1 /* 2 * This file is licensed under the GPL license. For the full content 3 * of this license, see the COPYING file at the top level of this 4 * source tree. 5 */ 6 7 /* 8 * assertion: 9 * The function will compute the number of bytes in the string to which s points, 10 * not including the terminating NUL character. and will return the length of s. 11 * 12 * method: 13 * -Generate sample string s1 of variable lengths in a loop. 14 * -Use strlen() for generated strings and check whether return value is as expected. 15 * 16 */ 17 18 #include <stdio.h> 19 #include <string.h> 20 #include <stdlib.h> 21 #include <unistd.h> 22 #include <time.h> 23 #include "posixtest.h" 24 25 #define STRING_MAX_LEN 50000 26 #define STEP_COUNT 2000 27 #define TNAME "strlen/1-1.c" 28 29 char *random_string(int len) 30 { 31 int i; 32 char *output_string; 33 output_string = malloc(len + 1); 34 if (output_string == NULL) { 35 printf(" Failed to allocate memory\n"); 36 exit(PTS_UNRESOLVED); 37 } 38 for (i = 0; i < len; i++) 39 output_string[i] = rand() % 254 + 1; 40 output_string[len] = '\0'; 41 return output_string; 42 } 43 44 int main(void) 45 { 46 char *ret_str; 47 int i; 48 size_t obtained_len; 49 50 for (i = 0; i < STRING_MAX_LEN; i += STEP_COUNT) { 51 ret_str = random_string(i); 52 obtained_len = strlen(ret_str); 53 54 if (obtained_len != i) { 55 printf(TNAME " Test Failed, return value is not as expected, " 56 "for the given string. Expected string length: %d," 57 " But got: %zu.\n", i, obtained_len); 58 exit(PTS_FAIL); 59 } 60 free(ret_str); 61 } 62 printf(TNAME " Test Passed, strlen() return value is as expected, " 63 "for the given strings.\n"); 64 exit(PTS_PASS); 65 } 66
