[indic generator] Fix regression

Fixes https://github.com/harfbuzz/harfbuzz/issues/3690

src/gen-indic-table.py

@@ -458,7 +458,7 @@ for k, (cat, pos, block) in indic_data.items():
     if block.startswith('Khmer') or block.startswith('Myanmar'):
       cat = position_to_category(pos)
     else:
-      pos = indic_matra_position(u, pos, block)
+      pos = indic_matra_position(k, pos, block)
   elif cat in smvd_categories:
     pos = 'SMVD';
   indic_data[k] = (cat, pos, block)

src/hb-ot-shaper-indic-table.cc

@@ -109,9 +109,9 @@ static_assert (OT_VPst == M_Cat(VPst), "");
 #define _POS_T   POS_ABOVE_C     /*  22 chars; ABOVE_C */
 #define _POS_A   POS_AFTER_MAIN  /*   3 chars; AFTER_MAIN */
 #define _POS_AP  POS_AFTER_POST  /*  50 chars; AFTER_POST */
-#define _POS_AS  POS_AFTER_SUB   /*  45 chars; AFTER_SUB */
+#define _POS_AS  POS_AFTER_SUB   /*  51 chars; AFTER_SUB */
 #define _POS_C   POS_BASE_C      /* 833 chars; BASE_C */
-#define _POS_BS  POS_BEFORE_SUB  /*  31 chars; BEFORE_SUB */
+#define _POS_BS  POS_BEFORE_SUB  /*  25 chars; BEFORE_SUB */
 #define _POS_B   POS_BELOW_C     /*  13 chars; BELOW_C */
 #define _POS_X   POS_END         /*  71 chars; END */
 #define _POS_R   POS_POST_C      /*  13 chars; POST_C */
@@ -276,7 +276,7 @@ static const uint16_t indic_table[] = {
   /* 0C28 */  _(C,C),  _(X,X),  _(C,C),  _(C,C),  _(C,C),  _(C,C),  _(C,C),  _(C,C),
   /* 0C30 */  _(R,C),  _(C,C),  _(C,C),  _(C,C),  _(C,C),  _(C,C),  _(C,C),  _(C,C),
   /* 0C38 */  _(C,C),  _(C,C),  _(X,X),  _(X,X),  _(N,X), _(S,SM), _(M,BS), _(M,BS),
-  /* 0C40 */ _(M,BS), _(M,AS), _(M,AS), _(M,AS), _(M,AS),  _(X,X), _(M,BS), _(M,BS),
+  /* 0C40 */ _(M,BS), _(M,BS), _(M,BS), _(M,AS), _(M,AS),  _(X,X), _(M,BS), _(M,BS),
   /* 0C48 */ _(M,BS),  _(X,X), _(M,BS), _(M,BS), _(M,BS),  _(H,T),  _(X,X),  _(X,X),
   /* 0C50 */  _(X,X),  _(X,X),  _(X,X),  _(X,X),  _(X,X), _(M,BS), _(M,BS),  _(X,X),
   /* 0C58 */  _(C,C),  _(C,C),  _(C,C),  _(X,X),  _(X,X),  _(C,C),  _(X,X),  _(X,X),
@@ -295,9 +295,9 @@ static const uint16_t indic_table[] = {
   /* 0CA8 */  _(C,C),  _(X,X),  _(C,C),  _(C,C),  _(C,C),  _(C,C),  _(C,C),  _(C,C),
   /* 0CB0 */  _(R,C),  _(C,C),  _(C,C),  _(C,C),  _(X,X),  _(C,C),  _(C,C),  _(C,C),
   /* 0CB8 */  _(C,C),  _(C,C),  _(X,X),  _(X,X),  _(N,X), _(S,SM), _(M,BS), _(M,BS),
-  /* 0CC0 */ _(M,BS), _(M,BS), _(M,BS), _(M,BS), _(M,BS),  _(X,X), _(M,BS), _(M,BS),
-  /* 0CC8 */ _(M,BS),  _(X,X), _(M,BS), _(M,BS), _(M,BS),  _(H,T),  _(X,X),  _(X,X),
-  /* 0CD0 */  _(X,X),  _(X,X),  _(X,X),  _(X,X),  _(X,X), _(M,BS), _(M,BS),  _(X,X),
+  /* 0CC0 */ _(M,BS), _(M,BS), _(M,BS), _(M,AS), _(M,AS),  _(X,X), _(M,BS), _(M,AS),
+  /* 0CC8 */ _(M,AS),  _(X,X), _(M,AS), _(M,AS), _(M,BS),  _(H,T),  _(X,X),  _(X,X),
+  /* 0CD0 */  _(X,X),  _(X,X),  _(X,X),  _(X,X),  _(X,X), _(M,AS), _(M,AS),  _(X,X),
   /* 0CD8 */  _(X,X),  _(X,X),  _(X,X),  _(X,X),  _(X,X),  _(C,C),  _(C,C),  _(X,X),
   /* 0CE0 */  _(V,C),  _(V,C), _(M,BS), _(M,BS),  _(X,X),  _(X,X), _(GB,C), _(GB,C),
   /* 0CE8 */ _(GB,C), _(GB,C), _(GB,C), _(GB,C), _(GB,C), _(GB,C), _(GB,C), _(GB,C),

test/shape/data/in-house/tests/indic-special-cases.tests

@@ -1,3 +1,4 @@
 ../fonts/3cae6bfe5b57c07ba81ddbd54c02fe4f3a1e3bf6.ttf;;U+0CB0,U+0CCD,U+0C95;[gid1=0+1176|gid5=0+1161]
 ../fonts/3cae6bfe5b57c07ba81ddbd54c02fe4f3a1e3bf6.ttf;;U+0CB0,U+200D,U+0CCD,U+0C95;[gid2=0+1334|gid6=0+358]
 ../fonts/3cae6bfe5b57c07ba81ddbd54c02fe4f3a1e3bf6.ttf;;U+0CB0,U+0CCD,U+200D,U+0C95;[gid2=0+1334|gid6=0+358]
+../fonts/e716f6bd00a108d186b7e9f47b4515565f784f36.ttf;;U+0C1A,U+0C3F,U+0C32,U+0C4D,U+0C15,U+0C42,U+0C30,U+0C4D;[civoweltelu=0+766|latelu=2+709|uuvowelsigntelu=2+661|kasubscripttelu=2+483|rahalanttelu=6+593]