From 4ab00506b3840d073b127733ab871e6a8bcbaec6 Mon Sep 17 00:00:00 2001
From: Holden Rohrer <hr@hrhr.dev>
Date: Mon, 30 Mar 2020 13:28:07 -0400
Subject: all around bugfixes on buf.c

---
 buf.c | 24 ++++++++++--------------
 1 file changed, 10 insertions(+), 14 deletions(-)

diff --git a/buf.c b/buf.c
index a485708..df35d0f 100644
--- a/buf.c
+++ b/buf.c
@@ -34,9 +34,9 @@ buf* newbuf(size_t cap){
 
 size_t buflen(buf* buffer){
     buf_node* cur = buffer->tail;
-    size_t size = buffer->ins-buffer->pop+buffer->cap;
+    size_t size = buffer->ins-buffer->pop;
     while (cur != buffer->head) {
-        cur = cur->next; // skips one iter        ^^^
+        cur = cur->next;
         size += buffer->cap;
     };
     return size;
@@ -74,8 +74,8 @@ char* popstrbuf(buf* buffer, size_t ct){
 
 void inschrbuf(buf* buffer, char chr){
     if (buffer->ins == buffer->cap) extendbuf(buffer);
-    buffer->cap++;
-    buffer->head->text[buffer->cap-1] = chr;
+    buffer->ins++;
+    buffer->head->text[buffer->ins-1] = chr;
 }
 void insstrbuf(buf* buffer, char* str){
     size_t len = strlen(str);
@@ -93,17 +93,13 @@ char* peekstrbuf(buf* buffer, size_t loc, size_t len){
     char* str = malloc(sizeof(char)*(len+1)); str[len] = 0;
     buf_node* start;
 
-    loc += buffer->ins;
-    for (start = buffer->tail; loc>0;
-            loc -= buffer->cap)
+    loc += buffer->pop;
+    for (start = buffer->tail; loc>buffer->cap; loc -= buffer->cap)
         start = start->next; // start,loc is where one starts streaming
-    if (len > buffer->cap){
-        memcpy(str, start->text+loc, buffer->cap-loc);
-        len -= buffer->cap - loc;
+    while (len > 0){
+        memcpy(str, start->text+loc, min(buffer->cap-loc, len));
+        len -= min(buffer->cap - loc, len);
+        loc = 0;
     }
-    for (; len > buffer->cap; len -= buffer->cap ){
-        memcpy(str, start->text, buffer->cap);
-    }
-    memcpy(str, start->text, len);
     return str;
 }
-- 
cgit