Update display widths as part of updating Unicode

The hardcoded "wide character" set in ucs_wcwidth() was last updated
around the Unicode 5.0 era.  This led to misalignment when printing
emojis and other codepoints that have since been designated
wide or full-width.

To fix and keep up to date, extend update-unicode to download the list
of wide and full-width codepoints from the offical sources.

In passing, remove some comments about non-spacing characters that
haven't been accurate since we removed the former hardcoded logic.

Jacob Champion

Reported and reviewed by Pavel Stehule
Discussion: https://www.postgresql.org/message-id/flat/CAFj8pRCeX21O69YHxmykYySYyprZAqrKWWg0KoGKdjgqcGyygg@mail.gmail.com

1 files changed, 120 insertions, 0 deletions

diff --git a/src/include/common/unicode_east_asian_fw_table.h b/src/include/common/unicode_east_asian_fw_table.h
new file mode 100644
index 00000000000..b27f95b5dcc
--- /dev/null
+++ b/src/include/common/unicode_east_asian_fw_table.h
@@ -0,0 +1,120 @@
+/* generated by src/common/unicode/generate-unicode_east_asian_fw_table.pl, do not edit */
+
+static const struct mbinterval east_asian_fw[] = {
+	{0x1100, 0x115F},
+	{0x231A, 0x231B},
+	{0x2329, 0x232A},
+	{0x23E9, 0x23EC},
+	{0x23F0, 0x23F0},
+	{0x23F3, 0x23F3},
+	{0x25FD, 0x25FE},
+	{0x2614, 0x2615},
+	{0x2648, 0x2653},
+	{0x267F, 0x267F},
+	{0x2693, 0x2693},
+	{0x26A1, 0x26A1},
+	{0x26AA, 0x26AB},
+	{0x26BD, 0x26BE},
+	{0x26C4, 0x26C5},
+	{0x26CE, 0x26CE},
+	{0x26D4, 0x26D4},
+	{0x26EA, 0x26EA},
+	{0x26F2, 0x26F3},
+	{0x26F5, 0x26F5},
+	{0x26FA, 0x26FA},
+	{0x26FD, 0x26FD},
+	{0x2705, 0x2705},
+	{0x270A, 0x270B},
+	{0x2728, 0x2728},
+	{0x274C, 0x274C},
+	{0x274E, 0x274E},
+	{0x2753, 0x2755},
+	{0x2757, 0x2757},
+	{0x2795, 0x2797},
+	{0x27B0, 0x27B0},
+	{0x27BF, 0x27BF},
+	{0x2B1B, 0x2B1C},
+	{0x2B50, 0x2B50},
+	{0x2B55, 0x2B55},
+	{0x2E80, 0x2E99},
+	{0x2E9B, 0x2EF3},
+	{0x2F00, 0x2FD5},
+	{0x2FF0, 0x2FFB},
+	{0x3000, 0x303E},
+	{0x3041, 0x3096},
+	{0x3099, 0x30FF},
+	{0x3105, 0x312F},
+	{0x3131, 0x318E},
+	{0x3190, 0x31E3},
+	{0x31F0, 0x321E},
+	{0x3220, 0x3247},
+	{0x3250, 0x4DBF},
+	{0x4E00, 0xA48C},
+	{0xA490, 0xA4C6},
+	{0xA960, 0xA97C},
+	{0xAC00, 0xD7A3},
+	{0xF900, 0xFAFF},
+	{0xFE10, 0xFE19},
+	{0xFE30, 0xFE52},
+	{0xFE54, 0xFE66},
+	{0xFE68, 0xFE6B},
+	{0xFF01, 0xFF60},
+	{0xFFE0, 0xFFE6},
+	{0x16FE0, 0x16FE4},
+	{0x16FF0, 0x16FF1},
+	{0x17000, 0x187F7},
+	{0x18800, 0x18CD5},
+	{0x18D00, 0x18D08},
+	{0x1B000, 0x1B11E},
+	{0x1B150, 0x1B152},
+	{0x1B164, 0x1B167},
+	{0x1B170, 0x1B2FB},
+	{0x1F004, 0x1F004},
+	{0x1F0CF, 0x1F0CF},
+	{0x1F18E, 0x1F18E},
+	{0x1F191, 0x1F19A},
+	{0x1F200, 0x1F202},
+	{0x1F210, 0x1F23B},
+	{0x1F240, 0x1F248},
+	{0x1F250, 0x1F251},
+	{0x1F260, 0x1F265},
+	{0x1F300, 0x1F320},
+	{0x1F32D, 0x1F335},
+	{0x1F337, 0x1F37C},
+	{0x1F37E, 0x1F393},
+	{0x1F3A0, 0x1F3CA},
+	{0x1F3CF, 0x1F3D3},
+	{0x1F3E0, 0x1F3F0},
+	{0x1F3F4, 0x1F3F4},
+	{0x1F3F8, 0x1F43E},
+	{0x1F440, 0x1F440},
+	{0x1F442, 0x1F4FC},
+	{0x1F4FF, 0x1F53D},
+	{0x1F54B, 0x1F54E},
+	{0x1F550, 0x1F567},
+	{0x1F57A, 0x1F57A},
+	{0x1F595, 0x1F596},
+	{0x1F5A4, 0x1F5A4},
+	{0x1F5FB, 0x1F64F},
+	{0x1F680, 0x1F6C5},
+	{0x1F6CC, 0x1F6CC},
+	{0x1F6D0, 0x1F6D2},
+	{0x1F6D5, 0x1F6D7},
+	{0x1F6EB, 0x1F6EC},
+	{0x1F6F4, 0x1F6FC},
+	{0x1F7E0, 0x1F7EB},
+	{0x1F90C, 0x1F93A},
+	{0x1F93C, 0x1F945},
+	{0x1F947, 0x1F978},
+	{0x1F97A, 0x1F9CB},
+	{0x1F9CD, 0x1F9FF},
+	{0x1FA70, 0x1FA74},
+	{0x1FA78, 0x1FA7A},
+	{0x1FA80, 0x1FA86},
+	{0x1FA90, 0x1FAA8},
+	{0x1FAB0, 0x1FAB6},
+	{0x1FAC0, 0x1FAC2},
+	{0x1FAD0, 0x1FAD6},
+	{0x20000, 0x2FFFD},
+	{0x30000, 0x3FFFD},
+};