187 lines
2.5 KiB
C
187 lines
2.5 KiB
C
#include <assert.h>
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#include <ctype.h>
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#include <rules.h>
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#include <string.h>
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#include <stddef.h>
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#include <stdlib.h>
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char *strdup(const char *s)
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{
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if (!ENV_RAMSTAGE)
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dead_code(); /* This can't be used without malloc(). */
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size_t sz = strlen(s) + 1;
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char *d = malloc(sz);
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if (d)
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memcpy(d, s, sz);
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return d;
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}
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char *strconcat(const char *s1, const char *s2)
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{
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if (!ENV_RAMSTAGE)
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dead_code(); /* This can't be used without malloc(). */
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size_t sz_1 = strlen(s1);
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size_t sz_2 = strlen(s2);
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char *d = malloc(sz_1 + sz_2 + 1);
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if (d) {
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memcpy(d, s1, sz_1);
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memcpy(d + sz_1, s2, sz_2 + 1);
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}
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return d;
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}
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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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return i;
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}
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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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return i;
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}
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char *strchr(const char *s, int c)
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{
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do {
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if (*s == c)
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return (char *)s;
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} while (*s++);
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return NULL;
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}
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char *strrchr(const char *s, int c)
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{
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char *p = NULL;
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do {
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if (*s == c)
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p = (char *)s;
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} while (*s++);
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return p;
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}
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char *strncpy(char *to, const char *from, int count)
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{
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char *ret = to;
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char data;
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while (count > 0) {
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count--;
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data = *from++;
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*to++ = data;
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if (data == '\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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char *strcpy(char *dst, const char *src)
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{
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char *ptr = dst;
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while (*src)
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*dst++ = *src++;
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*dst = '\0';
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return ptr;
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}
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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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int strncmp(const char *s1, const char *s2, int maxlen)
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{
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int i;
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for (i = 0; i < maxlen; i++) {
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if ((s1[i] != s2[i]) || (s1[i] == '\0'))
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return s1[i] - s2[i];
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}
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return 0;
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}
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unsigned int skip_atoi(char **s)
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{
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unsigned int i = 0;
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while (isdigit(**s))
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i = i*10 + *((*s)++) - '0';
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return i;
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}
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int strspn(const char *str, const char *spn)
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{
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int ret = 0;
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while (*str != 0) {
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const char *p;
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for (p = spn; *str != *p; p++)
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if (*p == '\0')
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return ret;
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ret++;
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str++;
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}
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return ret;
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}
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int strcspn(const char *str, const char *spn)
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{
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int ret = 0;
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while (*str != 0) {
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const char *p;
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for (p = spn; *p != '\0'; p++)
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if (*p == *str)
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return ret;
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ret++;
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str++;
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}
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return ret;
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}
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long atol(const char *str)
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{
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long ret = 0;
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long sign = 1;
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str += strspn(str, " \t\n\r\f\v");
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if (*str == '+') {
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sign = 1;
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str++;
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} else if (*str == '-') {
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sign = -1;
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str++;
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}
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while (isdigit(*str)) {
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ret *= 10;
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ret += *str++ - '0';
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}
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return ret * sign;
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}
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