Import sources from 2011-03-30 iso image

1 files changed, 130 insertions, 0 deletions

diff --git a/sys/src/cmd/wikifs/parsehist.c b/sys/src/cmd/wikifs/parsehist.c
new file mode 100755
index 000000000..88b49dd7e
--- /dev/null
+++ b/sys/src/cmd/wikifs/parsehist.c
@@ -0,0 +1,130 @@
+/*
+ * 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;
+}
+