Fix a possible segfault with vStringPut() - backported from CTags

5.7. This appears to fix a segfault on Windows 2000 when loading
tagmanager/c.c.
Also adds vStringChop() - chop last character from string.


git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/trunk@1920 ea778897-0a13-0410-b9d1-a72fbfd435f5

ChangeLog

@@ -11,6 +11,11 @@
    Add documentation for --no-preprocessing option.
  * src/keybindings.c:
    Add Project Properties menu accelerator.
+ * tagmanager/vstring.h, tagmanager/vstring.c:
+   Fix a possible segfault with vStringPut() - backported from CTags
+   5.7. This appears to fix a segfault on Windows 2000 when loading
+   tagmanager/c.c.
+   It also adds vStringChop() - chop last character from string.
 
 
 2007-09-27  Enrico Tröger  <enrico(dot)troeger(at)uvena(dot)de>

tagmanager/vstring.c

@@ -1,6 +1,6 @@
 /*
 *
-*   Copyright (c) 1998-2001, Darren Hiebert
+*   Copyright (c) 1998-2002, Darren Hiebert
 *
 *   This source code is released for free distribution under the terms of the
 *   GNU General Public License.
@@ -58,7 +58,7 @@ extern void vStringClear (vString *const string)
 {
     string->length = 0;
     string->buffer [0] = '\0';
-    DebugStatement ( clearString (string->buffer, string->size); )
+	DebugStatement ( memset (string->buffer, 0, string->size); )
 }
 
 extern void vStringDelete (vString *const string)
@@ -84,26 +84,35 @@ extern vString *vStringNew (void)
     return string;
 }
 
+#ifndef VSTRING_PUTC_MACRO
 extern void vStringPut (vString *const string, const int c)
 {
-    if (string->length == string->size)		/*  check for buffer overflow */
+	if (string->length + 1 == string->size)  /*  check for buffer overflow */
-	vStringAutoResize (string);
+		vStringAutoResize (string);
 
     string->buffer [string->length] = c;
     if (c != '\0')
-	string->length++;
+		string->buffer [++string->length] = '\0';
 }
+#endif
 
 extern void vStringCatS (vString *const string, const char *const s)
 {
+#if 1
+	const size_t len = strlen (s);
+	while (string->length + len + 1 >= string->size)/*  check for buffer overflow */
+		vStringAutoResize (string);
+	strcpy (string->buffer + string->length, s);
+	string->length += len;
+#else
     const char *p = s;
-
     do
-	vStringPut (string, *p);
+		vStringPut (string, *p);
     while (*p++ != '\0');
+#endif
 }
 
-extern vString *vStringNewCopy (vString *const string)
+extern vString *vStringNewCopy (const vString *const string)
 {
     vString *vs = vStringNew ();
     vStringCatS (vs, string->buffer);
@@ -117,8 +126,8 @@ extern vString *vStringNewInit (const char *const s)
     return vs;
 }
 
-extern void vStringNCatS (vString *const string, const char *const s,
+extern void vStringNCatS (
-			  const size_t length)
+		vString *const string, const char *const s, const size_t length)
 {
     const char *p = s;
     size_t remain = length;
@@ -170,20 +179,31 @@ extern void vStringStripTrailing (vString *const string)
     }
 }
 
+/*  Chop last character from string.
+ */
+extern void vStringChop (vString *const string)
+{
+	if (string->length > 0)
+	{
+		--string->length;
+		string->buffer [string->length] = '\0';
+	}
+}
+
 extern void vStringCopyS (vString *const string, const char *const s)
 {
     vStringClear (string);
     vStringCatS (string, s);
 }
 
-extern void vStringNCopyS (vString *const string, const char *const s,
+extern void vStringNCopyS (
-			   const size_t length)
+		vString *const string, const char *const s, const size_t length)
 {
     vStringClear (string);
     vStringNCatS (string, s, length);
 }
 
-extern void vStringCopyToLower (vString *const dest, vString *const src)
+extern void vStringCopyToLower (vString *const dest, const vString *const src)
 {
     const size_t length = src->length;
     const char *s = src->buffer;
@@ -207,4 +227,4 @@ extern void vStringSetLength (vString *const string)
     string->length = strlen (string->buffer);
 }
 
-/* vi:set tabstop=8 shiftwidth=4: */
+/* vi:set tabstop=4 shiftwidth=4: */

tagmanager/vstring.h

@@ -1,5 +1,5 @@
 /*
-*   Copyright (c) 1998-2001, Darren Hiebert
+*   Copyright (c) 1998-2002, Darren Hiebert
 *
 *   This source code is released for free distribution under the terms of the
 *   GNU General Public License.
@@ -21,6 +21,16 @@
 /*
 *   MACROS
 */
+#ifndef DEBUG
+# define VSTRING_PUTC_MACRO 1
+#endif
+#ifdef VSTRING_PUTC_MACRO
+#define vStringPut(s,c) \
+	(void)(((s)->length + 1 == (s)->size ? vStringAutoResize (s) : 0), \
+	((s)->buffer [(s)->length] = (c)), \
+	((c) == '\0' ? 0 : ((s)->buffer [++(s)->length] = '\0')))
+#endif
+
 #define vStringValue(vs)	((vs)->buffer)
 #define vStringItem(vs,i)	((vs)->buffer[i])
 #define vStringLength(vs)	((vs)->length)
@@ -51,19 +61,22 @@ extern boolean vStringAutoResize (vString *const string);
 extern void vStringClear (vString *const string);
 extern vString *vStringNew (void);
 extern void vStringDelete (vString *const string);
+#ifndef VSTRING_PUTC_MACRO
 extern void vStringPut (vString *const string, const int c);
+#endif
 extern void vStringStripNewline (vString *const string);
 extern void vStringStripLeading (vString *const string);
+extern void vStringChop (vString *const string);
 extern void vStringStripTrailing (vString *const string);
 extern void vStringCatS (vString *const string, const char *const s);
 extern void vStringNCatS (vString *const string, const char *const s, const size_t length);
-extern vString *vStringNewCopy (vString *const string);
+extern vString *vStringNewCopy (const vString *const string);
 extern vString *vStringNewInit (const char *const s);
 extern void vStringCopyS (vString *const string, const char *const s);
 extern void vStringNCopyS (vString *const string, const char *const s, const size_t length);
-extern void vStringCopyToLower (vString *const dest, vString *const src);
+extern void vStringCopyToLower (vString *const dest, const vString *const src);
 extern void vStringSetLength (vString *const string);
 
 #endif	/* _VSTRING_H */
 
-/* vi:set tabstop=8 shiftwidth=4: */
+/* vi:set tabstop=4 shiftwidth=4: */