1 files changed, 97 insertions, 0 deletions
diff --git a/src/util/split_nameval.c b/src/util/split_nameval.c
new file mode 100644
index 0000000..da74fcf
--- /dev/null
+++ b/src/util/split_nameval.c
@@ -0,0 +1,97 @@
+/*++
+/* NAME
+/*	split_nameval 3
+/* SUMMARY
+/*	name-value splitter
+/* SYNOPSIS
+/*	#include <split_nameval.h>
+/*
+/*	const char *split_nameval(buf, name, value)
+/*	char	*buf;
+/*	char	**name;
+/*	char	**value;
+/* DESCRIPTION
+/*	split_nameval() takes a logical line from readlline() and expects
+/*	text of the form "name = value" or "name =". The buffer
+/*	argument is broken up into name and value substrings.
+/*
+/*	Arguments:
+/* .IP buf
+/*	Result from readlline() or equivalent. The buffer is modified.
+/* .IP name
+/*	Upon successful completion, this is set to the name
+/*	substring.
+/* .IP value
+/*	Upon successful completion, this is set to the value
+/*	substring.
+/* FEATURES
+/* SEE ALSO
+/*	dict(3) mid-level dictionary routines
+/* BUGS
+/* DIAGNOSTICS
+/*	Fatal errors: out of memory.
+/*
+/*	The result is a null pointer in case of success, a string
+/*	describing the error otherwise: missing '=' after attribute
+/*	name; missing attribute name.
+/* 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 libraries. */
+
+#include "sys_defs.h"
+#include <ctype.h>
+#include <string.h>
+
+/* Utility library. */
+
+#include <msg.h>
+#include <stringops.h>
+
+/* split_nameval - split text into name and value */
+
+const char *split_nameval(char *buf, char **name, char **value)
+{
+    char   *np;				/* name substring */
+    char   *vp;				/* value substring */
+    char   *cp;
+    char   *ep;
+
+    /*
+     * Ugly macros to make complex expressions less unreadable.
+     */
+#define SKIP(start, var, cond) do { \
+	for (var = start; *var && (cond); var++) \
+	    /* void */; \
+    } while (0)
+
+#define TRIM(s) do { \
+	char *p; \
+	for (p = (s) + strlen(s); p > (s) && ISSPACE(p[-1]); p--) \
+	    /* void */; \
+	*p = 0; \
+    } while (0)
+
+    SKIP(buf, np, ISSPACE(*np));		/* find name begin */
+    if (*np == 0 || *np == '=')
+	return ("missing attribute name");
+    SKIP(np, ep, !ISSPACE(*ep) && *ep != '=');	/* find name end */
+    SKIP(ep, cp, ISSPACE(*cp));			/* skip blanks before '=' */
+    if (*cp != '=')				/* need '=' */
+	return ("missing '=' after attribute name");
+    *ep = 0;					/* terminate name */
+    cp++;					/* skip over '=' */
+    SKIP(cp, vp, ISSPACE(*vp));			/* skip leading blanks */
+    TRIM(vp);					/* trim trailing blanks */
+    *name = np;
+    *value = vp;
+    return (0);
+}