92 lines
3.3 KiB
C
92 lines
3.3 KiB
C
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/*---
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This software is copyrighted by the Regents of the University of
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California, and other parties. The following terms apply to all files
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associated with the software unless explicitly disclaimed in
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individual files.
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The authors hereby grant permission to use, copy, modify, distribute,
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and license this software and its documentation for any purpose,
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provided that existing copyright notices are retained in all copies
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and that this notice is included verbatim in any distributions. No
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written agreement, license, or royalty fee is required for any of the
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authorized uses. Modifications to this software may be copyrighted by
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their authors and need not follow the licensing terms described here,
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provided that the new terms are clearly indicated on the first page of
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each file where they apply.
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IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY PARTY
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FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION, OR ANY
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DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
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NON-INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, AND
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THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
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MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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GOVERNMENT USE: If you are acquiring this software on behalf of the
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U.S. government, the Government shall have only "Restricted Rights" in
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the software and related documentation as defined in the Federal
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Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2). If you are
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acquiring the software on behalf of the Department of Defense, the
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software shall be classified as "Commercial Computer Software" and the
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Government shall have only "Restricted Rights" as defined in Clause
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252.227-7013 (c) (1) of DFARs. Notwithstanding the foregoing, the
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authors grant the U.S. Government and others acting in its behalf
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permission to use and distribute the software in accordance with the
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terms specified in this license.
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---*/
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#include <stdlib.h>
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#include <string.h>
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#define SEED 0
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char *LONG_STRING;
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int LONG_STRING_LENGTH;
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void rand_str_init() {
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char c;
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char first_printable_ascii = ' ';
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char last_printable_ascii = '~';
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LONG_STRING_LENGTH = (int)(last_printable_ascii - first_printable_ascii);
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LONG_STRING = (char *)malloc(sizeof(char) * LONG_STRING_LENGTH);
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for (c = 0; c < LONG_STRING_LENGTH; c++) {
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LONG_STRING[(int)c] = first_printable_ascii + c;
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}
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srand(SEED);
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}
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char *rand_str() {
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char *string;
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double r;
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int start = 0;
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int end = 0;
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while (start == end) {
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r = ((double)rand()/(double)((double)RAND_MAX+1)); /* returns [0, 1)*/
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r = r*LONG_STRING_LENGTH;
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start = (int)r; /* an int in the rand [0, length) */
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r = ((double)rand()/(double)((double)RAND_MAX+1)); /* re turns [0, 1)*/
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r = r*LONG_STRING_LENGTH;
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end = (int)r; /* an int in the rand [0, length) */
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}
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if (end < start) {
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int swap = start;
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start = end;
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end = swap;
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}
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string = (char *)malloc(sizeof(char) * (end - start) + 1);
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strncpy(string, LONG_STRING + start, end-start);
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string[end-start] = '\0'; /* make the string null terminated */
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return string;
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}
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