zint/backend/library.c

/*  library.c - external functions of libzint

    libzint - the open source barcode library
    Copyright (C) 2009 Robin Stuart <robin@zint.org.uk>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#ifdef _MSC_VER
#include <malloc.h> 
#endif
#include "common.h"
#include "gs1.h"

#define TECHNETIUM	"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. $/+%"

struct zint_symbol *ZBarcode_Create()
{
	struct zint_symbol *symbol;
	int i, j;
	
	symbol = (struct zint_symbol*)malloc(sizeof(*symbol));
	if (!symbol) return NULL;

	memset(symbol, 0, sizeof(*symbol));
	symbol->symbology = BARCODE_CODE128;
	symbol->height = 0;
	symbol->whitespace_width = 0;
	symbol->border_width = 0;
	symbol->output_options = 0;
	symbol->rows = 0;
	symbol->width = 0;
	strcpy(symbol->fgcolour, "000000");
	strcpy(symbol->bgcolour, "ffffff");
	strcpy(symbol->outfile, "out.png");
	symbol->scale = 1.0;
	symbol->option_1 = -1;
	symbol->option_2 = 0;
	symbol->option_3 = 928; // PDF_MAX
	symbol->show_hrt = 1; // Show human readable text
	symbol->input_mode = DATA_MODE;
	strcpy(symbol->primary, "");
	for(i = 0; i < 178; i++) {
		for(j = 0; j < 1000; j++) {
			unset_module(symbol, i, j);
		}
		symbol->row_height[i] = 0;
	}
	symbol->bitmap = NULL;
	symbol->bitmap_width = 0;
	symbol->bitmap_height = 0;
	return symbol;
}

void ZBarcode_Clear(struct zint_symbol *symbol)
{
	int i, j;
	
	for(i = 0; i < symbol->rows; i++) {
		for(j = 0; j < symbol->width; j++) {
			unset_module(symbol, i, j);
		}
	}
	symbol->rows = 0;
	symbol->width = 0;
	symbol->text[0] = '\0';
	symbol->errtxt[0] = '\0';
	if (symbol->bitmap != NULL)
		free(symbol->bitmap);
	symbol->bitmap = NULL;
	symbol->bitmap_width = 0;
	symbol->bitmap_height = 0;
}

void ZBarcode_Delete(struct zint_symbol *symbol)
{
	if (symbol->bitmap != NULL)
		free(symbol->bitmap);

	// If there is a rendered version, ensure it's memory is released
	if (symbol->rendered != NULL) {
		struct zint_render_line *line, *l;
		struct zint_render_string *string, *s;

		// Free lines
		line = symbol->rendered->lines;
		while(line) {
			l = line;
			line = line->next;
			free(l);
		}
		// Free Strings
		string = symbol->rendered->strings;
		while (string) {
			s = string;
			string = string->next;
      free(s->text);
			free(s);
		}

		// Free Render
		free(symbol->rendered);
	}
	free(symbol);
}

extern int eanx(struct zint_symbol *symbol, unsigned char source[], int length); /* EAN system barcodes */
extern int c39(struct zint_symbol *symbol, unsigned char source[], int length); /* Code 3 from 9 (or Code 39) */
extern int pharmazentral(struct zint_symbol *symbol, unsigned char source[], int length); /* Pharmazentral Nummer (PZN) */
extern int ec39(struct zint_symbol *symbol, unsigned char source[], int length); /* Extended Code 3 from 9 (or Code 39+) */
extern int codabar(struct zint_symbol *symbol, unsigned char source[], int length); /* Codabar - a simple substitution cipher */
extern int matrix_two_of_five(struct zint_symbol *symbol, unsigned char source[], int length); /* Code 2 of 5 Standard (& Matrix) */
extern int industrial_two_of_five(struct zint_symbol *symbol, unsigned char source[], int length); /* Code 2 of 5 Industrial */
extern int iata_two_of_five(struct zint_symbol *symbol, unsigned char source[], int length); /* Code 2 of 5 IATA */
extern int interleaved_two_of_five(struct zint_symbol *symbol, unsigned char source[], int length); /* Code 2 of 5 Interleaved */
extern int logic_two_of_five(struct zint_symbol *symbol, unsigned char source[], int length); /* Code 2 of 5 Data Logic */
extern int itf14(struct zint_symbol *symbol, unsigned char source[], int length); /* ITF-14 */
extern int dpleit(struct zint_symbol *symbol, unsigned char source[], int length); /* Deutsche Post Leitcode */
extern int dpident(struct zint_symbol *symbol, unsigned char source[], int length); /* Deutsche Post Identcode */
extern int c93(struct zint_symbol *symbol, unsigned char source[], int length); /* Code 93 - a re-working of Code 39+, generates 2 check digits */
extern int code_128(struct zint_symbol *symbol, unsigned char source[], int length); /* Code 128 and NVE-18 */
extern int ean_128(struct zint_symbol *symbol, unsigned char source[], int length); /* EAN-128 (GS1-128) */
extern int code_11(struct zint_symbol *symbol, unsigned char source[], int length); /* Code 11 */
extern int msi_handle(struct zint_symbol *symbol, unsigned char source[], int length); /* MSI Plessey */
extern int telepen(struct zint_symbol *symbol, unsigned char source[], int length); /* Telepen ASCII */
extern int telepen_num(struct zint_symbol *symbol, unsigned char source[], int length); /* Telepen Numeric */
extern int plessey(struct zint_symbol *symbol, unsigned char source[], int length); /* Plessey Code */
extern int pharma_one(struct zint_symbol *symbol, unsigned char source[], int length); /* Pharmacode One Track */
extern int flattermarken(struct zint_symbol *symbol, unsigned char source[], int length); /* Flattermarken */
extern int fim(struct zint_symbol *symbol, unsigned char source[], int length); /* Facing Identification Mark */
extern int pharma_two(struct zint_symbol *symbol, unsigned char source[], int length); /* Pharmacode Two Track */
extern int post_plot(struct zint_symbol *symbol, unsigned char source[], int length); /* Postnet */
extern int planet_plot(struct zint_symbol *symbol, unsigned char source[], int length); /* PLANET */
extern int imail(struct zint_symbol *symbol, unsigned char source[], int length); /* Intelligent Mail (aka USPS OneCode) */
extern int royal_plot(struct zint_symbol *symbol, unsigned char source[], int length); /* RM4SCC */
extern int australia_post(struct zint_symbol *symbol, unsigned char source[], int length); /* Australia Post 4-state */
extern int code16k(struct zint_symbol *symbol, unsigned char source[], int length); /* Code 16k */
extern int pdf417enc(struct zint_symbol *symbol, unsigned char source[], int length); /* PDF417 */
extern int dmatrix(struct zint_symbol *symbol, unsigned char source[], int length); /* Data Matrix (IEC16022) */
extern int qr_code(struct zint_symbol *symbol, unsigned char source[], int length); /* QR Code */
extern int micro_pdf417(struct zint_symbol *symbol, unsigned char chaine[], int length); /* Micro PDF417 */
extern int maxicode(struct zint_symbol *symbol, unsigned char source[], int length); /* Maxicode */
extern int rss14(struct zint_symbol *symbol, unsigned char source[], int length); /* RSS-14 */
extern int rsslimited(struct zint_symbol *symbol, unsigned char source[], int length); /* RSS Limited */
extern int rssexpanded(struct zint_symbol *symbol, unsigned char source[], int length); /* RSS Expanded */
extern int composite(struct zint_symbol *symbol, unsigned char source[], int length); /* Composite Symbology */
extern int kix_code(struct zint_symbol *symbol, unsigned char source[], int length); /* TNT KIX Code */
extern int aztec(struct zint_symbol *symbol, unsigned char source[], int length); /* Aztec Code */
extern int code32(struct zint_symbol *symbol, unsigned char source[], int length); /* Italian Pharmacode */
extern int daft_code(struct zint_symbol *symbol, unsigned char source[], int length); /* DAFT Code */
extern int ean_14(struct zint_symbol *symbol, unsigned char source[], int length); /* EAN-14 */
extern int nve_18(struct zint_symbol *symbol, unsigned char source[], int length); /* NVE-18 */
extern int microqr(struct zint_symbol *symbol, unsigned char source[], int length); /* Micro QR Code */
extern int aztec_runes(struct zint_symbol *symbol, unsigned char source[], int length); /* Aztec Runes */
extern int korea_post(struct zint_symbol *symbol, unsigned char source[], int length); /* Korea Post */
extern int japan_post(struct zint_symbol *symbol, unsigned char source[], int length); /* Japanese Post */
extern int code_49(struct zint_symbol *symbol, unsigned char source[], int length); /* Code 49 */
extern int channel_code(struct zint_symbol *symbol, unsigned char source[], int length); /* Channel Code */
extern int code_one(struct zint_symbol *symbol, unsigned char source[], int length); /* Code One */
extern int grid_matrix(struct zint_symbol *symbol, unsigned char source[], int length); /* Grid Matrix */

#ifndef NO_PNG
extern int png_handle(struct zint_symbol *symbol, int rotate_angle);
#endif

extern int render_plot(struct zint_symbol *symbol, float width, float height);

extern int bmp_handle(struct zint_symbol *symbol, int rotate_angle);
extern int ps_plot(struct zint_symbol *symbol);
extern int svg_plot(struct zint_symbol *symbol);

void error_tag(char error_string[], int error_number)
{
	char error_buffer[100];
	
	if(error_number != 0) {
		strcpy(error_buffer, error_string);
		
		if(error_number > 4) {
			strcpy(error_string, "error: ");
		} else {
			strcpy(error_string, "warning: ");
		}
		
		concat(error_string, error_buffer);
	}
}

int hibc(struct zint_symbol *symbol, unsigned char source[], int length)
{
	int counter, error_number, i;
	char to_process[40], temp[2], check_digit;
	
	if(length > 36) {
		strcpy(symbol->errtxt, "Data too long for HIBC LIC");
		return ERROR_TOO_LONG;
	}
	to_upper(source);
	error_number = is_sane(TECHNETIUM , source, length);
	if(error_number == ERROR_INVALID_DATA) {
		strcpy(symbol->errtxt, "Invalid characters in data");
		return error_number;
	}
	
	strcpy(to_process, "+");
	counter = 41;
	for(i = 0; i < length; i++) {
		counter += posn(TECHNETIUM, source[i]);
	}
	counter = counter % 43;
	
	if(counter < 10) {
		check_digit = itoc(counter);
	} else {
		if(counter < 36) {
			check_digit = (counter - 10) + 'A';
		} else {
			switch(counter) {
				case 36: check_digit = '-'; break;
				case 37: check_digit = '.'; break;
				case 38: check_digit = ' '; break;
				case 39: check_digit = '$'; break;
				case 40: check_digit = '/'; break;
				case 41: check_digit = '+'; break;
				case 42: check_digit = '%'; break;
				default: check_digit = ' '; break; /* Keep compiler happy */
			}
		}
	}
	
	temp[0] = check_digit;
	temp[1] = '\0';
	
	concat(to_process, (char *)source);
	concat(to_process, temp);
	length = strlen(to_process);
	
	switch(symbol->symbology) {
		case BARCODE_HIBC_128:
			error_number = code_128(symbol, (unsigned char *)to_process, length);
			ustrcpy(symbol->text, (unsigned char*)"*");
			uconcat(symbol->text, (unsigned char*)to_process);
			uconcat(symbol->text, (unsigned char*)"*");
			break;
		case BARCODE_HIBC_39:
			symbol->option_2 = 0;
			error_number = c39(symbol, (unsigned char *)to_process, length);
			ustrcpy(symbol->text, (unsigned char*)"*");
			uconcat(symbol->text, (unsigned char*)to_process);
			uconcat(symbol->text, (unsigned char*)"*");
			break;
		case BARCODE_HIBC_DM:
			error_number = dmatrix(symbol, (unsigned char *)to_process, length);
			break;
		case BARCODE_HIBC_QR:
			error_number = qr_code(symbol, (unsigned char *)to_process, length);
			break;
		case BARCODE_HIBC_PDF:
			error_number = pdf417enc(symbol, (unsigned char *)to_process, length);
			break;
		case BARCODE_HIBC_MICPDF:
			error_number = micro_pdf417(symbol, (unsigned char *)to_process, length);
			break;
		case BARCODE_HIBC_AZTEC:
			error_number = aztec(symbol, (unsigned char *)to_process, length);
			break;
	}
	
	return error_number;
}

int gs1_compliant(int symbology)
{
	/* Returns 1 if symbology supports GS1 data */
	
	int result = 0;
	
	switch(symbology) {
		case BARCODE_EAN128:
		case BARCODE_RSS_EXP:
		case BARCODE_RSS_EXPSTACK:
		case BARCODE_EANX_CC:
		case BARCODE_EAN128_CC:
		case BARCODE_RSS14_CC:
		case BARCODE_RSS_LTD_CC:
		case BARCODE_RSS_EXP_CC:
		case BARCODE_UPCA_CC:
		case BARCODE_UPCE_CC:
		case BARCODE_RSS14STACK_CC:
		case BARCODE_RSS14_OMNI_CC:
		case BARCODE_RSS_EXPSTACK_CC:
		case BARCODE_CODE16K:
		case BARCODE_AZTEC:
		case BARCODE_DATAMATRIX:
		case BARCODE_CODEONE:
		case BARCODE_CODE49:
		case BARCODE_QRCODE:
			result = 1;
			break;
	}
	
	return result;
}

int ZBarcode_ValidID(int symbol_id)
{
	/* Checks whether a symbology is supported */
	
	int result = 0;

	switch(symbol_id) {
		case BARCODE_CODE11:
		case BARCODE_C25MATRIX:
		case BARCODE_C25INTER:
		case BARCODE_C25IATA:
		case BARCODE_C25LOGIC:
		case BARCODE_C25IND:
		case BARCODE_CODE39:
		case BARCODE_EXCODE39:
		case BARCODE_EANX:
		case BARCODE_EAN128:
		case BARCODE_CODABAR:
		case BARCODE_CODE128:
		case BARCODE_DPLEIT:
		case BARCODE_DPIDENT:
		case BARCODE_CODE16K:
		case BARCODE_CODE49:
		case BARCODE_CODE93:
		case BARCODE_FLAT:
		case BARCODE_RSS14:
		case BARCODE_RSS_LTD:
		case BARCODE_RSS_EXP:
		case BARCODE_TELEPEN:
		case BARCODE_UPCA:
		case BARCODE_UPCE:
		case BARCODE_POSTNET:
		case BARCODE_MSI_PLESSEY:
		case BARCODE_FIM:
		case BARCODE_LOGMARS:
		case BARCODE_PHARMA:
		case BARCODE_PZN:
		case BARCODE_PHARMA_TWO:
		case BARCODE_PDF417:
		case BARCODE_PDF417TRUNC:
		case BARCODE_MAXICODE:
		case BARCODE_QRCODE:
		case BARCODE_CODE128B:
		case BARCODE_AUSPOST:
		case BARCODE_AUSREPLY:
		case BARCODE_AUSROUTE:
		case BARCODE_AUSREDIRECT:
		case BARCODE_ISBNX:
		case BARCODE_RM4SCC:
		case BARCODE_DATAMATRIX:
		case BARCODE_EAN14:
		case BARCODE_NVE18:
		case BARCODE_JAPANPOST:
		case BARCODE_KOREAPOST:
		case BARCODE_RSS14STACK:
		case BARCODE_RSS14STACK_OMNI:
		case BARCODE_RSS_EXPSTACK:
		case BARCODE_PLANET:
		case BARCODE_MICROPDF417:
		case BARCODE_ONECODE:
		case BARCODE_PLESSEY:
		case BARCODE_TELEPEN_NUM:
		case BARCODE_ITF14:
		case BARCODE_KIX:
		case BARCODE_AZTEC:
		case BARCODE_DAFT:
		case BARCODE_MICROQR:
		case BARCODE_HIBC_128:
		case BARCODE_HIBC_39:
		case BARCODE_HIBC_DM:
		case BARCODE_HIBC_QR:
		case BARCODE_HIBC_PDF:
		case BARCODE_HIBC_MICPDF:
		case BARCODE_HIBC_AZTEC:
		case BARCODE_AZRUNE:
		case BARCODE_CODE32:
		case BARCODE_EANX_CC:
		case BARCODE_EAN128_CC:
		case BARCODE_RSS14_CC:
		case BARCODE_RSS_LTD_CC:
		case BARCODE_RSS_EXP_CC:
		case BARCODE_UPCA_CC:
		case BARCODE_UPCE_CC:
		case BARCODE_RSS14STACK_CC:
		case BARCODE_RSS14_OMNI_CC:
		case BARCODE_RSS_EXPSTACK_CC:
		case BARCODE_CHANNEL:
		case BARCODE_CODEONE:
		case BARCODE_GRIDMATRIX:
			result = 1;
			break;
	}
	
	return result;
}

int extended_charset(struct zint_symbol *symbol, unsigned char *source, int length)
{
	int error_number = 0;
	
	/* These are the "elite" standards which can support multiple character sets */
	switch(symbol->symbology) {
		case BARCODE_QRCODE: error_number = qr_code(symbol, source, length); break;
		case BARCODE_MICROQR: error_number = microqr(symbol, source, length); break;
		case BARCODE_GRIDMATRIX: error_number = grid_matrix(symbol, source, length); break;
	}

	return error_number;
}

int reduced_charset(struct zint_symbol *symbol, unsigned char *source, int length)
{
	/* These are the "norm" standards which only support Latin-1 at most */
	int error_number = 0;
	
#ifndef _MSC_VER
	unsigned char preprocessed[length + 1];
#else
        unsigned char* preprocessed = (unsigned char*)_alloca(length + 1);
#endif
	
	if(symbol->symbology == BARCODE_CODE16K) {
		symbol->whitespace_width = 16;
		symbol->border_width = 2;
		symbol->output_options = BARCODE_BIND;
	}
	
	if(symbol->symbology == BARCODE_ITF14) {
		symbol->whitespace_width = 20;
		symbol->border_width = 8;
		symbol->output_options = BARCODE_BOX;
	}
	
	switch(symbol->input_mode) {
		case DATA_MODE:
		case GS1_MODE:
			memcpy(preprocessed, source, length);
			preprocessed[length] = '\0';
			break;
		case UNICODE_MODE:
			error_number = latin1_process(symbol, source, preprocessed, &length);
			if(error_number != 0) { return error_number; }
			break;
	}

	switch(symbol->symbology) {
		case BARCODE_C25MATRIX: error_number = matrix_two_of_five(symbol, preprocessed, length); break;
		case BARCODE_C25IND: error_number = industrial_two_of_five(symbol, preprocessed, length); break;
		case BARCODE_C25INTER: error_number = interleaved_two_of_five(symbol, preprocessed, length); break;
		case BARCODE_C25IATA: error_number = iata_two_of_five(symbol, preprocessed, length); break;
		case BARCODE_C25LOGIC: error_number = logic_two_of_five(symbol, preprocessed, length); break;
		case BARCODE_DPLEIT: error_number = dpleit(symbol, preprocessed, length); break;
		case BARCODE_DPIDENT: error_number = dpident(symbol, preprocessed, length); break;
		case BARCODE_UPCA: error_number = eanx(symbol, preprocessed, length); break;
		case BARCODE_UPCE: error_number = eanx(symbol, preprocessed, length); break;
		case BARCODE_EANX: error_number = eanx(symbol, preprocessed, length); break;
		case BARCODE_EAN128: error_number = ean_128(symbol, preprocessed, length); break;
		case BARCODE_CODE39: error_number = c39(symbol, preprocessed, length); break;
		case BARCODE_PZN: error_number = pharmazentral(symbol, preprocessed, length); break;
		case BARCODE_EXCODE39: error_number = ec39(symbol, preprocessed, length); break;
		case BARCODE_CODABAR: error_number = codabar(symbol, preprocessed, length); break;
		case BARCODE_CODE93: error_number = c93(symbol, preprocessed, length); break;
		case BARCODE_LOGMARS: error_number = c39(symbol, preprocessed, length); break;
		case BARCODE_CODE128: error_number = code_128(symbol, preprocessed, length); break;
		case BARCODE_CODE128B: error_number = code_128(symbol, preprocessed, length); break;
		case BARCODE_NVE18: error_number = nve_18(symbol, preprocessed, length); break;
		case BARCODE_CODE11: error_number = code_11(symbol, preprocessed, length); break;
		case BARCODE_MSI_PLESSEY: error_number = msi_handle(symbol, preprocessed, length); break;
		case BARCODE_TELEPEN: error_number = telepen(symbol, preprocessed, length); break;
		case BARCODE_TELEPEN_NUM: error_number = telepen_num(symbol, preprocessed, length); break;
		case BARCODE_PHARMA: error_number = pharma_one(symbol, preprocessed, length); break;
		case BARCODE_PLESSEY: error_number = plessey(symbol, preprocessed, length); break;
		case BARCODE_ITF14: error_number = itf14(symbol, preprocessed, length); break;
		case BARCODE_FLAT: error_number = flattermarken(symbol, preprocessed, length); break;
		case BARCODE_FIM: error_number = fim(symbol, preprocessed, length); break;
		case BARCODE_POSTNET: error_number = post_plot(symbol, preprocessed, length); break;
		case BARCODE_PLANET: error_number = planet_plot(symbol, preprocessed, length); break;
		case BARCODE_RM4SCC: error_number = royal_plot(symbol, preprocessed, length); break;
		case BARCODE_AUSPOST: error_number = australia_post(symbol, preprocessed, length); break;
		case BARCODE_AUSREPLY: error_number = australia_post(symbol, preprocessed, length); break;
		case BARCODE_AUSROUTE: error_number = australia_post(symbol, preprocessed, length); break;
		case BARCODE_AUSREDIRECT: error_number = australia_post(symbol, preprocessed, length); break;
		case BARCODE_CODE16K: error_number = code16k(symbol, preprocessed, length); break;
		case BARCODE_PHARMA_TWO: error_number = pharma_two(symbol, preprocessed, length); break;
		case BARCODE_ONECODE: error_number = imail(symbol, preprocessed, length); break;
		case BARCODE_ISBNX: error_number = eanx(symbol, preprocessed, length); break;
		case BARCODE_RSS14: error_number = rss14(symbol, preprocessed, length); break;
		case BARCODE_RSS14STACK: error_number = rss14(symbol, preprocessed, length); break;
		case BARCODE_RSS14STACK_OMNI: error_number = rss14(symbol, preprocessed, length); break;
		case BARCODE_RSS_LTD: error_number = rsslimited(symbol, preprocessed, length); break;
		case BARCODE_RSS_EXP: error_number = rssexpanded(symbol, preprocessed, length); break;
		case BARCODE_RSS_EXPSTACK: error_number = rssexpanded(symbol, preprocessed, length); break;
		case BARCODE_EANX_CC: error_number = composite(symbol, preprocessed, length); break;
		case BARCODE_EAN128_CC: error_number = composite(symbol, preprocessed, length); break;
		case BARCODE_RSS14_CC: error_number = composite(symbol, preprocessed, length); break;
		case BARCODE_RSS_LTD_CC: error_number = composite(symbol, preprocessed, length); break;
		case BARCODE_RSS_EXP_CC: error_number = composite(symbol, preprocessed, length); break;
		case BARCODE_UPCA_CC: error_number = composite(symbol, preprocessed, length); break;
		case BARCODE_UPCE_CC: error_number = composite(symbol, preprocessed, length); break;
		case BARCODE_RSS14STACK_CC: error_number = composite(symbol, preprocessed, length); break;
		case BARCODE_RSS14_OMNI_CC: error_number = composite(symbol, preprocessed, length); break;
		case BARCODE_RSS_EXPSTACK_CC: error_number = composite(symbol, preprocessed, length); break;
		case BARCODE_KIX: error_number = kix_code(symbol, preprocessed, length); break;
		case BARCODE_CODE32: error_number = code32(symbol, preprocessed, length); break;
		case BARCODE_DAFT: error_number = daft_code(symbol, preprocessed, length); break;
		case BARCODE_EAN14: error_number = ean_14(symbol, preprocessed, length); break;
		case BARCODE_AZRUNE: error_number = aztec_runes(symbol, preprocessed, length); break;
		case BARCODE_KOREAPOST: error_number = korea_post(symbol, preprocessed, length); break;
		case BARCODE_HIBC_128: error_number = hibc(symbol, preprocessed, length); break;
		case BARCODE_HIBC_39: error_number = hibc(symbol, preprocessed, length); break;
		case BARCODE_HIBC_DM: error_number = hibc(symbol, preprocessed, length); break;
		case BARCODE_HIBC_QR: error_number = hibc(symbol, preprocessed, length); break;
		case BARCODE_HIBC_PDF: error_number = hibc(symbol, preprocessed, length); break;
		case BARCODE_HIBC_MICPDF: error_number = hibc(symbol, preprocessed, length); break;
		case BARCODE_HIBC_AZTEC: error_number = hibc(symbol, preprocessed, length); break;
		case BARCODE_JAPANPOST: error_number = japan_post(symbol, preprocessed, length); break;
		case BARCODE_CODE49: error_number = code_49(symbol, preprocessed, length); break;
		case BARCODE_CHANNEL: error_number = channel_code(symbol, preprocessed, length); break;
		case BARCODE_CODEONE: error_number = code_one(symbol, preprocessed, length); break;
		case BARCODE_DATAMATRIX: error_number = dmatrix(symbol, preprocessed, length); break;
		case BARCODE_PDF417: error_number = pdf417enc(symbol, preprocessed, length); break;
		case BARCODE_PDF417TRUNC: error_number = pdf417enc(symbol, preprocessed, length); break;
		case BARCODE_MICROPDF417: error_number = micro_pdf417(symbol, preprocessed, length); break;
		case BARCODE_MAXICODE: error_number = maxicode(symbol, preprocessed, length); break;
		case BARCODE_AZTEC: error_number = aztec(symbol, preprocessed, length); break;
	}
	
	return error_number;
}

int ZBarcode_Encode(struct zint_symbol *symbol, unsigned char *source, int length)
{
	int error_number, error_buffer, i;
        error_number = 0;

	if(length == 0) {
		length = ustrlen(source);
	}
	if(length == 0) {
		strcpy(symbol->errtxt, "No input data");
		error_tag(symbol->errtxt, ERROR_INVALID_DATA);
		return ERROR_INVALID_DATA;
	}

	
#ifndef _MSC_VER
        unsigned char local_source[length + 1];
#else
        unsigned char* local_source = (unsigned char*)_alloca(length + 1);
#endif
	
	/* First check the symbology field */
	if(symbol->symbology < 1) { strcpy(symbol->errtxt, "Symbology out of range, using Code 128"); symbol->symbology = BARCODE_CODE128; error_number = WARN_INVALID_OPTION; }

	/* symbol->symbologys 1 to 86 are defined by tbarcode */
	if(symbol->symbology == 5) { symbol->symbology = BARCODE_C25MATRIX; }
	if((symbol->symbology >= 10) && (symbol->symbology <= 12)) { symbol->symbology = BARCODE_EANX; }
	if((symbol->symbology == 14) || (symbol->symbology == 15)) { symbol->symbology = BARCODE_EANX; }
	if(symbol->symbology == 17) { symbol->symbology = BARCODE_UPCA; }
	if(symbol->symbology == 19) { strcpy(symbol->errtxt, "Codabar 18 not supported, using Codabar"); symbol->symbology = BARCODE_CODABAR; error_number = WARN_INVALID_OPTION; }
	if(symbol->symbology == 26) { symbol->symbology = BARCODE_UPCA; }
	if(symbol->symbology == 27) { strcpy(symbol->errtxt, "UPCD1 not supported"); error_number = ERROR_INVALID_OPTION; }
	if(symbol->symbology == 33) { symbol->symbology = BARCODE_EAN128; }
	if((symbol->symbology == 35) || (symbol->symbology == 36)) { symbol->symbology = BARCODE_UPCA; }
	if((symbol->symbology == 38) || (symbol->symbology == 39)) { symbol->symbology = BARCODE_UPCE; }
	if((symbol->symbology >= 41) && (symbol->symbology <= 45)) { symbol->symbology = BARCODE_POSTNET; }
	if(symbol->symbology == 46) { symbol->symbology = BARCODE_PLESSEY; }
	if(symbol->symbology == 48) { symbol->symbology = BARCODE_NVE18; }
	if(symbol->symbology == 54) { strcpy(symbol->errtxt, "General Parcel Code not supported, using Code 128"); symbol->symbology = BARCODE_CODE128; error_number = WARN_INVALID_OPTION; }
	if((symbol->symbology == 59) || (symbol->symbology == 61)) { symbol->symbology = BARCODE_CODE128; }
	if(symbol->symbology == 62) { symbol->symbology = BARCODE_CODE93; }
	if((symbol->symbology == 64) || (symbol->symbology == 65)) { symbol->symbology = BARCODE_AUSPOST; }
	if(symbol->symbology == 73) { strcpy(symbol->errtxt, "Codablock E not supported"); error_number = ERROR_INVALID_OPTION; }
	if(symbol->symbology == 78) { symbol->symbology = BARCODE_RSS14; }
	if(symbol->symbology == 83) { symbol->symbology = BARCODE_PLANET; }
	if(symbol->symbology == 88) { symbol->symbology = BARCODE_EAN128; }
	if(symbol->symbology == 91) { strcpy(symbol->errtxt, "Symbology out of range, using Code 128"); symbol->symbology = BARCODE_CODE128; error_number = WARN_INVALID_OPTION; }
	if((symbol->symbology >= 94) && (symbol->symbology <= 96)) { strcpy(symbol->errtxt, "Symbology out of range, using Code 128"); symbol->symbology = BARCODE_CODE128; error_number = WARN_INVALID_OPTION; }
	if(symbol->symbology == 100) { symbol->symbology = BARCODE_HIBC_128; }
	if(symbol->symbology == 101) { symbol->symbology = BARCODE_HIBC_39; }
	if(symbol->symbology == 103) { symbol->symbology = BARCODE_HIBC_DM; }
	if(symbol->symbology == 105) { symbol->symbology = BARCODE_HIBC_QR; }
	if(symbol->symbology == 107) { symbol->symbology = BARCODE_HIBC_PDF; }
	if(symbol->symbology == 109) { symbol->symbology = BARCODE_HIBC_MICPDF; }
	if(symbol->symbology == 111) { symbol->symbology = BARCODE_HIBC_BLOCKF; }
	if((symbol->symbology >= 113) && (symbol->symbology <= 127)) { strcpy(symbol->errtxt, "Symbology out of range, using Code 128"); symbol->symbology = BARCODE_CODE128; error_number = WARN_INVALID_OPTION; }
	/* Everything from 128 up is Zint-specific */
	if(symbol->symbology >= 143) { strcpy(symbol->errtxt, "Symbology out of range, using Code 128"); symbol->symbology = BARCODE_CODE128; error_number = WARN_INVALID_OPTION; }
	if((symbol->symbology == BARCODE_CODABLOCKF) || (symbol->symbology == BARCODE_HIBC_BLOCKF)) { strcpy(symbol->errtxt, "Codablock F not supported"); error_number = ERROR_INVALID_OPTION; }
	
	if(error_number > 4) {
		error_tag(symbol->errtxt, error_number);
		return error_number;
	} else {
		error_buffer = error_number;
	}
	
	if((symbol->input_mode < 0) || (symbol->input_mode > 2)) { symbol->input_mode = DATA_MODE; }
	
	if(symbol->input_mode == GS1_MODE) {
		for(i = 0; i < length; i++) {
			if(source[i] == '\0') {
				strcpy(symbol->errtxt, "NULL characters not permitted in GS1 mode");
				return ERROR_INVALID_DATA;
			}
		}
		if(gs1_compliant(symbol->symbology) == 1) {
			error_number = ugs1_verify(symbol, source, length, local_source);
			if(error_number != 0) { return error_number; }
			length = ustrlen(local_source);
		} else {
			strcpy(symbol->errtxt, "Selected symbology does not support GS1 mode");
			return ERROR_INVALID_OPTION;
		}
	} else {
		memcpy(local_source, source, length);
		local_source[length] = '\0';
	}
	
	switch(symbol->symbology) {
		case BARCODE_QRCODE:
		case BARCODE_MICROQR:
		case BARCODE_GRIDMATRIX:
			error_number = extended_charset(symbol, local_source, length);
			break;
		default:
			error_number = reduced_charset(symbol, local_source, length);
			break;
	}
	
	if((symbol->symbology == BARCODE_CODE128) || (symbol->symbology == BARCODE_CODE128B)) {
		for(i = 0; i < length; i++) {
			if(local_source[i] == '\0') {
				symbol->text[i] = ' ';
			} else {
				symbol->text[i] = local_source[i];
			}
		}
	}
	
	if(error_number == 0) {
		error_number = error_buffer;
	}
	error_tag(symbol->errtxt, error_number);
	/*printf("%s\n",symbol->text);*/
	return error_number;
}

int ZBarcode_Print(struct zint_symbol *symbol, int rotate_angle)
{
	int error_number;
	char output[4];
	
	switch(rotate_angle) {
		case 0:
		case 90:
		case 180:
		case 270:
			break;
		default:
			strcpy(symbol->errtxt, "Invalid rotation angle");
			return ERROR_INVALID_OPTION;
			break;
	}
	
	if(strlen(symbol->outfile) > 3) {
		output[0] = symbol->outfile[strlen(symbol->outfile) - 3];
		output[1] = symbol->outfile[strlen(symbol->outfile) - 2];
		output[2] = symbol->outfile[strlen(symbol->outfile) - 1];
		output[3] = '\0';
		to_upper((unsigned char*)output);

#ifndef NO_PNG
		if(!(strcmp(output, "PNG"))) {
			if(symbol->scale < 1.0) { symbol->text[0] = '\0'; }
			error_number = png_handle(symbol, rotate_angle);
		} else {
#endif
			if(!(strcmp(output, "EPS"))) {
				error_number = ps_plot(symbol);
			} else {
				if(!(strcmp(output, "SVG"))) {
					error_number = svg_plot(symbol);
				} else {
					strcpy(symbol->errtxt, "Unknown output format");
					error_tag(symbol->errtxt, ERROR_INVALID_OPTION);
					return ERROR_INVALID_OPTION;
				}
			}
#ifndef NO_PNG
		}
#endif
	} else {
		strcpy(symbol->errtxt, "Unknown output format");
		error_tag(symbol->errtxt, ERROR_INVALID_OPTION);
		return ERROR_INVALID_OPTION;
	}

	error_tag(symbol->errtxt, error_number);
	return error_number;
}

int ZBarcode_Buffer(struct zint_symbol *symbol, int rotate_angle)
{
	int error_number;
	
	switch(rotate_angle) {
		case 0:
		case 90:
		case 180:
		case 270:
			break;
		default:
			strcpy(symbol->errtxt, "Invalid rotation angle");
			return ERROR_INVALID_OPTION;
			break;
	}
	
	error_number = bmp_handle(symbol, rotate_angle);
	error_tag(symbol->errtxt, error_number);
	return error_number;
}

int ZBarcode_Encode_and_Print(struct zint_symbol *symbol, unsigned char *input, int length, int rotate_angle)
{
	int error_number;
	
	error_number = 0;
	
	error_number = ZBarcode_Encode(symbol, input, length);
	if(error_number != 0) {
		return error_number;
	}

	error_number = ZBarcode_Print(symbol, rotate_angle);
	return error_number;
}

int ZBarcode_Encode_and_Buffer(struct zint_symbol *symbol, unsigned char *input, int length, int rotate_angle)
{
	int error_number;
	
	error_number = 0;
	
	error_number = ZBarcode_Encode(symbol, input, length);
	if(error_number != 0) {
		return error_number;
	}

	error_number = ZBarcode_Buffer(symbol, rotate_angle);
	return error_number;
}

int ZBarcode_Encode_File(struct zint_symbol *symbol, char *filename)
{
	FILE *file;
	unsigned char *buffer;
	unsigned long fileLen;
	unsigned int nRead = 0, n = 0;
	int ret;

	file = fopen(filename, "rb");
	if (!file) {
		strcpy(symbol->errtxt, "Unable to read input file");
		return ERROR_INVALID_DATA;
	}
	
	/* Get file length */
	fseek(file, 0, SEEK_END);
	fileLen = ftell(file);
	fseek(file, 0, SEEK_SET);
	
	if(fileLen > 7100) {
		/* The largest amount of data that can be encoded is 7089 numeric digits in QR Code */
		strcpy(symbol->errtxt, "Input file too long");
		fclose(file);
		return ERROR_INVALID_DATA;
	}
	
	/* Allocate memory */
	buffer = (unsigned char *)malloc(fileLen * sizeof(unsigned char));
	if(!buffer) {
		strcpy(symbol->errtxt, "Internal memory error");
		fclose(file);
		return ERROR_MEMORY;
	}
	
	/* Read file contents into buffer */

	do
	{
		n = fread(buffer + nRead, 1, fileLen - nRead, file);
		if (ferror(file))
		{
			strcpy(symbol->errtxt, strerror(errno));
			nRead = 0;
			return ERROR_INVALID_DATA;
		}
		nRead += n;
	} while (!feof(file) && (0 < n) && (nRead < fileLen));
	
	fclose(file);
	ret = ZBarcode_Encode(symbol, buffer, nRead);
	free(buffer);
	return ret;
}

int ZBarcode_Encode_File_and_Print(struct zint_symbol *symbol, char *filename, int rotate_angle)
{
	int error_number;
	
	error_number = 0;
	
	error_number = ZBarcode_Encode_File(symbol, filename);
	if(error_number != 0) {
		return error_number;
	}
	
	return ZBarcode_Print(symbol, rotate_angle);
}

int ZBarcode_Encode_File_and_Buffer(struct zint_symbol *symbol, char *filename, int rotate_angle)
{
	int error_number;
	
	error_number = 0;
	
	error_number = ZBarcode_Encode_File(symbol, filename);
	if(error_number != 0) {
		return error_number;
	}
	
	return ZBarcode_Buffer(symbol, rotate_angle);
}

/*
 * Rendering support, initially added by Sam Lown.
 *
 * Converts encoded data into an intermediate format to be interpreted
 * in other applications using this library.
 *
 * If the width and height are not set to zero, the barcode will be resized to those
 * dimensions. The symbol->scale and symbol->height values are totally ignored in this case.
 *
 */
int ZBarcode_Render(struct zint_symbol *symbol, float width, float height)
{
	// Send the request to the render_plot method
	return render_plot(symbol, width, height);
}