mirror of https://github.com/arendst/Tasmota.git
Add unishox Python
This commit is contained in:
Stephan Hadinger
parent
63d15b68a6
commit
949248fa17
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@ -0,0 +1,496 @@
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cl_95 = [ 0x4000 + 3, 0x3F80 + 11, 0x3D80 + 11, 0x3C80 + 10, 0x3BE0 + 12, 0x3E80 + 10, 0x3F40 + 11, 0x3EC0 + 10, 0x3BA0 + 11, 0x3BC0 + 11, 0x3D60 + 11, 0x3B60 + 11, 0x3A80 + 10, 0x3AC0 + 10, 0x3A00 + 9, 0x3B00 + 10, 0x38C0 + 10, 0x3900 + 10, 0x3940 + 11, 0x3960 + 11, 0x3980 + 11, 0x39A0 + 11, 0x39C0 + 11, 0x39E0 + 12, 0x39F0 + 12, 0x3880 + 10, 0x3CC0 + 10, 0x3C00 + 9, 0x3D00 + 10, 0x3E00 + 9, 0x3F00 + 10, 0x3B40 + 11, 0x3BF0 + 12, 0x2B00 + 8, 0x21C0 + 11, 0x20C0 + 10, 0x2100 + 10, 0x2600 + 7, 0x2300 + 11, 0x21E0 + 12, 0x2140 + 11, 0x2D00 + 8, 0x2358 + 13, 0x2340 + 12, 0x2080 + 10, 0x21A0 + 11, 0x2E00 + 8, 0x2C00 + 8, 0x2180 + 11, 0x2350 + 13, 0x2F80 + 9, 0x2F00 + 9, 0x2A00 + 8, 0x2160 + 11, 0x2330 + 12, 0x21F0 + 12, 0x2360 + 13, 0x2320 + 12, 0x2368 + 13, 0x3DE0 + 12, 0x3FA0 + 11, 0x3DF0 + 12, 0x3D40 + 11, 0x3F60 + 11, 0x3FF0 + 12, 0xB000 + 4, 0x1C00 + 7, 0x0C00 + 6, 0x1000 + 6, 0x6000 + 3, 0x3000 + 7, 0x1E00 + 8, 0x1400 + 7, 0xD000 + 4, 0x3580 + 9, 0x3400 + 8, 0x0800 + 6, 0x1A00 + 7, 0xE000 + 4, 0xC000 + 4, 0x1800 + 7, 0x3500 + 9, 0xF800 + 5, 0xF000 + 5, 0xA000 + 4, 0x1600 + 7, 0x3300 + 8, 0x1F00 + 8, 0x3600 + 9, 0x3200 + 8, 0x3680 + 9, 0x3DA0 + 11, 0x3FC0 + 11, 0x3DC0 + 11, 0x3FE0 + 12 ]
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# enum {SHX_STATE_1 = 1, SHX_STATE_2}; // removed Unicode state
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SHX_STATE_1 = 1
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SHX_STATE_2 = 2
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SHX_SET1 = 0
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SHX_SET1A = 1
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SHX_SET1B = 2
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SHX_SET2 = 3
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SHX_SET3 = 4
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SHX_SET4 = 5
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SHX_SET4A = 6
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# char sets[][11] PROGMEM =
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# {{ 0, ' ', 'e', 0, 't', 'a', 'o', 'i', 'n', 's', 'r'},
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# { 0, 'l', 'c', 'd', 'h', 'u', 'p', 'm', 'b', 'g', 'w'},
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# {'f', 'y', 'v', 'k', 'q', 'j', 'x', 'z', 0, 0, 0},
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# { 0, '9', '0', '1', '2', '3', '4', '5', '6', '7', '8'},
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# {'.', ',', '-', '/', '?', '+', ' ', '(', ')', '$', '@'},
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# {';', '#', ':', '<', '^', '*', '"', '{', '}', '[', ']'},
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# {'=', '%', '\'', '>', '&', '_', '!', '\\', '|', '~', '`'}};
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sets = [[ 0, ' ', 'e', 0, 't', 'a', 'o', 'i', 'n', 's', 'r'],
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[ 0, 'l', 'c', 'd', 'h', 'u', 'p', 'm', 'b', 'g', 'w'],
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['f', 'y', 'v', 'k', 'q', 'j', 'x', 'z', 0, 0, 0],
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[ 0, '9', '0', '1', '2', '3', '4', '5', '6', '7', '8'],
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['.', ',', '-', '/', '?', '+', ' ', '(', ')', '$', '@'],
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[';', '#', ':', '<', '^', '*', '"', '{', '}', '[', ']'],
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['=', '%', '\'', '>', '&', '_', '!', '\\', '|', '~', '`']]
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us_vcode = [2 + (0 << 3), 3 + (3 << 3), 3 + (1 << 3), 4 + (6 << 3), 0,
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# 5, 6, 7, 8, 9, 10
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4 + (4 << 3), 3 + (2 << 3), 4 + (8 << 3), 0, 0, 0,
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# 11, 12, 13, 14, 15
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4 + (7 << 3), 0, 4 + (5 << 3), 0, 5 + (9 << 3),
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# 16, 17, 18, 19, 20, 21, 22, 23
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0, 0, 0, 0, 0, 0, 0, 0,
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# 24, 25, 26, 27, 28, 29, 30, 31
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0, 0, 0, 0, 0, 0, 0, 5 + (10 << 3) ]
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# 0, 1, 2, 3, 4, 5, 6, 7,
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us_hcode = [1 + (1 << 3), 2 + (0 << 3), 0, 3 + (2 << 3), 0, 0, 0, 5 + (3 << 3),
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# 8, 9, 10, 11, 12, 13, 14, 15,
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0, 0, 0, 0, 0, 0, 0, 5 + (5 << 3),
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# 16, 17, 18, 19, 20, 21, 22, 23
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0, 0, 0, 0, 0, 0, 0, 5 + (4 << 3),
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# 24, 25, 26, 27, 28, 29, 30, 31
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0, 0, 0, 0, 0, 0, 0, 5 + (6 << 3) ]
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ESCAPE_MARKER = 0x2A
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TERM_CODE = 0x37C0
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TERM_CODE_LEN = 10
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DICT_CODE = 0x0000
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DICT_CODE_LEN = 5
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DICT_OTHER_CODE = 0x0000
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DICT_OTHER_CODE_LEN = 6
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RPT_CODE_TASMOTA = 0x3780
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RPT_CODE_TASMOTA_LEN = 10
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BACK2_STATE1_CODE = 0x2000
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BACK2_STATE1_CODE_LEN = 4
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BACK_FROM_UNI_CODE = 0xFE00
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BACK_FROM_UNI_CODE_LEN = 8
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LF_CODE = 0x3700
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LF_CODE_LEN = 9
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TAB_CODE = 0x2400
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TAB_CODE_LEN = 7
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ALL_UPPER_CODE = 0x2200
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ALL_UPPER_CODE_LEN = 8
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SW2_STATE2_CODE = 0x3800
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SW2_STATE2_CODE_LEN = 7
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ST2_SPC_CODE = 0x3B80
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ST2_SPC_CODE_LEN = 11
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BIN_CODE_TASMOTA = 0x8000
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BIN_CODE_TASMOTA_LEN = 3
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NICE_LEN = 5
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mask = [ 0x80, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC, 0xFE, 0xFF ]
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# Input
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# out = bytearray
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def append_bits(out, ol, code, clen, state):
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#print("Append bits {ol} {code} {clen} {state}".format(ol=ol, code=code, clen=clen, state=state))
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if (state == SHX_STATE_2):
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# remove change state prefix
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if ((code >> 9) == 0x1C):
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code <<= 7
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clen -= 7
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while (clen > 0):
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cur_bit = ol % 8
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blen = 8 if (clen > 8) else clen
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a_byte = (code >> 8) & mask[blen - 1]
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#print("append_bits a_byte {ab} blen {blen}".format(ab=a_byte,blen=blen))
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a_byte >>= cur_bit
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if (blen + cur_bit > 8):
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blen = (8 - cur_bit)
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if (cur_bit == 0):
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out[ol // 8] = a_byte
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else:
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out[ol // 8] |= a_byte
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code <<= blen
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ol += blen
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if (0 == ol % 8):
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# we completed a full byte
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last_c = out[(ol // 8) - 1]
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if ((0 == last_c) or (ESCAPE_MARKER == last_c)):
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out[ol // 8] = 1 + last_c # increment to 0x01 or 0x2B
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out[(ol // 8) -1] = ESCAPE_MARKER # replace old value with marker
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ol += 8 # add one full byte
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clen -= blen;
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return ol
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codes = [ 0x82, 0xC3, 0xE5, 0xED, 0xF5 ]
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bit_len = [ 5, 7, 9, 12, 16 ]
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def encodeCount(out, ol, count):
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#print("encodeCount ol = {ol}, count = {count}".format(ol=ol, count=count))
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till = 0
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base = 0
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for i in range(len(bit_len)):
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bit_len_i = bit_len[i]
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till += (1 << bit_len_i)
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if (count < till):
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codes_i = codes[i]
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ol = append_bits(out, ol, (codes_i & 0xF8) << 8, codes_i & 0x07, 1)
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#print("encodeCount append_bits ol = {ol}, code = {code}, len = {len}".format(ol=ol,code=(codes_i & 0xF8) << 8,len=codes_i & 0x07))
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ol = append_bits(out, ol, (count - base) << (16 - bit_len_i), bit_len_i, 1)
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#print("encodeCount append_bits ol = {ol}, code = {code}, len = {len}".format(ol=ol,code=(count - base) << (16 - bit_len_i),len=bit_len_i))
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return ol
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base = till
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return ol
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# Returns (int, ol, state, is_all_upper)
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def matchOccurance(inn, lenn, l, out, ol, state, is_all_upper):
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#int matchOccurance(const char *in, int len, int l, char *out, int *ol, byte *state, byte *is_all_upper) {
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# int j, k;
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longest_dist = 0
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longest_len = 0
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#for (j = l - NICE_LEN; j >= 0; j--) {
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j = l - NICE_LEN
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while (j >= 0):
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k = l
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#for (k = l; k < len && j + k - l < l; k++) {
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while ((k < lenn) and (j + k - l < l)):
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if (inn[k] != inn[j + k - l]):
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break
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k += 1
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if (k - l > NICE_LEN - 1):
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match_len = k - l - NICE_LEN
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match_dist = l - j - NICE_LEN + 1
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if (match_len > longest_len):
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longest_len = match_len
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longest_dist = match_dist
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j -= 1
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if (longest_len):
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#print("longest_len {ll}".format(ll=longest_len))
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ol_save = ol
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if (state == SHX_STATE_2 or is_all_upper):
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is_all_upper = 0
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state = SHX_STATE_1
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ol = append_bits(out, ol, BACK2_STATE1_CODE, BACK2_STATE1_CODE_LEN, state)
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ol = append_bits(out, ol, DICT_CODE, DICT_CODE_LEN, 1)
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ol = encodeCount(out, ol, longest_len)
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ol = encodeCount(out, ol, longest_dist)
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#print("longest_len {ll} longest_dist {ld} ol {ols}-{ol}".format(ll=longest_len, ld=longest_dist, ol=ol, ols=ol_save))
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l += longest_len + NICE_LEN
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l -= 1
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return l, ol, state, is_all_upper
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return -l, ol, state, is_all_upper
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def unishox_compress(inn, len, out, len_out):
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# int32_t unishox_compress(const char *in, size_t len, char *out, size_t len_out) {
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ol = 0
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state = SHX_STATE_1
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is_all_upper = 0
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l = 0
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while (l < len):
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# for (l=0; l<len; l++) {
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c_in = inn[l]
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if (l and l < len - 4):
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if (c_in == inn[l - 1] and c_in == inn[l + 1] and c_in == inn[l + 2] and c_in == inn[l + 3]):
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rpt_count = l + 4
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while (rpt_count < len and inn[rpt_count] == c_in):
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rpt_count += 1
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rpt_count -= l
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if (state == SHX_STATE_2 or is_all_upper):
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is_all_upper = 0
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state = SHX_STATE_1
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ol = append_bits(out, ol, BACK2_STATE1_CODE, BACK2_STATE1_CODE_LEN, state) # back to lower case and Set1
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ol = append_bits(out, ol, RPT_CODE_TASMOTA, RPT_CODE_TASMOTA_LEN, 1) # reusing CRLF for RPT
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ol = encodeCount(out, ol, rpt_count - 4)
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l += rpt_count
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#l -= 1
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continue
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if (l < (len - NICE_LEN + 1)):
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l_old = l
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(l, ol, state, is_all_upper) = matchOccurance(inn, len, l, out, ol, state, is_all_upper)
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if (l > 0):
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#print("matchOccurance l = {l} l_old = {lo}".format(l=l,lo=l_old))
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l += 1 # for loop
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continue
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l = -l
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if (state == SHX_STATE_2): # if Set2
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if ((c_in >= ord(' ') and c_in <= ord('@')) or (c_in >= ord('[') and c_in <= ord('`')) or (c_in >= ord('{') and c_in <= ord('~'))):
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pass
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else:
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state = SHX_STATE_1 # back to Set1 and lower case
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ol = append_bits(out, ol, BACK2_STATE1_CODE, BACK2_STATE1_CODE_LEN, state)
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is_upper = 0
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if (c_in >= ord('A') and c_in <= ord('Z')):
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is_upper = 1
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else:
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if (is_all_upper):
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is_all_upper = 0
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ol = append_bits(out, ol, BACK2_STATE1_CODE, BACK2_STATE1_CODE_LEN, state)
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c_next = 0
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if (l+1 < len):
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c_next = inn[l+1]
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if (c_in >= 32 and c_in <= 126):
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if (is_upper and not is_all_upper):
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ll=l+5
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# for (ll=l+5; ll>=l && ll<len; ll--) {
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while (ll>=l and ll<len):
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if (inn[ll] < ord('A') or inn[ll] > ord('Z')):
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break
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ll -= 1
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if (ll == l-1):
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ol = append_bits(out, ol, ALL_UPPER_CODE, ALL_UPPER_CODE_LEN, state) # CapsLock
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is_all_upper = 1;
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if (state == SHX_STATE_1 and c_in >= ord('0') and c_in <= ord('9')):
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ol = append_bits(out, ol, SW2_STATE2_CODE, SW2_STATE2_CODE_LEN, state) # Switch to sticky Set2
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state = SHX_STATE_2
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c_in -= 32
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if (is_all_upper and is_upper):
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c_in += 32
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if (c_in == 0 and state == SHX_STATE_2):
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ol = append_bits(out, ol, ST2_SPC_CODE, ST2_SPC_CODE_LEN, state) # space from Set2 ionstead of Set1
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else:
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# ol = append_bits(out, ol, pgm_read_word(&c_95[c_in]), pgm_read_byte(&l_95[c_in]), state); // original version with c/l in split arrays
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cl = cl_95[c_in]
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ol = append_bits(out, ol, cl & 0xFFF0, cl & 0x000F, state)
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#lse:
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# // if (c_in == 13 && c_next == 10) { // CRLF disabled
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# // ol = append_bits(out, ol, CRLF_CODE, CRLF_CODE_LEN, state); // CRLF
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# // l++;
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# // } else
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elif (c_in == 10):
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ol = append_bits(out, ol, LF_CODE, LF_CODE_LEN, state) # LF
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elif (c_in == '\t'):
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ol = append_bits(out, ol, TAB_CODE, TAB_CODE_LEN, state) # TAB
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else:
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ol = append_bits(out, ol, BIN_CODE_TASMOTA, BIN_CODE_TASMOTA_LEN, state) # Binary, we reuse the Unicode marker which 3 bits instead of 9
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ol = encodeCount(out, ol, (255 - c_in) & 0xFF)
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# check that we have some headroom in the output buffer
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if (ol // 8 >= len_out - 4):
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return -1 # we risk overflow and crash
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l += 1
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bits = ol % 8
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if (bits):
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ol = append_bits(out, ol, TERM_CODE, 8 - bits, 1) # 0011 0111 1100 0000 TERM = 0011 0111 11
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return (ol + 7) // 8
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# return ol // 8 + 1 if (ol%8) else 0
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def getBitVal(inn, bit_no, count):
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c_in = inn[bit_no >> 3]
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if ((bit_no >> 3) and (ESCAPE_MARKER == inn[(bit_no >> 3) - 1])):
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c_in -= 1
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r = 1 << count if (c_in & (0x80 >> (bit_no % 8))) else 0
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#print("getBitVal r={r}".format(r=r))
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return r
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# Returns:
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# 0..11
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# or -1 if end of stream
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def getCodeIdx(code_type, inn, len, bit_no_p):
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code = 0
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count = 0
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while (count < 5):
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# detect marker
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if (ESCAPE_MARKER == inn[bit_no_p >> 3]):
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bit_no_p += 8 # skip marker
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if (bit_no_p >= len):
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return -1, bit_no_p
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code += getBitVal(inn, bit_no_p, count)
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bit_no_p += 1
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count += 1
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code_type_code = code_type[code]
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if (code_type_code and (code_type_code & 0x07) == count):
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#print("getCodeIdx = {r}".format(r=code_type_code >> 3))
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return code_type_code >> 3, bit_no_p
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#print("getCodeIdx not found = {r}".format(r=1))
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return 1, bit_no_p
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def getNumFromBits(inn, bit_no, count):
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ret = 0
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while (count):
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count -= 1
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if (ESCAPE_MARKER == inn[bit_no >> 3]):
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bit_no += 8 # skip marker
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ret += getBitVal(inn, bit_no, count)
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bit_no += 1
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return ret
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def readCount(inn, bit_no_p, len):
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(idx, bit_no_p) = getCodeIdx(us_hcode, inn, len, bit_no_p)
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if (idx >= 1): idx -= 1; # we skip v = 1 (code '0') since we no more accept 2 bits encoding
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if ((idx >= 5) or (idx < 0)): return 0, bit_no_p # unsupported or end of stream
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till = 0
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bit_len_idx = 0
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base = 0
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#for (uint32_t i = 0; i <= idx; i++) {
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i = 0
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while (i <= idx):
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# for i in range(idx):
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base = till
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bit_len_idx = bit_len[i]
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till += (1 << bit_len_idx)
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i += 1
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count = getNumFromBits(inn, bit_no_p, bit_len_idx) + base
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#print("readCount getNumFromBits = {count} ({bl})".format(count=count,bl=bit_len_idx))
|
||||
|
||||
bit_no_p += bit_len_idx
|
||||
return count, bit_no_p
|
||||
|
||||
|
||||
def decodeRepeat(inn, len, out, ol, bit_no):
|
||||
#print("decodeRepeat Enter")
|
||||
(dict_len, bit_no) = readCount(inn, bit_no, len)
|
||||
dict_len += NICE_LEN
|
||||
(dist, bit_no) = readCount(inn, bit_no, len)
|
||||
dist += NICE_LEN - 1
|
||||
#memcpy(out + ol, out + ol - dist, dict_len);
|
||||
i = 0
|
||||
while (i < dict_len):
|
||||
#for i in range(dict_len):
|
||||
out[ol + i] = out[ol - dist + i]
|
||||
i += 1
|
||||
ol += dict_len
|
||||
|
||||
return ol, bit_no
|
||||
|
||||
def unishox_decompress(inn, len, out, len_out):
|
||||
ol = 0
|
||||
bit_no = 0
|
||||
dstate = SHX_SET1
|
||||
is_all_upper = 0
|
||||
|
||||
len <<= 3 # *8, len in bits
|
||||
out[ol] = 0
|
||||
while (bit_no < len):
|
||||
c = 0
|
||||
is_upper = is_all_upper
|
||||
orig_bit_no = bit_no
|
||||
(v, bit_no) = getCodeIdx(us_vcode, inn, len, bit_no) # read vCode
|
||||
#print("bit_no {b}. v = {v}".format(b=bit_no,v=v))
|
||||
if (v < 0): break # end of stream
|
||||
h = dstate # Set1 or Set2
|
||||
if (v == 0): # Switch which is common to Set1 and Set2, first entry
|
||||
(h, bit_no) = getCodeIdx(us_hcode, inn, len, bit_no) # read hCode
|
||||
#print("bit_no {b}. h = {h}".format(b=bit_no,h=h))
|
||||
if (h < 0): break # end of stream
|
||||
if (h == SHX_SET1): # target is Set1
|
||||
if (dstate == SHX_SET1): # Switch from Set1 to Set1 us UpperCase
|
||||
if (is_all_upper): # if CapsLock, then back to LowerCase
|
||||
is_upper = 0
|
||||
is_all_upper = 0
|
||||
continue
|
||||
|
||||
(v, bit_no) = getCodeIdx(us_vcode, inn, len, bit_no) # read again vCode
|
||||
if (v < 0): break # end of stream
|
||||
if (v == 0):
|
||||
(h, bit_no) = getCodeIdx(us_hcode, inn, len, bit_no) # read second hCode
|
||||
if (h < 0): break # end of stream
|
||||
if (h == SHX_SET1): # If double Switch Set1, the CapsLock
|
||||
is_all_upper = 1
|
||||
continue
|
||||
|
||||
is_upper = 1 # anyways, still uppercase
|
||||
else:
|
||||
dstate = SHX_SET1 # if Set was not Set1, switch to Set1
|
||||
continue
|
||||
|
||||
elif (h == SHX_SET2): # If Set2, switch dstate to Set2
|
||||
if (dstate == SHX_SET1): # TODO: is this test useful, there are only 2 states possible
|
||||
dstate = SHX_SET2
|
||||
continue
|
||||
|
||||
if (h != SHX_SET1): # all other Sets (why not else)
|
||||
(v, bit_no) = getCodeIdx(us_vcode, inn, len, bit_no) # we changed set, now read vCode for char
|
||||
if (v < 0): break # end of stream
|
||||
|
||||
if (v == 0 and h == SHX_SET1A):
|
||||
#print("v = 0, h = SHX_SET1A")
|
||||
if (is_upper):
|
||||
(temp, bit_no) = readCount(inn, bit_no, len)
|
||||
out[ol] = 255 - temp # binary
|
||||
ol += 1
|
||||
else:
|
||||
(ol, bit_no) = decodeRepeat(inn, len, out, ol, bit_no) # dist
|
||||
continue
|
||||
|
||||
if (h == SHX_SET1 and v == 3):
|
||||
# was Unicode, will do Binary instead
|
||||
(temp, bit_no) = readCount(inn, bit_no, len)
|
||||
out[ol] = 255 - temp # binary
|
||||
ol += 1
|
||||
continue
|
||||
|
||||
if (h < 7 and v < 11): # TODO: are these the actual limits? Not 11x7 ?
|
||||
#print("h {h} v {v}".format(h=h,v=v))
|
||||
c = ord(sets[h][v]) # TODO
|
||||
if (c >= ord('a') and c <= ord('z')):
|
||||
if (is_upper):
|
||||
c -= 32 # go to UpperCase for letters
|
||||
else: # handle all other cases
|
||||
if (is_upper and dstate == SHX_SET1 and v == 1):
|
||||
c = ord('\t') # If UpperCase Space, change to TAB
|
||||
if (h == SHX_SET1B):
|
||||
if (8 == v): # was LF or RPT, now only LF
|
||||
out[ol] = ord('\n')
|
||||
ol += 1
|
||||
continue
|
||||
|
||||
if (9 == v): # was CRLF, now RPT
|
||||
(count, bit_no) = readCount(inn, bit_no, len)
|
||||
count += 4
|
||||
if (ol + count >= len_out):
|
||||
return -1 # overflow
|
||||
|
||||
rpt_c = out[ol - 1]
|
||||
while (count):
|
||||
count -= 1
|
||||
out[ol] = rpt_c
|
||||
ol += 1
|
||||
continue
|
||||
|
||||
if (10 == v):
|
||||
break # TERM, stop decoding
|
||||
|
||||
out[ol] = c
|
||||
ol += 1
|
||||
|
||||
if (ol >= len_out):
|
||||
return -1 # overflow
|
||||
|
||||
return ol
|
||||
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
inn = bytearray(b'ON Switch1#State==1 DO Add1 1 ENDON ON Var1#State==0 DO ShutterStop1 ENDON ON Var1#State==1 DO ShutterClose1 ENDON ON Var1#State>=2 DO Var1 0 ENDON ON Shutter1#Close DO Var1 0 ENDON ON Switch2#State==1 DO Add2 1 ENDON ON Var2#State==0 DO ShutterStop1 ENDON ON Var2#State==1 DO ShutterOpen1 ENDON ON Var2#State>=2 DO Var2 0 ENDON ON Shutter1#Open DO Var2 0 ENDON')
|
||||
b = bytearray(2048)
|
||||
l = unishox_compress(inn, len(inn), b, len(b))
|
||||
print("Compressed from {fromm} to {to} ({p}%)".format(fromm=len(inn),to=l,p=(100-l/len(inn)*100)))
|
||||
|
||||
out = bytearray(2048)
|
||||
l = unishox_decompress(b, l, out, len(out))
|
||||
Loading…
Reference in New Issue