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DATAMATRIX: re [e9b8ee] add dm_text_sp_cnt() & dm_switch_mode() to get around

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exiting B256 if have less than break-even sequence of TEXT chars;
  rename some vars to be more consistent
This commit is contained in:
gitlost 2021-11-16 18:37:51 +00:00
parent e9b8ee9c1b
commit 96cf5aa668
3 changed files with 128 additions and 76 deletions
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77
backend/tests/test_dmatrix_variant.h
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@ -66,15 +66,15 @@ static int dm_isedifact(const unsigned char input, const int gs1) {
return (input >= ' ' && input <= '^') && (!gs1 || input != '['); /* Can't encode GS1 FNC1/GS in EDIFACT */
}
static int dm_p_r_6_2_1(const unsigned char inputData[], const int position, const int sourcelen) {
static int dm_p_r_6_2_1(const unsigned char source[], const int length, const int sp) {
/* Annex P section (r)(6)(ii)(I)
"If one of the three X12 terminator/separator characters first
occurs in the yet to be processed data before a non-X12 character..."
*/
int i;
for (i = position; i < sourcelen && dm_isX12(inputData[i]); i++) {
if (inputData[i] == 13 || inputData[i] == '*' || inputData[i] == '>') {
for (i = sp; i < length && dm_isX12(source[i]); i++) {
if (source[i] == 13 || source[i] == '*' || source[i] == '>') {
return 1;
}
}
@ -82,6 +82,20 @@ static int dm_p_r_6_2_1(const unsigned char inputData[], const int position, con
return 0;
}
/* Count number of TEXT characters around `sp` between `position` and `length`
- helper to avoid exiting from Base 256 too early if have series of TEXT characters */
static int dm_text_sp_cnt(const unsigned char source[], const int position, const int length, const int sp) {
int i;
int cnt = 0;
/* Count from `sp` forward */
for (i = sp; i < length && dm_istext(source[i]); i++, cnt++);
/* Count backwards from `sp` */
for (i = sp - 1; i >= position && dm_istext(source[i]); i--, cnt++);
return cnt;
}
#define DM_MULT 12
#define DM_MULT_1_DIV_2 6
@ -103,7 +117,7 @@ static int dm_p_r_6_2_1(const unsigned char inputData[], const int position, con
#define DM_MULT_MINUS_1 11
#define DM_MULT_CEIL(n) ((((n) + DM_MULT_MINUS_1) / DM_MULT) * DM_MULT)
static int dm_look_ahead_test_variant(const unsigned char inputData[], const int sourcelen, const int position,
static int dm_look_ahead_test_variant(const unsigned char source[], const int length, const int position,
const int current_mode, const int mode_arg, const int gs1, const int debug_print, const int variant) {
int ascii_count, c40_count, text_count, x12_count, edf_count, b256_count;
int ascii_rnded, c40_rnded, text_rnded, x12_rnded, edf_rnded, b256_rnded;
@ -160,8 +174,8 @@ static int dm_look_ahead_test_variant(const unsigned char inputData[], const int
break;
}
for (sp = position; sp < sourcelen; sp++) {
unsigned char c = inputData[sp];
for (sp = position; sp < length; sp++) {
unsigned char c = source[sp];
int is_extended = c & 0x80;
/* ascii ... step (l) */
@ -271,8 +285,22 @@ static int dm_look_ahead_test_variant(const unsigned char inputData[], const int
cnt_1 = text_count + DM_MULT_1;
if (cnt_1 < ascii_count && cnt_1 < b256_count && cnt_1 < edf_count && cnt_1 < x12_count
&& cnt_1 < c40_count) {
if (debug_print) printf("TEX->");
return DM_TEXT; /* step (r)(4) */
if (variant == 1) {
if (current_mode == DM_BASE256 && position + 6 < length) {
int text_sp_cnt = dm_text_sp_cnt(source, position, length, sp);
if (debug_print) printf("text_sp_cnt %d\n", text_sp_cnt);
if (text_sp_cnt >= 12) {
if (debug_print) printf("TEX->");
return DM_TEXT; /* step (r)(4) */
}
} else {
if (debug_print) printf("TEX->");
return DM_TEXT; /* step (r)(4) */
}
} else {
if (debug_print) printf("TEX->");
return DM_TEXT; /* step (r)(4) */
}
}
cnt_1 = x12_count + DM_MULT_1;
if (cnt_1 < ascii_count && cnt_1 < b256_count && cnt_1 < edf_count && cnt_1 < text_count
@ -287,7 +315,7 @@ static int dm_look_ahead_test_variant(const unsigned char inputData[], const int
return DM_C40; /* step (r)(6)(i) */
}
if (c40_count == x12_count) {
if (dm_p_r_6_2_1(inputData, sp, sourcelen) == 1) {
if (dm_p_r_6_2_1(source, length, sp) == 1) {
if (debug_print) printf("X12->");
return DM_X12; /* step (r)(6)(ii)(I) */
}
@ -438,6 +466,8 @@ STATIC_UNLESS_ZINT_TEST int dm_get_symbolsize(struct zint_symbol *symbol, const
STATIC_UNLESS_ZINT_TEST int dm_codewords_remaining(struct zint_symbol *symbol, const int tp, const int process_p);
STATIC_UNLESS_ZINT_TEST int dm_c40text_cnt(const int current_mode, const int gs1, unsigned char input);
STATIC_UNLESS_ZINT_TEST int dm_update_b256_field_length(unsigned char target[], int tp, int b256_start);
STATIC_UNLESS_ZINT_TEST int dm_switch_mode(const int next_mode, unsigned char target[], int tp, int *b256_start,
const int debug_print);
/* Version of dm200encode() to check variant look ahead parameters */
static int dm200encode_variant(struct zint_symbol *symbol, const unsigned char source[], unsigned char target[],
@ -602,25 +632,7 @@ static int dm200encode_variant(struct zint_symbol *symbol, const unsigned char s
next_mode = dm_look_ahead_test_variant(source, inputlen, sp, current_mode, 0, gs1, debug_print, variant);
if (next_mode != DM_ASCII) {
switch (next_mode) {
case DM_C40: target[tp++] = 230;
if (debug_print) printf("C40 ");
break;
case DM_TEXT: target[tp++] = 239;
if (debug_print) printf("TEX ");
break;
case DM_X12: target[tp++] = 238;
if (debug_print) printf("X12 ");
break;
case DM_EDIFACT: target[tp++] = 240;
if (debug_print) printf("EDI ");
break;
case DM_BASE256: target[tp++] = 231;
b256_start = tp;
target[tp++] = 0; /* Byte count holder (may be expanded to 2 codewords) */
if (debug_print) printf("BAS ");
break;
}
tp = dm_switch_mode(next_mode, target, tp, &b256_start, debug_print);
not_first = 0;
} else {
if (source[sp] & 0x80) {
@ -794,8 +806,13 @@ static int dm200encode_variant(struct zint_symbol *symbol, const unsigned char s
const int prn = ((149 * (i + 1)) % 255) + 1;
target[i] = (unsigned char) ((target[i] + prn) & 0xFF);
}
next_mode = DM_ASCII;
if (debug_print) printf("ASC ");
if (variant == 1) {
tp = dm_switch_mode(next_mode, target, tp, &b256_start, debug_print);
not_first = 0;
} else {
next_mode = DM_ASCII;
if (debug_print) printf("ASC ");
}
} else {
if (gs1 == 2 && source[sp] == '[') {
target[tp++] = 29; /* GS */