scc

simple c99 compiler
git clone git://git.simple-cc.org/scc
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0019-strncat.c (830B)


      1 #include <assert.h>
      2 #include <stdio.h>
      3 #include <string.h>
      4 
      5 /*
      6 output:
      7 testing
      8 test1
      9 test2
     10 test3
     11 test4
     12 test5
     13 done
     14 end:
     15 */
     16 
     17 int
     18 main()
     19 {
     20 	char *s, buf[40], buf2[40];
     21 
     22 	puts("testing");
     23 
     24 	puts("test1");
     25 	strcpy(buf, "01234");
     26 	s = strncat(buf, "567", 8);
     27 	assert(s == buf);
     28 	assert(!strcmp(s, "01234567"));
     29 
     30 	puts("test2");
     31 	strcpy(buf, "01234");
     32 	s = strncat(buf, "567", 2);
     33 	assert(s == buf);
     34 	assert(!strcmp(s, "0123456"));
     35 
     36 	puts("test3");
     37 	strcpy(buf, "01234");
     38 	memcpy(buf2, "567", 3);
     39 	s = strncat(buf, buf2, 3);
     40 	assert(s == buf);
     41 	assert(!strcmp(s, "01234567"));
     42 
     43 	puts("test4");
     44 	strcpy(buf, "01234");
     45 	s = strncat(buf, "", 7);
     46 	assert(s == buf);
     47 	assert(!strcmp(s, "01234"));
     48 
     49 	puts("test5");
     50 	strcpy(buf, "01234");
     51 	s = strncat(buf, "", 0);
     52 	assert(s == buf);
     53 	assert(!strcmp(s, "01234"));
     54 
     55 	puts("done");
     56 
     57 	return 0;
     58 }