From b5896ba9f6047e7031e2bdee0622d543e11a6734 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Mon, 6 May 2024 03:46:30 +0200
Subject: Adding upstream version 3.4.23.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/global/fold_addr.c | 172 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 172 insertions(+)
 create mode 100644 src/global/fold_addr.c

(limited to 'src/global/fold_addr.c')

diff --git a/src/global/fold_addr.c b/src/global/fold_addr.c
new file mode 100644
index 0000000..86ee7b5
--- /dev/null
+++ b/src/global/fold_addr.c
@@ -0,0 +1,172 @@
+/*++
+/* NAME
+/*	fold_addr 3
+/* SUMMARY
+/*	address case folding
+/* SYNOPSIS
+/*	#include <fold_addr.h>
+/*
+/*	char	*fold_addr(result, addr, flags)
+/*	VSTRING *result;
+/*	const char *addr;
+/*	int	flags;
+/* DESCRIPTION
+/*	fold_addr() case folds an address according to the options
+/*	specified with \fIflags\fR. The result value is the output
+/*	address.
+/*
+/*	Arguments
+/* .IP result
+/*	Result buffer with the output address. Note: casefolding
+/*	may change the string length.
+/* .IP addr
+/*	Null-terminated read-only string with the input address.
+/* .IP flags
+/*	Zero or the bit-wise OR of:
+/* .RS
+/* .IP FOLD_ADDR_USER
+/*	Case fold the address local part.
+/* .IP FOLD_ADDR_HOST
+/*	Case fold the address domain part.
+/* .IP FOLD_ADDR_ALL
+/*	Alias for (FOLD_ADDR_USER | FOLD_ADDR_HOST).
+/* .RE
+/* SEE ALSO
+/*	msg(3) diagnostics interface
+/*	casefold(3) casefold text
+/* DIAGNOSTICS
+/*	Fatal errors: memory allocation problem.
+/* 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
+/*--*/
+
+/* System library. */
+
+#include <sys_defs.h>
+#include <string.h>
+
+/* Utility library. */
+
+#include <stringops.h>
+
+/* Global library. */
+
+#include <fold_addr.h>
+
+#define STR(x)	vstring_str(x)
+
+/* fold_addr - case fold mail address */
+
+char   *fold_addr(VSTRING *result, const char *addr, int flags)
+{
+    char   *cp;
+
+    /*
+     * Fold the address as appropriate.
+     */
+    switch (flags & FOLD_ADDR_ALL) {
+    case FOLD_ADDR_HOST:
+	if ((cp = strrchr(addr, '@')) != 0) {
+	    cp += 1;
+	    vstring_strncpy(result, addr, cp - addr);
+	    casefold_append(result, cp);
+	    break;
+	}
+	/* FALLTHROUGH */
+    case 0:
+	vstring_strcpy(result, addr);
+	break;
+    case FOLD_ADDR_USER:
+	if ((cp = strrchr(addr, '@')) != 0) {
+	    casefold_len(result, addr, cp - addr);
+	    vstring_strcat(result, cp);
+	    break;
+	}
+	/* FALLTHROUGH */
+    case FOLD_ADDR_USER | FOLD_ADDR_HOST:
+	casefold(result, addr);
+	break;
+    }
+    return (STR(result));
+}
+
+#ifdef TEST
+#include <stdlib.h>
+#include <vstream.h>
+#include <vstring_vstream.h>
+#include <msg_vstream.h>
+#include <argv.h>
+
+int     main(int argc, char **argv)
+{
+    VSTRING *line_buffer = vstring_alloc(1);
+    VSTRING *fold_buffer = vstring_alloc(1);
+    ARGV   *cmd;
+    char  **args;
+
+    msg_vstream_init(argv[0], VSTREAM_ERR);
+    util_utf8_enable = 1;
+    while (vstring_fgets_nonl(line_buffer, VSTREAM_IN)) {
+	vstream_printf("> %s\n", STR(line_buffer));
+	cmd = argv_split(STR(line_buffer), CHARS_SPACE);
+	if (cmd->argc == 0 || cmd->argv[0][0] == '#') {
+	    argv_free(cmd);
+	    continue;
+	}
+	args = cmd->argv;
+
+	/*
+	 * Fold the host.
+	 */
+	if (strcmp(args[0], "host") == 0 && cmd->argc == 2) {
+	    vstream_printf("\"%s\" -> \"%s\"\n", args[1], fold_addr(fold_buffer,
+						  args[1], FOLD_ADDR_HOST));
+	}
+
+	/*
+	 * Fold the user.
+	 */
+	else if (strcmp(args[0], "user") == 0 && cmd->argc == 2) {
+	    vstream_printf("\"%s\" -> \"%s\"\n", args[1], fold_addr(fold_buffer,
+						  args[1], FOLD_ADDR_USER));
+	}
+
+	/*
+	 * Fold user and host.
+	 */
+	else if (strcmp(args[0], "all") == 0 && cmd->argc == 2) {
+	    vstream_printf("\"%s\" -> \"%s\"\n", args[1], fold_addr(fold_buffer,
+						   args[1], FOLD_ADDR_ALL));
+	}
+
+	/*
+	 * Fold none.
+	 */
+	else if (strcmp(args[0], "none") == 0 && cmd->argc == 2) {
+	    vstream_printf("\"%s\" -> \"%s\"\n", args[1], fold_addr(fold_buffer,
+							       args[1], 0));
+	}
+
+	/*
+	 * Usage.
+	 */
+	else {
+	    vstream_printf("Usage: %s host <addr> | user <addr> | all <addr>\n",
+			   argv[0]);
+	}
+	vstream_fflush(VSTREAM_OUT);
+	argv_free(cmd);
+    }
+    vstring_free(line_buffer);
+    vstring_free(fold_buffer);
+    exit(0);
+}
+
+#endif					/* TEST */
-- 
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