131 lines
2.2 KiB
C
131 lines
2.2 KiB
C
#ifndef STRING_H
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#define STRING_H
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#include <stddef.h>
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#include <stdlib.h>
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extern void *memcpy(void *dest, const void *src, size_t n);
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extern void *memmove(void *dest, const void *src, size_t n);
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extern void *memset(void *s, int c, size_t n);
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extern int memcmp(const void *s1, const void *s2, size_t n);
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extern int sprintf(char * buf, const char *fmt, ...);
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// yes, linux has fancy ones. We don't care. This stuff gets used
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// hardly at all. And the pain of including those files is just too high.
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//extern inline void strcpy(char *dst, char *src) {while (*src) *dst++ = *src++;}
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//extern inline int strlen(char *src) { int i = 0; while (*src++) i++; return i;}
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static inline size_t strnlen(const char *src, size_t max)
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{
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size_t i = 0;
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while((*src++) && (i < max)) {
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i++;
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}
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return i;
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}
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static inline size_t strlen(const char *src)
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{
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size_t i = 0;
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while(*src++) {
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i++;
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}
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return i;
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}
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static inline char *strchr(const char *s, int c)
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{
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for (; *s; s++) {
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if (*s == c)
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return (char *) s;
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}
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return 0;
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}
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static inline char *strdup(const char *s)
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{
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size_t sz = strlen(s) + 1;
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char *d = malloc(sz);
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memcpy(d, s, sz);
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return d;
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}
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static inline char *strncpy(char *to, const char *from, int count)
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{
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register char *ret = to;
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while (count > 0) {
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count--;
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if ((*to++ = *from++) == '\0')
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break;
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}
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while (count > 0) {
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count--;
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*to++ = '\0';
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}
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return ret;
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}
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static inline int strcmp(const char *s1, const char *s2)
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{
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int r;
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while ((r = (*s1 - *s2)) == 0 && *s1) {
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s1++;
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s2++;
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}
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return r;
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}
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static inline int isspace(int c)
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{
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switch (c) {
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case ' ': case '\f': case '\n':
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case '\r': case '\t': case '\v':
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return 1;
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default:
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return 0;
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}
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}
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static inline int isdigit(int c)
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{
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return (c >= '0' && c <= '9');
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}
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static inline int isxdigit(int c)
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{
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return ((c >= '0' && c <= '9') ||
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(c >= 'a' && c <= 'f') ||
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(c >= 'A' && c <= 'F'));
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}
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static inline int isupper(int c)
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{
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return (c >= 'A' && c <= 'Z');
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}
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static inline int islower(int c)
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{
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return (c >= 'a' && c <= 'z');
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}
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static inline int toupper(int c)
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{
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if (islower(c))
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c -= 'a'-'A';
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return c;
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}
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static inline int tolower(int c)
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{
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if (isupper(c))
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c -= 'A'-'a';
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return c;
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}
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#endif /* STRING_H */
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