[BUF] more buffer output functions

Author: Diego Ferrari

shared/files/buffer.c

@@ -15,18 +15,42 @@ buffer buffer_create(size_t size, bool can_grow, bool circular){
 void buffer_write(buffer *buf, char* fmt, ...){
     __attribute__((aligned(16))) va_list args;
     va_start(args, fmt); 
+    buffer_write_va(buf, fmt, args);
+    //TODO: circular
+    va_end(args);
+}
+
+void buffer_write_va(buffer *buf, char* fmt, va_list args){
     size_t n = string_format_va_buf(fmt, buf->buffer+buf->cursor, buf->limit-buf->cursor, args);
     buf->cursor += n;
     buf->buffer_size += n;
     if (buf->can_grow && buf->buffer_size > buf->limit-256){
-        size_t new_size = buf->limit;
+        size_t new_size = buf->limit * 2;
         buf->buffer = realloc_sized(buf->buffer, buf->limit, new_size);
         buf->limit = new_size;
     }
-    //TODO: circular
-    va_end(args);
+}
+
+void buffer_write_const(buffer *buf, char *lit){
+    size_t lit_size = strlen(lit);
+    buffer_write_lim(buf, lit, lit_size);
+}
+
+void buffer_write_lim(buffer *buf, char *lit, size_t lit_size){
+    if (buf->limit - buf->buffer_size <= lit_size){
+        if (buf->can_grow){
+            size_t new_size = buf->limit;
+            buf->buffer = realloc_sized(buf->buffer, buf->limit, new_size);
+            buf->limit = new_size;
+        } else return;
+        //TODO: circular
+    }
+    for (size_t i = 0; i < lit_size; i++){
+        buf->buffer[buf->cursor++] = lit[i];
+    }
+    buf->buffer_size += lit_size;
 }
 
 void buffer_write_space(buffer *buf){
-    buffer_write(buf, " ");
+    buffer_write_const(buf, " ");
 }

shared/files/buffer.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include "types.h"
+#include "std/args.h"
 
 typedef struct {
     char* buffer;
@@ -13,4 +14,7 @@ typedef struct {
 
 buffer buffer_create(size_t size, bool can_grow, bool circular);
 void buffer_write(buffer *buf, char* fmt, ...);
+void buffer_write_va(buffer *buf, char* fmt, va_list args);
+void buffer_write_const(buffer *buf, char *lit);
+void buffer_write_lim(buffer *buf, char *lit, size_t size);
 void buffer_write_space(buffer *buf);