GS1 Syntax Dictionary: Linter reference
A reference to the AI component linter routines referred to by the GS1 Syntax Dictionary. Copyright (c) 2022-2024 GS1 AISBL.
lint_mmoptss.c File Reference

Purpose

The mmoptss linter ensures that the data represents a meaningful time fragment as minutes and optional seconds, in MMSS or MM format.

Functional Description

◆ gs1_lint_mmoptss()

GS1_SYNTAX_DICTIONARY_API gs1_lint_err_t gs1_lint_mmoptss ( const char *const  data,
size_t *const  err_pos,
size_t *const  err_len 
)

Used to ensure that an AI component conforms to one of the MMSS or MM formats.

Parameters
[in]dataPointer to the null-terminated data to be linted. Must not be NULL.
[out]err_posTo facilitate error highlighting, the start position of the bad data is written to this pointer, if not NULL.
[out]err_lenThe length of the bad data is written to this pointer, if not NULL.
Returns
GS1_LINTER_OK if okay.
GS1_LINTER_MMSS_INVALID_LENGTH if the data neither two not two characters.
GS1_LINTER_NON_DIGIT_CHARACTER if the data contains a non-digit character.
GS1_LINTER_ILLEGAL_MINUTE if the data contains an invalid minute.
GS1_LINTER_ILLEGAL_SECOND if the data contains an invalid second.
54{
55
56 size_t len, pos;
57
58 assert(data);
59
60 len = strlen(data);
61
62 /*
63 * Data must be two or four characters.
64 *
65 */
66 if (len != 2 && len != 4) {
67 if (err_pos) *err_pos = 0;
68 if (err_len) *err_len = len;
70 }
71
72 /*
73 * Data must consist of all digits.
74 *
75 */
76 if ((pos = strspn(data, "0123456789")) != len) {
77 if (err_pos) *err_pos = pos;
78 if (err_len) *err_len = 1;
80 }
81
82 /*
83 * Validate the minute.
84 *
85 */
86 if ((data[0] - '0') * 10 + (data[1] - '0') > 59) {
87 if (err_pos) *err_pos = 0;
88 if (err_len) *err_len = 2;
90 }
91
92 /*
93 * Validate the second, if it is provided.
94 *
95 */
96 if (len == 4 && (data[2] - '0') * 10 + (data[3] - '0') > 59) {
97 if (err_pos) *err_pos = 2;
98 if (err_len) *err_len = 2;
100 }
101
102 return GS1_LINTER_OK;
103
104}
@ GS1_LINTER_ILLEGAL_MINUTE
The time contains an illegal minute.
Definition gs1syntaxdictionary.h:104
@ GS1_LINTER_MMSS_INVALID_LENGTH
The minutes with optional seconds has an incorrect length for either MMSS or MM format.
Definition gs1syntaxdictionary.h:100
@ GS1_LINTER_ILLEGAL_SECOND
The time contains an illegal seconds.
Definition gs1syntaxdictionary.h:105
@ GS1_LINTER_OK
No issues were detected by the linter.
Definition gs1syntaxdictionary.h:66
@ GS1_LINTER_NON_DIGIT_CHARACTER
A non-digit character was found where a digit is expected.
Definition gs1syntaxdictionary.h:67