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Re commit [789e04] and [86363f] allow prefixes without check digit

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gitlost 2025-04-21 18:45:23 +01:00
parent 3592edd64e
commit 51ebca182c
12 changed files with 400 additions and 393 deletions
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16
backend/code49.c
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@ -278,6 +278,7 @@ INTERNAL int code49(struct zint_symbol *symbol, unsigned char source[], int leng
for (i = 0; i < rows - 1; i++) {
for (j = 0; j < 4; j++) {
local_value = (c_grid[i][2 * j] * 49) + c_grid[i][(2 * j) + 1];
/* Maximum value of `x/y/z_count` is at most 8 × (4 × 44 × 48 × 52) = 3514368 so won't overflow */
x_count += c49_x_weight[posn_val] * local_value;
y_count += c49_y_weight[posn_val] * local_value;
z_count += c49_z_weight[posn_val] * local_value;
@ -287,8 +288,9 @@ INTERNAL int code49(struct zint_symbol *symbol, unsigned char source[], int leng
if (rows > 6) {
/* Add Z Symbol Check */
c_grid[rows - 1][0] = (z_count % 2401) / 49;
c_grid[rows - 1][1] = (z_count % 2401) % 49;
z_count %= 2401;
c_grid[rows - 1][0] = z_count / 49;
c_grid[rows - 1][1] = z_count % 49;
}
local_value = (c_grid[rows - 1][0] * 49) + c_grid[rows - 1][1];
@ -297,15 +299,17 @@ INTERNAL int code49(struct zint_symbol *symbol, unsigned char source[], int leng
posn_val++;
/* Add Y Symbol Check */
c_grid[rows - 1][2] = (y_count % 2401) / 49;
c_grid[rows - 1][3] = (y_count % 2401) % 49;
y_count %= 2401;
c_grid[rows - 1][2] = y_count / 49;
c_grid[rows - 1][3] = y_count % 49;
local_value = (c_grid[rows - 1][2] * 49) + c_grid[rows - 1][3];
x_count += c49_x_weight[posn_val] * local_value;
/* Add X Symbol Check */
c_grid[rows - 1][4] = (x_count % 2401) / 49;
c_grid[rows - 1][5] = (x_count % 2401) % 49;
x_count %= 2401;
c_grid[rows - 1][4] = x_count / 49;
c_grid[rows - 1][5] = x_count % 49;
/* Add last row check character */
j = 0;