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zint_composite.pas
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zint_composite.pas
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unit zint_composite;
{
Based on Zint (done by Robin Stuart and the Zint team)
http://github.com/zint/zint
Translation by TheUnknownOnes
http://theunknownones.net
License: Apache License 2.0
Status:
3432bc9aff311f2aea40f0e9883abfe6564c080b work in progress
}
{$IFDEF FPC}
{$mode objfpc}{$H+}
{$ENDIF}
interface
uses
SysUtils, zint;
function composite(symbol : zint_symbol; source : TArrayOfByte; _length : Integer) : Integer;
implementation
uses
zint_common, zint_pdf417, zint_rss, zint_helper, zint_gs1, zint_code128,
zint_upcean;
const _NUMERIC = #110;
const _ALPHA = #97;
const ISOIEC = #105;
const INVALID_CHAR = #100;
const ANY_ENC = #120;
const _ALPHA_OR_ISO = #121;
{ CC-A component coefficients from ISO/IEC 24728:2006 Annex F }
const ccaCoeffs : array[0..29] of Integer = (
{ k = 4 }
522, 568, 723, 809,
{ k = 5 }
427, 919, 460, 155, 566,
{ k = 6 }
861, 285, 19, 803, 17, 766,
{ k = 7 }
76, 925, 537, 597, 784, 691, 437,
{ k = 8 }
237, 308, 436, 284, 646, 653, 428, 379
);
{ rows, error codewords, k-offset of valid CC-A sizes from ISO/IEC 24723:2006 Table 9 }
const ccaVariants : array[0..50] of Integer = (
5, 6, 7, 8, 9, 10, 12, 4, 5, 6, 7, 8, 3, 4, 5, 6, 7,
4, 4, 5, 5, 6, 6, 7, 4, 5, 6, 7, 7, 4, 5, 6, 7, 8,
0, 0, 4, 4, 9, 9, 15, 0, 4, 9, 15, 15, 0, 4, 9, 15, 22
);
{ following is Left RAP, Centre RAP, Right RAP and Start Cluster from ISO/IEC 24723:2006 tables 10 and 11 }
const aRAPTable : array[0..67] of Integer = (
39, 1, 32, 8, 14, 43, 20, 11, 1, 5, 15, 21, 40, 43, 46, 34, 29,
0, 0, 0, 0, 0, 0, 0, 43, 33, 37, 47, 1, 20, 23, 26, 14, 9,
19, 33, 12, 40, 46, 23, 52, 23, 13, 17, 27, 33, 52, 3, 6, 46, 41,
6, 0, 3, 3, 3, 0, 3, 3, 0, 3, 6, 6, 0, 0, 0, 0, 3
);
type
TGlobalpwr928 = array[0..68] of array[0..6] of Word;
function _min(first : Integer; second : Integer) : Integer;
begin
if (first <= second) then
result := first
else
result := second;
end;
{ gets bit in bitString at bitPos }
function getBit(var bitStr : TArrayOfWord; bitPos : Integer) : Integer;
begin
if (bitStr[bitPos shr 4] and ($8000 shr (bitPos and 15))) <> 0 then
result := 1
else
result := 0;
end;
{ initialize pwr928 encoding table }
procedure init928(var pwr928 : TGlobalpwr928);
var
i, j, v : Integer;
cw : array[0..6] of Integer;
begin
cw[6] := 1;
for i := 5 downto 0 do
cw[i] := 0;
for i := 0 to 6 do
pwr928[0][i] := cw[i];
for j := 1 to 68 do
begin
v := 0;
for i := 6 downto 1 do
begin
v := (2 * cw[i]) + (v div 928);
pwr928[j][i] := v mod 928;
cw[i] := v mod 928;
end;
pwr928[j][0] := (2 * cw[0]) + (v div 928);
cw[0] := (2 * cw[0]) + (v div 928);
end;
end;
{ converts bit string to base 928 values, codeWords[0] is highest order }
function encode928(bitString : TArrayOfWord; var codeWords : TArrayOfWord; bitLng : Integer; var pwr928 : TGlobalpwr928) : Integer;
var
i, j, b, bitCnt, cwNdx, cwCnt, cwLng : Integer;
begin
cwNdx := 0; cwLng := 0; b := 0;
while b < bitLng do
begin
bitCnt := _min(bitLng-b, 69);
cwCnt := bitCnt div 10 + 1;
Inc(cwLng, cwCnt);
for i := 0 to cwCnt - 1 do
codeWords[cwNdx + i] := 0; { init 0 }
for i := 0 to bitCnt - 1 do
begin
if (getBit(bitString, b + bitCnt - i - 1) <> 0) then
begin
for j := 0 to cwCnt - 1 do
Inc(codeWords[cwNdx + j], pwr928[i][j + 7 - cwCnt]);
end;
end;
for i := cwCnt - 1 downto 1 do
begin
{ add 'carries' }
Inc(codeWords[cwNdx + i - 1], codeWords[cwNdx + i] div 928);
codeWords[cwNdx + i] := codeWords[cwNdx + i] mod 928;
end;
Inc(b, 69);
Inc(cwNdx, 7);
end;
result :=cwLng; exit;
end;
{ CC-A 2D component }
function cc_a(symbol : zint_symbol; source : TArrayOfChar; cc_width : Integer) : Integer;
var
i, strpos, segment, bitlen, cwCnt, variant, rows : Integer;
k, offset, j, total : Integer;
rsCodeWords : array[0..7] of Integer;
LeftRAPStart, RightRAPStart, CentreRAPStart, StartCluster : Integer;
LeftRAP, RightRAP, CentreRAP, Cluster : Integer;
dummy : array[0..4] of Integer;
writer, flip, loop : Integer;
codeWords, bitStr : TArrayOfWord;
codebarre, pattern : TArrayOfChar;
local_source : TArrayOfChar; { A copy of source but with padding zeroes to make 208 bits }
pwr928 : TGlobalpwr928;
begin
SetLength(codebarre, 100);
SetLength(pattern, 580);
SetLength(local_source, 210);
SetLength(codeWords, 28);
SetLength(bitStr, 13);
variant := 0;
for i := 0 to 12 do bitStr[i] := 0;
for i := 0 to 27 do codeWords[i] := 0;
bitlen := strlen(source);
for i := 0 to 207 do local_source[i] := '0';
for i := 0 to bitlen - 1 do local_source[i] := source[i];
local_source[208] := #0;
for segment := 0 to 12 do
begin
strpos := segment * 16;
if (local_source[strpos] = '1') then Inc(bitStr[segment], $8000);
if (local_source[strpos + 1] = '1') then Inc(bitStr[segment], $4000);
if (local_source[strpos + 2] = '1') then Inc(bitStr[segment], $2000);
if (local_source[strpos + 3] = '1') then Inc(bitStr[segment], $1000);
if (local_source[strpos + 4] = '1') then Inc(bitStr[segment], $800);
if (local_source[strpos + 5] = '1') then Inc(bitStr[segment], $400);
if (local_source[strpos + 6] = '1') then Inc(bitStr[segment], $200);
if (local_source[strpos + 7] = '1') then Inc(bitStr[segment], $100);
if (local_source[strpos + 8] = '1') then Inc(bitStr[segment], $80);
if (local_source[strpos + 9] = '1') then Inc(bitStr[segment], $40);
if (local_source[strpos + 10] = '1') then Inc(bitStr[segment], $20);
if (local_source[strpos + 11] = '1') then Inc(bitStr[segment], $10);
if (local_source[strpos + 12] = '1') then Inc(bitStr[segment], $08);
if (local_source[strpos + 13] = '1') then Inc(bitStr[segment], $04);
if (local_source[strpos + 14] = '1') then Inc(bitStr[segment], $02);
if (local_source[strpos + 15] = '1') then Inc(bitStr[segment], $01);
end;
init928(pwr928);
{ encode codeWords from bitStr }
cwCnt := encode928(bitStr, codeWords, bitlen, pwr928);
case cc_width of
2:
case cwCnt of
6: variant := 0;
8: variant := 1;
9: variant := 2;
11: variant := 3;
12: variant := 4;
14: variant := 5;
17: variant := 6;
end;
3:
case cwCnt of
8: variant := 7;
10: variant := 8;
12: variant := 9;
14: variant := 10;
17: variant := 11;
end;
4:
case cwCnt of
8: variant := 12;
11: variant := 13;
14: variant := 14;
17: variant := 15;
20: variant := 16;
end;
end;
rows := ccaVariants[variant];
k := ccaVariants[17 + variant];
offset := ccaVariants[34 + variant];
{ Reed-Solomon error correction }
for i := 0 to 7 do
rsCodeWords[i] := 0;
//total := 0;
for i := 0 to cwCnt - 1 do
begin
total := (codeWords[i] + rsCodeWords[k - 1]) mod 929;
for j := k - 1 downto 0 do
begin
if (j = 0) then
rsCodeWords[j] := (929 - (total * ccaCoeffs[offset + j]) mod 929) mod 929
else
rsCodeWords[j] := (rsCodeWords[j - 1] + 929 - (total * ccaCoeffs[offset + j]) mod 929) mod 929;
end;
end;
for j := 0 to k - 1 do
if (rsCodeWords[j] <> 0) then rsCodeWords[j] := 929 - rsCodeWords[j];
for i := k - 1 downto 0 do
begin
codeWords[cwCnt] := rsCodeWords[i];
Inc(cwCnt);
end;
{ Place data into table }
LeftRAPStart := aRAPTable[variant];
CentreRAPStart := aRAPTable[variant + 17];
RightRAPStart := aRAPTable[variant + 34];
StartCluster := aRAPTable[variant + 51] div 3;
LeftRAP := LeftRAPStart;
CentreRAP := CentreRAPStart;
RightRAP := RightRAPStart;
Cluster := StartCluster; { Cluster can be 0, 1 or 2 for Cluster(0), Cluster(3) and Cluster(6) }
for i := 0 to rows - 1 do
begin
strcpy(codebarre, '');
offset := 929 * Cluster;
for j := 0 to 4 do
dummy[j] := 0;
for j := 0 to cc_width - 1 do
dummy[j + 1] := codeWords[i * cc_width + j];
{ Copy the data into codebarre }
concat(codebarre, RAPLR[LeftRAP]);
concat(codebarre, '1');
concat(codebarre, codagemc[offset + dummy[1]]);
concat(codebarre, '1');
if (cc_width = 3) then
concat(codebarre, RAPC[CentreRAP]);
if (cc_width >= 2) then
begin
concat(codebarre, '1');
concat(codebarre, codagemc[offset + dummy[2]]);
concat(codebarre, '1');
end;
if (cc_width = 4) then
concat(codebarre, RAPC[CentreRAP]);
if (cc_width >= 3) then
begin
concat(codebarre, '1');
concat(codebarre, codagemc[offset + dummy[3]]);
concat(codebarre, '1');
end;
if (cc_width = 4) then
begin
concat(codebarre, '1');
concat(codebarre, codagemc[offset + dummy[4]]);
concat(codebarre, '1');
end;
concat(codebarre, RAPLR[RightRAP]);
concat(codebarre, '1'); { stop }
{ Now codebarre is a mixture of letters and numbers }
writer := 0;
flip := 1;
strcpy(pattern, '');
for loop := 0 to strlen(codebarre) - 1 do
begin
if ((codebarre[loop] >= '0') and (codebarre[loop] <= '9')) then
begin
for k := 0 to ctoi(codebarre[loop]) - 1 do
begin
if (flip = 0) then
pattern[writer] := '0'
else
pattern[writer] := '1';
Inc(writer);
end;
pattern[writer] := #0;
if (flip = 0) then
flip := 1
else
flip := 0;
end
else
begin
lookup(BRSET, PDFttf, codebarre[loop], pattern);
Inc(writer, 5);
end;
end;
symbol.width := writer;
{ so now pattern[] holds the string of '1's and '0's. - copy this to the symbol }
for loop := 0 to strlen(pattern) - 1 do
if (pattern[loop] = '1') then set_module(symbol, i, loop);
symbol.row_height[i] := 2;
Inc(symbol.rows);
{ Set up RAPs and Cluster for next row }
Inc(LeftRAP);
Inc(CentreRAP);
Inc(RightRAP);
Inc(Cluster);
if (LeftRAP = 53) then
LeftRAP := 1;
if (CentreRAP = 53) then
CentreRAP := 1;
if (RightRAP = 53) then
RightRAP := 1;
if (Cluster = 3) then
Cluster := 0;
end;
Result := 0; exit;
end;
{ CC-B 2D component }
function cc_b(symbol : zint_symbol; source : TArrayOfChar; cc_width : Integer) : Integer;
var
_length, i, binloc : Integer;
data_string : TArrayOfByte;
chainemc : TArrayOfInteger;
mc_length : Integer;
k, j, longueur, offset : Integer;
mccorrection : array[0..49] of Integer;
total : Integer;
dummy : array[0..4] of Integer;
codebarre, pattern : TArrayOfChar;
variant, LeftRAPStart, CentreRAPStart, RightRAPStart, StartCluster : Integer;
LeftRAP, CentreRAP, RightRAP, Cluster, writer, flip, loop : Integer;
begin
SetLength(data_string, (strlen(source) div 8) + 3);
SetLength(chainemc, 180);
SetLength(codebarre, 100);
SetLength(pattern, 580);
_length := strlen(source) div 8;
for i := 0 to _length - 1 do
begin
binloc := i * 8;
data_string[i] := 0;
if (source[binloc] = '1') then Inc(data_string[i], $80);
if (source[binloc + 1] = '1') then Inc(data_string[i], $40);
if (source[binloc + 2] = '1') then Inc(data_string[i], $20);
if (source[binloc + 3] = '1') then Inc(data_string[i], $10);
if (source[binloc + 4] = '1') then Inc(data_string[i], $08);
if (source[binloc + 5] = '1') then Inc(data_string[i], $04);
if (source[binloc + 6] = '1') then Inc(data_string[i], $02);
if (source[binloc + 7] = '1') then Inc(data_string[i], $01);
end;
mc_length := 0;
{ 'the CC-B component shall have codeword 920 in the first symbol character position' (section 9a) }
chainemc[mc_length] := 920;
Inc(mc_length);
byteprocess(chainemc, mc_length, data_string, 0, _length, 0);
{ Now figure out which variant of the symbol to use and load values accordingly }
variant := 0;
if (cc_width = 2) then
begin
variant := 13;
if (mc_length <= 33) then variant := 12;
if (mc_length <= 29) then variant := 11;
if (mc_length <= 24) then variant := 10;
if (mc_length <= 19) then variant := 9;
if (mc_length <= 13) then variant := 8;
if (mc_length <= 8) then variant := 7;
end;
if (cc_width = 3) then
begin
variant := 23;
if (mc_length <= 70) then variant := 22;
if (mc_length <= 58) then variant := 21;
if (mc_length <= 46) then variant := 20;
if (mc_length <= 34) then variant := 19;
if (mc_length <= 24) then variant := 18;
if (mc_length <= 18) then variant := 17;
if (mc_length <= 14) then variant := 16;
if (mc_length <= 10) then variant := 15;
if (mc_length <= 6) then variant := 14;
end;
if (cc_width = 4) then
begin
variant := 34;
if (mc_length <= 108) then variant := 33;
if (mc_length <= 90) then variant := 32;
if (mc_length <= 72) then variant := 31;
if (mc_length <= 54) then variant := 30;
if (mc_length <= 39) then variant := 29;
if (mc_length <= 30) then variant := 28;
if (mc_length <= 24) then variant := 27;
if (mc_length <= 18) then variant := 26;
if (mc_length <= 12) then variant := 25;
if (mc_length <= 8) then variant := 24;
end;
{ Now we have the variant we can load the data - from here on the same as MicroPDF417 code }
Dec(variant);
symbol.option_2 := MicroVariants[variant]; { columns }
symbol.rows := MicroVariants[variant + 34]; { rows }
k := MicroVariants[variant + 68]; { number of EC CWs }
longueur := (symbol.option_2 * symbol.rows) - k; { number of non-EC CWs }
i := longueur - mc_length; { amount of padding required }
offset := MicroVariants[variant + 102]; { coefficient offset }
{ We add the padding }
while (i > 0) do
begin
chainemc[mc_length] := 900;
Inc(mc_length);
Dec(i);
end;
{ Reed-Solomon error correction }
longueur := mc_length;
for loop := 0 to 49 do
mccorrection[loop] := 0;
//total := 0;
for i := 0 to longueur - 1 do
begin
total := (chainemc[i] + mccorrection[k - 1]) mod 929;
for j := k - 1 downto 0 do
begin
if (j = 0) then
mccorrection[j] := (929 - (total * Microcoeffs[offset + j]) mod 929) mod 929
else
mccorrection[j] := (mccorrection[j - 1] + 929 - (total * Microcoeffs[offset + j]) mod 929) mod 929;
end;
end;
for j := 0 to k - 1 do
if (mccorrection[j] <> 0) then mccorrection[j] := 929 - mccorrection[j];
{ we add these codes to the string }
for i := k - 1 downto 0 do
begin
chainemc[mc_length] := mccorrection[i];
Inc(mc_length);
end;
{ Now get the RAP (Row Address Pattern) start values }
LeftRAPStart := RAPTable[variant];
CentreRAPStart := RAPTable[variant + 34];
RightRAPStart := RAPTable[variant + 68];
StartCluster := RAPTable[variant + 102] div 3;
{ That's all values loaded, get on with the encoding }
LeftRAP := LeftRAPStart;
CentreRAP := CentreRAPStart;
RightRAP := RightRAPStart;
Cluster := StartCluster; { Cluster can be 0, 1 or 2 for Cluster(0), Cluster(3) and Cluster(6) }
for i := 0 to symbol.rows - 1 do
begin
strcpy(codebarre, '');
offset := 929 * Cluster;
for j := 0 to 4 do
dummy[j] := 0;
for j := 0 to symbol.option_2 - 1 do
dummy[j + 1] := chainemc[i * symbol.option_2 + j];
{ Copy the data into codebarre }
concat(codebarre, RAPLR[LeftRAP]);
concat(codebarre, '1');
concat(codebarre, codagemc[offset + dummy[1]]);
concat(codebarre, '1');
if (cc_width = 3) then
concat(codebarre, RAPC[CentreRAP]);
if (cc_width >= 2) then
begin
concat(codebarre, '1');
concat(codebarre, codagemc[offset + dummy[2]]);
concat(codebarre, '1');
end;
if (cc_width = 4) then
concat(codebarre, RAPC[CentreRAP]);
if (cc_width >= 3) then
begin
concat(codebarre, '1');
concat(codebarre, codagemc[offset + dummy[3]]);
concat(codebarre, '1');
end;
if (cc_width = 4) then
begin
concat(codebarre, '1');
concat(codebarre, codagemc[offset + dummy[4]]);
concat(codebarre, '1');
end;
concat(codebarre, RAPLR[RightRAP]);
concat(codebarre, '1'); { stop }
{ Now codebarre is a mixture of letters and numbers }
writer := 0;
flip := 1;
strcpy(pattern, '');
for loop := 0 to strlen(codebarre) - 1 do
begin
if ((codebarre[loop] >= '0') and (codebarre[loop] <= '9')) then
begin
for k := 0 to ctoi(codebarre[loop]) - 1 do
begin
if (flip = 0) then
pattern[writer] := '0'
else
pattern[writer] := '1';
Inc(writer);
end;
pattern[writer] := #0;
if (flip = 0) then
flip := 1
else
flip := 0;
end
else
begin
lookup(BRSET, PDFttf, codebarre[loop], pattern);
Inc(writer, 5);
end;
end;
symbol.width := writer;
{ so now pattern[] holds the string of '1's and '0's. - copy this to the symbol }
for loop := 0 to strlen(pattern) - 1 do
if (pattern[loop] = '1') then set_module(symbol, i, loop);
symbol.row_height[i] := 2;
{ Set up RAPs and Cluster for next row }
Inc(LeftRAP);
Inc(CentreRAP);
Inc(RightRAP);
Inc(Cluster);
if (LeftRAP = 53) then
LeftRAP := 1;
if (CentreRAP = 53) then
CentreRAP := 1;
if (RightRAP = 53) then
RightRAP := 1;
if (Cluster = 3) then
Cluster := 0;
end;
result := 0; exit;
end;
{ CC-C 2D component - byte compressed PDF417 }
function cc_c(symbol : zint_symbol; source : TArrayOfChar; cc_width : Integer; ecc_level : Integer) : Integer;
var
_length, i, binloc : Integer;
data_string : TArrayOfByte;
chainemc : TArrayOfInteger;
mc_length, k : Integer;
offset, longueur, loop, total, j : Integer;
mccorrection : array[0..519] of Integer;
c1, c2, c3 : Integer;
dummy : array[0..34] of Integer;
codebarre, pattern : TArrayOfChar;
begin
SetLength(data_string, (strlen(source) div 8) + 4);
SetLength(chainemc, 1000);
SetLength(codebarre, 100);
SetLength(pattern, 580);
_length := strlen(source) div 8;
for i := 0 to _length - 1 do
begin
binloc := i * 8;
data_string[i] := 0;
if (source[binloc] = '1') then Inc(data_string[i], $80);
if (source[binloc + 1] = '1') then Inc(data_string[i], $40);
if (source[binloc + 2] = '1') then Inc(data_string[i], $20);
if (source[binloc + 3] = '1') then Inc(data_string[i], $10);
if (source[binloc + 4] = '1') then Inc(data_string[i], $08);
if (source[binloc + 5] = '1') then Inc(data_string[i], $04);
if (source[binloc + 6] = '1') then Inc(data_string[i], $02);
if (source[binloc + 7] = '1') then Inc(data_string[i], $01);
end;
mc_length := 0;
chainemc[mc_length] := 0; { space for _length descriptor }
Inc(mc_length);
chainemc[mc_length] := 920; { CC-C identifier }
Inc(mc_length);
byteprocess(chainemc, mc_length, data_string, 0, _length, 0);
chainemc[0] := mc_length;
k := 1;
for i := 1 to (ecc_level + 1) do
k := k * 2;
{ 796 - we now take care of the Reed Solomon codes }
case ecc_level of
1: offset := 2;
2: offset := 6;
3: offset := 14;
4: offset := 30;
5: offset := 62;
6: offset := 126;
7: offset := 254;
8: offset := 510;
else offset := 0;
end;
longueur := mc_length;
for loop := 0 to 519 do
mccorrection[loop] := 0;
//total := 0;
for i := 0 to longueur - 1 do
begin
total := (chainemc[i] + mccorrection[k - 1]) mod 929;
for j := k - 1 downto 0 do
begin
if (j = 0) then
mccorrection[j] := (929 - (total * coefrs[offset + j]) mod 929) mod 929
else
mccorrection[j] := (mccorrection[j - 1] + 929 - (total * coefrs[offset + j]) mod 929) mod 929;
end;
end;
for j := 0 to k - 1 do
if (mccorrection[j] <> 0) then mccorrection[j] := 929 - mccorrection[j];
{ we add these codes to the string }
for i := k - 1 downto 0 do
begin
chainemc[mc_length] := mccorrection[i];
Inc(mc_length);
end;
{ 818 - The CW string is finished }
c1 := (mc_length div cc_width - 1) div 3;
c2 := ecc_level * 3 + (mc_length div cc_width - 1) mod 3;
c3 := cc_width - 1;
{ we now encode each row }
for i := 0 to (mc_length div cc_width) - 1 do
begin
for j := 0 to cc_width - 1 do
dummy[j + 1] := chainemc[i * cc_width + j];
k := (i div 3) * 30;
case i mod 3 of
{ follows this pattern from US Patent 5,243,655:
Row 0: L0 (row #, # of rows) R0 (row #, # of columns)
Row 1: L1 (row #, security level) R1 (row #, # of rows)
Row 2: L2 (row #, # of columns) R2 (row #, security level)
Row 3: L3 (row #, # of rows) R3 (row #, # of columns)
etc. }
0:
begin
dummy[0] := k + c1;
dummy[cc_width + 1] := k + c3;
end;
1:
begin
dummy[0] := k + c2;
dummy[cc_width + 1] := k + c1;
end;
2:
begin
dummy[0] := k + c3;
dummy[cc_width + 1] := k + c2;
end;
end;
strcpy(codebarre, '+*'); { Start with a start char and a separator }
for j := 0 to cc_width + 1 do
begin
case i mod 3 of
1: offset := 929; { cluster(3) }
2: offset := 1858; { cluster(6) }
else
offset := 0; { cluster(0) }
end;
concat(codebarre, codagemc[offset + dummy[j]]);
concat(codebarre, '*');
end;
concat(codebarre, '-');
strcpy(pattern, '');
for loop := 0 to strlen(codebarre) - 1 do
lookup(BRSET, PDFttf, codebarre[loop], pattern);
for loop := 0 to strlen(pattern) - 1 do
if (pattern[loop] = '1') then set_module(symbol, i, loop);
symbol.row_height[i] := 3;
end;
symbol.rows := (mc_length div cc_width);
symbol.width := strlen(pattern);
result := 0; exit;
end;
{ Handles all data encodation from section 5 of ISO/IEC 24723 }
function cc_binary_string(symbol : zint_symbol; const source : TArrayOfChar; var binary_string : TArrayOfChar; cc_mode : Integer; var cc_width : Integer; var ecc : Integer; lin_width : Integer) : Integer;
var
encoding_method, read_posn, d1, d2, value, alpha_pad : Integer;
i, j, mask, ai_crop, fnc1_latch : Integer;
group_val : Integer;
ai90_mode, latch, remainder, binary_length : Integer;
date_str : String;
general_field, general_field_type : TArrayOfChar;
target_bitsize : Integer;
ninety : TArrayOfChar;
numeric_part : String;
alpha, alphanum, numeric, test1, test2, test3, next_ai_posn : Integer;
numeric_value, table3_letter : Integer;
byte_length, codewords_used, ecc_level, ecc_codewords, rows : Integer;
codewords_total, target_codewords, target_bytesize : Integer;
begin
SetLength(general_field, strlen(source) + 1);
SetLength(general_field_type, strlen(source) + 1);
SetLength(ninety, strlen(source) + 1);
encoding_method := 1;
read_posn := 0;
ai_crop := 0;
fnc1_latch := 0;
alpha_pad := 0;
ai90_mode := 0;
ecc := 0;
value := 0;
target_bitsize := 0;
if ((source[0] = '1') and ((source[1] = '0') or (source[1] = '1') or (source[1] = '7')) and (strlen(source) > 8)) then
{ Source starts (10), (11) or (17) }
encoding_method := 2;
if ((source[0] = '9') and (source[1] = '0')) then
{ Source starts (90) }
encoding_method := 3;
if (encoding_method = 1) then
concat(binary_string, '0');
if (encoding_method = 2) then
begin
{ Encoding Method field '10' - date and lot number }
concat(binary_string, '10');
if (source[1] = '0') then
begin
{ No date data }
concat(binary_string, '11');
read_posn := 2;
end
else
begin
{ Production Date (11) or Expiration Date (17) }
date_str := source[2] + source[3];
group_val := StrToInt(date_str) * 384;
date_str := source[4] + source[5];
Inc(group_val, (StrToInt(date_str) - 1) * 32);
date_str := source[6] + source[7];
Inc(group_val, StrToInt(date_str));
mask := $8000;
for j := 0 to 15 do
begin
if ((group_val and mask) = $00) then
concat(binary_string, '0')
else
concat(binary_string, '1');
mask := mask shr 1;
end;
if (source[1] = '1') then
{ Production Date AI 11 }
concat(binary_string, '0')
else
{ Expiration Date AI 17 }
concat(binary_string, '1');
read_posn := 8;
end;
if ((source[read_posn] = '1') and (source[read_posn + 1] = '0')) then
{ Followed by AI 10 - strip this from general field }
Inc(read_posn, 2)
else
{ An FNC1 character needs to be inserted in the general field }
fnc1_latch := 1;
end;
if (encoding_method = 3) then
begin
{ Encodation Method field of '11' - AI 90 }
{ 'This encodation method may be used if an element string with an AI
90 occurs at the start of the data message, and if the data field
following the two-digit AI 90 starts with an alphanumeric string which
complies with a specific format.' (para 5.2.2) }
i := 0;
repeat
ninety[i] := source[i + 2];
Inc(i);
until not ((strlen(source) > i + 2 ) and ('[' <> source[i + 2]));
ninety[i] := #0;
{ Find out if the AI 90 data is alphabetic or numeric or both }
alpha := 0;
alphanum := 0;
numeric := 0;
for i := 0 to strlen(ninety) - 1 do
begin
if ((ninety[i] >= 'A') and (ninety[i] <= 'Z')) then
{ Character is alphabetic }
Inc(alpha);
if ((ninety[i] >= '0') and (ninety[i] <= '9')) then
{ Character is numeric }
Inc(numeric);
case ninety[i] of
'*',
',',
'-',
'.',
'/': Inc(alphanum);
end;
if (not (((ninety[i] >= '0') and (ninety[i] <= '9')) or ((ninety[i] >= 'A') and (ninety[i] <= 'Z')))) then
begin
if ((ninety[i] <> '*') and (ninety[i] <> ',') and (ninety[i] <> '-') and (ninety[i] <> '.') and (ninety[i] <> '/')) then
begin
{ An Invalid AI 90 character }
strcpy(symbol.errtxt, 'Invalid AI 90 data');
result := ZERROR_INVALID_DATA; exit;
end;
end;
end;
{ must start with 0, 1, 2 or 3 digits followed by an uppercharacter }
test1 := -1;
for i := 3 downto 0 do
begin
if ((ninety[i] >= 'A') and (ninety[i] <= 'Z')) then
test1 := i;
end;
test2 := 0;
for i := 0 to test1 - 1 do
begin
if (not ((ninety[i] >= '0') and (ninety[i] <= '9'))) then
test2 := 1;
end;
{ leading zeros are not permitted }
test3 := 0;
if ((test1 >= 1) and (ninety[0] = '0')) then test3 := 1;
if ((test1 <> -1) and (test2 <> 1) and (test3 = 0)) then
begin
{ Encodation method '11' can be used }
concat(binary_string, '11');
Dec(numeric, test1);
Dec(alpha);
{ Decide on numeric, alpha or alphanumeric mode }
{ Alpha mode is a special mode for AI 90 }
if (alphanum > 0) then
begin
{ Alphanumeric mode }
concat(binary_string, '0');
ai90_mode := 1;
end
else
begin
if (alpha > numeric) then
begin
{ Alphabetic mode }
concat(binary_string, '11');
ai90_mode := 2;
end
else
begin
{ Numeric mode }
concat(binary_string, '10');
ai90_mode := 3;
end;
end;
next_ai_posn := 2 + strlen(ninety);
if (source[next_ai_posn + 1] = '[') then
begin
{ There are more AIs afterwords }
if ((source[next_ai_posn + 1] = '2') and (source[next_ai_posn + 2] = '1')) then
{ AI 21 follows }
ai_crop := 1;
if ((source[next_ai_posn + 1] = '8') and (source[next_ai_posn + 2] = '0') and (source[next_ai_posn + 3] = '0') and (source[next_ai_posn + 4] = '4')) then
{ AI 8004 follows }
ai_crop := 2;
end;
case ai_crop of
0: concat(binary_string, '0');
1: concat(binary_string, '10');
2: concat(binary_string, '11');
end;
if (test1 = 0) then