Added a structure for the cstr wrapper;

include/sexpr/sexp.h

@@ -2,8 +2,13 @@
 @cond IGNORE
 
 ======================================================
+ Original copyrights (before the fork):
  SFSEXP: Small, Fast S-Expression Library version 1.2
  Written by Matthew Sottile (mjsottile@gmail.com)
+ Forked:
+ libsexpr: fork of sfsexp (small and fast s-expression lib)
+ (c) Matthew Sottile <mjsottile@gmail.com> (original author)
+ (c) Alexander Vdolainen <alex@vapaa.xyz> (some extra API additions)
 ======================================================
 
 Copyright (2003-2006). The Regents of the University of California. This
@@ -44,6 +49,8 @@ LA-CC-04-094
 #include "sexp_memory.h"
 #include "sexp_errors.h"
 
+#define CSTRBUFSIZ  512
+
 /* doxygen documentation groups defined here */
 
 /**
@@ -560,6 +567,15 @@ typedef struct sexp_iowrap {
   size_t cnt;
 } sexp_iowrap_t;
 
+/* TODO: doxygen? more doxygen */
+typedef struct sexp_cstrwrap {
+  pcont_t *cc;
+  const char *seval;
+  size_t rl, cnt;
+  size_t sln;
+  char buf[CSTRBUFSIZ];
+} sexp_cstrwrap_t;
+
 /*========*/
 /* GLOBAL */
 /*========*/