From 6094a21e5e20c1a3a6a859a40219db59c6f77482 Mon Sep 17 00:00:00 2001
From: hyung-hwan <hyunghwan.chung@gmail.com>
Date: Thu, 2 Sep 2010 07:19:59 +0000
Subject: [PATCH] added a few string functions

---
 qse/include/qse/cmn/str.h | 32 +++++++++++++++++--
 qse/lib/cmn/str_bas.c     | 65 ++++++++++++++++++++++++++++++++++++++-
 2 files changed, 94 insertions(+), 3 deletions(-)

diff --git a/qse/include/qse/cmn/str.h b/qse/include/qse/cmn/str.h
index c1b9900d..a70b16f1 100644
--- a/qse/include/qse/cmn/str.h
+++ b/qse/include/qse/cmn/str.h
@@ -1,5 +1,5 @@
 /*
- * $Id: str.h 341 2010-08-04 07:25:48Z hyunghwan.chung $
+ * $Id: str.h 353 2010-09-01 13:19:59Z hyunghwan.chung $
  *
     Copyright 2006-2009 Chung, Hyung-Hwan.
     This file is part of QSE.
@@ -319,7 +319,16 @@ int qse_strxncmp (
 	qse_size_t len2
 );
 
-int qse_strcasecmp (const qse_char_t* s1, const qse_char_t* s2);
+int qse_strcasecmp (
+	const qse_char_t* s1,
+	const qse_char_t* s2
+);
+
+int qse_strxcasecmp (
+	const qse_char_t* s1,
+	qse_size_t        len,
+	const qse_char_t* s2
+);
 
 /**
  * The qse_strxncasecmp() function compares characters at the same position 
@@ -461,6 +470,25 @@ qse_char_t* qse_strxrchr (
 	qse_cint_t c
 );
 
+/**
+ * The qse_strxword() function finds a whole word in a string.
+ */
+const qse_char_t* qse_strxword (
+     const qse_char_t* str,
+	qse_size_t        len,
+	const qse_char_t* word
+);
+
+/**
+ * The qse_strxcaseword() function finds a whole word in a string 
+ * case-insensitively.
+ */
+const qse_char_t* qse_strxcaseword (
+     const qse_char_t* str,
+	qse_size_t        len,
+	const qse_char_t* word
+);
+
 /**
  * The qse_strbeg() function checks if the a string begins with a substring.
  * @return the pointer to a beginning of a matching beginning, 
diff --git a/qse/lib/cmn/str_bas.c b/qse/lib/cmn/str_bas.c
index b88f4545..9a2ead3b 100644
--- a/qse/lib/cmn/str_bas.c
+++ b/qse/lib/cmn/str_bas.c
@@ -1,5 +1,5 @@
 /*
- * $Id: str_bas.c 326 2010-05-09 13:44:39Z hyunghwan.chung $
+ * $Id: str_bas.c 353 2010-09-01 13:19:59Z hyunghwan.chung $
  *
     Copyright 2006-2009 Chung, Hyung-Hwan.
     This file is part of QSE.
@@ -544,6 +544,22 @@ int qse_strcasecmp (const qse_char_t* s1, const qse_char_t* s2)
 	return (QSE_TOUPPER(*s1) > QSE_TOUPPER(*s2))? 1: -1;
 }
 
+int qse_strxcasecmp (const qse_char_t* s1, qse_size_t len, const qse_char_t* s2)
+{
+	qse_char_t c1, c2;
+	const qse_char_t* end = s1 + len;
+
+	c1 = QSE_TOUPPER(*s1); c2 = QSE_TOUPPER(*s2);
+	while (s1 < end && c2 != QSE_T('\0') && c1 == c2) 
+	{
+		s1++; s2++;
+		c1 = QSE_TOUPPER(*s1); c2 = QSE_TOUPPER(*s2);
+	}
+	if (s1 == end && c2 == QSE_T('\0')) return 0;
+	if (c1 == c2) return (s1 < end)? 1: -1;
+	return (c1 > c2)? 1: -1;
+}
+
 int qse_strxncasecmp (
 	const qse_char_t* s1, qse_size_t len1, 
 	const qse_char_t* s2, qse_size_t len2)
@@ -836,6 +852,53 @@ qse_char_t* qse_strxrchr (const qse_char_t* str, qse_size_t len, qse_cint_t c)
 	return QSE_NULL;
 }
 
+const qse_char_t* qse_strxword (
+	const qse_char_t* str, qse_size_t len, const qse_char_t* word)
+{
+	/* find a full word in a string */
+
+	const qse_char_t* ptr = str;
+	const qse_char_t* end = str + len;
+	const qse_char_t* s;
+
+	do
+	{
+		while (ptr < end && QSE_ISSPACE(*ptr)) ptr++;
+		if (ptr >= end) return QSE_NULL;
+
+		s = ptr;
+		while (ptr < end && !QSE_ISSPACE(*ptr)) ptr++;
+
+		if (qse_strxcmp (s, ptr-s, word) == 0) return s;
+	}
+	while (ptr < end);
+
+	return QSE_NULL;
+}
+
+const qse_char_t* qse_strxcaseword (
+	const qse_char_t* str, qse_size_t len, const qse_char_t* word)
+{
+	const qse_char_t* ptr = str;
+	const qse_char_t* end = str + len;
+	const qse_char_t* s;
+
+	do
+	{
+		while (ptr < end && QSE_ISSPACE(*ptr)) ptr++;
+		if (ptr >= end) return QSE_NULL;
+
+		s = ptr;
+		while (ptr < end && !QSE_ISSPACE(*ptr)) ptr++;
+
+		if (qse_strxcasecmp (s, ptr-s, word) == 0) return s;
+	}
+	while (ptr < end);
+
+	return QSE_NULL;
+}
+
+
 qse_char_t* qse_strbeg (const qse_char_t* str, const qse_char_t* sub)
 {
 	while (*sub != QSE_T('\0'))