54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
/*
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captcha
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Copyright (c) Kopikova Sofia, 2020
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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distribution.
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*/
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#ifndef CAPTCHA_INCLUDED
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#define CAPTCHA_INCLUDED
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enum {
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CAPTCHA_STRING_LENGTH = 10,
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NUM_OF_SEGMENTS = 4
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};
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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*img will contain the captcha PNG as bytes (it is quite small
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-- several KB); it is malloc'ed and must be free'd by
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the caller once the image is no longer needed;
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*imgsize will be filled with count of bytes in img;
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answer must point to a char buffer of at least CAPTCHA_STRING_LENGTH+1
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cells, it will be filled with the captcha answer
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*/
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void generate_captcha(char **img, int *imgsize, char *answer);
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#ifdef __cplusplus
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}
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#endif
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#endif
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