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zint/backend/ultra.c
gitlost fab7435fac Performance improvements for linear encoding and raster output 
- use fixed-length string tables (mostly) instead of (char *) pointer ones
   (saves ~40K)
 - re-use C128Table for CODABLOCKF and CODE16K
   (required removal of Stop character and extra CODE16K-only entry)
 - use pointer to destination and copy (memcpy/strcpy(), bin_append_posn())
   instead of concatenating (strcat()) (mostly)
 - replace last remaining bin_append()s with bin_append_posn();
   bin_append() removed
 - add length arg to toupper() and expand() (avoids strlen())
 - change is_sane() to use table-based flags (avoids an iteration)
 - rename lookup() to is_sane_lookup() and change to check and return posns
   and use in pointer to destination loops (avoids strcat()s)
 - remove special case PHARMA in expand() (dealt with in pharma())
 - make #define SILVER/CALCIUM/TECHNETIUM/KRSET etc static strings
 - replace strchr() -> posn()
 - CODE128: populate destination once in checksum loop; re-use and export
   some more routines (c128_set_a/b/c(), c128_put_in_set()) for sharing;
   prefix defines (SHIFTA -> C128_SHIFTA etc) and existing exported routines
 - use factor XOR toggle trick in checksum calcs (avoids branch)
 - raster.c: fill out single 1-pixel row and copy using new draw_bar_line(),
   copy_bar_line() routines; similarly in buffer_plot compare previous line &
   copy if same (same technique as used to improve non-half-integer scaling,
   significant performance increase, (c) codemonkey82);
   also done for PNG (BMP/GIF/PCX/TIFF not done)
 - raster/vector/output.c: shorten "output_" prefix -> "out_";
   sync vector to other raster changes to try to keep source files similar
 - 2of5.c: prefix "c25_"
JAPANPOST: return error if input data truncated (backward incompatible)
DAFT: max chars 50 -> 100
common.c: istwodigit() -> is_twodigit()
common.c/emf.c/output.c: use some further stripf()s (MSVC6 float variations)
library.c: new check_output_args() helper
zint.h: add BARCODE_LAST marker and use in library.c
QRCODE: remove a NOLINT (requires clang-tidy-13), one remaining
CMake: separate no-optimize from ZINT_DEBUG into new ZINT_NOOPT option
2021-10-20 23:05:30 +01:00

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/* ultra.c - Ultracode
libzint - the open source barcode library
Copyright (C) 2020 - 2021 Robin Stuart <rstuart114@gmail.com>
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. Neither the name of the project nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
*/
/* vim: set ts=4 sw=4 et : */
/* This version was developed using AIMD/TSC15032-43 v0.99c Edit 60, dated 4th Nov 2015 */
#ifdef _MSC_VER
#include <malloc.h>
#endif
#include <stdio.h>
#include "common.h"
#define EIGHTBIT_MODE 10
#define ASCII_MODE 20
#define C43_MODE 30
#define PREDICT_WINDOW 12
#define GFMUL(i, j) ((((i) == 0)||((j) == 0)) ? 0 : gfPwr[(gfLog[i] + gfLog[j])])
static const char fragment[27][13] = {"http://", "https://", "http://www.", "https://www.",
"ftp://", "www.", ".com", ".edu", ".gov", ".int", ".mil", ".net", ".org",
".mobi", ".coop", ".biz", ".info", "mailto:", "tel:", ".cgi", ".asp",
".aspx", ".php", ".htm", ".html", ".shtml", "file:"};
static const char ultra_c43_set1[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 .,%";
static const char ultra_c43_set2[] = "abcdefghijklmnopqrstuvwxyz:/?#[]@=_~!.,-";
static const char ultra_c43_set3[] = "{}`()\"+'<>|$;&\\^*";
static const char ultra_digit[] = "0123456789,/";
static const char ultra_colour[] = "0CBMRYGKW";
// Max size and min cols adjusted to BWIPP values as updated 2021-07-14
// https://github.com/bwipp/postscriptbarcode/commit/4255810845fa8d45c6192dd30aee1fdad1aaf0cc
static const int ultra_maxsize[] = {37, 84, 161, 282};
static const int ultra_mincols[] = {5, 13, 22, 29};
static const int kec[] = {0, 1, 2, 4, 6, 8}; // Value K(EC) from Table 12
/* Taken from BWIPP - change in DCCU/DCCL tiles for revision 2 2021-09-28 */
static const unsigned short dccu[2][32] = {
{ // Revision 1
051363, 051563, 051653, 053153, 053163, 053513, 053563, 053613, // 0-7
053653, 056153, 056163, 056313, 056353, 056363, 056513, 056563, // 8-15
051316, 051356, 051536, 051616, 053156, 053516, 053536, 053616, // 16-23
053636, 053656, 056136, 056156, 056316, 056356, 056516, 056536 // 24-31
},
{ // Revision 2 (inversion of DCCL Revision 1)
015316, 016316, 013516, 016516, 013616, 015616, 013136, 015136, // 0-7
016136, 013536, 016536, 013636, 013156, 016156, 015356, 013656, // 8-15
015313, 016313, 013513, 016513, 013613, 015613, 013153, 015153, // 16-23
016153, 016353, 013653, 015653, 013163, 015163, 015363, 013563 // 24-31
},
};
static const unsigned short dccl[2][32] = {
{ // Revision 1
061351, 061361, 061531, 061561, 061631, 061651, 063131, 063151, // 0-7
063161, 063531, 063561, 063631, 065131, 065161, 065351, 065631, // 8-15
031351, 031361, 031531, 031561, 031631, 031651, 035131, 035151, // 16-23
035161, 035361, 035631, 035651, 036131, 036151, 036351, 036531 // 24-31
},
{ // Revision 2 (inversion of DCCU Revision 1)
036315, 036515, 035615, 035135, 036135, 031535, 036535, 031635, // 0-7
035635, 035165, 036165, 031365, 035365, 036365, 031565, 036565, // 8-15
061315, 065315, 063515, 061615, 065135, 061535, 063535, 061635, // 16-23
063635, 065635, 063165, 065165, 061365, 065365, 061565, 063565 // 24-31
},
};
static const int tiles[] = {
013135, 013136, 013153, 013156, 013163, 013165, 013513, 013515, 013516, 013531, // 0-9
013535, 013536, 013561, 013563, 013565, 013613, 013615, 013616, 013631, 013635, // 10-19
013636, 013651, 013653, 013656, 015135, 015136, 015153, 015163, 015165, 015313, // 20-29
015315, 015316, 015351, 015353, 015356, 015361, 015363, 015365, 015613, 015615, // 30-39
015616, 015631, 015635, 015636, 015651, 015653, 015656, 016135, 016136, 016153, // 40-49
016156, 016165, 016313, 016315, 016316, 016351, 016353, 016356, 016361, 016363, // 50-59
016365, 016513, 016515, 016516, 016531, 016535, 016536, 016561, 016563, 016565, // 60-69
031315, 031316, 031351, 031356, 031361, 031365, 031513, 031515, 031516, 031531, // 70-79
031535, 031536, 031561, 031563, 031565, 031613, 031615, 031631, 031635, 031636, // 80-89
031651, 031653, 031656, 035131, 035135, 035136, 035151, 035153, 035156, 035161, // 90-99
035163, 035165, 035315, 035316, 035351, 035356, 035361, 035365, 035613, 035615, // 100-109
035616, 035631, 035635, 035636, 035651, 035653, 035656, 036131, 036135, 036136, // 110-119
036151, 036153, 036156, 036163, 036165, 036315, 036316, 036351, 036356, 036361, // 120-129
036365, 036513, 036515, 036516, 036531, 036535, 036536, 036561, 036563, 036565, // 130-139
051313, 051315, 051316, 051351, 051353, 051356, 051361, 051363, 051365, 051513, // 140-149
051516, 051531, 051536, 051561, 051563, 051613, 051615, 051616, 051631, 051635, // 150-159
051636, 051651, 051653, 051656, 053131, 053135, 053136, 053151, 053153, 053156, // 160-169
053161, 053163, 053165, 053513, 053516, 053531, 053536, 053561, 053563, 053613, // 170-179
053615, 053616, 053631, 053635, 053636, 053651, 053653, 053656, 056131, 056135, // 180-189
056136, 056151, 056153, 056156, 056161, 056163, 056165, 056313, 056315, 056316, // 190-199
056351, 056353, 056356, 056361, 056363, 056365, 056513, 056516, 056531, 056536, // 200-209
056561, 056563, 061313, 061315, 061316, 061351, 061353, 061356, 061361, 061363, // 210-219
061365, 061513, 061515, 061516, 061531, 061535, 061536, 061561, 061563, 061565, // 220-229
061615, 061631, 061635, 061651, 061653, 063131, 063135, 063136, 063151, 063153, // 230-239
063156, 063161, 063163, 063165, 063513, 063515, 063516, 063531, 063535, 063536, // 240-249
063561, 063563, 063565, 063613, 063615, 063631, 063635, 063651, 063653, 065131, // 250-259
065135, 065136, 065151, 065153, 065156, 065161, 065163, 065165, 065313, 065315, // 260-269
065316, 065351, 065353, 065356, 065361, 065363, 065365, 065613, 065615, 065631, // 270-279
065635, 065651, 065653, 056565, 051515 // 280-284
};
/* The following adapted from ECC283.C "RSEC codeword generator"
* from Annex B of Ultracode draft
* originally written by Ted Williams of Symbol Vision Corp.
* Dated 2001-03-09
* Corrected thanks to input from Terry Burton */
/*
* NOTE: Included here is an attempt to allow code compression within Ultracode. Unfortunately
* the copy of the standard this was written from was an early draft which includes self
* contradictions, so this is a "best guess" implementation. Because it is not guaranteed
* to be correct this compression is not applied by default. To enable compression set
*
* symbol->option_3 = ULTRA_COMPRESSION;
*
* Code compression should be enabled by default when it has been implemented according to
* a more reliable version of the specification.
*/
/* Generate divisor polynomial gQ(x) for GF283() given the required ECC size, 3 to 101 */
static void ultra_genPoly(short EccSize, unsigned short gPoly[], unsigned short gfPwr[], unsigned short gfLog[]) {
int i, j;
gPoly[0] = 1;
for (i = 1; i < (EccSize + 1); i++) gPoly[i] = 0;
for (i = 0; i < EccSize; i++) {
for (j = i; j >= 0; j--)
gPoly[j + 1] = (gPoly[j] + GFMUL(gPoly[j + 1], gfPwr[i + 1])) % 283;
gPoly[0] = GFMUL(gPoly[0], gfPwr[i + 1]);
}
for (i = EccSize - 1; i >= 0; i -= 2) gPoly[i] = 283 - gPoly[i];
/* gPoly[i] is > 0 so modulo operation not needed */
}
/* Generate the log and antilog tables for GF283() multiplication & division */
static void ultra_initLogTables(unsigned short gfPwr[], unsigned short gfLog[]) {
int i, j;
for (j = 0; j < 283; j++) gfLog[j] = 0;
i = 1;
for (j = 0; j < 282; j++) {
/* j + 282 indices save doing the modulo operation in GFMUL */
gfPwr[j + 282] = gfPwr[j] = (short) i;
gfLog[i] = (short) j;
i = (i * 3) % 283;
}
}
static void ultra_gf283(short DataSize, short EccSize, int Message[]) {
/* Input is complete message codewords in array Message[282]
* DataSize is number of message codewords
* EccSize is number of Reed-Solomon GF(283) check codewords to generate
*
* Upon exit, Message[282] contains complete 282 codeword Symbol Message
* including leading zeroes corresponding to each truncated codeword */
unsigned short gPoly[283], gfPwr[(282 * 2)], gfLog[283];
int i, j, n;
unsigned short t;
/* first build the log & antilog tables used in multiplication & division */
ultra_initLogTables(gfPwr, gfLog);
/* then generate the division polynomial of length EccSize */
ultra_genPoly(EccSize, gPoly, gfPwr, gfLog);
/* zero all EccSize codeword values */
for (j = 281; (j > (281 - EccSize)); j--) Message[j] = 0;
/* shift message codewords to the right, leave space for ECC checkwords */
for (i = DataSize - 1; (i >= 0); j--, i--) Message[j] = Message[i];
/* add zeroes to pad left end Message[] for truncated codewords */
j++;
for (i = 0; i < j; i++) Message[i] = 0;
/* generate (EccSize) Reed-Solomon checkwords */
for (n = j; n < (j + DataSize); n++) {
t = (Message[j + DataSize] + Message[n]) % 283;
for (i = 0; i < (EccSize - 1); i++) {
Message[j + DataSize + i] = (Message[j + DataSize + i + 1] + 283
- GFMUL(t, gPoly[EccSize - 1 - i])) % 283;
}
Message[j + DataSize + EccSize - 1] = (283 - GFMUL(t, gPoly[0])) % 283;
}
for (i = j + DataSize; i < (j + DataSize + EccSize); i++)
Message[i] = (283 - Message[i]) % 283;
}
/* End of Ted Williams code */
static int ultra_find_fragment(const unsigned char source[], int source_length, int position) {
int retval = -1;
int j, k, latch, fraglen;
for (j = 0; j < 27; j++) {
latch = 0;
fraglen = (int) strlen(fragment[j]);
if ((position + fraglen) <= source_length) {
latch = 1;
for (k = 0; k < fraglen; k++) {
if (source[position + k] != fragment[j][k]) {
latch = 0;
break;
}
}
}
if (latch) {
retval = j;
}
}
return retval;
}
/* Encode characters in 8-bit mode */
static float look_ahead_eightbit(unsigned char source[], int in_length, int in_locn, char current_mode, int end_char,
int cw[], int *cw_len, int gs1) {
int codeword_count = 0;
int i;
int letters_encoded = 0;
if (current_mode != EIGHTBIT_MODE) {
cw[codeword_count] = 282; // Unlatch
codeword_count += 1;
}
i = in_locn;
while ((i < in_length) && (i < end_char)) {
if ((source[i] == '[') && gs1) {
cw[codeword_count] = 268; // FNC1
} else {
cw[codeword_count] = source[i];
}
i++;
codeword_count++;
}
letters_encoded = i - in_locn;
*cw_len = codeword_count;
if (codeword_count == 0) {
return 0.0f;
}
return (float) letters_encoded / (float) codeword_count;
}
/* Encode character in the ASCII mode/submode (including numeric compression) */
static float look_ahead_ascii(unsigned char source[], int in_length, int in_locn, char current_mode, int symbol_mode,
int end_char, int cw[], int *cw_len, int *encoded, int gs1) {
int codeword_count = 0;
int i;
int first_digit, second_digit, done;
int letters_encoded = 0;
if (current_mode == EIGHTBIT_MODE) {
cw[codeword_count] = 267; // Latch ASCII Submode
codeword_count++;
}
if (current_mode == C43_MODE) {
cw[codeword_count] = 282; // Unlatch
codeword_count++;
if (symbol_mode == EIGHTBIT_MODE) {
cw[codeword_count] = 267; // Latch ASCII Submode
codeword_count++;
}
}
i = in_locn;
do {
/* Check for double digits */
done = 0;
if (i + 1 < in_length) {
first_digit = posn(ultra_digit, source[i]);
second_digit = posn(ultra_digit, source[i + 1]);
if ((first_digit != -1) && (second_digit != -1)) {
/* Double digit can be encoded */
if ((first_digit >= 0) && (first_digit <= 9) && (second_digit >= 0) && (second_digit <= 9)) {
/* Double digit numerics */
cw[codeword_count] = (10 * first_digit) + second_digit + 128;
codeword_count++;
i += 2;
done = 1;
} else if ((first_digit >= 0) && (first_digit <= 9) && (second_digit == 10)) {
/* Single digit followed by selected decimal point character */
cw[codeword_count] = first_digit + 228;
codeword_count++;
i += 2;
done = 1;
} else if ((first_digit == 10) && (second_digit >= 0) && (second_digit <= 9)) {
/* Selected decimal point character followed by single digit */
cw[codeword_count] = second_digit + 238;
codeword_count++;
i += 2;
done = 1;
} else if ((first_digit >= 0) && (first_digit <= 9) && (second_digit == 11)) {
/* Single digit or decimal point followed by field deliminator */
cw[codeword_count] = first_digit + 248;
codeword_count++;
i += 2;
done = 1;
} else if ((first_digit == 11) && (second_digit >= 0) && (second_digit <= 9)) {
/* Field deliminator followed by single digit or decimal point */
cw[codeword_count] = second_digit + 259;
codeword_count++;
i += 2;
done = 1;
}
}
}
if (!done && source[i] < 0x80) {
if ((source[i] == '[') && gs1) {
cw[codeword_count] = 272; // FNC1
} else {
cw[codeword_count] = source[i];
}
codeword_count++;
i++;
}
} while ((i < in_length) && (i < end_char) && (source[i] < 0x80));
letters_encoded = i - in_locn;
if (encoded != NULL) {
*encoded = letters_encoded;
}
*cw_len = codeword_count;
if (codeword_count == 0) {
return 0.0f;
}
return (float) letters_encoded / (float) codeword_count;
}
/* Returns true if should latch to subset other than given `subset` */
static int c43_should_latch_other(const unsigned char data[], const int length, const int locn, const int subset,
const int gs1) {
int i, fraglen, predict_window;
int cnt, alt_cnt, fragno;
const char *const set = subset == 1 ? ultra_c43_set1 : ultra_c43_set2;
const char *const alt_set = subset == 2 ? ultra_c43_set1 : ultra_c43_set2;
if (locn + 3 > length) {
return 0;
}
predict_window = locn + 3;
for (i = locn, cnt = 0, alt_cnt = 0; i < predict_window; i++) {
if (data[i] <= 0x1F || data[i] >= 0x7F || (gs1 && data[i] == '[')) {
break;
}
fragno = ultra_find_fragment(data, length, i);
if (fragno != -1 && fragno != 26) {
fraglen = (int) strlen(fragment[fragno]);
predict_window += fraglen;
if (predict_window > length) {
predict_window = length;
}
i += fraglen - 1;
} else {
if (posn(set, data[i]) != -1) {
cnt++;
}
if (posn(alt_set, data[i]) != -1) {
alt_cnt++;
}
}
}
return alt_cnt > cnt;
}
static int get_subset(unsigned char source[], int in_length, int in_locn, int current_subset) {
int fragno;
int subset = 0;
fragno = ultra_find_fragment(source, in_length, in_locn);
if ((fragno != -1) && (fragno != 26)) {
subset = 3;
} else if (current_subset == 2) {
if (posn(ultra_c43_set2, source[in_locn]) != -1) {
subset = 2;
} else if (posn(ultra_c43_set1, source[in_locn]) != -1) {
subset = 1;
}
} else {
if (posn(ultra_c43_set1, source[in_locn]) != -1) {
subset = 1;
} else if (posn(ultra_c43_set2, source[in_locn]) != -1) {
subset = 2;
}
}
if (subset == 0) {
if (posn(ultra_c43_set3, source[in_locn]) != -1) {
subset = 3;
}
}
return subset;
}
/* Encode characters in the C43 compaction submode */
static float look_ahead_c43(unsigned char source[], int in_length, int in_locn, char current_mode, int end_char,
int subset, int cw[], int *cw_len, int *encoded, int gs1, int debug) {
int codeword_count = 0;
int subcodeword_count = 0;
int i;
int fragno;
int sublocn = in_locn;
int new_subset;
int unshift_set;
int base43_value;
int letters_encoded = 0;
int pad;
#ifndef _MSC_VER
int subcw[(in_length + 3) * 2];
#else
int *subcw = (int *) _alloca((in_length + 3) * 2 * sizeof(int));
#endif /* _MSC_VER */
if (current_mode == EIGHTBIT_MODE) {
/* Check for permissable URL C43 macro sequences, otherwise encode directly */
fragno = ultra_find_fragment(source, in_length, sublocn);
if ((fragno == 2) || (fragno == 3)) {
// http://www. > http://
// https://www. > https://
fragno -= 2;
}
switch (fragno) {
case 17: // mailto:
cw[codeword_count] = 276;
sublocn += (int) strlen(fragment[fragno]);
codeword_count++;
break;
case 18: // tel:
cw[codeword_count] = 277;
sublocn += (int) strlen(fragment[fragno]);
codeword_count++;
break;
case 26: // file:
cw[codeword_count] = 278;
sublocn += (int) strlen(fragment[fragno]);
codeword_count++;
break;
case 0: // http://
cw[codeword_count] = 279;
sublocn += (int) strlen(fragment[fragno]);
codeword_count++;
break;
case 1: // https://
cw[codeword_count] = 280;
sublocn += (int) strlen(fragment[fragno]);
codeword_count++;
break;
case 4: // ftp://
cw[codeword_count] = 281;
sublocn += (int) strlen(fragment[fragno]);
codeword_count++;
break;
default:
if (subset == 1) {
cw[codeword_count] = 260; // C43 Compaction Submode C1
codeword_count++;
} else if ((subset == 2) || (subset == 3)) {
cw[codeword_count] = 266; // C43 Compaction Submode C2
codeword_count++;
}
break;
}
} else if (current_mode == ASCII_MODE) {
if (subset == 1) {
cw[codeword_count] = 278; // C43 Compaction Submode C1
codeword_count++;
} else if ((subset == 2) || (subset == 3)) {
cw[codeword_count] = 280; // C43 Compaction Submode C2
codeword_count++;
}
}
unshift_set = subset;
while ((sublocn < in_length) && (sublocn < end_char)) {
/* Check for FNC1 */
if (gs1 && source[sublocn] == '[') {
break;
}
new_subset = get_subset(source, in_length, sublocn, subset);
if (new_subset == 0) {
break;
}
if ((new_subset != subset) && ((new_subset == 1) || (new_subset == 2))) {
if (c43_should_latch_other(source, in_length, sublocn, subset, gs1)) {
subcw[subcodeword_count] = 42; // Latch to other C43 set
subcodeword_count++;
unshift_set = new_subset;
} else {
subcw[subcodeword_count] = 40; // Shift to other C43 set for 1 char
subcodeword_count++;
subcw[subcodeword_count] = posn(new_subset == 1 ? ultra_c43_set1 : ultra_c43_set2, source[sublocn]);
subcodeword_count++;
sublocn++;
continue;
}
}
subset = new_subset;
if (subset == 1) {
subcw[subcodeword_count] = posn(ultra_c43_set1, source[sublocn]);
subcodeword_count++;
sublocn++;
} else if (subset == 2) {
subcw[subcodeword_count] = posn(ultra_c43_set2, source[sublocn]);
subcodeword_count++;
sublocn++;
} else if (subset == 3) {
subcw[subcodeword_count] = 41; // Shift to set 3
subcodeword_count++;
fragno = ultra_find_fragment(source, in_length, sublocn);
if (fragno != -1 && fragno != 26) {
if (fragno <= 18) {
subcw[subcodeword_count] = fragno; // C43 Set 3 codewords 0 to 18
subcodeword_count++;
sublocn += (int) strlen(fragment[fragno]);
} else {
subcw[subcodeword_count] = fragno + 17; // C43 Set 3 codewords 36 to 42
subcodeword_count++;
sublocn += (int) strlen(fragment[fragno]);
}
} else {
subcw[subcodeword_count] = posn(ultra_c43_set3, source[sublocn]) + 19; // C43 Set 3 codewords 19 to 35
subcodeword_count++;
sublocn++;
}
subset = unshift_set;
}
}
pad = 3 - (subcodeword_count % 3);
if (pad == 3) {
pad = 0;
}
for (i = 0; i < pad; i++) {
subcw[subcodeword_count] = 42; // Latch to other C43 set used as pad
subcodeword_count++;
}
if (debug & ZINT_DEBUG_PRINT) {
printf("C43 codewords %.*s: (%d)", in_length, source + in_locn, subcodeword_count);
for (i = 0; i < subcodeword_count; i++) printf( " %d", subcw[i]);
printf("\n");
}
letters_encoded = sublocn - in_locn;
if (encoded != NULL) {
*encoded = letters_encoded;
}
for (i = 0; i < subcodeword_count; i += 3) {
base43_value = (43 * 43 * subcw[i]) + (43 * subcw[i + 1]) + subcw[i + 2];
cw[codeword_count] = base43_value / 282;
codeword_count++;
cw[codeword_count] = base43_value % 282;
codeword_count++;
}
*cw_len = codeword_count;
if (codeword_count == 0) {
return 0.0f;
}
return (float) letters_encoded / (float) codeword_count;
}
/* Produces a set of codewords which are "somewhat" optimised - this could be improved on */
static int ultra_generate_codewords(struct zint_symbol *symbol, const unsigned char source[], const int in_length,
int codewords[]) {
int i;
int crop_length;
int codeword_count = 0;
int input_locn = 0;
char symbol_mode;
char current_mode;
int subset;
float eightbit_score;
float ascii_score;
float c43_score;
int end_char;
int block_length;
int fragment_length;
int fragno;
int gs1 = 0;
int ascii_encoded, c43_encoded;
#ifndef _MSC_VER
unsigned char crop_source[in_length + 1];
char mode[in_length + 1];
int cw_fragment[in_length * 2 + 1];
#else
unsigned char *crop_source = (unsigned char *) _alloca(in_length + 1);
char *mode = (char *) _alloca(in_length + 1);
int *cw_fragment = (int *) _alloca((in_length * 2 + 1) * sizeof(int));
#endif /* _MSC_VER */
if ((symbol->input_mode & 0x07) == GS1_MODE) {
gs1 = 1;
}
// Decide start character codeword (from Table 5)
symbol_mode = ASCII_MODE;
for (i = 0; i < in_length; i++) {
if (source[i] >= 0x80) {
symbol_mode = EIGHTBIT_MODE;
break;
}
}
if (symbol->option_3 != ULTRA_COMPRESSION && !gs1) {
// Force eight-bit mode by default as other modes are poorly documented
symbol_mode = EIGHTBIT_MODE;
}
if (symbol->output_options & READER_INIT) {
/* Reader Initialisation mode */
codeword_count = 2;
if (symbol_mode == ASCII_MODE) {
codewords[0] = 272; // 7-bit ASCII mode
codewords[1] = 271; // FNC3
} else {
codewords[0] = 257; // 8859-1
codewords[1] = 269; // FNC3
}
} else {
/* Calculate start character codeword */
codeword_count = 1;
if (symbol_mode == ASCII_MODE) {
if (gs1) {
codewords[0] = 273;
} else {
codewords[0] = 272;
}
} else {
if ((symbol->eci >= 3) && (symbol->eci <= 18) && (symbol->eci != 14)) {
// ECI indicates use of character set within ISO/IEC 8859
codewords[0] = 257 + (symbol->eci - 3);
if (codewords[0] > 267) {
// Avoids ECI 14 for non-existant ISO/IEC 8859-12
codewords[0]--;
}
} else if ((symbol->eci > 18) && (symbol->eci <= 898)) {
// ECI indicates use of character set outside ISO/IEC 8859
codewords[0] = 275 + (symbol->eci / 256);
codewords[1] = symbol->eci % 256;
codeword_count = 2;
} else if (symbol->eci == 899) {
// Non-language byte data
codewords[0] = 280;
} else if ((symbol->eci > 899) && (symbol->eci <= 9999)) {
// ECI beyond 899 needs to use fixed length encodable ECI invocation (section 7.6.2)
// Encode as 3 codewords
codewords[0] = 257; // ISO/IEC 8859-1 used to enter 8-bit mode
codewords[1] = 274; // Encode ECI as 3 codewords
codewords[2] = (symbol->eci / 100) + 128;
codewords[3] = (symbol->eci % 100) + 128;
codeword_count = 4;
} else if (symbol->eci >= 10000) {
// Encode as 4 codewords
codewords[0] = 257; // ISO/IEC 8859-1 used to enter 8-bit mode
codewords[1] = 275; // Encode ECI as 4 codewords
codewords[2] = (symbol->eci / 10000) + 128;
codewords[3] = ((symbol->eci % 10000) / 100) + 128;
codewords[4] = (symbol->eci % 100) + 128;
codeword_count = 5;
} else {
codewords[0] = 257; // Default is assumed to be ISO/IEC 8859-1 (ECI 3)
}
}
if ((codewords[0] == 257) || (codewords[0] == 272)) {
fragno = ultra_find_fragment(source, in_length, 0);
// Check for http:// at start of input
if ((fragno == 0) || (fragno == 2)) {
codewords[0] = 281;
input_locn = 7;
symbol_mode = EIGHTBIT_MODE;
// Check for https:// at start of input
} else if ((fragno == 1) || (fragno == 3)) {
codewords[0] = 282;
input_locn = 8;
symbol_mode = EIGHTBIT_MODE;
}
}
}
/* Check for 06 Macro Sequence and crop accordingly */
if (in_length >= 9
&& source[0] == '[' && source[1] == ')' && source[2] == '>' && source[3] == '\x1e'
&& source[4] == '0' && source[5] == '6' && source[6] == '\x1d'
&& source[in_length - 2] == '\x1e' && source[in_length - 1] == '\x04') {
if (symbol_mode == EIGHTBIT_MODE) {
codewords[codeword_count] = 271; // 06 Macro
} else {
codewords[codeword_count] = 273; // 06 Macro
}
codeword_count++;
for (i = 7; i < (in_length - 2); i++) {
crop_source[i - 7] = source[i];
}
crop_length = in_length - 9;
crop_source[crop_length] = '\0';
} else {
/* Make a cropped version of input data - removes http:// and https:// if needed */
for (i = input_locn; i < in_length; i++) {
crop_source[i - input_locn] = source[i];
}
crop_length = in_length - input_locn;
crop_source[crop_length] = '\0';
}
/* Attempt encoding in all three modes to see which offers best compaction and store results */
if (symbol->option_3 == ULTRA_COMPRESSION || gs1) {
current_mode = symbol_mode;
input_locn = 0;
do {
end_char = input_locn + PREDICT_WINDOW;
eightbit_score = look_ahead_eightbit(crop_source, crop_length, input_locn, current_mode, end_char,
cw_fragment, &fragment_length, gs1);
ascii_score = look_ahead_ascii(crop_source, crop_length, input_locn, current_mode, symbol_mode,
end_char, cw_fragment, &fragment_length, &ascii_encoded, gs1);
subset = c43_should_latch_other(crop_source, crop_length, input_locn, 1 /*subset*/, gs1) ? 2 : 1;
c43_score = look_ahead_c43(crop_source, crop_length, input_locn, current_mode, end_char,
subset, cw_fragment, &fragment_length, &c43_encoded, gs1, 0 /*debug*/);
mode[input_locn] = 'a';
current_mode = ASCII_MODE;
if ((c43_score > ascii_score) && (c43_score > eightbit_score)) {
mode[input_locn] = 'c';
current_mode = C43_MODE;
} else if ((eightbit_score > ascii_score) && (eightbit_score > c43_score)) {
mode[input_locn] = '8';
current_mode = EIGHTBIT_MODE;
}
if (mode[input_locn] == 'a') {
for (i = 0; i < ascii_encoded; i++) {
mode[input_locn + i] = 'a';
}
input_locn += ascii_encoded;
} else if (mode[input_locn] == 'c') {
for (i = 0; i < c43_encoded; i++) {
mode[input_locn + i] = 'c';
}
input_locn += c43_encoded;
} else {
input_locn++;
}
} while (input_locn < crop_length);
} else {
// Force eight-bit mode
for (input_locn = 0; input_locn < crop_length; input_locn++) {
mode[input_locn] = '8';
}
}
mode[crop_length] = '\0';
if (symbol->debug & ZINT_DEBUG_PRINT) {
printf("Mode (%d): %s\n", (int) strlen(mode), mode);
}
/* Use results from test to perform actual mode switching */
current_mode = symbol_mode;
input_locn = 0;
do {
fragment_length = 0;
block_length = 0;
while (input_locn + block_length < crop_length && mode[input_locn + block_length] == mode[input_locn]) {
block_length++;
}
switch (mode[input_locn]) {
case 'a':
look_ahead_ascii(crop_source, crop_length, input_locn, current_mode, symbol_mode,
input_locn + block_length, cw_fragment, &fragment_length, NULL, gs1);
current_mode = ASCII_MODE;
break;
case 'c':
subset = c43_should_latch_other(crop_source, crop_length, input_locn, 1 /*subset*/, gs1) ? 2 : 1;
look_ahead_c43(crop_source, crop_length, input_locn, current_mode, input_locn + block_length, subset,
cw_fragment, &fragment_length, NULL, gs1, symbol->debug);
/* Substitute temporary latch if possible */
if ((current_mode == EIGHTBIT_MODE) && (cw_fragment[0] == 260)
&& (fragment_length >= 5) && (fragment_length <= 11)) {
/* Temporary latch to submode 1 from Table 11 */
cw_fragment[0] = 256 + ((fragment_length - 5) / 2);
} else if ((current_mode == EIGHTBIT_MODE) && (cw_fragment[0] == 266)
&& (fragment_length >= 5) && (fragment_length <= 11)) {
/* Temporary latch to submode 2 from Table 11 */
cw_fragment[0] = 262 + ((fragment_length - 5) / 2);
} else if ((current_mode == ASCII_MODE) && (cw_fragment[0] == 278)
&& (fragment_length >= 5) && (fragment_length <= 11)) {
/* Temporary latch to submode 1 from Table 9 */
cw_fragment[0] = 274 + ((fragment_length - 5) / 2);
} else {
current_mode = C43_MODE;
}
break;
case '8':
look_ahead_eightbit(crop_source, crop_length, input_locn, current_mode, input_locn + block_length,
cw_fragment, &fragment_length, gs1);
current_mode = EIGHTBIT_MODE;
break;
}
for (i = 0; i < fragment_length; i++) {
codewords[codeword_count + i] = cw_fragment[i];
}
codeword_count += fragment_length;
input_locn += block_length;
} while (input_locn < crop_length);
return codeword_count;
}
INTERNAL int ultra(struct zint_symbol *symbol, unsigned char source[], int length) {
int data_cw_count = 0;
int acc, qcc;
int scr[3] = {0}, scr_cw_count = 0; /* Symbol Control Region (only if have Structured Append) */
int dr_count;
int ecc_level;
int rows, columns;
int total_cws;
int pads;
int cw_memalloc;
// Allow for 3 pads in final 57th (60th incl. clock tracks) column of 5-row symbol (57 * 5 == 285)
int codeword[282 + 3];
int i, j, locn;
int total_height, total_width;
char tilepat[6];
int tilex, tiley;
int dcc;
int revision_idx = 0;
#ifdef _MSC_VER
int *data_codewords;
char *pattern;
#endif /* _MSC_VER */
if (symbol->eci > 811799) {
strcpy(symbol->errtxt, "590: ECI value not supported by Ultracode");
return ZINT_ERROR_INVALID_OPTION;
}
if (symbol->structapp.count) {
int link2 = 2; /* Draft Table 7, Structured Append Group (SAG) with no File Number */
if (symbol->structapp.count < 2 || symbol->structapp.count > 8) {
strcpy(symbol->errtxt, "558: Structured Append count out of range (2-8)");
return ZINT_ERROR_INVALID_OPTION;
}
if (symbol->structapp.index < 1 || symbol->structapp.index > symbol->structapp.count) {
sprintf(symbol->errtxt, "559: Structured Append index out of range (1-%d)", symbol->structapp.count);
return ZINT_ERROR_INVALID_OPTION;
}
scr_cw_count = 1;
if (symbol->structapp.id[0]) {
int id, id_len;
for (id_len = 0; id_len < 32 && symbol->structapp.id[id_len]; id_len++);
if (id_len > 5) { /* 282 * 283 + 282 = 80088 */
strcpy(symbol->errtxt, "727: Structured Append ID too long (5 digit maximum)");
return ZINT_ERROR_INVALID_OPTION;
}
id = to_int((const unsigned char *) symbol->structapp.id, id_len);
if (id == -1) {
strcpy(symbol->errtxt, "728: Invalid Structured Append ID (digits only)");
return ZINT_ERROR_INVALID_OPTION;
}
if (id > 80088) {
sprintf(symbol->errtxt, "729: Structured Append ID '%d' out of range (1-80088)", id);
return ZINT_ERROR_INVALID_OPTION;
}
if (id) {
link2 = 3; /* Missing from draft Table 7 but mentioned 7.4.3 - SAG with File Number */
scr[1] = id / 283;
scr[2] = id % 283; /* 7.4.3.2 says 1-282 but can be 0 if id >= 283 */
scr_cw_count += 2;
}
}
scr[0] = link2 * 70 + (symbol->structapp.count - 1) * 8 + symbol->structapp.index - 1;
}
cw_memalloc = length * 2;
if (cw_memalloc < 283) {
cw_memalloc = 283;
}
#ifndef _MSC_VER
int data_codewords[cw_memalloc];
#else
data_codewords = (int *) _alloca(cw_memalloc * sizeof(int));
#endif /* _MSC_VER */
data_cw_count = ultra_generate_codewords(symbol, source, length, data_codewords);
if (symbol->debug & ZINT_DEBUG_PRINT) {
printf("Codewords (%d):", data_cw_count);
for (i = 0; i < data_cw_count; i++) {
printf(" %d", data_codewords[i]);
}
printf("\n");
}
#ifdef ZINT_TEST
if (symbol->debug & ZINT_DEBUG_TEST) {
debug_test_codeword_dump_int(symbol, data_codewords, data_cw_count);
}
#endif
data_cw_count += 2 + scr_cw_count; // 2 == MCC + ACC (data codeword count includes start char)
if (symbol->option_2 > 0) {
if (symbol->option_2 > 2) {
strcpy(symbol->errtxt, "592: Revision must be 1 or 2");
return ZINT_ERROR_INVALID_OPTION;
}
if (symbol->option_2 == 2) { /* Revision 2, swop and inversion of DCCU/DCCL tiles */
revision_idx = 1;
}
}
/* Default ECC level is EC2 */
if ((symbol->option_1 <= 0) || (symbol->option_1 > 6)) {
ecc_level = 2;
} else {
ecc_level = symbol->option_1 - 1;
}
/* ECC calculation from section 7.7.2 */
if (ecc_level == 0) {
qcc = 3;
} else {
if ((data_cw_count % 25) == 0) {
qcc = (kec[ecc_level] * (data_cw_count / 25)) + 3 + 2;
} else {
qcc = (kec[ecc_level] * ((data_cw_count / 25) + 1)) + 3 + 2;
}
}
if (symbol->debug & ZINT_DEBUG_PRINT) {
printf("EC%d codewords: %d\n", ecc_level + 1, qcc);
}
acc = qcc - 3;
if (scr_cw_count) {
acc += 70; /* Link1 = 1 (* 70) means SCR present */
}
if (symbol->debug & ZINT_DEBUG_PRINT) {
printf("MCC: %d, ACC: %d, SCR: %d", data_cw_count, acc, scr_cw_count);
if (scr_cw_count) {
printf(", SCR0: %d", scr[0]);
if (scr_cw_count > 1) {
printf(", SCR1: %d, SCR2: %d", scr[1], scr[2]);
}
}
printf("\n");
}
/* Maximum capacity is 282 codewords */
total_cws = data_cw_count + qcc + 3; // 3 == TCC pattern + RSEC pattern + QCC pattern
if (total_cws - 3 > 282) {
strcpy(symbol->errtxt, "591: Data too long for selected error correction capacity");
return ZINT_ERROR_TOO_LONG;
}
rows = 5;
for (i = 2; i >= 0; i--) {
// Total codewords less 6 (+ SCR) overhead (Start + MCC + ACC (+ SCR) + 3 TCC/RSEC/QCC patterns)
if (total_cws - (6 + scr_cw_count) <= ultra_maxsize[i]) {
rows--;
}
}
if ((total_cws % rows) == 0) {
pads = 0;
columns = total_cws / rows;
} else {
pads = rows - (total_cws % rows);
columns = (total_cws / rows) + 1;
}
columns += columns / 15; // Secondary vertical clock tracks
if (symbol->debug & ZINT_DEBUG_PRINT) {
printf("Calculated size is %d rows by %d columns (pads %d)\n", rows, columns, pads);
}
/* Insert MCC and ACC and possibly SCR into data codewords */
for (i = 282; i > 2 + scr_cw_count; i--) {
data_codewords[i] = data_codewords[i - (2 + scr_cw_count)];
}
data_codewords[1] = data_cw_count; // MCC
data_codewords[2] = acc; // ACC
for (i = 0; i < scr_cw_count; i++) { // SCR
data_codewords[3 + i] = scr[i];
}
/* Calculate error correction codewords (RSEC) */
ultra_gf283((short) data_cw_count, (short) qcc, data_codewords);
if (symbol->debug & ZINT_DEBUG_PRINT) {
printf("ECCs (%d):", qcc);
for (i = 0; i < qcc; i++) {
printf(" %d", data_codewords[(282 - qcc) + i]);
}
printf("\n");
}
/* Rearrange to make final codeword sequence */
locn = 0;
codeword[locn++] = data_codewords[282 - (data_cw_count + qcc)]; // Start Character
codeword[locn++] = data_cw_count; // MCC
for (i = 0; i < qcc; i++) {
codeword[locn++] = data_codewords[(282 - qcc) + i]; // RSEC Region
}
codeword[locn++] = data_cw_count + qcc; // TCC = C + Q - section 6.11.4
codeword[locn++] = 283; // Separator
codeword[locn++] = acc; // ACC
for (i = 0; i < scr_cw_count; i++) { // SCR
codeword[locn++] = scr[i];
}
dr_count = data_cw_count - (3 + scr_cw_count);
for (i = 0; i < dr_count; i++) {
codeword[locn++] = data_codewords[(282 - (dr_count + qcc)) + i]; // Data Region
}
for (i = 0; i < pads; i++) {
codeword[locn++] = 284; // Pad pattern
}
codeword[locn++] = qcc; // QCC
if (symbol->debug & ZINT_DEBUG_PRINT) {
printf("Rearranged codewords with ECC:\n");
for (i = 0; i < locn; i++) {
printf("%d ", codeword[i]);
}
printf("\n");
}
total_height = (rows * 6) + 1;
total_width = columns + 6;
/* Build symbol */
#ifndef _MSC_VER
char pattern[total_height * total_width];
#else
pattern = (char *) _alloca(total_height * total_width);
#endif /* _MSC_VER */
for (i = 0; i < (total_height * total_width); i++) {
pattern[i] = 'W';
}
/* Border */
for (i = 0; i < total_width; i++) {
pattern[i] = 'K'; // Top
pattern[(total_height * total_width) - i - 1] = 'K'; // Bottom
}
for (i = 0; i < total_height; i++) {
pattern[total_width * i] = 'K'; // Left
pattern[(total_width * i) + 3] = 'K';
pattern[(total_width * i) + (total_width - 1)] = 'K'; // Right
}
/* Clock tracks */
for (i = 0; i < total_height; i += 2) {
pattern[(total_width * i) + 1] = 'K'; // Primary vertical clock track
if (total_width > 20) {
pattern[(total_width * i) + 19] = 'K'; // Secondary vertical clock track
}
if (total_width > 36) {
pattern[(total_width * i) + 35] = 'K'; // Secondary vertical clock track
}
if (total_width > 52) {
pattern[(total_width * i) + 51] = 'K'; // Secondary vertical clock track
}
}
for (i = 6; i < total_height; i += 6) {
for (j = 5; j < total_width; j += 2) {
pattern[(total_width * i) + j] = 'K'; // Horizontal clock track
}
}
/* Place tiles */
tilepat[5] = '\0';
tilex = 0;
tiley = 0;
for (i = 0; i < locn; i++) {
for (j = 0; j < 5; j++) {
tilepat[4 - j] = ultra_colour[(tiles[codeword[i]] >> (3 * j)) & 0x07];
}
if ((tiley + 1) >= total_height) {
tiley = 0;
tilex++;
if (tilex == 14) {
tilex++;
} else if (tilex == 30) {
tilex++;
} else if (tilex == 46) {
tilex++;
}
}
for (j = 0; j < 5; j++) {
pattern[((tiley + j + 1) * total_width) + (tilex + 5)] = tilepat[j];
}
tiley += 6;
}
/* Add data column count */
dcc = columns - ultra_mincols[rows - 2];
tilex = 2;
tiley = (total_height - 11) / 2;
/* DCCU */
for (j = 0; j < 5; j++) {
tilepat[4 - j] = ultra_colour[(dccu[revision_idx][dcc] >> (3 * j)) & 0x07];
}
for (j = 0; j < 5; j++) {
pattern[((tiley + j) * total_width) + tilex] = tilepat[j];
}
/* DCCL */
tiley += 6;
for (j = 0; j < 5; j++) {
tilepat[4 - j] = ultra_colour[(dccl[revision_idx][dcc] >> (3 * j)) & 0x07];
}
for (j = 0; j < 5; j++) {
pattern[((tiley + j) * total_width) + tilex] = tilepat[j];
}
if (symbol->debug & ZINT_DEBUG_PRINT) {
printf("DCC: %d\n", dcc);
for (i = 0; i < (total_height * total_width); i++) {
printf("%c", pattern[i]);
if ((i + 1) % total_width == 0) {
printf("\n");
}
}
}
/* Put pattern into symbol */
symbol->rows = total_height;
symbol->width = total_width;
for (i = 0; i < total_height; i++) {
symbol->row_height[i] = 1;
for (j = 0; j < total_width; j++) {
set_module_colour(symbol, i, j, posn(ultra_colour, pattern[(i * total_width) + j]));
}
}
symbol->height = total_height;
return 0;
}
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