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New symbology: DPD Code (variation of Code 128)

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Robin Stuart 2020-08-03 12:13:05 +01:00
parent 42e866c889
commit 13f4a3547d
6 changed files with 129 additions and 32 deletions
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75
backend/code128.c
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@ -1105,3 +1105,78 @@ INTERNAL int ean_14(struct zint_symbol *symbol, unsigned char source[], int leng
return error_number;
}
/* DPD (Deutsher Paket Dienst) Code */
/* Specification at ftp://dpd.at/Datenspezifikationen/EN/gbs_V4.0.2_hauptdokument.pdf
* or https://docplayer.net/33728877-Dpd-parcel-label-specification.html */
INTERNAL int dpd_parcel(struct zint_symbol *symbol, unsigned char source[], int length) {
int error_number = 0;
int i, p;
char identifier;
const int mod = 36;
int cd; // Check digit
if (length != 28) {
strcpy(symbol->errtxt, "349: DPD input wrong length");
return ZINT_ERROR_TOO_LONG;
}
identifier = source[0];
source[0] = 'A';
to_upper(source);
error_number = is_sane(KRSET, source, length);
if (error_number == ZINT_ERROR_INVALID_DATA) {
strcpy(symbol->errtxt, "350: Invalid character in DPD data");
return error_number;
}
if ((identifier < 32) || (identifier > 127)) {
strcpy(symbol->errtxt, "351: Invalid DPD identifier");
return ZINT_ERROR_INVALID_DATA;
}
source[0] = identifier;
error_number = code_128(symbol, source, length);
cd = mod;
p = 0;
for (i = 1; i < length; i++) {
symbol->text[p] = source[i];
p++;
cd += posn(KRSET, source[i]);
if (cd > mod) cd -= mod;
cd *= 2;
if (cd >= (mod + 1)) cd -= mod + 1;
switch (i) {
case 4:
case 7:
case 11:
case 15:
case 19:
case 21:
case 24:
case 27:
symbol->text[p] = ' ';
p++;
break;
}
}
cd = mod + 1 - cd;
if (cd == mod) cd = 0;
if (cd < 10) {
symbol->text[p] = cd + '0';
} else {
symbol->text[p] = (cd - 10) + 'A';
}
p++;
symbol->text[p] = '\0';
return error_number;
}