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1 #include "printf.h"
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2
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3 #include <stdint.h>
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4 #include <stdlib.h>
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5 #include <string.h>
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6 #include <limits.h>
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7 #include <float.h>
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8
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9 /* This is a smaller buffer size than test.h needs, because we want to test
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10 * NUL-terminating behavior. */
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11 #define BUFSZ 128
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12
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13 int test_snprintf(void)
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14 {
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15 int n1, n2, b1, b2;
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16 char s1[BUFSZ], s2[BUFSZ];
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17
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18 b1 = my_snprintf(NULL, 0,
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19 #include "test.h"
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20 );
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21 if (b1 < 0) {
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22 fprintf(stderr, "my_snprintf(NULL, 0, ...): %s\n", my_strerror(b1));
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23 return -1;
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24 }
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25
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26 b2 = snprintf(NULL, 0,
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27 #include "test.h"
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28 );
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29 if (b2 < 0) {
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30 perror("snprintf(NULL, 0, ...)");
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31 return -1;
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32 }
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33
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34 if (b1 != b2) {
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35 fprintf(stderr, "snprintf and my_snprintf returned different buffer sizes!\n");
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36 return -1;
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37 }
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38
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39 n1 = my_snprintf(s1, BUFSZ,
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40 #include "test.h"
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41 );
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42 if (n1 < 0) {
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43 fprintf(stderr, "my_snprintf: %s\n", my_strerror(n1));
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44 return -1;
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45 }
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46 n2 = snprintf(s2, BUFSZ,
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47 #include "test.h"
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48 );
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49 if (n2 < 0) {
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50 my_free(s1);
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51 perror("snprintf");
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52 return -1;
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53 }
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54
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55 if (n1 != b1) {
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56 fprintf(stderr, "my_snprintf with and without a buffer returned different results\n");
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57 return -1;
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58 }
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59
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60 if (n1 != n2) {
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61 printf("snprintf and my_snprintf returned different buffer sizes\n");
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62 return -1;
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63 }
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64
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65 if (strcmp(s1, s2)) {
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66 fprintf(stderr, "Got different results!!\n");
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67 fprintf(stderr, " snprintf: %s", s1);
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68 fprintf(stderr, " my_snprintf: %s", s2);
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69
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70 return -1;
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71 }
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72
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73 return 0;
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74 }
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