1 /*
2 * QR Code generator demo (C)
3 *
4 * Run this command-line program with no arguments. The program
5 * computes a demonstration QR Codes and print it to the console.
6 *
7 * Copyright (c) Project Nayuki. (MIT License)
8 * https://www.nayuki.io/page/qr-code-generator-library
9 *
10 * Permission is hereby granted, free of charge, to any person obtaining a copy of
11 * this software and associated documentation files (the "Software"), to deal in
12 * the Software without restriction, including without limitation the rights to
13 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
14 * the Software, and to permit persons to whom the Software is furnished to do so,
15 * subject to the following conditions:
16 * - The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
18 * - The Software is provided "as is", without warranty of any kind, express or
19 * implied, including but not limited to the warranties of merchantability,
20 * fitness for a particular purpose and noninfringement. In no event shall the
21 * authors or copyright holders be liable for any claim, damages or other
22 * liability, whether in an action of contract, tort or otherwise, arising from,
23 * out of or in connection with the Software or the use or other dealings in the
24 * Software.
25 */
26
27 #include <stdbool.h>
28 #include <stddef.h>
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include "qrcodegen.h"
33
34
35 // Function prototypes
36 static void doBasicDemo(void);
37 static void doVarietyDemo(void);
38 static void doSegmentDemo(void);
39 static void doMaskDemo(void);
40 static void printQr(const uint8_t qrcode[]);
41
42
43 // The main application program.
main(void)44 int main(void) {
45 doBasicDemo();
46 doVarietyDemo();
47 doSegmentDemo();
48 doMaskDemo();
49 return EXIT_SUCCESS;
50 }
51
52
53
54 /*---- Demo suite ----*/
55
56 // Creates a single QR Code, then prints it to the console.
doBasicDemo(void)57 static void doBasicDemo(void) {
58 const char *text = "Hello, world!"; // User-supplied text
59 enum qrcodegen_Ecc errCorLvl = qrcodegen_Ecc_LOW; // Error correction level
60
61 // Make and print the QR Code symbol
62 uint8_t qrcode[qrcodegen_BUFFER_LEN_MAX];
63 uint8_t tempBuffer[qrcodegen_BUFFER_LEN_MAX];
64 bool ok = qrcodegen_encodeText(text, tempBuffer, qrcode, errCorLvl,
65 qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_AUTO, true);
66 if (ok)
67 printQr(qrcode);
68 }
69
70
71 // Creates a variety of QR Codes that exercise different features of the library, and prints each one to the console.
doVarietyDemo(void)72 static void doVarietyDemo(void) {
73 { // Numeric mode encoding (3.33 bits per digit)
74 uint8_t qrcode[qrcodegen_BUFFER_LEN_MAX];
75 uint8_t tempBuffer[qrcodegen_BUFFER_LEN_MAX];
76 bool ok = qrcodegen_encodeText("314159265358979323846264338327950288419716939937510", tempBuffer, qrcode,
77 qrcodegen_Ecc_MEDIUM, qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_AUTO, true);
78 if (ok)
79 printQr(qrcode);
80 }
81
82 { // Alphanumeric mode encoding (5.5 bits per character)
83 uint8_t qrcode[qrcodegen_BUFFER_LEN_MAX];
84 uint8_t tempBuffer[qrcodegen_BUFFER_LEN_MAX];
85 bool ok = qrcodegen_encodeText("DOLLAR-AMOUNT:$39.87 PERCENTAGE:100.00% OPERATIONS:+-*/", tempBuffer, qrcode,
86 qrcodegen_Ecc_HIGH, qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_AUTO, true);
87 if (ok)
88 printQr(qrcode);
89 }
90
91 { // Unicode text as UTF-8
92 const char *text = "\xE3\x81\x93\xE3\x82\x93\xE3\x81\xAB\xE3\x81\xA1wa\xE3\x80\x81"
93 "\xE4\xB8\x96\xE7\x95\x8C\xEF\xBC\x81\x20\xCE\xB1\xCE\xB2\xCE\xB3\xCE\xB4";
94 uint8_t qrcode[qrcodegen_BUFFER_LEN_MAX];
95 uint8_t tempBuffer[qrcodegen_BUFFER_LEN_MAX];
96 bool ok = qrcodegen_encodeText(text, tempBuffer, qrcode,
97 qrcodegen_Ecc_QUARTILE, qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_AUTO, true);
98 if (ok)
99 printQr(qrcode);
100 }
101
102 { // Moderately large QR Code using longer text (from Lewis Carroll's Alice in Wonderland)
103 const char *text =
104 "Alice was beginning to get very tired of sitting by her sister on the bank, "
105 "and of having nothing to do: once or twice she had peeped into the book her sister was reading, "
106 "but it had no pictures or conversations in it, 'and what is the use of a book,' thought Alice "
107 "'without pictures or conversations?' So she was considering in her own mind (as well as she could, "
108 "for the hot day made her feel very sleepy and stupid), whether the pleasure of making a "
109 "daisy-chain would be worth the trouble of getting up and picking the daisies, when suddenly "
110 "a White Rabbit with pink eyes ran close by her.";
111 uint8_t qrcode[qrcodegen_BUFFER_LEN_MAX];
112 uint8_t tempBuffer[qrcodegen_BUFFER_LEN_MAX];
113 bool ok = qrcodegen_encodeText(text, tempBuffer, qrcode,
114 qrcodegen_Ecc_HIGH, qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_AUTO, true);
115 if (ok)
116 printQr(qrcode);
117 }
118 }
119
120
121 // Creates QR Codes with manually specified segments for better compactness.
doSegmentDemo(void)122 static void doSegmentDemo(void) {
123 { // Illustration "silver"
124 const char *silver0 = "THE SQUARE ROOT OF 2 IS 1.";
125 const char *silver1 = "41421356237309504880168872420969807856967187537694807317667973799";
126 uint8_t qrcode[qrcodegen_BUFFER_LEN_MAX];
127 uint8_t tempBuffer[qrcodegen_BUFFER_LEN_MAX];
128 bool ok;
129 {
130 char *concat = calloc(strlen(silver0) + strlen(silver1) + 1, sizeof(char));
131 if (concat == NULL) {
132 perror("calloc");
133 exit(EXIT_FAILURE);
134 }
135 strcat(concat, silver0);
136 strcat(concat, silver1);
137 ok = qrcodegen_encodeText(concat, tempBuffer, qrcode, qrcodegen_Ecc_LOW,
138 qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_AUTO, true);
139 if (ok)
140 printQr(qrcode);
141 free(concat);
142 }
143 {
144 uint8_t *segBuf0 = malloc(qrcodegen_calcSegmentBufferSize(qrcodegen_Mode_ALPHANUMERIC, strlen(silver0)) * sizeof(uint8_t));
145 uint8_t *segBuf1 = malloc(qrcodegen_calcSegmentBufferSize(qrcodegen_Mode_NUMERIC, strlen(silver1)) * sizeof(uint8_t));
146 if (segBuf0 == NULL || segBuf1 == NULL) {
147 perror("malloc");
148 exit(EXIT_FAILURE);
149 }
150 struct qrcodegen_Segment segs[] = {
151 qrcodegen_makeAlphanumeric(silver0, segBuf0),
152 qrcodegen_makeNumeric(silver1, segBuf1),
153 };
154 ok = qrcodegen_encodeSegments(segs, sizeof(segs) / sizeof(segs[0]), qrcodegen_Ecc_LOW, tempBuffer, qrcode);
155 free(segBuf0);
156 free(segBuf1);
157 if (ok)
158 printQr(qrcode);
159 }
160 }
161
162 { // Illustration "golden"
163 const char *golden0 = "Golden ratio \xCF\x86 = 1.";
164 const char *golden1 = "6180339887498948482045868343656381177203091798057628621354486227052604628189024497072072041893911374";
165 const char *golden2 = "......";
166 uint8_t qrcode[qrcodegen_BUFFER_LEN_MAX];
167 uint8_t tempBuffer[qrcodegen_BUFFER_LEN_MAX];
168 bool ok;
169 {
170 char *concat = calloc(strlen(golden0) + strlen(golden1) + strlen(golden2) + 1, sizeof(char));
171 if (concat == NULL) {
172 perror("calloc");
173 exit(EXIT_FAILURE);
174 }
175 strcat(concat, golden0);
176 strcat(concat, golden1);
177 strcat(concat, golden2);
178 ok = qrcodegen_encodeText(concat, tempBuffer, qrcode, qrcodegen_Ecc_LOW,
179 qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_AUTO, true);
180 if (ok)
181 printQr(qrcode);
182 free(concat);
183 }
184 {
185 uint8_t *bytes = malloc(strlen(golden0) * sizeof(uint8_t));
186 if (bytes == NULL) {
187 perror("malloc");
188 exit(EXIT_FAILURE);
189 }
190 for (size_t i = 0, len = strlen(golden0); i < len; i++)
191 bytes[i] = (uint8_t)golden0[i];
192 uint8_t *segBuf0 = malloc(qrcodegen_calcSegmentBufferSize(qrcodegen_Mode_BYTE, strlen(golden0)) * sizeof(uint8_t));
193 uint8_t *segBuf1 = malloc(qrcodegen_calcSegmentBufferSize(qrcodegen_Mode_NUMERIC, strlen(golden1)) * sizeof(uint8_t));
194 uint8_t *segBuf2 = malloc(qrcodegen_calcSegmentBufferSize(qrcodegen_Mode_ALPHANUMERIC, strlen(golden2)) * sizeof(uint8_t));
195 if (segBuf0 == NULL || segBuf1 == NULL || segBuf2 == NULL) {
196 perror("malloc");
197 exit(EXIT_FAILURE);
198 }
199 struct qrcodegen_Segment segs[] = {
200 qrcodegen_makeBytes(bytes, strlen(golden0), segBuf0),
201 qrcodegen_makeNumeric(golden1, segBuf1),
202 qrcodegen_makeAlphanumeric(golden2, segBuf2),
203 };
204 free(bytes);
205 ok = qrcodegen_encodeSegments(segs, sizeof(segs) / sizeof(segs[0]), qrcodegen_Ecc_LOW, tempBuffer, qrcode);
206 free(segBuf0);
207 free(segBuf1);
208 free(segBuf2);
209 if (ok)
210 printQr(qrcode);
211 }
212 }
213
214 { // Illustration "Madoka": kanji, kana, Cyrillic, full-width Latin, Greek characters
215 uint8_t qrcode[qrcodegen_BUFFER_LEN_MAX];
216 uint8_t tempBuffer[qrcodegen_BUFFER_LEN_MAX];
217 bool ok;
218 {
219 const char *madoka = // Encoded in UTF-8
220 "\xE3\x80\x8C\xE9\xAD\x94\xE6\xB3\x95\xE5"
221 "\xB0\x91\xE5\xA5\xB3\xE3\x81\xBE\xE3\x81"
222 "\xA9\xE3\x81\x8B\xE2\x98\x86\xE3\x83\x9E"
223 "\xE3\x82\xAE\xE3\x82\xAB\xE3\x80\x8D\xE3"
224 "\x81\xA3\xE3\x81\xA6\xE3\x80\x81\xE3\x80"
225 "\x80\xD0\x98\xD0\x90\xD0\x98\xE3\x80\x80"
226 "\xEF\xBD\x84\xEF\xBD\x85\xEF\xBD\x93\xEF"
227 "\xBD\x95\xE3\x80\x80\xCE\xBA\xCE\xB1\xEF"
228 "\xBC\x9F";
229 ok = qrcodegen_encodeText(madoka, tempBuffer, qrcode, qrcodegen_Ecc_LOW,
230 qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_AUTO, true);
231 if (ok)
232 printQr(qrcode);
233 }
234 {
235 const int kanjiChars[] = { // Kanji mode encoding (13 bits per character)
236 0x0035, 0x1002, 0x0FC0, 0x0AED, 0x0AD7,
237 0x015C, 0x0147, 0x0129, 0x0059, 0x01BD,
238 0x018D, 0x018A, 0x0036, 0x0141, 0x0144,
239 0x0001, 0x0000, 0x0249, 0x0240, 0x0249,
240 0x0000, 0x0104, 0x0105, 0x0113, 0x0115,
241 0x0000, 0x0208, 0x01FF, 0x0008,
242 };
243 size_t len = sizeof(kanjiChars) / sizeof(kanjiChars[0]);
244 uint8_t *segBuf = calloc(qrcodegen_calcSegmentBufferSize(qrcodegen_Mode_KANJI, len), sizeof(uint8_t));
245 if (segBuf == NULL) {
246 perror("calloc");
247 exit(EXIT_FAILURE);
248 }
249 struct qrcodegen_Segment seg;
250 seg.mode = qrcodegen_Mode_KANJI;
251 seg.numChars = (int)len;
252 seg.bitLength = 0;
253 for (size_t i = 0; i < len; i++) {
254 for (int j = 12; j >= 0; j--, seg.bitLength++)
255 segBuf[seg.bitLength >> 3] |= ((kanjiChars[i] >> j) & 1) << (7 - (seg.bitLength & 7));
256 }
257 seg.data = segBuf;
258 ok = qrcodegen_encodeSegments(&seg, 1, qrcodegen_Ecc_LOW, tempBuffer, qrcode);
259 free(segBuf);
260 if (ok)
261 printQr(qrcode);
262 }
263 }
264 }
265
266
267 // Creates QR Codes with the same size and contents but different mask patterns.
doMaskDemo(void)268 static void doMaskDemo(void) {
269 { // Project Nayuki URL
270 uint8_t qrcode[qrcodegen_BUFFER_LEN_MAX];
271 uint8_t tempBuffer[qrcodegen_BUFFER_LEN_MAX];
272 bool ok;
273
274 ok = qrcodegen_encodeText("https://www.nayuki.io/", tempBuffer, qrcode,
275 qrcodegen_Ecc_HIGH, qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_AUTO, true);
276 if (ok)
277 printQr(qrcode);
278
279 ok = qrcodegen_encodeText("https://www.nayuki.io/", tempBuffer, qrcode,
280 qrcodegen_Ecc_HIGH, qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_3, true);
281 if (ok)
282 printQr(qrcode);
283 }
284
285 { // Chinese text as UTF-8
286 const char *text =
287 "\xE7\xB6\xAD\xE5\x9F\xBA\xE7\x99\xBE\xE7\xA7\x91\xEF\xBC\x88\x57\x69\x6B\x69\x70"
288 "\x65\x64\x69\x61\xEF\xBC\x8C\xE8\x81\x86\xE8\x81\xBD\x69\x2F\xCB\x8C\x77\xC9\xAA"
289 "\x6B\xE1\xB5\xBB\xCB\x88\x70\x69\xCB\x90\x64\x69\x2E\xC9\x99\x2F\xEF\xBC\x89\xE6"
290 "\x98\xAF\xE4\xB8\x80\xE5\x80\x8B\xE8\x87\xAA\xE7\x94\xB1\xE5\x85\xA7\xE5\xAE\xB9"
291 "\xE3\x80\x81\xE5\x85\xAC\xE9\x96\x8B\xE7\xB7\xA8\xE8\xBC\xAF\xE4\xB8\x94\xE5\xA4"
292 "\x9A\xE8\xAA\x9E\xE8\xA8\x80\xE7\x9A\x84\xE7\xB6\xB2\xE8\xB7\xAF\xE7\x99\xBE\xE7"
293 "\xA7\x91\xE5\x85\xA8\xE6\x9B\xB8\xE5\x8D\x94\xE4\xBD\x9C\xE8\xA8\x88\xE7\x95\xAB";
294 uint8_t qrcode[qrcodegen_BUFFER_LEN_MAX];
295 uint8_t tempBuffer[qrcodegen_BUFFER_LEN_MAX];
296 bool ok;
297
298 ok = qrcodegen_encodeText(text, tempBuffer, qrcode,
299 qrcodegen_Ecc_MEDIUM, qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_0, true);
300 if (ok)
301 printQr(qrcode);
302
303 ok = qrcodegen_encodeText(text, tempBuffer, qrcode,
304 qrcodegen_Ecc_MEDIUM, qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_1, true);
305 if (ok)
306 printQr(qrcode);
307
308 ok = qrcodegen_encodeText(text, tempBuffer, qrcode,
309 qrcodegen_Ecc_MEDIUM, qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_5, true);
310 if (ok)
311 printQr(qrcode);
312
313 ok = qrcodegen_encodeText(text, tempBuffer, qrcode,
314 qrcodegen_Ecc_MEDIUM, qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_7, true);
315 if (ok)
316 printQr(qrcode);
317 }
318 }
319
320
321
322 /*---- Utilities ----*/
323
324 // Prints the given QR Code to the console.
printQr(const uint8_t qrcode[])325 static void printQr(const uint8_t qrcode[]) {
326 int size = qrcodegen_getSize(qrcode);
327 int border = 4;
328 for (int y = -border; y < size + border; y++) {
329 for (int x = -border; x < size + border; x++) {
330 fputs((qrcodegen_getModule(qrcode, x, y) ? "##" : " "), stdout);
331 }
332 fputs("\n", stdout);
333 }
334 fputs("\n", stdout);
335 }
336