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#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include "read.h"
#include "strbst.h"
#include "nodelink.h"
#include "ll.h"
void consumespaces(FILE* file) {
int c;
while ( ( c = fgetc(file) ) != EOF && c != ' ' );
ungetc(c, file);
}
void wsclean(char* str, size_t sz) { //
bool nl = false;
if (str[sz] == '\n') {
sz--;
nl = true;
}
size_t i;
for (i = sz-1; i >= 0 && str[i] == ' '; i--);
if (nl) {
str[i+1] = '\n';
str[i+2] = 0;
} else {
str[i+1] = 0;
}
}
char* empty(void) {
char* str = malloc(sizeof(char));
*str = 0;
return str;
}
char* line(FILE* file) {
char* link = NULL;
size_t n;
getline(&link, &n, file);
wsclean(link, n);
if (*link == '\n') {
free(link);
link = empty();
}
return link;
}
link* insorget(strbst* tgt, char* name) {
link* get = query(tgt, name);
if (!(*get)) {
get = newlink(newnode());
insbst(tgt, name, get);
}
return get;
}
char* getdesc(FILE* file) {
int c;
size_t sz;
llnode *head, *tail;
head = tail = appendll(NULL, NULL);
while ( (c = getc()) != EOF && c != ':' && c != '-' ) {
tail = tail->next = appendll(tail, line());
sz += strlen(tail->str); // this should be traced but I haven't
}
if (c != EOF) ungetc(c, file);
tail = head->next; free(head);
char *out, *pos;
pos = out = malloc(sizeof(char)*(sz+1)); out[sz] = 0;
while (tail != NULL) {
size_t len = strlen(tail->str);
memcpy(pos, tail->str, len);
pos += len;
llnode* tmp = tail;
tail = tail->next;
free(tmp); free(tmp->str);
}
return pos;
}
node* readfile(char* name) {
FILE* read = fopen(name, "r");
node *root, *cur;
cur = root = newnode();
link* curl = insbst(root->links, name, root);
// getline
while ( ( int c = fgetc(read) ) != EOF ) {
switch (c) {
case ':':
consumespaces(file);
curl = insorget(root->links, line());
cur = curl->to;
break;
case '-':
consumespaces(file);
char* lname = line();
curl = insbst(cur->links, lname,
insorget(root->links, lname)->to);
break;
default:
ungetc(c, read);
curl->desc = getdesc();
break;
}
}
fclose(read);
return root;
}
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