95 lines
2.3 KiB
C
95 lines
2.3 KiB
C
/* quirc -- QR-code recognition library
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* Copyright (C) 2010-2012 Daniel Beer <dlbeer@gmail.com>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "quirc_internal.h"
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const char *quirc_version(void)
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{
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return "1.0";
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}
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struct quirc *quirc_new(void)
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{
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struct quirc *q = malloc(sizeof(*q));
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if (!q)
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return NULL;
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memset(q, 0, sizeof(*q));
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return q;
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}
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void quirc_destroy(struct quirc *q)
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{
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if (q->image)
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free(q->image);
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if (sizeof(*q->image) != sizeof(*q->pixels))
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free(q->pixels);
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free(q);
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}
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int quirc_resize(struct quirc *q, int w, int h)
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{
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uint8_t *new_image = realloc(q->image, w * h);
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if (!new_image)
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return -1;
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if (sizeof(*q->image) != sizeof(*q->pixels)) {
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size_t new_size = w * h * sizeof(quirc_pixel_t);
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quirc_pixel_t *new_pixels = realloc(q->pixels, new_size);
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if (!new_pixels) {
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free(new_image);
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return -1;
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}
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q->pixels = new_pixels;
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}
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q->image = new_image;
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q->w = w;
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q->h = h;
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return 0;
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}
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int quirc_count(const struct quirc *q)
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{
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return q->num_grids;
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}
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static const char *const error_table[] = {
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[QUIRC_SUCCESS] = "Success",
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[QUIRC_ERROR_INVALID_GRID_SIZE] = "Invalid grid size",
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[QUIRC_ERROR_INVALID_VERSION] = "Invalid version",
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[QUIRC_ERROR_FORMAT_ECC] = "Format data ECC failure",
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[QUIRC_ERROR_DATA_ECC] = "ECC failure",
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[QUIRC_ERROR_UNKNOWN_DATA_TYPE] = "Unknown data type",
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[QUIRC_ERROR_DATA_OVERFLOW] = "Data overflow",
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[QUIRC_ERROR_DATA_UNDERFLOW] = "Data underflow"
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};
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const char *quirc_strerror(quirc_decode_error_t err)
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{
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if (err >= 0 && err < sizeof(error_table) / sizeof(error_table[0]))
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return error_table[err];
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return "Unknown error";
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}
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