Subversion Repositories planix.SVN

/*
 * Read a Wiki history file.
 * It's a title line then a sequence of Wiki files separated by headers.
 *
 * Ddate/time
 * #body
 * #...
 * #...
 * #...
 * etc.
 */

#include <u.h>
#include <libc.h>
#include <bio.h>
#include <String.h>
#include <thread.h>
#include "wiki.h"

static char*
Brdwline(void *vb, int sep)
{
        Biobufhdr *b;
        char *p;

        b = vb;
        if(Bgetc(b) == '#'){
                if(p = Brdline(b, sep))
                        p[Blinelen(b)-1] = '\0';
                return p;
        }else{
                Bungetc(b);
                return nil;     
        }
}

Whist*
Brdwhist(Biobuf *b)
{
        int i, current, conflict, c, n;
        char *author, *comment, *p, *title;
        ulong t;
        Wdoc *w;
        Whist *h;

        if((p = Brdline(b, '\n')) == nil){
                werrstr("short read: %r");
                return nil;
        }

        p[Blinelen(b)-1] = '\0';
        p = strcondense(p, 1);
        title = estrdup(p);

        w = nil;
        n = 0;
        t = -1;
        author = nil;
        comment = nil;
        conflict = 0;
        current = 0;
        while((c = Bgetc(b)) != Beof){
                if(c != '#'){
                        p = Brdline(b, '\n');
                        if(p == nil)
                                break;
                        p[Blinelen(b)-1] = '\0';

                        switch(c){
                        case 'D':
                                t = strtoul(p, 0, 10);
                                break;
                        case 'A':
                                free(author);
                                author = estrdup(p);
                                break;
                        case 'C':
                                free(comment);
                                comment = estrdup(p);
                                break;
                        case 'X':
                                conflict = 1;
                        }
                } else {        /* c=='#' */
                        Bungetc(b);
                        if(n%8 == 0)
                                w = erealloc(w, (n+8)*sizeof(w[0]));
                        w[n].time = t;
                        w[n].author = author;
                        w[n].comment = comment;
                        comment = nil;
                        author = nil;
                        w[n].wtxt = Brdpage(Brdwline, b);
                        w[n].conflict = conflict;
                        if(w[n].wtxt == nil)
                                goto Error;
                        if(!conflict)
                                current = n;
                        n++;
                        conflict = 0;
                        t = -1;
                }
        }
        if(w==nil)
                goto Error;

        free(comment);
        free(author);
        h = emalloc(sizeof *h);
        h->title = title;
        h->doc = w;
        h->ndoc = n;
        h->current = current;
        incref(h);
        setmalloctag(h, getcallerpc(&b));
        return h;

Error:
        free(title);
        free(author);
        free(comment);
        for(i=0; i<n; i++){
                free(w[i].author);
                free(w[i].comment);
                freepage(w[i].wtxt);
        }
        free(w);
        return nil;
}