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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 12:06:34 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 12:06:34 +0000 |
commit | 5e61585d76ae77fd5e9e96ebabb57afa4d74880d (patch) | |
tree | 2b467823aaeebc7ef8bc9e3cabe8074eaef1666d /src/util/printable.c | |
parent | Initial commit. (diff) | |
download | postfix-5e61585d76ae77fd5e9e96ebabb57afa4d74880d.tar.xz postfix-5e61585d76ae77fd5e9e96ebabb57afa4d74880d.zip |
Adding upstream version 3.5.24.upstream/3.5.24upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/util/printable.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/src/util/printable.c b/src/util/printable.c new file mode 100644 index 0000000..6c148fd --- /dev/null +++ b/src/util/printable.c @@ -0,0 +1,100 @@ +/*++ +/* NAME +/* printable 3 +/* SUMMARY +/* mask non-printable characters +/* SYNOPSIS +/* #include <stringops.h> +/* +/* int util_utf8_enable; +/* +/* char *printable(buffer, replacement) +/* char *buffer; +/* int replacement; +/* +/* char *printable_except(buffer, replacement, except) +/* char *buffer; +/* int replacement; +/* const char *except; +/* DESCRIPTION +/* printable() replaces non-printable characters +/* in its input with the given replacement. +/* +/* util_utf8_enable controls whether UTF8 is considered printable. +/* With util_utf8_enable equal to zero, non-ASCII text is replaced. +/* +/* Arguments: +/* .IP buffer +/* The null-terminated input string. +/* .IP replacement +/* Replacement value for characters in \fIbuffer\fR that do not +/* pass the ASCII isprint(3) test or that are not valid UTF8. +/* .IP except +/* Null-terminated sequence of non-replaced ASCII characters. +/* LICENSE +/* .ad +/* .fi +/* The Secure Mailer license must be distributed with this software. +/* AUTHOR(S) +/* Wietse Venema +/* IBM T.J. Watson Research +/* P.O. Box 704 +/* Yorktown Heights, NY 10598, USA +/* +/* Wietse Venema +/* Google, Inc. +/* 111 8th Avenue +/* New York, NY 10011, USA +/*--*/ + +/* System library. */ + +#include "sys_defs.h" +#include <ctype.h> +#include <string.h> + +/* Utility library. */ + +#include "stringops.h" + +int util_utf8_enable = 0; + +/* printable - binary compatibility */ + +#undef printable + +char *printable(char *, int); + +char *printable(char *string, int replacement) +{ + return (printable_except(string, replacement, (char *) 0)); +} + +/* printable_except - pass through printable or other preserved characters */ + +char *printable_except(char *string, int replacement, const char *except) +{ + unsigned char *cp; + int ch; + + /* + * XXX Replace invalid UTF8 sequences (too short, over-long encodings, + * out-of-range code points, etc). See valid_utf8_string.c. + */ + cp = (unsigned char *) string; + while ((ch = *cp) != 0) { + if (ISASCII(ch) && (ISPRINT(ch) || (except && strchr(except, ch)))) { + /* ok */ + } else if (util_utf8_enable && ch >= 194 && ch <= 254 + && cp[1] >= 128 && cp[1] < 192) { + /* UTF8; skip the rest of the bytes in the character. */ + while (cp[1] >= 128 && cp[1] < 192) + cp++; + } else { + /* Not ASCII and not UTF8. */ + *cp = replacement; + } + cp++; + } + return (string); +} |