1 files changed, 114 insertions, 0 deletions
diff --git a/src/postconf/postconf_print.c b/src/postconf/postconf_print.c
new file mode 100644
index 0000000..32c4015
--- /dev/null
+++ b/src/postconf/postconf_print.c
@@ -0,0 +1,114 @@
+/*++
+/* NAME
+/*	postconf_print 3
+/* SUMMARY
+/*	basic line printing support
+/* SYNOPSIS
+/*	#include <postconf.h>
+/*
+/*	void	pcf_print_line(fp, mode, const char *fmt, ...)
+/*	VSTREAM	*fp;
+/*	int	mode;
+/*	const char *fmt;
+/* DESCRIPTION
+/*	pcf_print_line() formats text, normalized whitespace, and
+/*	optionally folds long lines.
+/*
+/*	Arguments:
+/* .IP fp
+/*	Output stream.
+/* .IP mode
+/*	Bit-wise OR of zero or more of the following (other flags
+/*	are ignored):
+/* .RS
+/* .IP PCF_FOLD_LINE
+/*	Fold long lines.
+/* .RE
+/* .IP fmt
+/*	Format string.
+/* DIAGNOSTICS
+/*	Problems are reported to the standard error stream.
+/* 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>
+#include <stdarg.h>
+
+/* Utility library. */
+
+#include <msg.h>
+#include <vstream.h>
+#include <vstring.h>
+
+/* Application-specific. */
+
+#include <postconf.h>
+
+/* SLMs. */
+
+#define STR(x)	vstring_str(x)
+
+/* pcf_print_line - show line possibly folded, and with normalized whitespace */
+
+void    pcf_print_line(VSTREAM *fp, int mode, const char *fmt,...)
+{
+    va_list ap;
+    static VSTRING *buf = 0;
+    char   *start;
+    char   *next;
+    int     line_len = 0;
+    int     word_len;
+
+    /*
+     * One-off initialization.
+     */
+    if (buf == 0)
+	buf = vstring_alloc(100);
+
+    /*
+     * Format the text.
+     */
+    va_start(ap, fmt);
+    vstring_vsprintf(buf, fmt, ap);
+    va_end(ap);
+
+    /*
+     * Normalize the whitespace. We don't use the line_wrap() routine because
+     * 1) that function does not normalize whitespace between words and 2) we
+     * want to normalize whitespace even when not wrapping lines.
+     * 
+     * XXX Some parameters preserve whitespace: for example, smtpd_banner and
+     * smtpd_reject_footer. If we have to preserve whitespace between words,
+     * then perhaps readlline() can be changed to canonicalize whitespace
+     * that follows a newline.
+     */
+    for (start = STR(buf); *(start += strspn(start, PCF_SEPARATORS)) != 0; start = next) {
+	word_len = strcspn(start, PCF_SEPARATORS);
+	if (*(next = start + word_len) != 0)
+	    *next++ = 0;
+	if (word_len > 0 && line_len > 0) {
+	    if ((mode & PCF_FOLD_LINE) == 0
+		|| line_len + word_len < PCF_LINE_LIMIT) {
+		vstream_fputs(" ", fp);
+		line_len += 1;
+	    } else {
+		vstream_fputs("\n" PCF_INDENT_TEXT, fp);
+		line_len = PCF_INDENT_LEN;
+	    }
+	}
+	vstream_fputs(start, fp);
+	line_len += word_len;
+    }
+    vstream_fputs("\n", fp);
+}