123 lines
2.2 KiB
C
123 lines
2.2 KiB
C
#include<stdio.h>
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#include<stdlib.h>
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#include<string.h>
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struct char_ {
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char letter;
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struct char_* next;
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struct char_* prev;
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};
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typedef struct char_ string_char;
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typedef string_char* string;
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string toString(char* str) {
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string_char* last_c = NULL;
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for (int i = strlen(str); i >= 0; i--) {
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string_char* c = malloc(sizeof(string_char));
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c->letter = str[i];
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c->next = last_c;
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if (last_c != NULL) last_c->prev = c;
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last_c = c;
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}
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return last_c;
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}
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char* toCharT(string str) {
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int count = 0;
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string str2 = str;
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while (str2 != NULL) {
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count++;
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str2 = str2->next;
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}
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char* new_str = calloc(sizeof(char), count);
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for (int i = 0; i < count; i++) {
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new_str[i] = str->letter;
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str = str->next;
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}
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return new_str;
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}
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void sputs(string str) {
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while (str != NULL) {
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printf("%c", str->letter);
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str = str->next;
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}
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printf("\n");
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}
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void sfgets(string* str, int maxLength, FILE * stream) {
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char line[2048];
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fgets(line, maxLength, stream);
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*str = toString(line);
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}
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int sstrlen(string str) {
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int count = 0;
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while (str != NULL) {
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count++;
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str = str->next;
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}
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return count - 1;
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}
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void sstrcpy(string* str1, string str2) {
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string_char* last_c = NULL;
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int length = sstrlen(str2);
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while (str2->next != NULL) str2 = str2->next;
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for (int i = length; i >= 0; i--) {
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string_char* c = malloc(sizeof(string_char));
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c->next = last_c;
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c->letter = str2->letter;
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str2 = str2->prev;
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if (last_c != NULL) c->prev = last_c;
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last_c = c;
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}
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*str1 = last_c;
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}
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int sstrcmp(string str1, string str2) {
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while (str1 != NULL || str2 != NULL) {
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if (str1 == NULL && str2 == NULL) break;
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else if (str1 == NULL && str2 != NULL) return -1;
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else if (str1 != NULL && str2 == NULL) return -1;
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else if (str1->letter != str2->letter) return -1;
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str1 = str1->next;
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str2 = str2->next;
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}
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return 0;
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}
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string sstrcat(string* stra, string* strb) {
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string str1 = *stra;
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string str2 = *strb;
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while (str1->next->next != NULL) str1 = str1->next;
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str1->next = str2;
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str2->prev = str1;
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while (str1->prev != NULL) str1 = str1->prev;
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}
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int main(int argc, char * argv[]) {
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string c = toString("Hello World !");
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string d = NULL;
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sstrcpy(&d, c);
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sputs(d);
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sputs(c);
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sstrcat(&d, &c);
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sputs(d);
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return EXIT_SUCCESS;
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}
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