From 37da2899f40661e3e9631e497da8dc59b971cbd0 Mon Sep 17 00:00:00 2001
From: "Charles.Forsyth" <devnull@localhost>
Date: Fri, 22 Dec 2006 17:07:39 +0000
Subject: 20060303a

---
 lib9/tokenize.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 lib9/tokenize.c

(limited to 'lib9/tokenize.c')

diff --git a/lib9/tokenize.c b/lib9/tokenize.c
new file mode 100644
index 00000000..1b222c52
--- /dev/null
+++ b/lib9/tokenize.c
@@ -0,0 +1,58 @@
+#include "lib9.h"
+
+static char qsep[] = " \t\r\n";
+
+static char*
+qtoken(char *s)
+{
+	int quoting;
+	char *t;
+
+	quoting = 0;
+	t = s;	/* s is output string, t is input string */
+	while(*t!='\0' && (quoting || utfrune(qsep, *t)==nil)){
+		if(*t != '\''){
+			*s++ = *t++;
+			continue;
+		}
+		/* *t is a quote */
+		if(!quoting){
+			quoting = 1;
+			t++;
+			continue;
+		}
+		/* quoting and we're on a quote */
+		if(t[1] != '\''){
+			/* end of quoted section; absorb closing quote */
+			t++;
+			quoting = 0;
+			continue;
+		}
+		/* doubled quote; fold one quote into two */
+		t++;
+		*s++ = *t++;
+	}
+	if(*s != '\0'){
+		*s = '\0';
+		if(t == s)
+			t++;
+	}
+	return t;
+}
+
+int
+tokenize(char *s, char **args, int maxargs)
+{
+	int nargs;
+
+	for(nargs=0; nargs<maxargs; nargs++){
+		while(*s!='\0' && utfrune(qsep, *s)!=nil)
+			s++;
+		if(*s == '\0')
+			break;
+		args[nargs] = s;
+		s = qtoken(s);
+	}
+
+	return nargs;
+}
-- 
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