[recipes] Add api to get the units for an ingredient

[Matthias Clasen <matthiasc src gnome org>]

commit 3cbc1e777dcc284497032806d7cc4ecba1b0713f
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Dec 13 20:35:05 2016 -0500

    Add api to get the units for an ingredient

 src/gr-ingredients-list.c |   36 +++++++++++++++++++++++++++++++++---
 src/gr-ingredients-list.h |    9 +++++++--
 2 files changed, 40 insertions(+), 5 deletions(-)
---
diff --git a/src/gr-ingredients-list.c b/src/gr-ingredients-list.c
index 4f587e3..1766fe0 100644
--- a/src/gr-ingredients-list.c
+++ b/src/gr-ingredients-list.c
@@ -409,17 +409,23 @@ format_scaled_number (Ingredient *ing, int num, int denom)
 }
 
 static void
-ingredient_scale (Ingredient *ing, int num, int denom, GString *s)
+ingredient_scale_unit (Ingredient *ing, int num, int denom, GString *s)
 {
         g_autofree char *scaled = NULL;
 
         scaled = format_scaled_number (ing, num, denom);
         g_string_append (s, scaled);
-        g_string_append (s, " ");
         if (ing->unit) {
-                g_string_append (s, ing->unit);
                 g_string_append (s, " ");
+                g_string_append (s, ing->unit);
         }
+}
+
+static void
+ingredient_scale (Ingredient *ing, int num, int denom, GString *s)
+{
+        ingredient_scale_unit (ing, num, denom, s);
+        g_string_append (s, " ");
         g_string_append (s, ing->name);
         g_string_append (s, "\n");
 }
@@ -458,3 +464,27 @@ gr_ingredients_list_get_ingredients (GrIngredientsList *ingredients)
 
         return ret;
 }
+
+char *
+gr_ingredients_list_scale_unit (GrIngredientsList *ingredients,
+                                const char        *name,
+                                int                num,
+                                int                denom)
+{
+        GList *l;
+
+        for (l = ingredients->ingredients; l; l = l->next) {
+                Ingredient *ing = (Ingredient *)l->data;
+
+                if (g_strcmp0 (name, ing->name) == 0) {
+                        GString *s;
+
+                        s = g_string_new ("");
+                        ingredient_scale_unit (ing, num, denom, s);
+
+                        return g_string_free (s, FALSE);
+                }
+        }
+
+        return NULL;
+}
diff --git a/src/gr-ingredients-list.h b/src/gr-ingredients-list.h
index f255490..f15c9c7 100644
--- a/src/gr-ingredients-list.h
+++ b/src/gr-ingredients-list.h
@@ -32,9 +32,14 @@ GrIngredientsList *gr_ingredients_list_new             (const char         *text
 
 gboolean           gr_ingredients_list_validate        (const char         *text,
                                                         GError            **error);
-gchar             *gr_ingredients_list_scale           (GrIngredientsList  *ingredients,
+char              *gr_ingredients_list_scale           (GrIngredientsList  *ingredients,
                                                         int                 num,
                                                         int                 denom);
-gchar            **gr_ingredients_list_get_ingredients (GrIngredientsList  *ingredients);
+char              *gr_ingredients_list_scale_unit      (GrIngredientsList  *ingredients,
+                                                        const char         *name,
+                                                        int                 num,
+                                                        int                 denom);
+char             **gr_ingredients_list_get_ingredients (GrIngredientsList  *ingredients);
+
 
 G_END_DECLS