93 lines
1.7 KiB
C
93 lines
1.7 KiB
C
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#include <u.h>
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#include "util.h"
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uvlong hash(char* str) {
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uvlong h;
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uchar* p;
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h = 0;
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for (p = (unsigned char*)str; *p != '\0'; p++)
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h = 37 * h + *p;
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return h; // or, h % ARRAY_SIZE;
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}
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char clca(char c) {
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return c >= 'A' && c <= 'Z' ? c + ('a' - 'A') : c;
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} /* char to lowercase */
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char cuca(char c) {
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return c >= 'a' && c <= 'z' ? c - ('a' - 'A') : c;
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} /* char to uppercase */
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int slen(char* s) {
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int i = 0;
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while (s[i] && s[++i]) {
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;
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}
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return i;
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} /* string length */
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char* st__(char* s, char (*fn)(char)) {
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int i = 0;
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char c;
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while ((c = s[i]))
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s[i++] = fn(c);
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return s;
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}
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char* stuc(char* s) { return st__(s, cuca); } /* string to uppercase */
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char* stlc(char* s) { return st__(s, clca); } /* string to lowercase */
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char* scpy(char* src, char* dst, int len) {
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int i = 0;
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while ((dst[i] = src[i]) && i < len - 2)
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i++;
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dst[i + 1] = '\0';
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return dst;
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} /* string copy */
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int scmp(char* a, char* b) {
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int i = 0;
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while (a[i] == b[i])
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if (!a[i++])
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return 1;
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return 0;
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} /* string compare */
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char* scsw(char* s, char a, char b) {
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int i = 0;
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char c;
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while ((c = s[i]))
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s[i++] = c == a ? b : c;
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return s;
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} /* string char swap */
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char* scat(char* dst, const char* src) {
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char* ptr = dst + slen(dst);
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while (*src)
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*ptr++ = *src++;
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*ptr = '\0';
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return dst;
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} /* string cat */
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int ssin(char* s, char* ss) {
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int a = 0, b = 0;
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while (s[a]) {
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if (s[a] == ss[b]) {
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if (!ss[b + 1])
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return a - b;
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b++;
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} else
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b = 0;
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a++;
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}
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return -1;
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} /* string substring index */
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char* ccat(char* dst, char c) {
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int len = slen(dst);
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dst[len] = c;
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dst[len + 1] = '\0';
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return dst;
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}
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