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gs1: update to latest gs1-syntax-dictionary (new lint keyoff1());

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in `key()` (& hence `keyoff1()`) check for GS1 Company Prefix
  length >= 4 (same as gs1-syntax-dictionary lints)
manual: update some standard years
This commit is contained in:
gitlost
2025-01-31 21:20:43 +00:00
parent 53cb29dbc6
commit 3f7cfd47c7
10 changed files with 879 additions and 839 deletions
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33
backend/gs1.c
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@@ -245,6 +245,8 @@ static int csumalpha(const unsigned char *data, int data_len, int offset, int mi
return 1;
}
#define GS1_GCP_MIN_LENGTH 4 /* Minimum length of GS1 Company Prefix */
/* Check for a GS1 Prefix (GS1 General Specifications GS1 1.4.2) */
static int key(const unsigned char *data, int data_len, int offset, int min, int max, int *p_err_no,
int *p_err_posn, char err_msg[50], const int length_only) {
@@ -262,14 +264,37 @@ static int key(const unsigned char *data, int data_len, int offset, int min, int
}
if (!length_only && data_len) {
data += offset;
int i;
if (!z_isdigit(data[0]) || !z_isdigit(data[1])) {
if (data_len < GS1_GCP_MIN_LENGTH) {
*p_err_no = 3;
*p_err_posn = offset + z_isdigit(data[0]) + 1;
sprintf(err_msg, "Non-numeric company prefix '%c'", data[z_isdigit(data[0])]);
*p_err_posn = offset + 1;
sprintf(err_msg, "GS1 Company Prefix length %d too short (minimum 4)", data_len);
return 0;
}
data += offset;
for (i = 0; i < GS1_GCP_MIN_LENGTH; i++) {
if (!z_isdigit(data[i])) {
*p_err_no = 3;
*p_err_posn = offset + i + 1;
sprintf(err_msg, "Non-numeric company prefix '%c'", data[i]);
return 0;
}
}
}
return 1;
}
/* Check for a GS1 Prefix at offset 1 (2nd position) */
static int keyoff1(const unsigned char *data, int data_len, int offset, int min, int max, int *p_err_no,
int *p_err_posn, char err_msg[50], const int length_only) {
if (!key(data, data_len, offset + 1, min - 1, max - 1, p_err_no, p_err_posn, err_msg, length_only)) {
(*p_err_posn)--;
return 0;
}
return 1;