IBM720 encoding

Author: kddnewton

bin/encodings

@@ -55,6 +55,7 @@ when "cp855"        then table(Encoding::CP855)
 when "euc-jp"       then lists("euc-jp", 0...0x10000, Encoding::EUC_JP)
 when "gbk"          then lists("gbk", 0...0x10000, Encoding::GBK)
 when "ibm437"       then table(Encoding::IBM437)
+when "ibm720"       then table(Encoding::IBM720)
 when "iso-8859-1"   then table(Encoding::ISO8859_1)
 when "iso-8859-2"   then table(Encoding::ISO8859_2)
 when "iso-8859-3"   then table(Encoding::ISO8859_3)

include/prism/enc/pm_encoding.h

@@ -165,6 +165,7 @@ extern pm_encoding_t pm_encoding_cp855;
 extern pm_encoding_t pm_encoding_euc_jp;
 extern pm_encoding_t pm_encoding_gbk;
 extern pm_encoding_t pm_encoding_ibm437;
+extern pm_encoding_t pm_encoding_ibm720;
 extern pm_encoding_t pm_encoding_iso_8859_1;
 extern pm_encoding_t pm_encoding_iso_8859_2;
 extern pm_encoding_t pm_encoding_iso_8859_3;

src/enc/pm_tables.c

@@ -120,6 +120,30 @@ static uint8_t pm_encoding_ibm437_table[256] = {
     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 IBM720 character.
+ */
+static uint8_t pm_encoding_ibm720_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 ISO-8859-1 character.
@@ -789,6 +813,7 @@ PRISM_ENCODING_TABLE(cp850)
 PRISM_ENCODING_TABLE(cp852)
 PRISM_ENCODING_TABLE(cp855)
 PRISM_ENCODING_TABLE(ibm437)
+PRISM_ENCODING_TABLE(ibm720)
 PRISM_ENCODING_TABLE(iso_8859_1)
 PRISM_ENCODING_TABLE(iso_8859_2)
 PRISM_ENCODING_TABLE(iso_8859_3)
@@ -877,6 +902,16 @@ pm_encoding_t pm_encoding_ibm437 = {
     .multibyte = false
 };
 
+/** IBM720 */
+pm_encoding_t pm_encoding_ibm720 = {
+    .name = "IBM720",
+    .char_width = pm_encoding_single_char_width,
+    .alnum_char = pm_encoding_ibm720_alnum_char,
+    .alpha_char = pm_encoding_ibm720_alpha_char,
+    .isupper_char = pm_encoding_ibm720_isupper_char,
+    .multibyte = false
+};
+
 /** ISO-8859-1 */
 pm_encoding_t pm_encoding_iso_8859_1 = {
     .name = "ISO-8859-1",

src/prism.c

@@ -6073,6 +6073,7 @@ parser_lex_magic_comment_encoding_value(pm_parser_t *parser, const uint8_t *star
     ENCODING1("CP855", pm_encoding_cp855);
     ENCODING2("GBK", "CP936", pm_encoding_gbk);
     ENCODING2("IBM437", "CP437", pm_encoding_ibm437);
+    ENCODING2("IBM720", "CP720", pm_encoding_ibm720);
     ENCODING2("ISO-8859-1", "ISO8859-1", pm_encoding_iso_8859_1);
     ENCODING2("ISO-8859-2", "ISO8859-2", pm_encoding_iso_8859_2);
     ENCODING2("ISO-8859-3", "ISO8859-3", pm_encoding_iso_8859_3);

test/prism/encoding_test.rb

@@ -15,6 +15,7 @@ class EncodingTest < TestCase
       Encoding::EUC_JP,
       Encoding::GBK,
       Encoding::IBM437,
+      Encoding::IBM720,
       Encoding::ISO_8859_1,
       Encoding::ISO_8859_2,
       Encoding::ISO_8859_3,