lint_iso3166.c File Reference

Purpose

The iso3166 linter ensures that the data represents a valid ISO 3166 "num-3" country code.

Remarks

The three-digit country codes are defined by ISO 3166-1: Codes for the representation of names of countries and their subdivisions - Part 1: Country code as the "num-3" codes.

Functional Description

gs1_lint_iso3166()

GS1_SYNTAX_DICTIONARY_API gs1_lint_err_t gs1_lint_iso3166	(	const char *const	data,
		size_t *const	err_pos,
		size_t *const	err_len
	)

Used to validate that an AI component is an ISO 3166 "num-3" country code.

Note

To enable this linter to hook into an alternative ISO 3166 "num-3" lookup function (provided by the user) the GS1_LINTER_CUSTOM_ISO3166_LOOKUP_H macro may be set to the name of a header file to be included that defines a custom GS1_LINTER_CUSTOM_ISO3166_LOOKUP macro.

If provided, the GS1_LINTER_CUSTOM_ISO3166_LOOKUP macro shall invoke whatever functionality is available in the user-provided lookup function, then using the result must assign to a locally-scoped variable as follows:

• valid: Set to 1 if the lookup was successful. Otherwise 0.

Parameters

[in]	data	Pointer to the null-terminated data to be linted. Must not be NULL.
[out]	err_pos	To facilitate error highlighting, the start position of the bad data is written to this pointer, if not NULL.
[out]	err_len	The length of the bad data is written to this pointer, if not NULL.

Returns

GS1_LINTER_OK if okay.

GS1_LINTER_NOT_ISO3166 if the data is not a num-3 country code.

{
 
        /*
         * Allow for a custom replacement of the lookup code to be provided.
         *
         */
#ifdef GS1_LINTER_CUSTOM_ISO3166_LOOKUP
#define GS1_LINTER_ISO3166_LOOKUP(cc) GS1_LINTER_CUSTOM_ISO3166_LOOKUP(cc)
#else
 
        /*
         *  Set of ISO 3166 num-3 country codes
         *
         *  MAINTENANCE NOTE:
         *
         *  Updates to the ISO 3166 num-3 country code list are provided here:
         *
         *  https://isotc.iso.org/livelink/livelink?func=ll&objId=16944257&objAction=browse&viewType=1
         *
         */
        static const uint64_t iso3166[] = {
#if __STDC_VERSION__ >= 202311L
                0b0000100010101000100010001000100110001000100010001011100010001000,  // 000-063: 004 008 010 012 016 020 024 028 031-032 036 040 044 048 050-052 056 060
                0b1000101010101000000010100010100010001000100010001000100010001000,  // 064-127: 064 068 070 072 074 076 084 086 090 092 096 100 104 108 112 116 120 124
                0b0000100010001000100010001000101000100010001000110010100010001001,  // 128-191: 132 136 140 144 148 152 156 158 162 166 170 174 175 178 180 184 188 191
                0b1000100000011000100010100010001000100001111000110010001010100010,  // 192-255: 192 196 203-204 208 212 214 218 222 226 231-234 238-239 242 246 248 250 254
                0b0010101000101010000110000000000010001000100010001000100010001000,  // 256-319: 258 260 262 266 268 270 275 276 288 292 296 300 304 308 312 316
                0b1000100010001010100010001000100010001000100010001000100010001000,  // 320-383: 320 324 328 332 334 336 340 344 348 352 356 360 364 368 372 376 380
                0b1000100010000010100010001010001001100010001010100010001010100010,  // 384-447: 384 388 392 398 400 404 408 410 414 417-418 422 426 428 430 434 438 440 442 446
                0b0010001000100010001000100010001010001000000010001011100010001000,  // 448-511: 450 454 458 462 466 470 474 478 480 484 492 496 498-500 504 508
                0b1000100010001000100101110000100000001000001000100010001000100010,  // 512-575: 512 516 520 524 528 531 533-535 540 548 554 558 562 566 570 574
                0b0010110111100001000000101000100010001000100010001010001000100010,  // 576-639: 578 580 581 583 584 585 586 591 598 600 604 608 612 616 620 624 626 630 634 638
                0b0011001000001010000110110010001000100010001000101010001000000011,  // 640-703: 642 643 646 652 654 659 660 662 663 666 670 674 678 682 686 688 690 694 702 703
                0b1110001000001000000010001100100000001000100010001000100010101000,  // 704-767: 704 705 706 710 716 724 728 729 732 740 744 748 752 756 760 762 764
                0b1000100010001000100010001001101010001001000000000010000000100001,  // 768-831: 768 772 776 780 784 788 792 795 796 798 800 804 807 818 826 831
                0b1110000010000000001000100010101000000000000010000010000100000010,  // 832-895: 832 833 834 840 850 854 858 860 862 876 882 887 894
                0b0000000000000000000000000000000000000000000000000000000000000000,  // 896-959:
                0b0000000000000000000000000000000000000000000000000000000000000000,  // 960-999:
#else
                /*
                 *  Fallback for compilers lacking binary literal support.
                 *
                 *  Generated from the above data with:
                 *
                 *     for (size_t i = 0; i < sizeof(iso3166) / sizeof(iso3166[0]); i++) { printf("0x%016lx, ", iso3166[i]); };
                 *
                 */
                0x08a888898888b888, 0x8aa80a2888888888, 0x0888888a22232889, 0x88188a2221e322a2,
                0x2a2a180088888888, 0x888a888888888888, 0x888288a2622a22a2, 0x222222228808b888,
                0x8888970808222222, 0x2de102888888a222, 0x320a1b222222a203, 0xe20808c8088888a8,
                0x8888889a89002021, 0xe080222a00082102, 0x0000000000000000, 0x0000000000000000,
#endif
        };
 
/// \cond
#define GS1_LINTER_ISO3166_LOOKUP(cc) do {                                              \
        if (strlen(cc) == 3 && isdigit(cc[0]) && isdigit(cc[1]) && isdigit(cc[2])) {    \
                int v = (cc[0] - '0') * 100 + (cc[1] - '0') * 10 + cc[2] - '0';         \
                GS1_LINTER_BITFIELD_LOOKUP(v, iso3166);                                 \
        }                                                                               \
} while (0)
/// \endcond
 
#endif
 
        int valid = 0;
 
        assert(data);
 
        /*
         * Ensure that the data is in the list.
         *
         */
        GS1_LINTER_ISO3166_LOOKUP(data);
        if (GS1_LINTER_LIKELY(valid))
                GS1_LINTER_RETURN_OK;
 
        /*
         * If not valid then indicate an error.
         *
         */
        GS1_LINTER_RETURN_ERROR(
                GS1_LINTER_NOT_ISO3166,
                0,
                strlen(data)
        );
 
}