Follow Techotopia on Twitter

On-line Guides
All Guides
eBook Store
iOS / Android
Linux for Beginners
Office Productivity
Linux Installation
Linux Security
Linux Utilities
Linux Virtualization
Linux Kernel
System/Network Admin
Programming
Scripting Languages
Development Tools
Web Development
GUI Toolkits/Desktop
Databases
Mail Systems
openSolaris
Eclipse Documentation
Techotopia.com
Virtuatopia.com

How To Guides
Virtualization
General System Admin
Linux Security
Linux Filesystems
Web Servers
Graphics & Desktop
PC Hardware
Windows
Problem Solutions
Privacy Policy

  




 

 

Back: builtin.c & builtin.h
Forward: syntax.c & syntax.h
 
FastBack: syntax.c & syntax.h
Up: Library Implementation
FastForward: Beginnings of a configure.in for Small Project
Top: Autoconf, Automake, and Libtool
Contents: Table of Contents
Index: Index
About: About this document

9.2.2.3 `eval.c' & `eval.h'

Having created a Sic parser, and populated it with some Builtin handlers, a user of this library must tokenize and evaluate its input stream. These files define a structure for storing tokenized strings (Tokens), and functions for converting char * strings both to and from this structure type:

 
#ifndef SIC_EVAL_H
#define SIC_EVAL_H 1

#include <sic/common.h>
#include <sic/sic.h>

BEGIN_C_DECLS

typedef struct {
  int  argc;            /* number of elements in ARGV */
  char **argv;          /* array of pointers to elements */
  size_t lim;           /* number of bytes allocated */
} Tokens;

extern int eval       (Sic *sic, Tokens *tokens);
extern int untokenize (Sic *sic, char **pcommand, Tokens *tokens);
extern int tokenize   (Sic *sic, Tokens **ptokens, char **pcommand);

END_C_DECLS

#endif /* !SIC_EVAL_H */

These files also define the eval function, which examines a Tokens structure in the context of the given Sic parser, dispatching the argv array to a relevant Builtin handler, also written by the library user.


This document was generated by Gary V. Vaughan on February, 8 2006 using texi2html

 
 
  Published under the terms of the Open Publication License Design by Interspire