util: add missing string->integer conversion functions

It was awkward having only int conversion in the virStrToLong family,
but only long conversion in the virXPath family.  Make both families
support both types.

* src/util/util.h (virStrToLong_l, virStrToLong_ul): New
prototypes.
* src/util/xml.h (virXPathInt, virXPathUInt): Likewise.
* src/util/util.c (virStrToLong_l, virStrToLong_ul): New
functions.
* src/util/xml.c (virXPathInt, virXPathUInt): Likewise.
* src/libvirt_private.syms (util.h, xml.h): Export them.

src/libvirt_private.syms

@@ -886,8 +886,10 @@ virSetUIDGID;
 virSkipSpaces;
 virStrToDouble;
 virStrToLong_i;
+virStrToLong_l;
 virStrToLong_ll;
 virStrToLong_ui;
+virStrToLong_ul;
 virStrToLong_ull;
 virStrcpy;
 virStrncpy;
@@ -926,6 +928,7 @@ virStrerror;
 # xml.h
 virXMLPropString;
 virXPathBoolean;
+virXPathInt;
 virXPathLong;
 virXPathLongHex;
 virXPathLongLong;
@@ -934,6 +937,7 @@ virXPathNodeSet;
 virXPathNumber;
 virXPathString;
 virXPathStringLimit;
+virXPathUInt;
 virXPathULong;
 virXPathULongHex;
 virXPathULongLong;

src/util/util.c

@@ -2081,7 +2081,45 @@ virStrToLong_ui(char const *s, char **end_ptr, int base, unsigned int *result)
     return 0;
 }
 
-/* Just like virStrToLong_i, above, but produce an "long long" value.  */
+/* Just like virStrToLong_i, above, but produce a "long" value.  */
+int
+virStrToLong_l(char const *s, char **end_ptr, int base, long *result)
+{
+    long int val;
+    char *p;
+    int err;
+
+    errno = 0;
+    val = strtol(s, &p, base);
+    err = (errno || (!end_ptr && *p) || p == s);
+    if (end_ptr)
+        *end_ptr = p;
+    if (err)
+        return -1;
+    *result = val;
+    return 0;
+}
+
+/* Just like virStrToLong_i, above, but produce an "unsigned long" value.  */
+int
+virStrToLong_ul(char const *s, char **end_ptr, int base, unsigned long *result)
+{
+    unsigned long int val;
+    char *p;
+    int err;
+
+    errno = 0;
+    val = strtoul(s, &p, base);
+    err = (errno || (!end_ptr && *p) || p == s);
+    if (end_ptr)
+        *end_ptr = p;
+    if (err)
+        return -1;
+    *result = val;
+    return 0;
+}
+
+/* Just like virStrToLong_i, above, but produce a "long long" value.  */
 int
 virStrToLong_ll(char const *s, char **end_ptr, int base, long long *result)
 {

src/util/util.h

@@ -188,6 +188,14 @@ int virStrToLong_ui(char const *s,
                     char **end_ptr,
                     int base,
                     unsigned int *result);
+int virStrToLong_l(char const *s,
+                   char **end_ptr,
+                   int base,
+                   long *result);
+int virStrToLong_ul(char const *s,
+                    char **end_ptr,
+                    int base,
+                    unsigned long *result);
 int virStrToLong_ll(char const *s,
                     char **end_ptr,
                     int base,

src/util/xml.c

@@ -1,7 +1,7 @@
 /*
  * xml.c: XML based interfaces for the libvir library
  *
- * Copyright (C) 2005, 2007-2010 Red Hat, Inc.
+ * Copyright (C) 2005, 2007-2011 Red Hat, Inc.
  *
  * See COPYING.LIB for the License of this software
  *
@@ -194,6 +194,35 @@ virXPathLongBase(const char *xpath,
     return (ret);
 }
 
+/**
+ * virXPathInt:
+ * @xpath: the XPath string to evaluate
+ * @ctxt: an XPath context
+ * @value: the returned int value
+ *
+ * Convenience function to evaluate an XPath number
+ *
+ * Returns 0 in case of success in which case @value is set,
+ *         or -1 if the XPath evaluation failed or -2 if the
+ *         value doesn't have an int format.
+ */
+int
+virXPathInt(const char *xpath,
+            xmlXPathContextPtr ctxt,
+            int *value)
+{
+    long tmp;
+    int ret;
+
+    ret = virXPathLongBase(xpath, ctxt, 10, &tmp);
+    if (ret < 0)
+        return ret;
+    if ((int) tmp != tmp)
+        return -2;
+    *value = tmp;
+    return 0;
+}
+
 /**
  * virXPathLong:
  * @xpath: the XPath string to evaluate
@@ -278,6 +307,35 @@ virXPathULongBase(const char *xpath,
     return (ret);
 }
 
+/**
+ * virXPathUInt:
+ * @xpath: the XPath string to evaluate
+ * @ctxt: an XPath context
+ * @value: the returned int value
+ *
+ * Convenience function to evaluate an XPath number
+ *
+ * Returns 0 in case of success in which case @value is set,
+ *         or -1 if the XPath evaluation failed or -2 if the
+ *         value doesn't have an int format.
+ */
+int
+virXPathUInt(const char *xpath,
+             xmlXPathContextPtr ctxt,
+             unsigned int *value)
+{
+    unsigned long tmp;
+    int ret;
+
+    ret = virXPathULongBase(xpath, ctxt, 10, &tmp);
+    if (ret < 0)
+        return ret;
+    if ((unsigned int) tmp != tmp)
+        return -2;
+    *value = tmp;
+    return 0;
+}
+
 /**
  * virXPathULong:
  * @xpath: the XPath string to evaluate

src/util/xml.h

@@ -21,19 +21,25 @@ char *       virXPathStringLimit(const char *xpath,
 int               virXPathNumber(const char *xpath,
                                  xmlXPathContextPtr ctxt,
                                  double *value);
+int                  virXPathInt(const char *xpath,
+                                 xmlXPathContextPtr ctxt,
+                                 int *value);
+int                 virXPathUInt(const char *xpath,
+                                 xmlXPathContextPtr ctxt,
+                                 unsigned int *value);
 int                 virXPathLong(const char *xpath,
                                  xmlXPathContextPtr ctxt,
                                  long *value);
-int                 virXPathULong(const char *xpath,
+int                virXPathULong(const char *xpath,
                                  xmlXPathContextPtr ctxt,
                                  unsigned long *value);
 int            virXPathULongLong(const char *xpath,
                                  xmlXPathContextPtr ctxt,
                                  unsigned long long *value);
-int	        virXPathLongLong(const char *xpath,
+int             virXPathLongLong(const char *xpath,
                                  xmlXPathContextPtr ctxt,
                                  long long *value);
-int		virXPathLongHex	(const char *xpath,
+int              virXPathLongHex(const char *xpath,
                                  xmlXPathContextPtr ctxt,
                                  long *value);
 int             virXPathULongHex(const char *xpath,