1 files changed, 106 insertions, 0 deletions
diff --git a/rfc2045/rfc2045acprep.c b/rfc2045/rfc2045acprep.c
new file mode 100644
index 0000000..f3defa3
--- /dev/null
+++ b/rfc2045/rfc2045acprep.c
@@ -0,0 +1,106 @@
+/*
+** Copyright 1998 - 1999 Double Precision, Inc.  See COPYING for
+** distribution information.
+*/
+
+#include	"rfc2045.h"
+#include	<ctype.h>
+#include	<string.h>
+
+
+static void start_rwprep(struct rfc2045 *);
+static void do_rwprep(const char *, size_t);
+static void end_rwprep();
+
+static struct rfc2045ac rfc2045acprep={
+	&start_rwprep,
+	&do_rwprep,
+	&end_rwprep};
+
+static struct rfc2045 *currwp;
+static int curlinepos=0;
+
+typedef enum {
+	raw,
+	quotedprint,
+	qpseeneq,
+	qpseeneqh,
+	base64} state_t;
+
+static state_t curstate;
+static int statechar;
+
+#define	h2nyb(c) ( (c) >= 'a' && (c) <= 'f' ? (c)-('a'-10): \
+		   (c) >= 'A' && (c) <= 'F' ? (c)-('A'-10): (c)-'0')
+
+struct rfc2045 *rfc2045_alloc_ac()
+{
+struct rfc2045 *p=rfc2045_alloc();
+
+	if (p)	p->rfc2045acptr= &rfc2045acprep;
+	currwp=0;
+	return (p);
+}
+
+
+static void start_rwprep(struct rfc2045 *p)
+{
+	currwp=p;
+	curlinepos=0;
+	curstate=raw;
+	if (p->content_transfer_encoding)
+	{
+		if (strcmp(p->content_transfer_encoding,
+			"quoted-printable") == 0)
+			curstate=quotedprint;
+		else if (strcmp(p->content_transfer_encoding, "base64") == 0)
+			curstate=base64;
+	}
+}
+
+static void do_rwprep(const char * p, size_t n)
+{
+	if (!currwp)	return;
+	for ( ; n; --n, ++p)
+		switch (curstate)	{
+		case quotedprint:
+			if (*p == '=')
+			{
+				curstate=qpseeneq;
+				continue;
+			}
+			/* FALLTHRU */
+		case raw:
+			if (*p == '\r' || *p == '\n')
+				curlinepos=0;
+			else if (++curlinepos > 500)
+				currwp->haslongline=1;
+			if ((unsigned char)*p >= 127)
+				currwp->has8bitchars=1;
+			break;
+		case qpseeneq:
+			if (*p == '\n')
+			{
+				curstate=quotedprint;
+				continue;
+			}
+			if (isspace((int)(unsigned char)*p))	continue; /* Ignore WSP */
+			statechar=*p;
+			curstate=qpseeneqh;
+			continue;
+		case qpseeneqh:
+			curstate=quotedprint;
+			if ( (unsigned char)
+				( (h2nyb(statechar) << 4) + h2nyb(*p) ) >= 127
+				) currwp->has8bitchars=1;
+			if (++curlinepos > 500)
+				currwp->haslongline=1;
+			continue;
+		case base64:
+			break;
+		}
+}
+
+static void end_rwprep()
+{
+}