[libgxps] Add gxps_value_get_double_positive() to parse positive real numbers

[Carlos Garcia Campos <carlosgc src gnome org>]

commit 45f5bb25dd38e6241ecd6d3e2daa78e6dd0fb585
Author: Carlos Garcia Campos <carlosgc gnome org>
Date:   Sun Nov 6 12:47:19 2011 +0100

    Add gxps_value_get_double_positive() to parse positive real numbers
    
    It's the same than gxps_value_get_double() but this one fails if the
    parsed number is not greater or equal than 1.

 libgxps/gxps-parse-utils.c |   10 ++++++++++
 libgxps/gxps-parse-utils.h |   34 ++++++++++++++++++----------------
 2 files changed, 28 insertions(+), 16 deletions(-)
---
diff --git a/libgxps/gxps-parse-utils.c b/libgxps/gxps-parse-utils.c
index 23d048b..b509ee3 100644
--- a/libgxps/gxps-parse-utils.c
+++ b/libgxps/gxps-parse-utils.c
@@ -292,6 +292,16 @@ gxps_value_get_double (const gchar *value,
         return TRUE;
 }
 
+gboolean
+gxps_value_get_double_positive (const gchar *value,
+                                gdouble     *double_value)
+{
+        if (!gxps_value_get_double (value, double_value))
+                return FALSE;
+
+        return *double_value >= 1;
+}
+
 gchar *
 gxps_resolve_relative_path (const gchar *source,
 			    const gchar *target)
diff --git a/libgxps/gxps-parse-utils.h b/libgxps/gxps-parse-utils.h
index 410076e..6c1e391 100644
--- a/libgxps/gxps-parse-utils.h
+++ b/libgxps/gxps-parse-utils.h
@@ -24,22 +24,24 @@
 
 G_BEGIN_DECLS
 
-gboolean gxps_parse_stream          (GMarkupParseContext  *context,
-				     GInputStream         *stream,
-				     GError              **error);
-void     gxps_parse_error           (GMarkupParseContext  *context,
-				     const gchar          *source,
-				     GMarkupError          error_type,
-				     const gchar          *element_name,
-				     const gchar          *attribute_name,
-				     const gchar          *content,
-				     GError              **error);
-gboolean gxps_value_get_int         (const gchar          *value,
-				     gint                 *int_value);
-gboolean gxps_value_get_double      (const gchar          *value,
-                                     gdouble              *double_value);
-gchar   *gxps_resolve_relative_path (const gchar          *source,
-				     const gchar          *target);
+gboolean gxps_parse_stream              (GMarkupParseContext  *context,
+                                         GInputStream         *stream,
+                                         GError              **error);
+void     gxps_parse_error               (GMarkupParseContext  *context,
+                                         const gchar          *source,
+                                         GMarkupError          error_type,
+                                         const gchar          *element_name,
+                                         const gchar          *attribute_name,
+                                         const gchar          *content,
+                                         GError              **error);
+gboolean gxps_value_get_int             (const gchar          *value,
+                                         gint                 *int_value);
+gboolean gxps_value_get_double          (const gchar          *value,
+                                         gdouble              *double_value);
+gboolean gxps_value_get_double_positive (const gchar          *value,
+                                         gdouble              *double_value);
+gchar   *gxps_resolve_relative_path     (const gchar          *source,
+                                         const gchar          *target);
 
 G_END_DECLS