diff options
Diffstat (limited to 'thirdparty/pcre2/src/pcre2_substitute.c')
| -rw-r--r-- | thirdparty/pcre2/src/pcre2_substitute.c | 29 |
1 files changed, 24 insertions, 5 deletions
diff --git a/thirdparty/pcre2/src/pcre2_substitute.c b/thirdparty/pcre2/src/pcre2_substitute.c index 981a106a9f..8b2c369ccc 100644 --- a/thirdparty/pcre2/src/pcre2_substitute.c +++ b/thirdparty/pcre2/src/pcre2_substitute.c @@ -7,7 +7,7 @@ and semantics are as close as possible to those of the Perl 5 language. Written by Philip Hazel Original API code Copyright (c) 1997-2012 University of Cambridge - New API code Copyright (c) 2016-2020 University of Cambridge + New API code Copyright (c) 2016-2021 University of Cambridge ----------------------------------------------------------------------------- Redistribution and use in source and binary forms, with or without @@ -259,6 +259,18 @@ PCRE2_UNSET, so as not to imply an offset in the replacement. */ if ((options & (PCRE2_PARTIAL_HARD|PCRE2_PARTIAL_SOFT)) != 0) return PCRE2_ERROR_BADOPTION; + +/* Validate length and find the end of the replacement. A NULL replacement of +zero length is interpreted as an empty string. */ + +if (replacement == NULL) + { + if (rlength != 0) return PCRE2_ERROR_NULL; + replacement = (PCRE2_SPTR)""; + } + +if (rlength == PCRE2_ZERO_TERMINATED) rlength = PRIV(strlen)(replacement); +repend = replacement + rlength; /* Check for using a match that has already happened. Note that the subject pointer in the match data may be NULL after a no-match. */ @@ -312,11 +324,18 @@ scb.input = subject; scb.output = (PCRE2_SPTR)buffer; scb.ovector = ovector; -/* Find lengths of zero-terminated strings and the end of the replacement. */ +/* A NULL subject of zero length is treated as an empty string. */ -if (length == PCRE2_ZERO_TERMINATED) length = PRIV(strlen)(subject); -if (rlength == PCRE2_ZERO_TERMINATED) rlength = PRIV(strlen)(replacement); -repend = replacement + rlength; +if (subject == NULL) + { + if (length != 0) return PCRE2_ERROR_NULL; + subject = (PCRE2_SPTR)""; + } + +/* Find length of zero-terminated subject */ + +if (length == PCRE2_ZERO_TERMINATED) + length = subject? PRIV(strlen)(subject) : 0; /* Check UTF replacement string if necessary. */ |