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Allow selection of GS1 mode on GS1 symbols

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Because some symbols require GS1 data, selecting GS1 mode for them would result in GS1 parsing being done twice, corrupting the data.
Fixes #165 reported by Gregory Van Vooren
This commit is contained in:
Robin Stuart 2019-10-06 11:30:21 +01:00
parent eb3a004ace
commit ff2ceea361
4 changed files with 45 additions and 64 deletions
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48
backend/code128.c
View File

@ -2,7 +2,7 @@
/*
libzint - the open source barcode library
Copyright (C) 2008-2017 Robin Stuart <rstuart114@gmail.com>
Copyright (C) 2008-2019 Robin Stuart <rstuart114@gmail.com>
Bugfixes thanks to Christian Sakowski and BogDan Vatra
Redistribution and use in source and binary forms, with or without
@ -689,11 +689,7 @@ int ean_128(struct zint_symbol *symbol, unsigned char source[], const size_t len
float glyph_count;
char dest[1000];
int separator_row, linkage_flag, c_count;
#ifndef _MSC_VER
char reduced[length + 1];
#else
char* reduced = (char*) _alloca(length + 1);
#endif
error_number = 0;
strcpy(dest, "");
linkage_flag = 0;
@ -726,20 +722,12 @@ int ean_128(struct zint_symbol *symbol, unsigned char source[], const size_t len
symbol->rows += 1;
}
if (symbol->input_mode != GS1_MODE) {
/* GS1 data has not been checked yet */
error_number = gs1_verify(symbol, source, length, reduced);
if (error_number != 0) {
return error_number;
}
}
/* Decide on mode using same system as PDF417 and rules of ISO 15417 Annex E */
indexliste = 0;
indexchaine = 0;
mode = parunmodd(reduced[indexchaine]);
if (reduced[indexchaine] == '[') {
mode = parunmodd(source[indexchaine]);
if (source[indexchaine] == '[') {
mode = ABORC;
}
@ -749,16 +737,16 @@ int ean_128(struct zint_symbol *symbol, unsigned char source[], const size_t len
do {
list[1][indexliste] = mode;
while ((list[1][indexliste] == mode) && (indexchaine < (int) strlen(reduced))) {
while ((list[1][indexliste] == mode) && (indexchaine < (int) ustrlen(source))) {
list[0][indexliste]++;
indexchaine++;
mode = parunmodd(reduced[indexchaine]);
if (reduced[indexchaine] == '[') {
mode = parunmodd(source[indexchaine]);
if (source[indexchaine] == '[') {
mode = ABORC;
}
}
indexliste++;
} while (indexchaine < (int) strlen(reduced));
} while (indexchaine < (int) ustrlen(source));
dxsmooth(&indexliste);
@ -786,7 +774,7 @@ int ean_128(struct zint_symbol *symbol, unsigned char source[], const size_t len
c_count = 0;
for (i = 0; i < read; i++) {
if (set[i] == 'C') {
if (reduced[i] == '[') {
if (source[i] == '[') {
if (c_count & 1) {
if ((i - c_count) != 0) {
set[i - c_count] = 'B';
@ -826,7 +814,7 @@ int ean_128(struct zint_symbol *symbol, unsigned char source[], const size_t len
being too long */
last_set = ' ';
glyph_count = 0.0;
for (i = 0; i < (int) strlen(reduced); i++) {
for (i = 0; i < (int) ustrlen(source); i++) {
if ((set[i] == 'a') || (set[i] == 'b')) {
glyph_count = glyph_count + 1.0;
}
@ -837,7 +825,7 @@ int ean_128(struct zint_symbol *symbol, unsigned char source[], const size_t len
}
}
if ((set[i] == 'C') && (reduced[i] != '[')) {
if ((set[i] == 'C') && (source[i] != '[')) {
glyph_count = glyph_count + 0.5;
} else {
glyph_count = glyph_count + 1.0;
@ -897,20 +885,20 @@ int ean_128(struct zint_symbol *symbol, unsigned char source[], const size_t len
bar_characters++;
}
if (reduced[read] != '[') {
if (source[read] != '[') {
switch (set[read]) { /* Encode data characters */
case 'A':
case 'a':
c128_set_a(reduced[read], dest, values, &bar_characters);
c128_set_a(source[read], dest, values, &bar_characters);
read++;
break;
case 'B':
case 'b':
c128_set_b(reduced[read], dest, values, &bar_characters);
c128_set_b(source[read], dest, values, &bar_characters);
read++;
break;
case 'C':
c128_set_c(reduced[read], reduced[read + 1], dest, values, &bar_characters);
c128_set_c(source[read], source[read + 1], dest, values, &bar_characters);
read += 2;
break;
}
@ -920,7 +908,7 @@ int ean_128(struct zint_symbol *symbol, unsigned char source[], const size_t len
bar_characters++;
read++;
}
} while (read < (int) strlen(reduced));
} while (read < (int) ustrlen(source));
/* "...note that the linkage flag is an extra code set character between
the last data character and the Symbol Check Character" (GS1 Specification) */
@ -931,7 +919,7 @@ int ean_128(struct zint_symbol *symbol, unsigned char source[], const size_t len
case 1:
case 2:
/* CC-A or CC-B 2D component */
switch (set[strlen(reduced) - 1]) {
switch (set[ustrlen(source) - 1]) {
case 'A': linkage_flag = 100;
break;
case 'B': linkage_flag = 99;
@ -942,7 +930,7 @@ int ean_128(struct zint_symbol *symbol, unsigned char source[], const size_t len
break;
case 3:
/* CC-C 2D component */
switch (set[strlen(reduced) - 1]) {
switch (set[ustrlen(source) - 1]) {
case 'A': linkage_flag = 99;
break;
case 'B': linkage_flag = 101;

15
backend/composite.c
View File

@ -2,7 +2,7 @@
/*
libzint - the open source barcode library
Copyright (C) 2008-2017 Robin Stuart <rstuart114@gmail.com>
Copyright (C) 2008-2019 Robin Stuart <rstuart114@gmail.com>
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
@ -1618,10 +1618,8 @@ int composite(struct zint_symbol *symbol, unsigned char source[], int length) {
unsigned int bs = 20 * rs;
unsigned int pri_len;
#ifndef _MSC_VER
char reduced[rs];
char binary_string[bs];
#else
char* reduced = (char*) _alloca(rs);
char* binary_string = (char*) _alloca(bs);
#endif
struct zint_symbol *linear;
@ -1648,11 +1646,6 @@ int composite(struct zint_symbol *symbol, unsigned char source[], int length) {
return ZINT_ERROR_INVALID_OPTION;
}
error_number = gs1_verify(symbol, source, length, reduced);
if (error_number != 0) {
return error_number;
}
if (symbol->symbology == BARCODE_EAN128_CC) {
/* Do a test run of encoding the linear component to establish its width */
linear_width = linear_dummy_run((unsigned char *) symbol->primary, pri_len);
@ -1705,7 +1698,7 @@ int composite(struct zint_symbol *symbol, unsigned char source[], int length) {
}
if (cc_mode == 1) {
i = cc_binary_string(symbol, reduced, binary_string, cc_mode, &cc_width, &ecc_level, linear_width);
i = cc_binary_string(symbol, (char *) source, binary_string, cc_mode, &cc_width, &ecc_level, linear_width);
if (i == ZINT_ERROR_TOO_LONG) {
cc_mode = 2;
}
@ -1713,7 +1706,7 @@ int composite(struct zint_symbol *symbol, unsigned char source[], int length) {
if (cc_mode == 2) {
/* If the data didn't fit into CC-A it is recalculated for CC-B */
i = cc_binary_string(symbol, reduced, binary_string, cc_mode, &cc_width, &ecc_level, linear_width);
i = cc_binary_string(symbol, (char *) source, binary_string, cc_mode, &cc_width, &ecc_level, linear_width);
if (i == ZINT_ERROR_TOO_LONG) {
if (symbol->symbology != BARCODE_EAN128_CC) {
return ZINT_ERROR_TOO_LONG;
@ -1725,7 +1718,7 @@ int composite(struct zint_symbol *symbol, unsigned char source[], int length) {
if (cc_mode == 3) {
/* If the data didn't fit in CC-B (and linear part is GS1-128) it is recalculated for CC-C */
i = cc_binary_string(symbol, reduced, binary_string, cc_mode, &cc_width, &ecc_level, linear_width);
i = cc_binary_string(symbol, (char *) source, binary_string, cc_mode, &cc_width, &ecc_level, linear_width);
if (i == ZINT_ERROR_TOO_LONG) {
return ZINT_ERROR_TOO_LONG;
}

31
backend/library.c
View File

@ -1,7 +1,7 @@
/* library.c - external functions of libzint
libzint - the open source barcode library
Copyright (C) 2009-2018 Robin Stuart <rstuart114@gmail.com>
Copyright (C) 2009-2019 Robin Stuart <rstuart114@gmail.com>
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
@ -184,11 +184,7 @@ extern int ultracode(struct zint_symbol *symbol, const unsigned char source[], c
extern int plot_raster(struct zint_symbol *symbol, int rotate_angle, int file_type); /* Plot to PNG/BMP/PCX */
extern int plot_vector(struct zint_symbol *symbol, int rotate_angle, int file_type); /* Plot to EPS/EMF/SVG */
extern int render_plot(struct zint_symbol *symbol, float width, float height); /* Plot to gLabels */
//extern int ps_plot(struct zint_symbol *symbol); /* Plot to EPS */
//extern int svg_plot(struct zint_symbol *symbol); /* Plot to SVG */
//extern int emf_plot(struct zint_symbol *symbol); /* Plot to Metafile */
extern int render_plot(struct zint_symbol *symbol, float width, float height); /* Plot to gLabels - depreciated */
void error_tag(char error_string[], int error_number) {
@ -386,11 +382,11 @@ static void check_row_heights(struct zint_symbol *symbol) {
}
}
static int gs1_compliant(const int symbology) {
/* Returns 1 if symbology supports GS1 data */
static int check_force_gs1(const int symbology) {
/* Returns 1 if symbology MUST have GS1 data */
int result = 0;
switch (symbology) {
case BARCODE_EAN128:
case BARCODE_RSS_EXP:
@ -405,6 +401,19 @@ static int gs1_compliant(const int symbology) {
case BARCODE_RSS14STACK_CC:
case BARCODE_RSS14_OMNI_CC:
case BARCODE_RSS_EXPSTACK_CC:
result = 1;
break;
}
return result;
}
static int gs1_compliant(const int symbology) {
/* Returns 1 if symbology supports GS1 data */
int result = check_force_gs1(symbology);
switch (symbology) {
case BARCODE_CODE16K:
case BARCODE_AZTEC:
case BARCODE_DATAMATRIX:
@ -1146,7 +1155,7 @@ int ZBarcode_Encode(struct zint_symbol *symbol, const unsigned char *source, int
}
/* Start acting on input mode */
if (input_mode == GS1_MODE) {
if ((input_mode == GS1_MODE) || (check_force_gs1(symbol->symbology))) {
for (i = 0; i < in_length; i++) {
if (source[i] == '\0') {
strcpy(symbol->errtxt, "219: NULL characters not permitted in GS1 mode");

15
backend/rss.c
View File

@ -2,7 +2,7 @@
/*
libzint - the open source barcode library
Copyright (C) 2008-2017 Robin Stuart <rstuart114@gmail.com>
Copyright (C) 2008-2019 Robin Stuart <rstuart114@gmail.com>
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
@ -1865,23 +1865,14 @@ int rssexpanded(struct zint_symbol *symbol, unsigned char source[], int src_len)
int check_char, c_odd, c_even, elements[235], pattern_width, reader, writer;
int separator_row;
#ifndef _MSC_VER
char reduced[src_len + 1], binary_string[(7 * src_len) + 1];
char binary_string[(7 * src_len) + 1];
#else
char* reduced = (char*) _alloca(src_len + 1);
char* binary_string = (char*) _alloca((7 * src_len) + 1);
#endif
separator_row = 0;
reader = 0;
if (symbol->input_mode != GS1_MODE) {
/* GS1 data has not been verified yet */
i = gs1_verify(symbol, source, src_len, reduced);
if (i != 0) {
return i;
}
}
if ((symbol->symbology == BARCODE_RSS_EXP_CC) || (symbol->symbology == BARCODE_RSS_EXPSTACK_CC)) {
/* make space for a composite separator pattern */
separator_row = symbol->rows;
@ -1897,7 +1888,7 @@ int rssexpanded(struct zint_symbol *symbol, unsigned char source[], int src_len)
strcat(binary_string, "0");
}
i = rss_binary_string(symbol, reduced, binary_string);
i = rss_binary_string(symbol, (char *) source, binary_string);
if (i != 0) {
return i;
}