diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:15:05 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:15:05 +0000 |
commit | 46651ce6fe013220ed397add242004d764fc0153 (patch) | |
tree | 6e5299f990f88e60174a1d3ae6e48eedd2688b2b /src/backend/utils/mb/stringinfo_mb.c | |
parent | Initial commit. (diff) | |
download | postgresql-14-upstream.tar.xz postgresql-14-upstream.zip |
Adding upstream version 14.5.upstream/14.5upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/backend/utils/mb/stringinfo_mb.c')
-rw-r--r-- | src/backend/utils/mb/stringinfo_mb.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/src/backend/utils/mb/stringinfo_mb.c b/src/backend/utils/mb/stringinfo_mb.c new file mode 100644 index 0000000..1fd6c63 --- /dev/null +++ b/src/backend/utils/mb/stringinfo_mb.c @@ -0,0 +1,86 @@ +/*------------------------------------------------------------------------- + * + * stringinfo_mb.c + * Multibyte encoding-aware additional StringInfo facilities + * + * This is separate from common/stringinfo.c so that frontend users + * of that file need not pull in unnecessary multibyte-encoding support + * code. + * + * + * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group + * Portions Copyright (c) 1994, Regents of the University of California + * + * + * IDENTIFICATION + * src/backend/utils/mb/stringinfo_mb.c + * + *------------------------------------------------------------------------- + */ +#include "postgres.h" + +#include "mb/stringinfo_mb.h" +#include "mb/pg_wchar.h" + + +/* + * appendStringInfoStringQuoted + * + * Append up to maxlen bytes from s to str, or the whole input string if + * maxlen < 0, adding single quotes around it and doubling all single quotes. + * Add an ellipsis if the copy is incomplete. + */ +void +appendStringInfoStringQuoted(StringInfo str, const char *s, int maxlen) +{ + char *copy = NULL; + const char *chunk_search_start, + *chunk_copy_start, + *chunk_end; + int slen; + bool ellipsis; + + Assert(str != NULL); + + slen = strlen(s); + if (maxlen >= 0 && maxlen < slen) + { + int finallen = pg_mbcliplen(s, slen, maxlen); + + copy = pnstrdup(s, finallen); + chunk_search_start = copy; + chunk_copy_start = copy; + + ellipsis = true; + } + else + { + chunk_search_start = s; + chunk_copy_start = s; + + ellipsis = false; + } + + appendStringInfoCharMacro(str, '\''); + + while ((chunk_end = strchr(chunk_search_start, '\'')) != NULL) + { + /* copy including the found delimiting ' */ + appendBinaryStringInfoNT(str, + chunk_copy_start, + chunk_end - chunk_copy_start + 1); + + /* in order to double it, include this ' into the next chunk as well */ + chunk_copy_start = chunk_end; + chunk_search_start = chunk_end + 1; + } + + /* copy the last chunk and terminate */ + if (ellipsis) + appendStringInfo(str, "%s...'", chunk_copy_start); + else + appendStringInfo(str, "%s'", chunk_copy_start); + + if (copy) + pfree(copy); +} |