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parseconf.h

/* parseconf.h - state machine-driven dynamic configuration file parser

   Copyright (C) 2002  Russell Kroll <rkroll@exploits.org>

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/

#ifndef PARSECONF_H_SEEN
#define PARSECONF_H_SEEN 1

#ifdef __cplusplus
extern "C" {
#endif

#define PCONF_CTX_t_MAGIC 0x00726630
#define PCONF_ERR_LEN 256

/* conservative defaults: use at most 16 KB for parsing any given line */
#define PCONF_DEFAULT_ARG_LIMIT 32
#define PCONF_DEFAULT_WORDLEN_LIMIT 512

typedef struct {
      FILE  *f;               /* stream to current file     */
      int   state;                  /* current parser state       */
      int   ch;               /* last character read        */
      
      char  **arglist;        /* array of pointers to words */
      size_t      *argsize;         /* list of sizes for realloc  */
      size_t      numargs;          /* max usable in arglist      */
      size_t      maxargs;          /* for reallocing arglist     */

      char  *wordbuf;         /* accumulator for current word     */
      char  *wordptr;         /* where next char goes in word     */
      size_t      wordbufsize;            /* for reallocing wordbuf     */

      int   linenum;          /* for good error reporting   */
      int   error;                  /* set when an error occurred */
      char  errmsg[PCONF_ERR_LEN];  /* local buffer for errors    */

      void  (*errhandler)(const char *);  /* user's error handler */

      int   magic;                  /* buffer validity check      */

      /* these may be redefined by the caller to customize memory use   */
      size_t      arg_limit;        /* halts growth of arglist    */
      size_t      wordlen_limit;          /* halts growth of any wordbuf      */

}     PCONF_CTX_t;

int pconf_init(PCONF_CTX_t *ctx, void errhandler(const char *));
int pconf_file_begin(PCONF_CTX_t *ctx, const char *fn);
int pconf_file_next(PCONF_CTX_t *ctx);
int pconf_parse_error(PCONF_CTX_t *ctx);
int pconf_line(PCONF_CTX_t *ctx, const char *line);
void pconf_finish(PCONF_CTX_t *ctx);
char *pconf_encode(const char *src, char *dest, size_t destsize);
int pconf_char(PCONF_CTX_t *ctx, char ch);

#ifdef __cplusplus
}
#endif

#endif      /* PARSECONF_H_SEEN */

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