44 lines
976 B
C
44 lines
976 B
C
#include "str.h"
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i32 strcopy(char *to, const char *from, u32 length) {
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u32 i;
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if (to == nil || from == nil) return -1;
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if (length == 0) {return 0;}
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for (i = 0; i < length - 1 && from[i] != '\0'; i++) {
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to[i] = from[i];
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}
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to[i] = '\0';
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return 0;
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}
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bool streq(const char *s1, const char *s2) {
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if (s1 == nil && s2 == nil) return true;
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if (s1 == nil || s2 == nil) return false;
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while (*s1 && *s2) {
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if (*s1 != *s2) return false;
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s1++;
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s2++;
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}
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return (*s1 == '\0' && *s2 == '\0');
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}
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u32 strlen(const char *str) {
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u32 i;
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if (str == nil) {return 0;}
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for (i = 0; str[i] != '\0'; i++) {
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; /* twiddle thumbs, 'i' is doing all the work*/
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}
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return i;
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}
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u32 strnlen(const char *str, u32 max_len) {
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u32 i;
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if (str == nil) {return 0;}
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for (i = 0; i < max_len && str[i] != '\0'; i++) {
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; /* twiddle thumbs, 'i' is doing all the work*/
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}
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return i;
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} |