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- /*
- * qrencode - QR Code encoder
- *
- * Copyright (C) 2006-2017 Kentaro Fukuchi <kentaro@fukuchi.org>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or any later version.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
- #if HAVE_CONFIG_H
- # include "config.h"
- #endif
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <errno.h>
- #include "qrencode.h"
- #include "qrspec.h"
- #include "mqrspec.h"
- #include "bitstream.h"
- #include "qrinput.h"
- #include "rsecc.h"
- #include "split.h"
- #include "mask.h"
- #include "mmask.h"
- /******************************************************************************
- * Raw code
- *****************************************************************************/
- typedef struct {
- int dataLength;
- int eccLength;
- unsigned char *data;
- unsigned char *ecc;
- } RSblock;
- typedef struct {
- int version;
- int dataLength;
- int eccLength;
- unsigned char *datacode;
- unsigned char *ecccode;
- int b1;
- int blocks;
- RSblock *rsblock;
- int count;
- } QRRawCode;
- static void RSblock_initBlock(RSblock *block, int dl, unsigned char *data, int el, unsigned char *ecc)
- {
- block->dataLength = dl;
- block->data = data;
- block->eccLength = el;
- block->ecc = ecc;
- RSECC_encode((size_t)dl, (size_t)el, data, ecc);
- }
- static int RSblock_init(RSblock *blocks, int spec[5], unsigned char *data, unsigned char *ecc)
- {
- int i;
- RSblock *block;
- unsigned char *dp, *ep;
- int el, dl;
- dl = QRspec_rsDataCodes1(spec);
- el = QRspec_rsEccCodes1(spec);
- block = blocks;
- dp = data;
- ep = ecc;
- for(i = 0; i < QRspec_rsBlockNum1(spec); i++) {
- RSblock_initBlock(block, dl, dp, el, ep);
- dp += dl;
- ep += el;
- block++;
- }
- if(QRspec_rsBlockNum2(spec) == 0) return 0;
- dl = QRspec_rsDataCodes2(spec);
- el = QRspec_rsEccCodes2(spec);
- for(i = 0; i < QRspec_rsBlockNum2(spec); i++) {
- RSblock_initBlock(block, dl, dp, el, ep);
- dp += dl;
- ep += el;
- block++;
- }
- return 0;
- }
- STATIC_IN_RELEASE void QRraw_free(QRRawCode *raw);
- STATIC_IN_RELEASE QRRawCode *QRraw_new(QRinput *input)
- {
- QRRawCode *raw;
- int spec[5], ret;
- raw = (QRRawCode *)malloc(sizeof(QRRawCode));
- if(raw == NULL) return NULL;
- raw->datacode = QRinput_getByteStream(input);
- if(raw->datacode == NULL) {
- free(raw);
- return NULL;
- }
- QRspec_getEccSpec(input->version, input->level, spec);
- raw->version = input->version;
- raw->b1 = QRspec_rsBlockNum1(spec);
- raw->dataLength = QRspec_rsDataLength(spec);
- raw->eccLength = QRspec_rsEccLength(spec);
- raw->ecccode = (unsigned char *)malloc((size_t)raw->eccLength);
- if(raw->ecccode == NULL) {
- free(raw->datacode);
- free(raw);
- return NULL;
- }
- raw->blocks = QRspec_rsBlockNum(spec);
- raw->rsblock = (RSblock *)calloc((size_t)(raw->blocks), sizeof(RSblock));
- if(raw->rsblock == NULL) {
- QRraw_free(raw);
- return NULL;
- }
- ret = RSblock_init(raw->rsblock, spec, raw->datacode, raw->ecccode);
- if(ret < 0) {
- QRraw_free(raw);
- return NULL;
- }
- raw->count = 0;
- return raw;
- }
- /**
- * Return a code (byte).
- * This function can be called iteratively.
- * @param raw raw code.
- * @return code
- */
- STATIC_IN_RELEASE unsigned char QRraw_getCode(QRRawCode *raw)
- {
- int col, row;
- unsigned char ret;
- if(raw->count < raw->dataLength) {
- row = raw->count % raw->blocks;
- col = raw->count / raw->blocks;
- if(col >= raw->rsblock[0].dataLength) {
- row += raw->b1;
- }
- ret = raw->rsblock[row].data[col];
- } else if(raw->count < raw->dataLength + raw->eccLength) {
- row = (raw->count - raw->dataLength) % raw->blocks;
- col = (raw->count - raw->dataLength) / raw->blocks;
- ret = raw->rsblock[row].ecc[col];
- } else {
- return 0;
- }
- raw->count++;
- return ret;
- }
- STATIC_IN_RELEASE void QRraw_free(QRRawCode *raw)
- {
- if(raw != NULL) {
- free(raw->datacode);
- free(raw->ecccode);
- free(raw->rsblock);
- free(raw);
- }
- }
- /******************************************************************************
- * Raw code for Micro QR Code
- *****************************************************************************/
- typedef struct {
- int version;
- int dataLength;
- int eccLength;
- unsigned char *datacode;
- unsigned char *ecccode;
- RSblock *rsblock;
- int oddbits;
- int count;
- } MQRRawCode;
- STATIC_IN_RELEASE void MQRraw_free(MQRRawCode *raw);
- STATIC_IN_RELEASE MQRRawCode *MQRraw_new(QRinput *input)
- {
- MQRRawCode *raw;
- raw = (MQRRawCode *)malloc(sizeof(MQRRawCode));
- if(raw == NULL) return NULL;
- raw->version = input->version;
- raw->dataLength = MQRspec_getDataLength(input->version, input->level);
- raw->eccLength = MQRspec_getECCLength(input->version, input->level);
- raw->oddbits = raw->dataLength * 8 - MQRspec_getDataLengthBit(input->version, input->level);
- raw->datacode = QRinput_getByteStream(input);
- if(raw->datacode == NULL) {
- free(raw);
- return NULL;
- }
- raw->ecccode = (unsigned char *)malloc((size_t)raw->eccLength);
- if(raw->ecccode == NULL) {
- free(raw->datacode);
- free(raw);
- return NULL;
- }
- raw->rsblock = (RSblock *)calloc(1, sizeof(RSblock));
- if(raw->rsblock == NULL) {
- MQRraw_free(raw);
- return NULL;
- }
- RSblock_initBlock(raw->rsblock, raw->dataLength, raw->datacode, raw->eccLength, raw->ecccode);
- raw->count = 0;
- return raw;
- }
- /**
- * Return a code (byte).
- * This function can be called iteratively.
- * @param raw raw code.
- * @return code
- */
- STATIC_IN_RELEASE unsigned char MQRraw_getCode(MQRRawCode *raw)
- {
- unsigned char ret;
- if(raw->count < raw->dataLength) {
- ret = raw->datacode[raw->count];
- } else if(raw->count < raw->dataLength + raw->eccLength) {
- ret = raw->ecccode[raw->count - raw->dataLength];
- } else {
- return 0;
- }
- raw->count++;
- return ret;
- }
- STATIC_IN_RELEASE void MQRraw_free(MQRRawCode *raw)
- {
- if(raw != NULL) {
- free(raw->datacode);
- free(raw->ecccode);
- free(raw->rsblock);
- free(raw);
- }
- }
- /******************************************************************************
- * Frame filling
- *****************************************************************************/
- typedef struct {
- int width;
- unsigned char *frame;
- int x, y;
- int dir;
- int bit;
- int mqr;
- } FrameFiller;
- static void FrameFiller_set(FrameFiller *filler, int width, unsigned char *frame, int mqr)
- {
- filler->width = width;
- filler->frame = frame;
- filler->x = width - 1;
- filler->y = width - 1;
- filler->dir = -1;
- filler->bit = -1;
- filler->mqr = mqr;
- }
- static unsigned char *FrameFiller_next(FrameFiller *filler)
- {
- unsigned char *p;
- int x, y, w;
- if(filler->bit == -1) {
- filler->bit = 0;
- return filler->frame + filler->y * filler->width + filler->x;
- }
- x = filler->x;
- y = filler->y;
- p = filler->frame;
- w = filler->width;
- if(filler->bit == 0) {
- x--;
- filler->bit++;
- } else {
- x++;
- y += filler->dir;
- filler->bit--;
- }
- if(filler->dir < 0) {
- if(y < 0) {
- y = 0;
- x -= 2;
- filler->dir = 1;
- if(!filler->mqr && x == 6) {
- x--;
- y = 9;
- }
- }
- } else if(y == w) {
- y = w - 1;
- x -= 2;
- filler->dir = -1;
- if(!filler->mqr && x == 6) {
- x--;
- y -= 8;
- }
- }
- if(x < 0 || y < 0) return NULL;
- filler->x = x;
- filler->y = y;
- if(p[y * w + x] & 0x80) {
- // This tail recursion could be optimized.
- return FrameFiller_next(filler);
- }
- return &p[y * w + x];
- }
- #ifdef WITH_TESTS
- unsigned char *FrameFiller_test(int version)
- {
- int width;
- unsigned char *frame, *p;
- int i, length;
- FrameFiller filler;
- width = QRspec_getWidth(version);
- frame = QRspec_newFrame(version);
- if(frame == NULL) return NULL;
- FrameFiller_set(&filler, width, frame, 0);
- length = QRspec_getDataLength(version, QR_ECLEVEL_L) * 8
- + QRspec_getECCLength(version, QR_ECLEVEL_L) * 8
- + QRspec_getRemainder(version);
- for(i = 0; i < length; i++) {
- p = FrameFiller_next(&filler);
- if(p == NULL) {
- free(frame);
- return NULL;
- }
- *p = (unsigned char)(i & 0x7f) | 0x80;
- }
- return frame;
- }
- unsigned char *FrameFiller_testMQR(int version)
- {
- int width;
- unsigned char *frame, *p;
- int i, length;
- FrameFiller filler;
- width = MQRspec_getWidth(version);
- frame = MQRspec_newFrame(version);
- if(frame == NULL) return NULL;
- FrameFiller_set(&filler, width, frame, 1);
- length = MQRspec_getDataLengthBit(version, QR_ECLEVEL_L)
- + MQRspec_getECCLength(version, QR_ECLEVEL_L) * 8;
- for(i = 0; i < length; i++) {
- p = FrameFiller_next(&filler);
- if(p == NULL) {
- fprintf(stderr, "Frame filler run over the frame!\n");
- return frame;
- }
- *p = (unsigned char)(i & 0x7f) | 0x80;
- }
- return frame;
- }
- #endif
- /******************************************************************************
- * QR-code encoding
- *****************************************************************************/
- STATIC_IN_RELEASE QRcode *QRcode_new(int version, int width, unsigned char *data)
- {
- QRcode *qrcode;
- qrcode = (QRcode *)malloc(sizeof(QRcode));
- if(qrcode == NULL) return NULL;
- qrcode->version = version;
- qrcode->width = width;
- qrcode->data = data;
- return qrcode;
- }
- void QRcode_free(QRcode *qrcode)
- {
- if(qrcode != NULL) {
- free(qrcode->data);
- free(qrcode);
- }
- }
- STATIC_IN_RELEASE QRcode *QRcode_encodeMask(QRinput *input, int mask)
- {
- int width, version;
- QRRawCode *raw;
- unsigned char *frame, *masked, *p, code, bit;
- int i, j;
- QRcode *qrcode = NULL;
- FrameFiller filler;
- if(input->mqr) {
- errno = EINVAL;
- return NULL;
- }
- if(input->version < 0 || input->version > QRSPEC_VERSION_MAX) {
- errno = EINVAL;
- return NULL;
- }
- if(input->level > QR_ECLEVEL_H) {
- errno = EINVAL;
- return NULL;
- }
- raw = QRraw_new(input);
- if(raw == NULL) return NULL;
- version = raw->version;
- width = QRspec_getWidth(version);
- frame = QRspec_newFrame(version);
- if(frame == NULL) {
- QRraw_free(raw);
- return NULL;
- }
- FrameFiller_set(&filler, width, frame, 0);
- /* interleaved data and ecc codes */
- for(i = 0; i < raw->dataLength; i++) {
- code = QRraw_getCode(raw);
- bit = 0x80;
- for(j = 0; j < 8; j++) {
- p = FrameFiller_next(&filler);
- if(p == NULL) goto EXIT;
- *p = ((bit & code) != 0);
- bit = bit >> 1;
- }
- }
- for(i = 0; i < raw->eccLength; i++) {
- code = QRraw_getCode(raw);
- bit = 0x80;
- for(j = 0; j < 8; j++) {
- p = FrameFiller_next(&filler);
- if(p == NULL) goto EXIT;
- *p = 0x02 | ((bit & code) != 0);
- bit = bit >> 1;
- }
- }
- QRraw_free(raw);
- raw = NULL;
- /* remainder bits */
- j = QRspec_getRemainder(version);
- for(i = 0; i < j; i++) {
- p = FrameFiller_next(&filler);
- if(p == NULL) goto EXIT;
- *p = 0x02;
- }
- /* masking */
- if(mask == -2) { // just for debug purpose
- masked = (unsigned char *)malloc((size_t)(width * width));
- memcpy(masked, frame, (size_t)(width * width));
- } else if(mask < 0) {
- masked = Mask_mask(width, frame, input->level);
- } else {
- masked = Mask_makeMask(width, frame, mask, input->level);
- }
- if(masked == NULL) {
- goto EXIT;
- }
- qrcode = QRcode_new(version, width, masked);
- if(qrcode == NULL) {
- free(masked);
- }
- EXIT:
- QRraw_free(raw);
- free(frame);
- return qrcode;
- }
- STATIC_IN_RELEASE QRcode *QRcode_encodeMaskMQR(QRinput *input, int mask)
- {
- int width, version;
- MQRRawCode *raw;
- unsigned char *frame, *masked, *p, code, bit;
- int i, j, length;
- QRcode *qrcode = NULL;
- FrameFiller filler;
- if(!input->mqr) {
- errno = EINVAL;
- return NULL;
- }
- if(input->version <= 0 || input->version > MQRSPEC_VERSION_MAX) {
- errno = EINVAL;
- return NULL;
- }
- if(input->level > QR_ECLEVEL_Q) {
- errno = EINVAL;
- return NULL;
- }
- raw = MQRraw_new(input);
- if(raw == NULL) return NULL;
- version = raw->version;
- width = MQRspec_getWidth(version);
- frame = MQRspec_newFrame(version);
- if(frame == NULL) {
- MQRraw_free(raw);
- return NULL;
- }
- FrameFiller_set(&filler, width, frame, 1);
- /* interleaved data and ecc codes */
- for(i = 0; i < raw->dataLength; i++) {
- code = MQRraw_getCode(raw);
- bit = 0x80;
- if(raw->oddbits && i == raw->dataLength - 1) {
- length = raw->oddbits;
- } else {
- length = 8;
- }
- for(j = 0; j < length; j++) {
- p = FrameFiller_next(&filler);
- if(p == NULL) goto EXIT;
- *p = ((bit & code) != 0);
- bit = bit >> 1;
- }
- }
- for(i = 0; i < raw->eccLength; i++) {
- code = MQRraw_getCode(raw);
- bit = 0x80;
- length = 8;
- for(j = 0; j < length; j++) {
- p = FrameFiller_next(&filler);
- if(p == NULL) goto EXIT;
- *p = 0x02 | ((bit & code) != 0);
- bit = bit >> 1;
- }
- }
- MQRraw_free(raw);
- raw = NULL;
- /* masking */
- if(mask == -2) { // just for debug purpose
- masked = (unsigned char *)malloc((size_t)(width * width));
- memcpy(masked, frame, (size_t)(width * width));
- } else if(mask < 0) {
- masked = MMask_mask(version, frame, input->level);
- } else {
- masked = MMask_makeMask(version, frame, mask, input->level);
- }
- if(masked == NULL) {
- goto EXIT;
- }
- qrcode = QRcode_new(version, width, masked);
- if(qrcode == NULL) {
- free(masked);
- }
- EXIT:
- MQRraw_free(raw);
- free(frame);
- return qrcode;
- }
- QRcode *QRcode_encodeInput(QRinput *input)
- {
- if(input->mqr) {
- return QRcode_encodeMaskMQR(input, -1);
- } else {
- return QRcode_encodeMask(input, -1);
- }
- }
- static QRcode *QRcode_encodeStringReal(const char *string, int version, QRecLevel level, int mqr, QRencodeMode hint, int casesensitive)
- {
- QRinput *input;
- QRcode *code;
- int ret;
- if(string == NULL) {
- errno = EINVAL;
- return NULL;
- }
- if(hint != QR_MODE_8 && hint != QR_MODE_KANJI) {
- errno = EINVAL;
- return NULL;
- }
- if(mqr) {
- input = QRinput_newMQR(version, level);
- } else {
- input = QRinput_new2(version, level);
- }
- if(input == NULL) return NULL;
- ret = Split_splitStringToQRinput(string, input, hint, casesensitive);
- if(ret < 0) {
- QRinput_free(input);
- return NULL;
- }
- code = QRcode_encodeInput(input);
- QRinput_free(input);
- return code;
- }
- QRcode *QRcode_encodeString(const char *string, int version, QRecLevel level, QRencodeMode hint, int casesensitive)
- {
- return QRcode_encodeStringReal(string, version, level, 0, hint, casesensitive);
- }
- QRcode *QRcode_encodeStringMQR(const char *string, int version, QRecLevel level, QRencodeMode hint, int casesensitive)
- {
- return QRcode_encodeStringReal(string, version, level, 1, hint, casesensitive);
- }
- static QRcode *QRcode_encodeDataReal(const unsigned char *data, int length, int version, QRecLevel level, int mqr)
- {
- QRinput *input;
- QRcode *code;
- int ret;
- if(data == NULL || length == 0) {
- errno = EINVAL;
- return NULL;
- }
- if(mqr) {
- input = QRinput_newMQR(version, level);
- } else {
- input = QRinput_new2(version, level);
- }
- if(input == NULL) return NULL;
- ret = QRinput_append(input, QR_MODE_8, length, data);
- if(ret < 0) {
- QRinput_free(input);
- return NULL;
- }
- code = QRcode_encodeInput(input);
- QRinput_free(input);
- return code;
- }
- QRcode *QRcode_encodeData(int size, const unsigned char *data, int version, QRecLevel level)
- {
- return QRcode_encodeDataReal(data, size, version, level, 0);
- }
- QRcode *QRcode_encodeString8bit(const char *string, int version, QRecLevel level)
- {
- if(string == NULL) {
- errno = EINVAL;
- return NULL;
- }
- return QRcode_encodeDataReal((unsigned char *)string, (int)strlen(string), version, level, 0);
- }
- QRcode *QRcode_encodeDataMQR(int size, const unsigned char *data, int version, QRecLevel level)
- {
- return QRcode_encodeDataReal(data, size, version, level, 1);
- }
- QRcode *QRcode_encodeString8bitMQR(const char *string, int version, QRecLevel level)
- {
- if(string == NULL) {
- errno = EINVAL;
- return NULL;
- }
- return QRcode_encodeDataReal((unsigned char *)string, (int)strlen(string), version, level, 1);
- }
- /******************************************************************************
- * Structured QR-code encoding
- *****************************************************************************/
- static QRcode_List *QRcode_List_newEntry(void)
- {
- QRcode_List *entry;
- entry = (QRcode_List *)malloc(sizeof(QRcode_List));
- if(entry == NULL) return NULL;
- entry->next = NULL;
- entry->code = NULL;
- return entry;
- }
- static void QRcode_List_freeEntry(QRcode_List *entry)
- {
- if(entry != NULL) {
- QRcode_free(entry->code);
- free(entry);
- }
- }
- void QRcode_List_free(QRcode_List *qrlist)
- {
- QRcode_List *list = qrlist, *next;
- while(list != NULL) {
- next = list->next;
- QRcode_List_freeEntry(list);
- list = next;
- }
- }
- int QRcode_List_size(QRcode_List *qrlist)
- {
- QRcode_List *list = qrlist;
- int size = 0;
- while(list != NULL) {
- size++;
- list = list->next;
- }
- return size;
- }
- #if 0
- static unsigned char QRcode_parity(const char *str, int size)
- {
- unsigned char parity = 0;
- int i;
- for(i = 0; i < size; i++) {
- parity ^= str[i];
- }
- return parity;
- }
- #endif
- QRcode_List *QRcode_encodeInputStructured(QRinput_Struct *s)
- {
- QRcode_List *head = NULL;
- QRcode_List *tail = NULL;
- QRcode_List *entry;
- QRinput_InputList *list = s->head;
- while(list != NULL) {
- if(head == NULL) {
- entry = QRcode_List_newEntry();
- if(entry == NULL) goto ABORT;
- head = entry;
- tail = head;
- } else {
- entry = QRcode_List_newEntry();
- if(entry == NULL) goto ABORT;
- tail->next = entry;
- tail = tail->next;
- }
- tail->code = QRcode_encodeInput(list->input);
- if(tail->code == NULL) {
- goto ABORT;
- }
- list = list->next;
- }
- return head;
- ABORT:
- QRcode_List_free(head);
- return NULL;
- }
- static QRcode_List *QRcode_encodeInputToStructured(QRinput *input)
- {
- QRinput_Struct *s;
- QRcode_List *codes;
- s = QRinput_splitQRinputToStruct(input);
- if(s == NULL) return NULL;
- codes = QRcode_encodeInputStructured(s);
- QRinput_Struct_free(s);
- return codes;
- }
- static QRcode_List *QRcode_encodeDataStructuredReal(
- int size, const unsigned char *data,
- int version, QRecLevel level,
- int eightbit, QRencodeMode hint, int casesensitive)
- {
- QRinput *input;
- QRcode_List *codes;
- int ret;
- if(version <= 0) {
- errno = EINVAL;
- return NULL;
- }
- if(!eightbit && (hint != QR_MODE_8 && hint != QR_MODE_KANJI)) {
- errno = EINVAL;
- return NULL;
- }
- input = QRinput_new2(version, level);
- if(input == NULL) return NULL;
- if(eightbit) {
- ret = QRinput_append(input, QR_MODE_8, size, data);
- } else {
- ret = Split_splitStringToQRinput((char *)data, input, hint, casesensitive);
- }
- if(ret < 0) {
- QRinput_free(input);
- return NULL;
- }
- codes = QRcode_encodeInputToStructured(input);
- QRinput_free(input);
- return codes;
- }
- QRcode_List *QRcode_encodeDataStructured(int size, const unsigned char *data, int version, QRecLevel level) {
- return QRcode_encodeDataStructuredReal(size, data, version, level, 1, QR_MODE_NUL, 0);
- }
- QRcode_List *QRcode_encodeString8bitStructured(const char *string, int version, QRecLevel level) {
- if(string == NULL) {
- errno = EINVAL;
- return NULL;
- }
- return QRcode_encodeDataStructured((int)strlen(string), (unsigned char *)string, version, level);
- }
- QRcode_List *QRcode_encodeStringStructured(const char *string, int version, QRecLevel level, QRencodeMode hint, int casesensitive)
- {
- if(string == NULL) {
- errno = EINVAL;
- return NULL;
- }
- return QRcode_encodeDataStructuredReal((int)strlen(string), (unsigned char *)string, version, level, 0, hint, casesensitive);
- }
- /******************************************************************************
- * System utilities
- *****************************************************************************/
- void QRcode_APIVersion(int *major_version, int *minor_version, int *micro_version)
- {
- if(major_version != NULL) {
- *major_version = MAJOR_VERSION;
- }
- if(minor_version != NULL) {
- *minor_version = MINOR_VERSION;
- }
- if(micro_version != NULL) {
- *micro_version = MICRO_VERSION;
- }
- }
- char *QRcode_APIVersionString(void)
- {
- return VERSION;
- }
- void QRcode_clearCache(void)
- {
- return;
- }
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