/
mysql.lua
1456 lines (1341 loc) · 37.1 KB
/
mysql.lua
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--MySQL client protocol in Lua.
--Written by Cosmin Apreutesei. Public domain.
--Original code by Yichun Zhang (agentzh). BSD license.
if not ... then require'mysql_test'; return end
local ffi = require'ffi'
local bit = require'bit'
local sha1 = require'sha1'.sha1
local glue = require'glue'
local errors = require'errors'
local format = string.format
local band = bit.band
local xor = bit.bxor
local bor = bit.bor
local shl = bit.lshift
local shr = bit.rshift
local floor = math.floor
local ceil = math.ceil
local tonumber = tonumber
local dynarray = glue.dynarray
local u8a = glue.u8a
local index = glue.index
local repl = glue.repl
local update = glue.update
local check_io, checkp, _, protect = errors.tcp_protocol_errors'mysql'
local mysql = {}
local COM_QUIT = 0x01
local COM_QUERY = 0x03
local COM_STMT_PREPARE = 0x16
local COM_STMT_EXECUTE = 0x17
local COM_STMT_CLOSE = 0x19
local CLIENT_SSL = 0x0800
local SERVER_MORE_RESULTS_EXISTS = 8
local collation_names = {
[ 1] = 'big5_chinese_ci',
[ 2] = 'latin2_czech_cs',
[ 3] = 'dec8_swedish_ci',
[ 4] = 'cp850_general_ci',
[ 5] = 'latin1_german1_ci',
[ 6] = 'hp8_english_ci',
[ 7] = 'koi8r_general_ci',
[ 8] = 'latin1_swedish_ci',
[ 9] = 'latin2_general_ci',
[ 10] = 'swe7_swedish_ci',
[ 11] = 'ascii_general_ci',
[ 12] = 'ujis_japanese_ci',
[ 13] = 'sjis_japanese_ci',
[ 14] = 'cp1251_bulgarian_ci',
[ 15] = 'latin1_danish_ci',
[ 16] = 'hebrew_general_ci',
[ 18] = 'tis620_thai_ci',
[ 19] = 'euckr_korean_ci',
[ 20] = 'latin7_estonian_cs',
[ 21] = 'latin2_hungarian_ci',
[ 22] = 'koi8u_general_ci',
[ 23] = 'cp1251_ukrainian_ci',
[ 24] = 'gb2312_chinese_ci',
[ 25] = 'greek_general_ci',
[ 26] = 'cp1250_general_ci',
[ 27] = 'latin2_croatian_ci',
[ 28] = 'gbk_chinese_ci',
[ 29] = 'cp1257_lithuanian_ci',
[ 30] = 'latin5_turkish_ci',
[ 31] = 'latin1_german2_ci',
[ 32] = 'armscii8_general_ci',
[ 33] = 'utf8_general_ci',
[ 34] = 'cp1250_czech_cs',
[ 35] = 'ucs2_general_ci',
[ 36] = 'cp866_general_ci',
[ 37] = 'keybcs2_general_ci',
[ 38] = 'macce_general_ci',
[ 39] = 'macroman_general_ci',
[ 40] = 'cp852_general_ci',
[ 41] = 'latin7_general_ci',
[ 42] = 'latin7_general_cs',
[ 43] = 'macce_bin',
[ 44] = 'cp1250_croatian_ci',
[ 45] = 'utf8mb4_general_ci',
[ 46] = 'utf8mb4_bin',
[ 47] = 'latin1_bin',
[ 48] = 'latin1_general_ci',
[ 49] = 'latin1_general_cs',
[ 50] = 'cp1251_bin',
[ 51] = 'cp1251_general_ci',
[ 52] = 'cp1251_general_cs',
[ 53] = 'macroman_bin',
[ 54] = 'utf16_general_ci',
[ 55] = 'utf16_bin',
[ 56] = 'utf16le_general_ci',
[ 57] = 'cp1256_general_ci',
[ 58] = 'cp1257_bin',
[ 59] = 'cp1257_general_ci',
[ 60] = 'utf32_general_ci',
[ 61] = 'utf32_bin',
[ 62] = 'utf16le_bin',
[ 63] = 'binary',
[ 64] = 'armscii8_bin',
[ 65] = 'ascii_bin',
[ 66] = 'cp1250_bin',
[ 67] = 'cp1256_bin',
[ 68] = 'cp866_bin',
[ 69] = 'dec8_bin',
[ 70] = 'greek_bin',
[ 71] = 'hebrew_bin',
[ 72] = 'hp8_bin',
[ 73] = 'keybcs2_bin',
[ 74] = 'koi8r_bin',
[ 75] = 'koi8u_bin',
[ 76] = 'utf8_tolower_ci',
[ 77] = 'latin2_bin',
[ 78] = 'latin5_bin',
[ 79] = 'latin7_bin',
[ 80] = 'cp850_bin',
[ 81] = 'cp852_bin',
[ 82] = 'swe7_bin',
[ 83] = 'utf8_bin',
[ 84] = 'big5_bin',
[ 85] = 'euckr_bin',
[ 86] = 'gb2312_bin',
[ 87] = 'gbk_bin',
[ 88] = 'sjis_bin',
[ 89] = 'tis620_bin',
[ 90] = 'ucs2_bin',
[ 91] = 'ujis_bin',
[ 92] = 'geostd8_general_ci',
[ 93] = 'geostd8_bin',
[ 94] = 'latin1_spanish_ci',
[ 95] = 'cp932_japanese_ci',
[ 96] = 'cp932_bin',
[ 97] = 'eucjpms_japanese_ci',
[ 98] = 'eucjpms_bin',
[ 99] = 'cp1250_polish_ci',
[101] = 'utf16_unicode_ci',
[102] = 'utf16_icelandic_ci',
[103] = 'utf16_latvian_ci',
[104] = 'utf16_romanian_ci',
[105] = 'utf16_slovenian_ci',
[106] = 'utf16_polish_ci',
[107] = 'utf16_estonian_ci',
[108] = 'utf16_spanish_ci',
[109] = 'utf16_swedish_ci',
[110] = 'utf16_turkish_ci',
[111] = 'utf16_czech_ci',
[112] = 'utf16_danish_ci',
[113] = 'utf16_lithuanian_ci',
[114] = 'utf16_slovak_ci',
[115] = 'utf16_spanish2_ci',
[116] = 'utf16_roman_ci',
[117] = 'utf16_persian_ci',
[118] = 'utf16_esperanto_ci',
[119] = 'utf16_hungarian_ci',
[120] = 'utf16_sinhala_ci',
[121] = 'utf16_german2_ci',
[122] = 'utf16_croatian_ci',
[123] = 'utf16_unicode_520_ci',
[124] = 'utf16_vietnamese_ci',
[128] = 'ucs2_unicode_ci',
[129] = 'ucs2_icelandic_ci',
[130] = 'ucs2_latvian_ci',
[131] = 'ucs2_romanian_ci',
[132] = 'ucs2_slovenian_ci',
[133] = 'ucs2_polish_ci',
[134] = 'ucs2_estonian_ci',
[135] = 'ucs2_spanish_ci',
[136] = 'ucs2_swedish_ci',
[137] = 'ucs2_turkish_ci',
[138] = 'ucs2_czech_ci',
[139] = 'ucs2_danish_ci',
[140] = 'ucs2_lithuanian_ci',
[141] = 'ucs2_slovak_ci',
[142] = 'ucs2_spanish2_ci',
[143] = 'ucs2_roman_ci',
[144] = 'ucs2_persian_ci',
[145] = 'ucs2_esperanto_ci',
[146] = 'ucs2_hungarian_ci',
[147] = 'ucs2_sinhala_ci',
[148] = 'ucs2_german2_ci',
[149] = 'ucs2_croatian_ci',
[150] = 'ucs2_unicode_520_ci',
[151] = 'ucs2_vietnamese_ci',
[159] = 'ucs2_general_mysql500_ci',
[160] = 'utf32_unicode_ci',
[161] = 'utf32_icelandic_ci',
[162] = 'utf32_latvian_ci',
[163] = 'utf32_romanian_ci',
[164] = 'utf32_slovenian_ci',
[165] = 'utf32_polish_ci',
[166] = 'utf32_estonian_ci',
[167] = 'utf32_spanish_ci',
[168] = 'utf32_swedish_ci',
[169] = 'utf32_turkish_ci',
[170] = 'utf32_czech_ci',
[171] = 'utf32_danish_ci',
[172] = 'utf32_lithuanian_ci',
[173] = 'utf32_slovak_ci',
[174] = 'utf32_spanish2_ci',
[175] = 'utf32_roman_ci',
[176] = 'utf32_persian_ci',
[177] = 'utf32_esperanto_ci',
[178] = 'utf32_hungarian_ci',
[179] = 'utf32_sinhala_ci',
[180] = 'utf32_german2_ci',
[181] = 'utf32_croatian_ci',
[182] = 'utf32_unicode_520_ci',
[183] = 'utf32_vietnamese_ci',
[192] = 'utf8_unicode_ci',
[193] = 'utf8_icelandic_ci',
[194] = 'utf8_latvian_ci',
[195] = 'utf8_romanian_ci',
[196] = 'utf8_slovenian_ci',
[197] = 'utf8_polish_ci',
[198] = 'utf8_estonian_ci',
[199] = 'utf8_spanish_ci',
[200] = 'utf8_swedish_ci',
[201] = 'utf8_turkish_ci',
[202] = 'utf8_czech_ci',
[203] = 'utf8_danish_ci',
[204] = 'utf8_lithuanian_ci',
[205] = 'utf8_slovak_ci',
[206] = 'utf8_spanish2_ci',
[207] = 'utf8_roman_ci',
[208] = 'utf8_persian_ci',
[209] = 'utf8_esperanto_ci',
[210] = 'utf8_hungarian_ci',
[211] = 'utf8_sinhala_ci',
[212] = 'utf8_german2_ci',
[213] = 'utf8_croatian_ci',
[214] = 'utf8_unicode_520_ci',
[215] = 'utf8_vietnamese_ci',
[223] = 'utf8_general_mysql500_ci',
[224] = 'utf8mb4_unicode_ci',
[225] = 'utf8mb4_icelandic_ci',
[226] = 'utf8mb4_latvian_ci',
[227] = 'utf8mb4_romanian_ci',
[228] = 'utf8mb4_slovenian_ci',
[229] = 'utf8mb4_polish_ci',
[230] = 'utf8mb4_estonian_ci',
[231] = 'utf8mb4_spanish_ci',
[232] = 'utf8mb4_swedish_ci',
[233] = 'utf8mb4_turkish_ci',
[234] = 'utf8mb4_czech_ci',
[235] = 'utf8mb4_danish_ci',
[236] = 'utf8mb4_lithuanian_ci',
[237] = 'utf8mb4_slovak_ci',
[238] = 'utf8mb4_spanish2_ci',
[239] = 'utf8mb4_roman_ci',
[240] = 'utf8mb4_persian_ci',
[241] = 'utf8mb4_esperanto_ci',
[242] = 'utf8mb4_hungarian_ci',
[243] = 'utf8mb4_sinhala_ci',
[244] = 'utf8mb4_german2_ci',
[245] = 'utf8mb4_croatian_ci',
[246] = 'utf8mb4_unicode_520_ci',
[247] = 'utf8mb4_vietnamese_ci',
[248] = 'gb18030_chinese_ci',
[249] = 'gb18030_bin',
[250] = 'gb18030_unicode_520_ci',
[255] = 'utf8mb4_0900_ai_ci',
[256] = 'utf8mb4_de_pb_0900_ai_ci',
[257] = 'utf8mb4_is_0900_ai_ci',
[258] = 'utf8mb4_lv_0900_ai_ci',
[259] = 'utf8mb4_ro_0900_ai_ci',
[260] = 'utf8mb4_sl_0900_ai_ci',
[261] = 'utf8mb4_pl_0900_ai_ci',
[262] = 'utf8mb4_et_0900_ai_ci',
[263] = 'utf8mb4_es_0900_ai_ci',
[264] = 'utf8mb4_sv_0900_ai_ci',
[265] = 'utf8mb4_tr_0900_ai_ci',
[266] = 'utf8mb4_cs_0900_ai_ci',
[267] = 'utf8mb4_da_0900_ai_ci',
[268] = 'utf8mb4_lt_0900_ai_ci',
[269] = 'utf8mb4_sk_0900_ai_ci',
[270] = 'utf8mb4_es_trad_0900_ai_ci',
[271] = 'utf8mb4_la_0900_ai_ci',
[273] = 'utf8mb4_eo_0900_ai_ci',
[274] = 'utf8mb4_hu_0900_ai_ci',
[275] = 'utf8mb4_hr_0900_ai_ci',
[277] = 'utf8mb4_vi_0900_ai_ci',
[278] = 'utf8mb4_0900_as_cs',
[279] = 'utf8mb4_de_pb_0900_as_cs',
[280] = 'utf8mb4_is_0900_as_cs',
[281] = 'utf8mb4_lv_0900_as_cs',
[282] = 'utf8mb4_ro_0900_as_cs',
[283] = 'utf8mb4_sl_0900_as_cs',
[284] = 'utf8mb4_pl_0900_as_cs',
[285] = 'utf8mb4_et_0900_as_cs',
[286] = 'utf8mb4_es_0900_as_cs',
[287] = 'utf8mb4_sv_0900_as_cs',
[288] = 'utf8mb4_tr_0900_as_cs',
[289] = 'utf8mb4_cs_0900_as_cs',
[290] = 'utf8mb4_da_0900_as_cs',
[291] = 'utf8mb4_lt_0900_as_cs',
[292] = 'utf8mb4_sk_0900_as_cs',
[293] = 'utf8mb4_es_trad_0900_as_cs',
[294] = 'utf8mb4_la_0900_as_cs',
[296] = 'utf8mb4_eo_0900_as_cs',
[297] = 'utf8mb4_hu_0900_as_cs',
[298] = 'utf8mb4_hr_0900_as_cs',
[300] = 'utf8mb4_vi_0900_as_cs',
[303] = 'utf8mb4_ja_0900_as_cs',
[304] = 'utf8mb4_ja_0900_as_cs_ks',
[305] = 'utf8mb4_0900_as_ci',
[306] = 'utf8mb4_ru_0900_ai_ci',
[307] = 'utf8mb4_ru_0900_as_cs',
[308] = 'utf8mb4_zh_0900_as_cs',
[309] = 'utf8mb4_0900_bin',
}
local collation_codes = index(collation_names)
local default_collations = {
big5 = 'big5_chinese_ci',
dec8 = 'dec8_swedish_ci',
cp850 = 'cp850_general_ci',
hp8 = 'hp8_english_ci',
koi8r = 'koi8r_general_ci',
latin1 = 'latin1_swedish_ci',
latin2 = 'latin2_general_ci',
swe7 = 'swe7_swedish_ci',
ascii = 'ascii_general_ci',
ujis = 'ujis_japanese_ci',
sjis = 'sjis_japanese_ci',
hebrew = 'hebrew_general_ci',
tis620 = 'tis620_thai_ci',
euckr = 'euckr_korean_ci',
koi8u = 'koi8u_general_ci',
gb2312 = 'gb2312_chinese_ci',
greek = 'greek_general_ci',
cp1250 = 'cp1250_general_ci',
gbk = 'gbk_chinese_ci',
latin5 = 'latin5_turkish_ci',
armscii8 = 'armscii8_general_ci',
utf8 = 'utf8_general_ci',
ucs2 = 'ucs2_general_ci',
cp866 = 'cp866_general_ci',
keybcs2 = 'keybcs2_general_ci',
macce = 'macce_general_ci',
macroman = 'macroman_general_ci',
cp852 = 'cp852_general_ci',
latin7 = 'latin7_general_ci',
cp1251 = 'cp1251_general_ci',
utf16 = 'utf16_general_ci',
utf16le = 'utf16le_general_ci',
cp1256 = 'cp1256_general_ci',
cp1257 = 'cp1257_general_ci',
utf32 = 'utf32_general_ci',
binary = 'binary',
geostd8 = 'geostd8_general_ci',
cp932 = 'cp932_japanese_ci',
eucjpms = 'eucjpms_japanese_ci',
gb18030 = 'gb18030_chinese_ci',
utf8mb4 = 'utf8mb4_0900_ai_ci',
}
local mb_charsets = { --excluding ASCII supersets i.e. utf8* charsets.
big5=1,
sjis=1,
euckr=1,
gb2312=1,
gbk=1,
ucs2=1,
cp932=1,
ujis=1,
eucjpms=1,
utf16=1,
utf16le=1,
utf32=1,
gb18030=1,
}
local max_char_widths = {
utf8 = 3,
utf8mb4 = 4,
big5 = 2,
sjis = 2,
euckr = 2,
gb2312 = 2,
gbk = 2,
ucs2 = 2,
cp932 = 2,
ujis = 3, --eukjp
eucjpms = 3,
utf16 = 4,
utf16le = 4,
utf32 = 4,
gb18030 = 2,
}
local buffer_type_names = {
[ 0] = 'decimal',
[ 1] = 'tiny',
[ 2] = 'short',
[ 3] = 'long',
[ 4] = 'float',
[ 5] = 'double',
[ 6] = 'null',
[ 7] = 'timestamp',
[ 8] = 'longlong',
[ 9] = 'int24',
[ 10] = 'date',
[ 11] = 'time',
[ 12] = 'datetime',
[ 13] = 'year',
[ 15] = 'varchar',
[ 16] = 'bit',
[246] = 'newdecimal',
[247] = 'enum',
[248] = 'set',
[249] = 'tiny_blob',
[250] = 'medium_blob',
[251] = 'long_blob',
[252] = 'blob',
[253] = 'var_string',
[254] = 'string',
[255] = 'geometry',
}
local bin_types = {
tiny = 'tinyint',
short = 'smallint',
int24 = 'mediumint',
long = 'int',
longlong = 'bigint',
newdecimal = 'decimal',
tiny_blob = 'tinyblob', --always selected as blob
medium_blob = 'mediumblob', --always selected as blob
long_blob = 'longblob', --always selected as blob
var_string = 'varbinary',
string = 'binary',
}
local text_types = {
tiny_blob = 'tinytext', --always selected as text
medium_blob = 'mediumtext', --always selected as text
long_blob = 'longtext', --always selected as text
blob = 'text',
var_string = 'varchar',
string = 'char',
}
local string_types = {
string=1,
varchar=1,
var_string=1,
enum=1,
set=1,
blob=1,
tiny_blob=1,
medium_blob=1,
long_blob=1,
geometry=1,
bit=1,
decimal=1,
newdecimal=1,
}
local int_ranges = {
tinyint = {1, -(2^ 7-1), 2^ 7, 0, 2^ 8-1},
smallint = {2, -(2^15-1), 2^15, 0, 2^16-1},
mediumint = {3, -(2^23-1), 2^23, 0, 2^24-1},
int = {4, -(2^31-1), 2^31, 0, 2^32-1},
bigint = {8, -(2^51-1), 2^51, 0, 2^52-1},
}
local conn = {}
local conn_mt = {__index = conn}
function mysql.isconn(x)
return getmetatable(x) == conn_mt
end
local function return_arg1(v) return v end
assert(ffi.abi'le')
local function buf_len(buf)
local _, _, n = buf()
buf(-n)
return n
end
local i8_ct = ffi.typeof 'int8_t*'
local i16_ct = ffi.typeof 'int16_t*'
local u16_ct = ffi.typeof'uint16_t*'
local i32_ct = ffi.typeof' int32_t*'
local u32_ct = ffi.typeof'uint32_t*'
local i64_ct = ffi.typeof 'int64_t*'
local u64_ct = ffi.typeof'uint64_t*'
local f64_ct = ffi.typeof'double*'
local f32_ct = ffi.typeof'float*'
local function get_u8(buf)
local p, i = buf(1)
return p[i]
end
local function get_i8(buf)
local p, i = buf(1)
return ffi.cast(i8_ct, p+i)[0]
end
local function get_u16(buf)
local p, i = buf(2)
return ffi.cast(u16_ct, p+i)[0]
end
local function get_i16(buf)
local p, i = buf(2)
return ffi.cast(i16_ct, p+i)[0]
end
local function get_u24(buf)
local p, i = buf(3)
local a, b, c = p[i], p[i+1], p[i+2]
return bor(a, shl(b, 8), shl(c, 16))
end
local function get_u32(buf)
local p, i = buf(4)
return ffi.cast(u32_ct, p+i)[0]
end
local function get_i32(buf)
local p, i = buf(4)
return ffi.cast(i32_ct, p+i)[0]
end
local function get_u64(buf)
local p, i = buf(8)
return tonumber(ffi.cast(u64_ct, p+i)[0])
end
local function get_i64(buf)
local p, i = buf(8)
return tonumber(ffi.cast(i64_ct, p+i)[0])
end
local function get_f64(buf)
local p, i = buf(8)
return tonumber(ffi.cast(f64_ct, p+i)[0])
end
local function get_f32(buf)
local p, i = buf(4)
return tonumber(ffi.cast(f32_ct, p+i)[0])
end
local function get_uint(buf) --length-encoded int
local c = get_u8(buf)
if c < 0xfb then
return c
elseif c == 0xfb then --NULL string
return nil
elseif c == 0xfc then
return get_u16(buf)
elseif c == 0xfd then
return get_u24(buf)
elseif c == 0xfe then
return get_u64(buf)
else
buf(1/0, 'invalid length-encoded int')
end
end
local function get_cstring(buf)
local p, i0 = buf(0)
while true do
local _, i = buf(1)
if p[i] == 0 then
return ffi.string(p+i0, i-i0)
end
i = i + 1
end
end
local function get_str(buf) --length-encoded string
local slen = get_uint(buf)
if not slen then return nil end
local p, i = buf(slen)
return ffi.string(p+i, slen)
end
local function get_bytes(buf, len) --fixed-length string
local p, i, len = buf(len)
return ffi.string(p+i, len)
end
local function get_datetime(buf, date_format)
local len = get_u8(buf)
if len == 0 then
return date_format == '*t'
and {year = 0, month = 0, day = 0}
or date_format and format(date_format, 0, 0, 0, 0, 0, 0, 0)
or '0000-00-00'
end
local y = get_u16(buf)
local m = get_u8(buf)
local d = get_u8(buf)
if len == 4 then
return date_format == '*t'
and {year = y, month = m, day = d}
or format(date_format or '%04d-%02d-%02d', y, m, d, 0, 0, 0, 0)
end
local H = get_u8(buf)
local M = get_u8(buf)
local S = get_u8(buf)
local ms = len == 7 and 0 or get_u32(buf)
return date_format == '*t'
and {year = y, month = m, day = d, hour = H, min = M, sec = S + ms / 10^6}
or format(date_format or (len == 7
and '%04d-%02d-%02d %02d:%02d:%02d'
or '%04d-%02d-%02d %02d:%02d:%02d.%06d'),
y, m, d, H, M, S, ms)
end
local function get_time(buf, time_format)
local len = get_u8(buf)
if len == 0 then
return {days = 0, hour = 0, min = 0, sec = 0}
end
local sign = get_u8(buf) == 1 and -1 or 1
local days = get_u4(buf) * sign
local H = get_u8(buf)
local M = get_u8(buf)
local S = get_u8(buf)
local ms = len == 8 and 0 or get_u32(buf)
return time_format == '*t'
and {days = days, hour = H, min = M, sec = S + ms / 10^6}
or time_format == '*s' and days * 24 * 3600 + H * 3600 + M * 60 + S + ms / 10^6
or format(time_format or (len == 8
and '%dd %02d:%02d:%02d'
or '%dd %02d:%02d:%02d.%06d'), days, H, M, S, ms)
end
local function set_datetime(buf, t)
local y, m, d, H, M, S
if type(t) == 'string' then
y, m, d, t = t:match'^(%d+)-(%d+)-(%d+)(.*)'
H, M, S = t:match' (%d+):(%d+):([%d.]+)'
y = tonumber(y)
m = tonumber(m)
d = tonumber(d)
H = tonumber(H) or 0
M = tonumber(M) or 0
S = tonumber(S) or 0
else
y = t.year
m = t.month
d = t.day
H = t.hour
M = t.min
S = t.sec
end
local ms = (S - floor(S)) * 10^6
set_u8 (buf, 11)
set_u16(buf, y)
set_u8 (buf, m)
set_u8 (buf, d)
set_u8 (buf, H)
set_u8 (buf, M)
set_u8 (buf, S)
set_u32(buf, ms)
end
local function set_time(buf, t)
local days, H, M, S
if type(t) == 'string' then
local d, rest = t:match'^([+%-%d]+)d (.*)'
days = d and tonumber(d) or 0
t = d and rest or t
H, M, S = t:match'^(%d+):(%d+):([%d.]+)$'
H = tonumber(H)
M = tonumber(M)
S = tonumber(S)
else
days = (t.days or 0) + floor(t.hour / 24)
H = t.hour % 24
M = t.min
S = t.sec
end
local ms = (S - floor(S)) * 10^6
set_u8 (buf, 12)
set_u8 (buf, days < 0 and 1 or 0)
set_u32(buf, math.abs(days))
set_u8 (buf, H)
set_u8 (buf, M)
set_u8 (buf, S)
set_u32(buf, ms)
end
local function set_u8(buf, x)
local p, i = buf(1)
assert(x >= 0 and x < 2^8)
p[i] = x
end
local function set_i8(buf, x)
local p, i = buf(1)
assert(x >= -127 and x <= 128)
ffi.cast(i8_ct, p+i)[0] = x
end
local function set_u24(buf, x)
local p, i = buf(3)
assert(x >= 0 and x < 2^24)
p[i+0] = band( x , 0xff)
p[i+1] = band(shr(x, 8), 0xff)
p[i+2] = band(shr(x, 16), 0xff)
end
local function set_u32(buf, x)
local p, i = buf(4)
assert(x >= 0 and x < 2^32)
ffi.cast(u32_ct, p+i)[0] = x
end
local function set_i32(buf, x)
local p, i = buf(4)
assert(x >= -(2^31-1) and x <= 2^31)
ffi.cast(i32_ct, p+i)[0] = x
end
local function set_u64(buf, x)
local p, i = buf(8)
assert(x >= 0 and x <= 2^52)
ffi.cast(u64_ct, p+i)[0] = x
end
local function set_i64(buf, x)
local p, i = buf(8)
assert(x >= -(2^51-1) and x <= 2^51)
ffi.cast(i64_ct, p+i)[0] = x
end
local function set_f64(buf, x)
local p, i = buf(8)
ffi.cast(f64_ct, p+i)[0] = x
end
local function set_f32(buf, x)
local p, i = buf(4)
ffi.cast(f32_ct, p+i)[0] = x
end
local function set_uint(buf, x) --length-encoded int
assert(x >= 0)
if x < 0xfb then
set_u8(buf, x)
elseif x < 2^16 then
set_u8(buf, 0xfc)
set_u16(buf, x)
elseif x < 2^24 then
set_u8(buf, 0xfd)
set_u24(buf, x)
else
set_u8(buf, 0xfe)
set_u64(buf, x)
end
end
local function set_cstring(buf, s)
local p, i = buf(#s+1)
ffi.copy(p+i, s)
end
local function set_bytes(buf, s, len)
len = len or #s
local p, i = buf(len)
ffi.copy(p+i, s, len)
end
local function set_str(buf, s)
set_uint(#s)
set_bytes(buf, s)
end
local function set_token(buf, password, scramble)
local stage1 = sha1(password)
local stage2 = sha1(stage1)
local stage3 = sha1(scramble .. stage2)
local n = #stage1
set_u8(buf, n)
local p, pi = buf(n)
for i = 1, n do
p[pi+i-1] = xor(stage3:byte(i), stage1:byte(i))
end
end
local function send_buffer(min_capacity)
local arr = dynarray(u8a, min_capacity)
local i = 0
return function(n)
local p = arr(i+n)
i = i + n
return p, i-n
end
end
local function send_packet(self, send_buf)
local send_buf, send_len = send_buf(0)
self.packet_no = self.packet_no + 1
local buf = send_buffer(4)
set_u24(buf, send_len)
set_u8(buf, band(self.packet_no, 0xff))
check_io(self, self.tcp:send(buf(0)))
check_io(self, self.tcp:send(send_buf, send_len))
end
local function recv(self, sz)
local buf = self.buf
if not buf then
buf = buffer'uint8_t[?]'
self.buf = buf
end
local buf = buf(sz)
check_io(self, self.tcp:recvn(buf, sz))
local i = 0
return function(n, err)
n = n or sz-i
checkp(self, i + n <= sz, err or 'short read')
i = i + n
return buf, i-n, n
end
end
local function recv_packet(self)
local buf = recv(self, 4) --packet header
local len = get_u24(buf)
checkp(self, len > 0, 'empty packet')
checkp(self, len <= self.max_packet_size, 'packet too big')
self.packet_no = get_u8(buf)
local buf = recv(self, len)
local field_count = get_u8(buf)
buf(-1) --peek
if field_count == 0x00 then typ = 'OK'
elseif field_count == 0xff then typ = 'ERR'
elseif field_count == 0xfe then typ = 'EOF'
else typ = 'DATA'
end
return typ, buf
end
local function get_name(buf)
local s = get_str(buf)
return s ~= '' and s:lower() or nil
end
local function get_eof_packet(buf)
buf(1) --status: EOF
local warning_count = get_u16(buf)
local status_flags = get_u16(buf)
return warning_count, status_flags
end
local UNSIGNED_FLAG = 32
function mysql.int_range(type, unsigned) --min, max, size
local range = int_ranges[type]
if range then
if unsigned then
return range[4], range[5], range[1]
else
return range[2], range[3], range[1]
end
end
end
function mysql.dec_range(digits, decimals, unsigned) --min, max, digits
local max = 10^(digits - decimals) - 10^-decimals
local min = unsigned and 0 or -max --unsigned decimals is deprecated!
return min, max, digits
end
--This is dumb: there's no such thing as "char length" on a variable-width
--MBCS but that's how you have to declare a varchar these days.
function mysql.char_size(byte_size, collation)
charset = collation:match'^[^_]+'
local mcw = max_char_widths[charset]
return mcw and floor(byte_size / mcw + .5) or byte_size
end
--NOTE: MySQL doesn't give enough metadata to generate a form in a UI,
--you'll have to query `information_schema` to get the rest like enum values
--and defaults. So we gather only what we need for display and for encoding
--params and decoding values in binary form, but not for editing.
local function get_field_packet(buf)
local col = {}
local _ = get_name(buf) --always "def"
col.db = get_name(buf)
col.table_alias = get_name(buf)
col.table = get_name(buf) --name of origin table
col.name = get_name(buf) --alias column name
col.col = get_name(buf) --name of column in origin table
local _ = get_uint(buf) --0x0c
local collation = get_u16(buf) --connection's collation, not field's.
local display_size = get_u32(buf) --in bytes, not in characters.
local buf_type_code = get_u8(buf)
local flags = get_u16(buf)
local decimals = get_u8(buf)
local buf_type = buffer_type_names[buf_type_code]
local mysql_type
if collation == 63 then --binary
mysql_type = bin_types[buf_type] or buf_type
local unsigned = band(flags, UNSIGNED_FLAG) ~= 0 or nil --for val decoding
if mysql_type == 'tinyint' or mysql_type == 'smallint'
or mysql_type == 'mediumint' or mysql_type == 'int'
or mysql_type == 'bigint'
then
col.type = 'number'
col.decimals = 0
col.unsigned = unsigned
elseif mysql_type == 'decimal' then
local digits = display_size - (unsigned and 1 or 2)
col.type = digits > 15 and 'decimal' or 'number'
col.decimals = decimals
col.unsigned = unsigned
elseif mysql_type == 'float' then
col.type = 'number'
elseif mysql_type == 'double' then
col.type = 'number'
elseif mysql_type == 'year' then
col.type = 'number'
elseif mysql_type == 'timestamp' then
col.type = 'date'
col.has_time = true
elseif mysql_type == 'date' then
col.type = 'date'
elseif mysql_type == 'datetime' then
col.type = 'date'
col.has_time = true
elseif mysql_type == 'binary' then
col.padded = true
end
col.display_width = display_size
else
col.type = 'text'
mysql_type = text_types[buf_type] or buf_type
local collation = collation_names[collation]
local charset = collation and collation:match'^[^_]+'
col.mysql_display_collation = collation
col.mysql_display_charset = charset
col.padded = mysql_type == 'char' or nil
--NOTE: mysql gives 4x display_size for tinytext, text and mediumtext
--(but not for longtext) on a utf8mb4 connection. bug?
local mcw = max_char_widths[charset] or 1
if mysql_type == 'text' and display_size <= 16777215 * mcw then
mcw = mcw * mcw
end
col.display_width = ceil(display_size / mcw)
end
col.mysql_display_type = mysql_type
col.mysql_buffer_type = buf_type --for param encoding
col.mysql_buffer_type_code = buf_type_code --for val decoding
return col
end
local function tonum(x) return tonumber(x) end
local function recv_field_packets(self, field_count, field_attrs, opt)
local fields = {}
to_lua = to_lua or self.to_lua
for i = 1, field_count do
local typ, buf = recv_packet(self)
checkp(self, typ == 'DATA', 'bad packet type')
local field = get_field_packet(buf)
field.mysql_to_lua = to_lua or (field.type == 'number' and tonum or nil)
field.index = i
fields[i] = field
fields[field.name] = field
end
if field_count > 0 then
local typ, buf = recv_packet(self)
checkp(self, typ == 'EOF', 'bad packet type')
get_eof_packet(buf)
end
if type(field_attrs) == 'function' then
field_attrs = field_attrs(self, fields, opt)
end
if field_attrs then
for name, attrs in pairs(field_attrs) do
if fields[name] then
update(fields[name], attrs)
end
end
end
return fields
end
local function get_err_packet(buf)
buf(1) --status: ERR