Adding upstream version 3.4.23.upstream/3.4.23upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 196 insertions, 0 deletions

diff --git a/src/global/xtext.c b/src/global/xtext.c
new file mode 100644
index 0000000..e0d3ed5
--- /dev/null
+++ b/src/global/xtext.c
@@ -0,0 +1,196 @@
+/*++
+/* NAME
+/*	xtext 3
+/* SUMMARY
+/*	quote/unquote text, xtext style.
+/* SYNOPSIS
+/*	#include <xtext.h>
+/*
+/*	VSTRING	*xtext_quote(quoted, unquoted, special)
+/*	VSTRING	*quoted;
+/*	const char *unquoted;
+/*	const char *special;
+/*
+/*	VSTRING	*xtext_quote_append(unquoted, quoted, special)
+/*	VSTRING	*unquoted;
+/*	const char *quoted;
+/*	const char *special;
+/*
+/*	VSTRING	*xtext_unquote(unquoted, quoted)
+/*	VSTRING	*unquoted;
+/*	const char *quoted;
+/*
+/*	VSTRING	*xtext_unquote_append(unquoted, quoted)
+/*	VSTRING	*unquoted;
+/*	const char *quoted;
+/* DESCRIPTION
+/*	xtext_quote() takes a null-terminated string and replaces characters
+/*	+, <33(10) and >126(10), as well as characters specified with "special"
+/*	by +XX, XX being the two-digit uppercase hexadecimal equivalent.
+/*
+/*	xtext_quote_append() is like xtext_quote(), but appends the conversion
+/*	result to the result buffer.
+/*
+/*	xtext_unquote() performs the opposite transformation. This function
+/*	understands lowercase, uppercase, and mixed case +XX sequences. The
+/*	result value is the unquoted argument in case of success, a null pointer
+/*	otherwise.
+/*
+/*	xtext_unquote_append() is like xtext_unquote(), but appends
+/*	the conversion result to the result buffer.
+/* BUGS
+/*	This module cannot process null characters in data.
+/* 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 <string.h>
+#include <ctype.h>
+
+/* Utility library. */
+
+#include "msg.h"
+#include "vstring.h"
+#include "xtext.h"
+
+/* Application-specific. */
+
+#define STR(x)	vstring_str(x)
+#define LEN(x)	VSTRING_LEN(x)
+
+/* xtext_quote_append - append unquoted data to quoted data */
+
+VSTRING *xtext_quote_append(VSTRING *quoted, const char *unquoted,
+			            const char *special)
+{
+    const char *cp;
+    int     ch;
+
+    for (cp = unquoted; (ch = *(unsigned const char *) cp) != 0; cp++) {
+	if (ch != '+' && ch > 32 && ch < 127
+	    && (*special == 0 || strchr(special, ch) == 0)) {
+	    VSTRING_ADDCH(quoted, ch);
+	} else {
+	    vstring_sprintf_append(quoted, "+%02X", ch);
+	}
+    }
+    VSTRING_TERMINATE(quoted);
+    return (quoted);
+}
+
+/* xtext_quote - unquoted data to quoted */
+
+VSTRING *xtext_quote(VSTRING *quoted, const char *unquoted, const char *special)
+{
+    VSTRING_RESET(quoted);
+    xtext_quote_append(quoted, unquoted, special);
+    return (quoted);
+}
+
+/* xtext_unquote_append - quoted data to unquoted */
+
+VSTRING *xtext_unquote_append(VSTRING *unquoted, const char *quoted)
+{
+    const unsigned char *cp;
+    int     ch;
+
+    for (cp = (const unsigned char *) quoted; (ch = *cp) != 0; cp++) {
+	if (ch == '+') {
+	    if (ISDIGIT(cp[1]))
+		ch = (cp[1] - '0') << 4;
+	    else if (cp[1] >= 'a' && cp[1] <= 'f')
+		ch = (cp[1] - 'a' + 10) << 4;
+	    else if (cp[1] >= 'A' && cp[1] <= 'F')
+		ch = (cp[1] - 'A' + 10) << 4;
+	    else
+		return (0);
+	    if (ISDIGIT(cp[2]))
+		ch |= (cp[2] - '0');
+	    else if (cp[2] >= 'a' && cp[2] <= 'f')
+		ch |= (cp[2] - 'a' + 10);
+	    else if (cp[2] >= 'A' && cp[2] <= 'F')
+		ch |= (cp[2] - 'A' + 10);
+	    else
+		return (0);
+	    cp += 2;
+	}
+	VSTRING_ADDCH(unquoted, ch);
+    }
+    VSTRING_TERMINATE(unquoted);
+    return (unquoted);
+}
+/* xtext_unquote - quoted data to unquoted */
+
+VSTRING *xtext_unquote(VSTRING *unquoted, const char *quoted)
+{
+    VSTRING_RESET(unquoted);
+    return (xtext_unquote_append(unquoted, quoted) ? unquoted : 0);
+}
+
+#ifdef TEST
+
+ /*
+  * Proof-of-concept test program: convert to quoted and back.
+  */
+#include <vstream.h>
+
+#define BUFLEN 1024
+
+static ssize_t read_buf(VSTREAM *fp, VSTRING *buf)
+{
+    ssize_t len;
+
+    len = vstream_fread_buf(fp, buf, BUFLEN);
+    VSTRING_TERMINATE(buf);
+    return (len);
+}
+
+int     main(int unused_argc, char **unused_argv)
+{
+    VSTRING *unquoted = vstring_alloc(BUFLEN);
+    VSTRING *quoted = vstring_alloc(100);
+    ssize_t len;
+
+    /*
+     * Negative tests.
+     */
+    if (xtext_unquote(unquoted, "++1") != 0)
+	msg_warn("undetected error pattern 1");
+    if (xtext_unquote(unquoted, "+2+") != 0)
+	msg_warn("undetected error pattern 2");
+
+    /*
+     * Positive tests.
+     */
+    while ((len = read_buf(VSTREAM_IN, unquoted)) > 0) {
+	xtext_quote(quoted, STR(unquoted), "+=");
+	if (xtext_unquote(unquoted, STR(quoted)) == 0)
+	    msg_fatal("bad input: %.100s", STR(quoted));
+	if (LEN(unquoted) != len)
+	    msg_fatal("len %ld != unquoted len %ld",
+		      (long) len, (long) LEN(unquoted));
+	if (vstream_fwrite(VSTREAM_OUT, STR(unquoted), LEN(unquoted)) != LEN(unquoted))
+	    msg_fatal("write error: %m");
+    }
+    vstream_fflush(VSTREAM_OUT);
+    vstring_free(unquoted);
+    vstring_free(quoted);
+    return (0);
+}
+
+#endif