asmsh/src/shell_sym.h

/* Copyright Yann Weber <asmsh@yannweb.net>
   This file is part of asmsh.

   asmsh 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 3 of the License, or any later version.
   
   asmsh 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 asmsh. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef ASMSH_SHELL_ENV_H
#define ASMSH_SHELL_ENV_H
#include "config.h"

#include <unistd.h>
#include <stdlib.h>
#include <string.h>

#define ASMSH_VARNAME_MAX 256
#define ASMSH_SYMALLOC 64

/** The symbol prefixing a label */
#define ASMSH_LABEL_SYM '@'

typedef struct asmsh_sym_s asmsh_sym_t;
typedef struct asmsh_symtable_s asmsh_symtable_t;

struct asmsh_sym_s
{
	char name[ASMSH_VARNAME_MAX + 1];
	unsigned long addr;
};

/** Stores the list of symbols associated with their address/value
 *
 * @note Symboles are ordered by name, ascending
 */
struct asmsh_symtable_s
{
	asmsh_sym_t *syms;
	size_t syms_sz;
	size_t alloc;
};

/** if freeval value given to add are freed on clean */
int asmsh_symtable_init(asmsh_symtable_t *table);
void asmsh_symtable_clean(asmsh_symtable_t *table);

/**
 * @return 1 on update 0 on added -1 on error */
int asmsh_symtable_add(asmsh_symtable_t *table, const char *name, unsigned long val);
/**
 * @return 0 on deleted, 1 on not found, -1 on error */
int asmsh_symtable_del(asmsh_symtable_t *table, const char *name);
/**
 * @return NULL on error or not found else a ref */
const asmsh_sym_t *asmsh_symtable_get(asmsh_symtable_t *table, const char *name);

#include "shell.h"

#endif