From 3a4838bed13b767132cbdf06364b2658da6cc356 Mon Sep 17 00:00:00 2001
From: chatty
Date: Tue, 15 Dec 1992 10:55:33 +0000
Subject: Initial revision

---
 utils/String.cc | 240 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 240 insertions(+)
 create mode 100644 utils/String.cc

(limited to 'utils/String.cc')

diff --git a/utils/String.cc b/utils/String.cc
new file mode 100644
index 0000000..3da5d7d
--- /dev/null
+++ b/utils/String.cc
@@ -0,0 +1,240 @@
+/*
+ *	CENA C++ Utilities
+ *
+ *	by Stephane Chatty
+ *
+ *	Copyright 1992
+ *	Centre d'Etudes de la Navigation Aerienne (CENA)
+ *
+ *	CcuString allocation and copying
+ *
+ *	$Id$
+ *	$CurLog$
+ */
+
+#include "String.h"
+#include <string.h>
+#include <stdlib.h>
+
+/*?
+\label{newstring}
+Allocate a string the same size as \var{s}, 
+copy \var{s} in it, and return the address. \var{s} must be a null-terminated string.
+If \var{s} is 0, return 0.
+?*/
+char* 
+NewString (const char* s)
+{
+	char* p;
+	
+	if (! s)
+		return 0;
+
+	p = new char [strlen (s) + 1];
+	strcpy (p, s);
+	return p;
+}
+
+
+/*?
+Allocate a string of \var{n} characters,
+copy the \var{n} first characters of \var{s} in it, 
+and return the address. The returned string is null terminated.
+If \var{s} is 0, return 0.
+?*/
+char*
+NewString (const char* s, int n)
+{
+	char* p;
+
+	if (! s)
+		return 0;
+	p = NewString (n);
+	if (! p)
+		return 0;
+	strncpy (p, s, n);
+	p [n] = 0;
+	return p;
+}
+
+/*?
+Allocate a string of \var{n} characters,
+and return its address. Actually, \var{n+1} characters are allocated, 
+to keep space for the terminating null character.
+If \var{n} is negative, return 0. Note that \fun{NewString}~\var{0} will allocate
+one character that will be able to hold an empty string.
+?*/
+char*
+NewString (int n)
+{
+	if (n < 0)
+		return 0;
+	
+	return new char [n+1];
+}
+
+
+/*?
+Free a string which has previously been 
+allocated with \fun{NewString}.
+If \var{s} is 0, do nothing.
+Please be careful: it is impossible to test whether \var{s} was really allocated with \fun{NewString}.
+?*/
+void
+FreeString (char* s)
+{
+	if (s)
+#ifdef CPLUS_BUG4
+		delete [strlen (s) + 1] s;
+#else
+		delete [] s;
+#endif
+}
+
+/*?class CcuString
+?*/
+
+#ifdef DOC
+/*?
+Build an empty \typ{CcuString}.
+?*/
+CcuString :: CcuString ()
+{
+}
+#endif
+
+/*?
+Build a \typ{CcuString} from \var{s}. \var{s} can be null.
+?*/
+CcuString :: CcuString (const char* s)
+{
+	Str = NewString (s);
+}
+
+/*?
+Create a \typ{CcuString} suitable for storing at most \var{n} characters, and
+initialize it to the null string.
+?*/
+CcuString :: CcuString (int n)
+{
+	Str = NewString (n);
+	*Str = '\0';
+}
+
+/*?
+Create a new \typ{CcuString} by copying \var{s}.
+?*/
+CcuString :: CcuString (const CcuString& s)
+{
+	Str = NewString (s);
+}
+
+/*?
+Create a new \typ{CcuString} by copying \var{s}.
+?*/
+CcuString :: CcuString (const CcuShadowString& s)
+{
+	Str = NewString (s);
+}
+
+/*?nodoc?*/
+CcuString :: ~CcuString ()
+{
+	if (Str)
+		FreeString (Str);
+}
+
+
+/*?
+Copy \var{s} into this string. The old string is freed.
+?*/
+CcuString&
+CcuString :: operator = (const CcuString& s)
+{
+	if (this != &s) {
+		FreeString (Str);
+		Str = NewString (s);
+	}
+	return *this;
+}
+
+CcuString&
+CcuString :: operator = (const char* s)
+{
+	if (Str != s) {
+		FreeString (Str);
+		Str = NewString (s);
+	}
+	return *this;
+}
+
+CcuString&
+CcuString :: operator = (const CcuShadowString& s)
+{
+	if (Str != (const char*) (s)) {
+		FreeString (Str);
+		Str = NewString (s);
+	}
+	return *this;
+}
+
+#ifdef DOC
+/*?
+Return the value of a string.
+?*/
+CcuString :: operator const char* () const
+{
+}
+#endif
+
+int
+CcuString :: Length () const
+{
+	return strlen (Str);
+}
+
+#ifdef DOC
+/*?
+Build an empty \typ{CcuShadowString}.
+?*/
+CcuShadowString :: CcuShadowString ()
+{
+	Str = 0;
+}
+#endif
+
+/*?
+?*/
+CcuShadowString :: CcuShadowString (const char* s)
+{
+	Str = s;
+}
+
+/*?
+Create a new \typ{CcuShadowString} by referencing \var{s}.
+?*/
+CcuShadowString :: CcuShadowString (const CcuString& s)
+{
+	Str = (const char*) s;
+}
+
+#ifdef DOC
+CcuShadowString&
+CcuShadowString :: operator = (const CcuString& s)
+{
+}
+
+CcuShadowString&
+CcuShadowString :: operator = (const char* s)
+{
+}
+
+/*?
+Return the value of a string.
+?*/
+CcuShadowString :: operator const char* () const
+{
+}
+#endif
+
+
-- 
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