int ugs1_verify(struct zint_symbol *symbol, uint8_t source[], const unsigned int src_len, uint8_t reduced[])
{
/* Only to keep the compiler happy */
char temp[src_len + 5];
int error_number;
error_number = gs1_verify(symbol, source, src_len, temp);
if(error_number != 0) { return error_number; }
if (strlen(temp) < src_len + 5) {
ustrcpy(reduced, (uint8_t*)temp);
return 0;
}
strcpy(symbol->errtxt, "ugs1_verify overflow");
return ZERROR_INVALID_DATA;
}
int ugs1_verify(struct zint_symbol *symbol, unsigned char source[], const unsigned int src_len, unsigned char reduced[])
{
/* Only to keep the compiler happy */
#ifndef _MSC_VER
char temp[src_len + 5];
#else
char* temp = (char*)_alloca(src_len + 5);
#endif
int error_number;
error_number = gs1_verify(symbol, source, src_len, temp);
if(error_number != 0) { return error_number; }
if (strlen(temp) < src_len + 5) {
ustrcpy(reduced, (unsigned char*)temp);
return 0;
}
strcpy(symbol->errtxt, "ugs1_verify overflow");
return ERROR_INVALID_DATA;
}
int ean_128(struct zint_symbol *symbol, unsigned char source[], int length)
{ /* Handle EAN-128 (Now known as GS1-128) */
int i, j,values[170], bar_characters, read, total_sum;
int error_number, indexchaine, indexliste;
char set[170], mode, last_set;
float glyph_count;
char dest[1000];
int separator_row, linkage_flag, c_count;
#ifndef _MSC_VER
char reduced[length + 1];
#else
char* reduced = (char*)_alloca(length + 1);
#endif
error_number = 0;
strcpy(dest, "");
linkage_flag = 0;
j = 0;
bar_characters = 0;
separator_row = 0;
memset(values, 0, sizeof(values));
memset(set, ' ', sizeof(set));
if(length > 160) {
/* This only blocks rediculously long input - the actual length of the
resulting barcode depends on the type of data, so this is trapped later */
strcpy(symbol->errtxt, "Input too long");
return ZINT_ERROR_TOO_LONG;
}
for(i = 0; i < length; i++) {
if(source[i] == '\0') {
/* Null characters not allowed! */
strcpy(symbol->errtxt, "NULL character in input data");
return ZINT_ERROR_INVALID_DATA;
}
}
/* if part of a composite symbol make room for the separator pattern */
if(symbol->symbology == BARCODE_EAN128_CC) {
separator_row = symbol->rows;
symbol->row_height[symbol->rows] = 1;
symbol->rows += 1;
}
if(symbol->input_mode != GS1_MODE) {
/* GS1 data has not been checked yet */
error_number = gs1_verify(symbol, source, length, reduced);
if(error_number != 0) { return error_number; }
}
/* Decide on mode using same system as PDF417 and rules of ISO 15417 Annex E */
indexliste = 0;
indexchaine = 0;
mode = parunmodd(reduced[indexchaine]);
if(reduced[indexchaine] == '[') {
mode = ABORC;
}
for(i = 0; i < 170; i++) {
list[0][i] = 0;
}
do {
list[1][indexliste] = mode;
while ((list[1][indexliste] == mode) && (indexchaine < strlen(reduced))) {
list[0][indexliste]++;
indexchaine++;
mode = parunmodd(reduced[indexchaine]);
if(reduced[indexchaine] == '[') { mode = ABORC; }
}
indexliste++;
} while (indexchaine < strlen(reduced));
dxsmooth(&indexliste);
/* Put set data into set[] */
read = 0;
for(i = 0; i < indexliste; i++) {
for(j = 0; j < list[0][i]; j++) {
switch(list[1][i]) {
case SHIFTA: set[read] = 'a'; break;
case LATCHA: set[read] = 'A'; break;
case SHIFTB: set[read] = 'b'; break;
case LATCHB: set[read] = 'B'; break;
case LATCHC: set[read] = 'C'; break;
}
read++;
}
}
/* Watch out for odd-length Mode C blocks */
c_count = 0;
for(i = 0; i < read; i++) {
if(set[i] == 'C') {
if(reduced[i] == '[') {
if(c_count & 1) {
if((i - c_count) != 0) {
set[i - c_count] = 'B';
} else {
set[i - 1] = 'B';
}
}
c_count = 0;
} else {
c_count++;
}
} else {
if(c_count & 1) {
if((i - c_count) != 0) {
set[i - c_count] = 'B';
} else {
set[i - 1] = 'B';
}
}
c_count = 0;
}
}
if(c_count & 1) {
if((i - c_count) != 0) {
set[i - c_count] = 'B';
} else {
set[i - 1] = 'B';
}
}
for(i = 1; i < read - 1; i++) {
if((set[i] == 'C') && ((set[i - 1] == 'B') && (set[i + 1] == 'B'))) {
set[i] = 'B';
}
}
/* for(i = 0; i < read; i++) {
printf("char %c mode %c\n", reduced[i], set[i]);
} */
/* Now we can calculate how long the barcode is going to be - and stop it from
being too long */
last_set = ' ';
glyph_count = 0.0;
for(i = 0; i < strlen(reduced); i++) {
if((set[i] == 'a') || (set[i] == 'b')) {
glyph_count = glyph_count + 1.0;
}
if(((set[i] == 'A') || (set[i] == 'B')) || (set[i] == 'C')) {
if(set[i] != last_set) {
last_set = set[i];
glyph_count = glyph_count + 1.0;
}
}
if((set[i] == 'C') && (reduced[i] != '[')) {
glyph_count = glyph_count + 0.5;
} else {
glyph_count = glyph_count + 1.0;
}
}
if(glyph_count > 80.0) {
strcpy(symbol->errtxt, "Input too long");
return ZINT_ERROR_TOO_LONG;
}
/* So now we know what start character to use - we can get on with it! */
switch(set[0])
{
case 'A': /* Start A */
concat(dest, C128Table[103]);
values[0] = 103;
break;
case 'B': /* Start B */
concat(dest, C128Table[104]);
values[0] = 104;
break;
case 'C': /* Start C */
concat(dest, C128Table[105]);
values[0] = 105;
break;
}
bar_characters++;
concat(dest, C128Table[102]);
values[1] = 102;
bar_characters++;
/* Encode the data */
read = 0;
do {
if((read != 0) && (set[read] != set[read - 1]))
{ /* Latch different code set */
switch(set[read])
{
case 'A': concat(dest, C128Table[101]);
values[bar_characters] = 101;
bar_characters++;
break;
case 'B': concat(dest, C128Table[100]);
values[bar_characters] = 100;
bar_characters++;
break;
case 'C': concat(dest, C128Table[99]);
values[bar_characters] = 99;
bar_characters++;
break;
}
}
if((set[read] == 'a') || (set[read] == 'b')) {
/* Insert shift character */
concat(dest, C128Table[98]);
values[bar_characters] = 98;
bar_characters++;
}
if(reduced[read] != '[') {
switch(set[read])
{ /* Encode data characters */
case 'A':
case 'a':
c128_set_a(reduced[read], dest, values, &bar_characters);
read++;
break;
case 'B':
case 'b':
c128_set_b(reduced[read], dest, values, &bar_characters);
read++;
break;
case 'C':
c128_set_c(reduced[read], reduced[read + 1], dest, values, &bar_characters);
read += 2;
break;
}
} else {
concat(dest, C128Table[102]);
values[bar_characters] = 102;
bar_characters++;
read++;
}
} while (read < strlen(reduced));
/* "...note that the linkage flag is an extra code set character between
the last data character and the Symbol Check Character" (GS1 Specification) */
/* Linkage flags in GS1-128 are determined by ISO/IEC 24723 section 7.4 */
switch(symbol->option_1) {
case 1:
case 2:
/* CC-A or CC-B 2D component */
switch(set[strlen(reduced) - 1]) {
case 'A': linkage_flag = 100; break;
case 'B': linkage_flag = 99; break;
case 'C': linkage_flag = 101; break;
}
break;
case 3:
/* CC-C 2D component */
switch(set[strlen(reduced) - 1]) {
case 'A': linkage_flag = 99; break;
case 'B': linkage_flag = 101; break;
case 'C': linkage_flag = 100; break;
}
break;
}
if(linkage_flag != 0) {
concat(dest, C128Table[linkage_flag]);
values[bar_characters] = linkage_flag;
bar_characters++;
}
/*for(i = 0; i < bar_characters; i++) {
printf("[%d] ", values[i]);
}
printf("\n");*/
/* check digit calculation */
total_sum = 0;
for(i = 0; i < bar_characters; i++)
{
if(i > 0)
{
values[i] *= i;
}
total_sum += values[i];
}
concat(dest, C128Table[total_sum%103]);
values[bar_characters] = total_sum % 103;
bar_characters++;
/* Stop character */
concat(dest, C128Table[106]);
values[bar_characters] = 106;
bar_characters++;
expand(symbol, dest);
/* Add the separator pattern for composite symbols */
if(symbol->symbology == BARCODE_EAN128_CC) {
for(i = 0; i < symbol->width; i++) {
if(!(module_is_set(symbol, separator_row + 1, i))) {
set_module(symbol, separator_row, i);
}
}
}
for(i = 0; i < length; i++) {
if((source[i] != '[') && (source[i] != ']')) {
symbol->text[i] = source[i];
}
if(source[i] == '[') {
symbol->text[i] = '(';
}
if(source[i] == ']') {
symbol->text[i] = ')';
}
}
return error_number;
}
