROR_MEMORY memory allocation failed
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PCRE2_ERROR_NULL \fIcodes\fP or \fIbytes\fP is NULL
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.sp
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PCRE2_ERROR_BADMAGIC may mean that the data is corrupt, or that it was compiled
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on a system with different endianness.
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.P
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There is a complete description of the PCRE2 native API in the
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.\" HREF
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\fBpcre2api\fP
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.\"
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page and a description of the serialization functions in the
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.\" HREF
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\fBpcre2serialize\fP
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.\"
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page.
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