+ /* We never spell simple intervals as inversions. */
+ if (num_degrees == 2)
+ max_inversions = 1;
+
+ for (inversion = 0; inversion < max_inversions; inversion++) {
+ for (i = 0; i < num_degrees; i++) {
+ /* The num_degrees is in the addition just to ensure all
+ * inputs to the modulus operator remain positive. */
+ int index = (i + num_degrees - inversion) % num_degrees;
+
+ /* Again, adding a 12 to keep things positive. */
+ relative_pitches[index] =
+ (12 +
+ _modified_degree_to_half_steps (°rees[i]) -
+ _modified_degree_to_half_steps (°rees[inversion])) % 12;
+
+ }
+
+ for (i = 0; i < num_notes; i++)
+ if (notes[i].relative_pitch != relative_pitches[i])
+ goto NEXT_INVERSION;
+
+ root_index = (num_notes - inversion) % num_notes;
+ *root = notes[root_index].note->pitch;
+
+ *inversion_ret = inversion;
+
+ return 1;
+
+ NEXT_INVERSION:
+ ;
+ }
+
+ return 0;
+}
+
+static const char *
+_pitch_str (score_pitch_t pitch)
+{
+ switch (pitch) {
+ case SCORE_PITCH_Cff:
+ return "C𝄫";
+ case SCORE_PITCH_Cf:
+ return "C♭";
+ case SCORE_PITCH_C:
+ return "C";
+ case SCORE_PITCH_Cs:
+ return "C♯";
+ case SCORE_PITCH_Css:
+ return "C𝄪";
+ case SCORE_PITCH_Dff:
+ return "D𝄫";
+ case SCORE_PITCH_Df:
+ return "D♭";
+ case SCORE_PITCH_D:
+ return "D";
+ case SCORE_PITCH_Ds:
+ return "D♯";
+ case SCORE_PITCH_Dss:
+ return "D𝄪";
+ case SCORE_PITCH_Eff:
+ return "E𝄫";
+ case SCORE_PITCH_Ef:
+ return "E♭";
+ case SCORE_PITCH_E:
+ return "E";
+ case SCORE_PITCH_Es:
+ return "E♯";
+ case SCORE_PITCH_Ess:
+ return "E𝄪";
+ case SCORE_PITCH_Fff:
+ return "F𝄫";
+ case SCORE_PITCH_Ff:
+ return "F♭";
+ case SCORE_PITCH_F:
+ return "F";
+ case SCORE_PITCH_Fs:
+ return "F♯";
+ case SCORE_PITCH_Fss:
+ return "F𝄪";
+ case SCORE_PITCH_Gff:
+ return "G𝄫";
+ case SCORE_PITCH_Gf:
+ return "G♭";
+ case SCORE_PITCH_G:
+ return "G";
+ case SCORE_PITCH_Gs:
+ return "G♯";
+ case SCORE_PITCH_Gss:
+ return "G𝄪";
+ case SCORE_PITCH_Aff:
+ return "A𝄫";
+ case SCORE_PITCH_Af:
+ return "A♭";
+ case SCORE_PITCH_A:
+ return "A";
+ case SCORE_PITCH_As:
+ return "A♯";
+ case SCORE_PITCH_Ass:
+ return "A𝄪";
+ case SCORE_PITCH_Bff:
+ return "B𝄫";
+ case SCORE_PITCH_Bf:
+ return "B♭";
+ case SCORE_PITCH_B:
+ return "B";
+ case SCORE_PITCH_Bs:
+ return "B♯";
+ case SCORE_PITCH_Bss:
+ return "B𝄪";
+ }