/* auspost.c - Handles Australia Post 4-State Barcode */ /* libzint - the open source barcode library Copyright (C) 2008 Robin Stuart */ #define GDSET "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz #" static const char *AusNTable[10] = {"00", "01", "02", "10", "11", "12", "20", "21", "22", "30"}; static const char *AusCTable[64] = {"222", "300", "301", "302", "310", "311", "312", "320", "321", "322", "000", "001", "002", "010", "011", "012", "020", "021", "022", "100", "101", "102", "110", "111", "112", "120", "121", "122", "200", "201", "202", "210", "211", "212", "220", "221", "023", "030", "031", "032", "033", "103", "113", "123", "130", "131", "132", "133", "203", "213", "223", "230", "231", "232", "233", "303", "313", "323", "330", "331", "332", "333", "003", "013"}; static const char *AusBarTable[64] = {"000", "001", "002", "003", "010", "011", "012", "013", "020", "021", "022", "023", "030", "031", "032", "033", "100", "101", "102", "103", "110", "111", "112", "113", "120", "121", "122", "123", "130", "131", "132", "133", "200", "201", "202", "203", "210", "211", "212", "213", "220", "221", "222", "223", "230", "231", "232", "233", "300", "301", "302", "303", "310", "311", "312", "313", "320", "321", "322", "323", "330", "331", "332", "333"}; #include #include #include #include "common.h" #include "reedsol.h" static inline char convert_pattern(char data, int shift) { return (data - '0') << shift; } void rs_error(char data_pattern[]) { /* Adds Reed-Solomon error correction to auspost */ int reader, triple_writer = 0; char triple[31], inv_triple[31]; unsigned char result[5]; for(reader = 2; reader < strlen(data_pattern); reader += 3, triple_writer++) { triple[triple_writer] = convert_pattern(data_pattern[reader], 4) + convert_pattern(data_pattern[reader + 1], 2) + convert_pattern(data_pattern[reader + 2], 0); } for(reader = 0; reader < triple_writer; reader++) { inv_triple[reader] = triple[(triple_writer - 1) - reader]; } rs_init_gf(0x43); rs_init_code(4, 1); rs_encode(triple_writer, (unsigned char*) inv_triple, result); for(reader = 4; reader > 0; reader--) { concat(data_pattern, AusBarTable[(int)result[reader - 1]]); } rs_free(); } int australia_post(struct zint_symbol *symbol, unsigned char source[], int length) { /* Handles Australia Posts's 4 State Codes */ /* Customer Standard Barcode, Barcode 2 or Barcode 3 system determined automatically (i.e. the FCC doesn't need to be specified by the user) dependent on the length of the input string */ /* The contents of data_pattern conform to the following standard: 0 = Tracker, Ascender and Descender 1 = Tracker and Ascender 2 = Tracker and Descender 3 = Tracker only */ int error_number, zeroes; int writer; unsigned int loopey, reader, h; char data_pattern[200]; char fcc[3] = {0, 0}, dpid[10]; char localstr[30]; error_number = 0; strcpy(localstr, ""); /* Do all of the length checking first to avoid stack smashing */ if(symbol->symbology == BARCODE_AUSPOST) { /* Format control code (FCC) */ switch(length) { case 8: strcpy(fcc, "11"); break; case 13: strcpy(fcc, "59"); break; case 16: strcpy(fcc, "59"); error_number = is_sane(NEON, source, length); break; case 18: strcpy(fcc, "62"); break; case 23: strcpy(fcc, "62"); error_number = is_sane(NEON, source, length); break; default: strcpy(symbol->errtxt, "Auspost input is wrong length"); return ERROR_TOO_LONG; break; } if(error_number == ERROR_INVALID_DATA) { strcpy(symbol->errtxt, "Invalid characters in data"); return error_number; } } else { if (length > 8) { strcpy(symbol->errtxt, "Auspost input is too long"); return ERROR_TOO_LONG; } switch(symbol->symbology) { case BARCODE_AUSREPLY: strcpy(fcc, "45"); break; case BARCODE_AUSROUTE: strcpy(fcc, "87"); break; case BARCODE_AUSREDIRECT: strcpy(fcc, "92"); break; } /* Add leading zeros as required */ zeroes = 8 - length; memset(localstr, '0', zeroes); localstr[8] = '\0'; } concat(localstr, (char*)source); h = strlen(localstr); error_number = is_sane(GDSET, (unsigned char *)localstr, h); if(error_number == ERROR_INVALID_DATA) { strcpy(symbol->errtxt, "Invalid characters in data"); return error_number; } /* Verifiy that the first 8 characters are numbers */ memcpy(dpid, localstr, 8); dpid[8] = '\0'; error_number = is_sane(NEON, (unsigned char *)dpid, strlen(dpid)); if(error_number == ERROR_INVALID_DATA) { strcpy(symbol->errtxt, "Invalid characters in DPID"); return error_number; } /* Start character */ strcpy(data_pattern, "13"); /* Encode the FCC */ for(reader = 0; reader < 2; reader++) { lookup(NEON, AusNTable, fcc[reader], data_pattern); } /* printf("AUSPOST FCC: %s ", fcc); */ /* Delivery Point Identifier (DPID) */ for(reader = 0; reader < 8; reader++) { lookup(NEON, AusNTable, dpid[reader], data_pattern); } /* Customer Information */ if(h > 8) { if((h == 13) || (h == 18)) { for(reader = 8; reader < h; reader++) { lookup(GDSET, AusCTable, localstr[reader], data_pattern); } } else if((h == 16) || (h == 23)) { for(reader = 8; reader < h; reader++) { lookup(NEON, AusNTable, localstr[reader], data_pattern); } } } /* Filler bar */ h = strlen(data_pattern); switch (h) { case 22: case 37: case 52: concat(data_pattern, "3"); break; default: break; } /* Reed Solomon error correction */ rs_error(data_pattern); /* Stop character */ concat(data_pattern, "13"); /* Turn the symbol into a bar pattern ready for plotting */ writer = 0; h = strlen(data_pattern); for(loopey = 0; loopey < h; loopey++) { if((data_pattern[loopey] == '1') || (data_pattern[loopey] == '0')) { set_module(symbol, 0, writer); } set_module(symbol, 1, writer); if((data_pattern[loopey] == '2') || (data_pattern[loopey] == '0')) { set_module(symbol, 2, writer); } writer += 2; } symbol->row_height[0] = 3; symbol->row_height[1] = 2; symbol->row_height[2] = 3; symbol->rows = 3; symbol->width = writer - 1; return error_number; }