[gcalctool] Fix i being incorrectly displayed. Needs more work

[Robert Ancell <rancell src gnome org>]

commit d1f682724f7a5370f5a206afef347052388898a1
Author: Robert Ancell <robert ancell canonical com>
Date:   Thu Jan 27 18:27:23 2011 +1000

    Fix i being incorrectly displayed.  Needs more work

 src/mp-serializer.c |   58 +++++++++++++++++++++++++++++++++++++++++++++-----
 1 files changed, 52 insertions(+), 6 deletions(-)
---
diff --git a/src/mp-serializer.c b/src/mp-serializer.c
index 9d2b052..b19b0b4 100644
--- a/src/mp-serializer.c
+++ b/src/mp-serializer.c
@@ -223,18 +223,14 @@ mp_cast_to_string(MpSerializer *serializer, const MPNumber *x)
 }
 
 
-static gchar *
-mp_cast_to_exponential_string(MpSerializer *serializer, const MPNumber *x, gboolean eng_format)
+static void
+mp_cast_to_exponential_string_real(MpSerializer *serializer, const MPNumber *x, GString *string, gboolean eng_format)
 {
     gchar *fixed, *c;
     MPNumber t, z, base, base3, base10, base10inv, mantissa;
     int exponent = 0;
-    GString *string;
-    gchar *result;
     const gchar *super_digits[] = {"�", "¹", "²", "³", "�", "�", "�", "�", "�", "�"};
 
-    string = g_string_sized_new(1024);
-
     mp_abs(x, &z);
     if (mp_is_negative(x))
         g_string_append(string, "â??");
@@ -287,6 +283,56 @@ mp_cast_to_exponential_string(MpSerializer *serializer, const MPNumber *x, gbool
             g_string_append(string, super_digits[*c - '0']);
         g_free (super_value);
     }
+}
+
+
+static gchar *
+mp_cast_to_exponential_string(MpSerializer *serializer, const MPNumber *x, gboolean eng_format)
+{
+    GString *string;
+    MPNumber x_real;
+    gchar *result;
+
+    string = g_string_sized_new(1024);
+
+    mp_real_component(x, &x_real);
+    mp_cast_to_exponential_string_real(serializer, &x_real, string, eng_format);
+    if (mp_is_complex(x)) {
+        GString *s;
+        gboolean force_sign = TRUE;
+        MPNumber x_im;
+
+        mp_imaginary_component(x, &x_im);
+
+        if (strcmp(string->str, "0") == 0) {
+            g_string_assign(string, "");
+            force_sign = FALSE;
+        }
+
+        s = g_string_sized_new(1024);
+        mp_cast_to_exponential_string_real(serializer, &x_im, s, eng_format);
+        if (strcmp(s->str, "0") == 0 || strcmp(s->str, "+0") == 0 || strcmp(s->str, "â??0") == 0) {
+            /* Ignore */
+        }
+        else if (strcmp(s->str, "1") == 0) {
+            g_string_append(string, "i");
+        }
+        else if (strcmp(s->str, "+1") == 0) {
+            g_string_append(string, "+i");
+        }
+        else if (strcmp(s->str, "â??1") == 0) {
+            g_string_append(string, "â??i");
+        }
+        else {
+            if (strcmp(s->str, "+0") == 0)
+                g_string_append(string, "+");
+            else if (strcmp(s->str, "0") != 0)
+                g_string_append(string, s->str);
+
+            g_string_append(string, "i"); // FIXME: Insert before the *10^
+        }
+        g_string_free(s, TRUE);
+    }
 
     result = g_strndup(string->str, string->len + 1);
     g_string_free(string, TRUE);