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MyString.c
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MyString.c
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#include "MyString.h"
MyString *new_string() {
MyString *mstr = (MyString *)malloc(sizeof(MyString));
mstr->str = (char *)malloc(STRING_ALLOC_SIZE);
mstr->str[0] = '\0';
mstr->length = 0;
mstr->buff_length = STRING_ALLOC_SIZE;
return mstr;
}
void free_string(MyString *mstr) {
if (mstr) {
free(mstr->str);
free(mstr);
}
}
size_t my_strlen(MyString *mstr) {
return mstr->length;
}
void resize_string(MyString *mstr, size_t size) {
if (size > mstr->buff_length) {
mstr->buff_length = (size / STRING_ALLOC_SIZE + 1) * STRING_ALLOC_SIZE * 2;
mstr->str = (char *)realloc(mstr->str, mstr->buff_length);
}
}
char *my_strcat(MyString *mstr, const char *str) {
size_t len = mstr->length + strlen(str);
resize_string(mstr, len + 1);
strcpy(mstr->str + mstr->length, str);
mstr->length = len;
return mstr->str;
}
char *my_strncat(MyString *mstr, const char *str, size_t n) {
size_t len = mstr->length + n;
resize_string(mstr, len + 1);
strncpy(mstr->str + mstr->length, str, n);
mstr->length = len;
return mstr->str;
}
char *my_chrcat(MyString *mstr, const char c) {
resize_string(mstr, mstr->length + 2);
mstr->str[mstr->length++] = c;
mstr->str[mstr->length] = '\0';
return mstr->str;
}
char *my_strcat2str(MyString *mstr, const char *str, const char *end_str) {
char *end = strstr(str, end_str);
if (end != NULL) {
// end += strlen(end_str);
return my_strcat2ptr(mstr, str, end);
}
return (char *)mstr->str;
}
char *my_strcat2chr(MyString *mstr, const char *str, const char endc) {
char *end = strchr(str, endc);
if (end != NULL) {
// end++;
return my_strcat2ptr(mstr, str, end);
}
return (char *)mstr->str;
}
char *my_strcat2ptr(MyString *mstr, const char *str, const char *endp) {
size_t cat_len = endp - str - 1;
if (cat_len > 0) {
my_strncat(mstr, str, cat_len);
}
return (char *)mstr->str;
}