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Improved handling of partial row data

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Bug reported by Edgard Lima and fixed by Milton Neal
This commit is contained in:
Robin Stuart 2016-10-15 10:54:23 +01:00
parent dd80371b17
commit cfda2067b1
1 changed files with 21 additions and 30 deletions
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49
backend/rss.c
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@ -2061,7 +2061,7 @@ int rss_binary_string(struct zint_symbol *symbol, char source[], char binary_str
/* GS1 DataBar Expanded */
int rssexpanded(struct zint_symbol *symbol, unsigned char source[], int src_len) {
int i, j, k, l, p, data_chars, vs[21], group[21], v_odd[21], v_even[21];
int i, j, k, p, data_chars, vs[21], group[21], v_odd[21], v_even[21];
char substring[21][14], latch;
int char_widths[21][8], checksum, check_widths[8], c_group;
int check_char, c_odd, c_even, elements[235], pattern_width, reader, writer;
@ -2205,11 +2205,6 @@ int rssexpanded(struct zint_symbol *symbol, unsigned char source[], int src_len)
elements[i] = 0;
}
elements[0] = 1;
elements[1] = 1;
elements[pattern_width - 2] = 1;
elements[pattern_width - 1] = 1;
/* Put finder patterns in element array */
for (i = 0; i < (((data_chars + 1) / 2) + ((data_chars + 1) & 1)); i++) {
k = ((((((data_chars + 1) - 2) / 2) + ((data_chars + 1) & 1)) - 1) * 11) + i;
@ -2239,6 +2234,13 @@ int rssexpanded(struct zint_symbol *symbol, unsigned char source[], int src_len)
if ((symbol->symbology == BARCODE_RSS_EXP) || (symbol->symbology == BARCODE_RSS_EXP_CC)) {
/* Copy elements into symbol */
elements[0] = 1; // left guard
elements[1] = 1;
elements[pattern_width - 2] = 1; // right guard
elements[pattern_width - 1] = 1;
writer = 0;
latch = '0';
for (i = 0; i < pattern_width; i++) {
@ -2328,7 +2330,7 @@ int rssexpanded(struct zint_symbol *symbol, unsigned char source[], int src_len)
special_case_row = 0;
/* Row Start */
sub_elements[0] = 1;
sub_elements[0] = 1; // left guard
sub_elements[1] = 1;
elements_in_sub = 2;
@ -2343,33 +2345,19 @@ int rssexpanded(struct zint_symbol *symbol, unsigned char source[], int src_len)
i = 2 + (current_block * 21);
for (j = 0; j < 21; j++) {
if ((i + j) < pattern_width) {
sub_elements[j + (reader * 21) + 2] = elements[i + j];
elements_in_sub++;
sub_elements[j + (reader * 21) + 2] = elements[i + j];
}
elements_in_sub++;
}
} else {
/* right to left */
left_to_right = 0;
if ((current_row * symbol->option_2) < codeblocks) {
/* a full row */
i = 2 + (((current_row * symbol->option_2) - reader - 1) * 21);
for (j = 0; j < 21; j++) {
if ((i + j) < pattern_width) {
i = 2 + (((current_row * symbol->option_2) - reader - 1) * 21);
for (j = 0; j < 21; j++) {
if ((i + j) < pattern_width) {
sub_elements[(20 - j) + (reader * 21) + 2] = elements[i + j];
elements_in_sub++;
}
}
} else {
/* a partial row */
k = ((current_row * symbol->option_2) - codeblocks);
l = (current_row * symbol->option_2) - reader - 1;
i = 2 + ((l - k) * 21);
for (j = 0; j < 21; j++) {
if ((i + j) < pattern_width) {
sub_elements[(20 - j) + (reader * 21) + 2] = elements[i + j];
elements_in_sub++;
}
}
elements_in_sub++;
}
}
reader++;
@ -2377,7 +2365,7 @@ int rssexpanded(struct zint_symbol *symbol, unsigned char source[], int src_len)
} while ((reader < symbol->option_2) && (current_block < codeblocks));
/* Row Stop */
sub_elements[elements_in_sub] = 1;
sub_elements[elements_in_sub] = 1; // right guard
sub_elements[elements_in_sub + 1] = 1;
elements_in_sub += 2;
@ -2428,7 +2416,7 @@ int rssexpanded(struct zint_symbol *symbol, unsigned char source[], int src_len)
symbol->row_height[symbol->rows - 1] = 1;
/* finder bar adjustment */
for (j = 0; j < reader; j++) {
k = (49 * j) + (special_case_row ? 19 : 18);
k = (49 * j) + 18 + special_case_row;
if (left_to_right) {
for (i = 0; i < 15; i++) {
if ((!(module_is_set(symbol, symbol->rows, i + k - 1))) &&
@ -2438,6 +2426,9 @@ int rssexpanded(struct zint_symbol *symbol, unsigned char source[], int src_len)
}
}
} else {
if ((current_row == stack_rows) && (data_chars % 2 == 0)) {
k -= 18;
}
for (i = 14; i >= 0; i--) {
if ((!(module_is_set(symbol, symbol->rows, i + k + 1))) &&
(!(module_is_set(symbol, symbol->rows, i + k))) &&