[ruby/prism] feat: Adds macCroatian encoding

(https://github.com/ruby/prism/pull/1880)

* feat: Adds macCroatian encoding

- Based on:
https://en.wikipedia.org/wiki/Mac_OS_Croatian_encoding
https://www.unicode.org/Public/MAPPINGS/VENDORS/APPLE/CROATIAN.TXT

Co-authored-by: Josefine Rost <nijrost@gmail.com>

* Use output from bin/encodings and adds to docs/encoding.md

---------

https://github.com/ruby/prism/commit/019a82d8f3

Co-authored-by: Josefine Rost <nijrost@gmail.com>

4 files changed, 38 insertions, 0 deletions

diff --git a/prism/enc/pm_encoding.h b/prism/enc/pm_encoding.h
index a062bbe591..7279dfd7fb 100644
--- a/prism/enc/pm_encoding.h
+++ b/prism/enc/pm_encoding.h
@@ -196,6 +196,7 @@ extern pm_encoding_t pm_encoding_iso_8859_15;
 extern pm_encoding_t pm_encoding_iso_8859_16;
 extern pm_encoding_t pm_encoding_koi8_r;
 extern pm_encoding_t pm_encoding_mac_cent_euro;
+extern pm_encoding_t pm_encoding_mac_croatian;
 extern pm_encoding_t pm_encoding_mac_cyrillic;
 extern pm_encoding_t pm_encoding_mac_greek;
 extern pm_encoding_t pm_encoding_mac_iceland;
diff --git a/prism/enc/pm_tables.c b/prism/enc/pm_tables.c
index 87c7bfb495..d0414590cb 100644
--- a/prism/enc/pm_tables.c
+++ b/prism/enc/pm_tables.c
@@ -842,6 +842,30 @@ static uint8_t pm_encoding_mac_cent_euro_table[256] = {
 
 /**
  * Each element of the following table contains a bitfield that indicates a
+ * piece of information about the corresponding macCroatian character.
+ */
+static uint8_t pm_encoding_mac_croatian_table[256] = {
+//  0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0x
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 1x
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 2x
+    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 0, 0, 0, 0, 0, 0, // 3x
+    0, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, // 4x
+    7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 0, 0, 0, 0, 0, // 5x
+    0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, // 6x
+    3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 0, 0, 0, 0, 0, // 7x
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 8x
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 9x
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // Ax
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // Bx
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // Cx
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // Dx
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // Ex
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // Fx
+};
+
+ /**
+ * Each element of the following table contains a bitfield that indicates a
  * piece of information about the corresponding macCyrillic character.
  */
 static uint8_t pm_encoding_mac_cyrillic_table[256] = {
@@ -1371,6 +1395,7 @@ PRISM_ENCODING_TABLE(iso_8859_15)
 PRISM_ENCODING_TABLE(iso_8859_16)
 PRISM_ENCODING_TABLE(koi8_r)
 PRISM_ENCODING_TABLE(mac_cent_euro)
+PRISM_ENCODING_TABLE(mac_croatian)
 PRISM_ENCODING_TABLE(mac_cyrillic)
 PRISM_ENCODING_TABLE(mac_greek)
 PRISM_ENCODING_TABLE(mac_iceland)
@@ -1752,6 +1777,16 @@ pm_encoding_t pm_encoding_mac_cent_euro = {
     .multibyte = false
 };
 
+/** macCroatian */
+pm_encoding_t pm_encoding_mac_croatian = {
+    .name = "macCroatian",
+    .char_width = pm_encoding_single_char_width,
+    .alnum_char = pm_encoding_mac_croatian_alnum_char,
+    .alpha_char = pm_encoding_mac_croatian_alpha_char,
+    .isupper_char = pm_encoding_mac_croatian_isupper_char,
+    .multibyte = false
+};
+
 /** macCyrillic */
 pm_encoding_t pm_encoding_mac_cyrillic = {
     .name = "macCyrillic",
diff --git a/prism/prism.c b/prism/prism.c
index 5dcd3f2746..a0751efd37 100644
--- a/prism/prism.c
+++ b/prism/prism.c
@@ -6145,6 +6145,7 @@ parser_lex_magic_comment_encoding_value(pm_parser_t *parser, const uint8_t *star
                 break;
             case 'M': case 'm':
                 ENCODING1("macCentEuro", pm_encoding_mac_cent_euro);
+                ENCODING1("macCroatian", pm_encoding_mac_croatian);
                 ENCODING1("macCyrillic", pm_encoding_mac_cyrillic);
                 ENCODING1("macGreek", pm_encoding_mac_greek);
                 ENCODING1("macIceland", pm_encoding_mac_iceland);
diff --git a/test/prism/encoding_test.rb b/test/prism/encoding_test.rb
index bc9aae8e8a..a059e22716 100644
--- a/test/prism/encoding_test.rb
+++ b/test/prism/encoding_test.rb
@@ -43,6 +43,7 @@ module Prism
       Encoding::ISO_8859_16 =>  0x00...0x100,
       Encoding::KOI8_R =>       0x00...0x100,
       Encoding::MACCENTEURO =>  0x00...0x100,
+      Encoding::MACCROATIAN =>  0x00...0x100,
       Encoding::MACCYRILLIC =>  0x00...0x100,
       Encoding::MACGREEK =>     0x00...0x100,
       Encoding::MACICELAND =>   0x00...0x100,