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gs1_lint_parse_raw_caret: check that data of AIs with non-predefined

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lengths are terminated with separators (unless last)
  (ticket #352, props Simon Resch)
This commit is contained in:
gitlost
2026-03-18 14:24:40 +00:00
parent b3a3c0d3b4
commit db03f0b304
3 changed files with 13 additions and 6 deletions
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8
backend/gs1_lint.h
View File

@@ -1414,7 +1414,7 @@ static int gs1_lint_parse_raw_caret(const unsigned char source[], const int leng
}
while (i < length) {
int data_start, data_max, on_separator;
int data_start, data_max, on_separator, is_predefined_len;
assert(ai_count < ai_max);
ai_locs[ai_count] = i;
if (!gs1_lint_parse_ai(source, length, i, &ai, NULL /*min*/, &max)) {
@@ -1426,6 +1426,7 @@ static int gs1_lint_parse_raw_caret(const unsigned char source[], const int leng
}
ai_vals[ai_count] = ai;
ai_len = ai < 100 ? 2 : ai < 1000 ? 3 : 4;
is_predefined_len = gs1_predefined_len(source + ai_locs[ai_count]);
/* Following GS1 Syntax Engine tolerating superfluous FNC1s at end of AI data
(for both final AI and AIs with predefined length) */
@@ -1437,9 +1438,10 @@ static int gs1_lint_parse_raw_caret(const unsigned char source[], const int leng
}
}
data_locs[ai_count] = data_start;
/* Only checking that have at least one char, and haven't exceeded max */
/* Only checking that have at least one char, haven't exceeded max, and have separator if not predefined */
on_separator = j < length && source[j] == separator;
if (j == data_start || (j + 1 == length && length > data_max && !on_separator)) {
if (j == data_start || (j + 1 == length && length > data_max && !on_separator)
|| (j + 1 < length && !on_separator && !is_predefined_len)) {
*p_ai_count = ai_count; /* For feedback */
data_lens[ai_count] = j - data_start;
*p_err_no = 2;

3
backend/tests/test_gs1.c
View File

@@ -3421,6 +3421,9 @@ static void test_gs1_lint_parse_raw_caret(const testCtx *const p_ctx) {
/* 44*/ { "^2551234567890128^39401234^4101234567890128", 1, 3, { 255, 3940, 410, 0 }, { 1, 18, 27, 0 }, { 4, 22, 30, 0 }, { 13, 4, 13, 0 }, 0, 0 },
/* 45*/ { "2551234567890128\03539401234\0354101234567890128", 1, 3, { 255, 3940, 410, 0 }, { 0, 17, 26, 0 }, { 3, 21, 29, 0 }, { 13, 4, 13, 0 }, 0, 0 },
/* 46*/ { "\0352551234567890128\03539401234\0354101234567890128", 1, 3, { 255, 3940, 410, 0 }, { 1, 18, 27, 0 }, { 4, 22, 30, 0 }, { 13, 4, 13, 0 }, 0, 0 },
/* 47*/ { "1012345678901234567890211", 0, 0, { 10, 0, 0, 0 }, { 0, 0, 0, 0 }, { 2, 0, 0, 0 }, { 20, 0, 0, 0 }, 2, 1 }, /* Ticket #352, props Simon Resch */
/* 48*/ { "^1012345678901234567890^211", 1, 2, { 10, 21, 0, 0 }, { 1, 24, 0, 0 }, { 3, 26, 0, 0 }, { 20, 1, 0, 0 }, 0, 0 },
/* 49*/ { "1012345678901234567890\035211", 1, 2, { 10, 21, 0, 0 }, { 0, 23, 0, 0 }, { 2, 25, 0, 0 }, { 20, 1, 0, 0 }, 0, 0 },
};
const int data_size = ARRAY_SIZE(data);
int i, length, ret;

8
backend/tools/gen_gs1_lint.php
View File

@@ -666,7 +666,7 @@ $tab{$tab}return 0;
{$tab}}
{$tab}while (i < length) {
$tab{$tab}int data_start, data_max, on_separator;
$tab{$tab}int data_start, data_max, on_separator, is_predefined_len;
$tab{$tab}assert(ai_count < ai_max);
$tab{$tab}ai_locs[ai_count] = i;
$tab{$tab}if (!gs1_lint_parse_ai(source, length, i, &ai, NULL /*min*/, &max)) {
@@ -678,6 +678,7 @@ $tab$tab{$tab}return 0;
$tab{$tab}}
$tab{$tab}ai_vals[ai_count] = ai;
$tab{$tab}ai_len = ai < 100 ? 2 : ai < 1000 ? 3 : 4;
$tab{$tab}is_predefined_len = gs1_predefined_len(source + ai_locs[ai_count]);
$tab{$tab}/* Following GS1 Syntax Engine tolerating superfluous FNC1s at end of AI data
$tab{$tab} (for both final AI and AIs with predefined length) */
@@ -689,9 +690,10 @@ $tab$tab$tab{$tab}break;
$tab$tab{$tab}}
$tab{$tab}}
$tab{$tab}data_locs[ai_count] = data_start;
$tab{$tab}/* Only checking that have at least one char, and haven't exceeded max */
$tab{$tab}/* Only checking that have at least one char, haven't exceeded max, and have separator if not predefined */
$tab{$tab}on_separator = j < length && source[j] == separator;
$tab{$tab}if (j == data_start || (j + 1 == length && length > data_max && !on_separator)) {
$tab{$tab}if (j == data_start || (j + 1 == length && length > data_max && !on_separator)
$tab{$tab}{$tab}{$tab}|| (j + 1 < length && !on_separator && !is_predefined_len)) {
$tab$tab{$tab}*p_ai_count = ai_count; /* For feedback */
$tab$tab{$tab}data_lens[ai_count] = j - data_start;
$tab$tab{$tab}*p_err_no = 2;