handle ‘aum’ as aum only if followed by a whitespace

compat.h

@@ -8,6 +8,7 @@
 #include <fcntl.h>
 #include <stdarg.h>
 #include <getopt.h>
+#include <ctype.h>
 #include <errno.h>
 
 #define ARRAY_SIZE(a) sizeof(a) / sizeof(*a)

tests/translit.c

@@ -67,6 +67,11 @@ START_TEST(test_translit_lla_sylable)
 }
 END_TEST
 
+START_TEST(test_translit_aum)
+{
+	test_translit("ॐ औम औमे तौमे ॐ", "aum auma aume taume aum");
+}
+
 START_TEST(test_translit_candrabindu)
 {
 	test_translit("तान्यजत्राँ", "tānyajatrām̐");
@@ -84,6 +89,7 @@ void register_translit_tests(TCase *test_case)
 	tcase_add_test(test_case, test_translit_words);
 	tcase_add_test(test_case, test_translit_vedic);
 	tcase_add_test(test_case, test_translit_lla_sylable);
+	tcase_add_test(test_case, test_translit_aum);
 	tcase_add_test(test_case, test_translit_candrabindu);
 	tcase_add_test(test_case, test_translit_zero_width_joiner);
 }

transliteration.c

@@ -8,6 +8,7 @@
 #define SCHWA_CHARACTER   'a'
 #define ZERO_WIDTH_JOINER 0x200d
 #define VIRAMA            0x094d
+#define AUM               0x0950
 #define CHUNKSIZE         1024
 
 static struct translit_letter table[] = {
@@ -259,6 +260,14 @@ int transliterate_latin_to_devanagari(const char *latin, char **ret)
 					letter = letter_by_code(0x0933); /* .la */
 				}
 			}
+
+			if (letter->code == AUM) {
+				/* ‘aum’ is followed by something else than
+				 * a whitespace → it is ‘au’ + ‘m…’ */
+				if (!isspace(src[3]) && src[3] != '\0') {
+					letter = letter_by_code(0x0914);
+				}
+			}
 encode_consonant:
 			/* A consonant or an initial vowel */
 			utf8_pack_char(devanagari + done, letter->code);