avrdude/src/config.c

397 lines
7.2 KiB
C
Raw Normal View History

/*
* avrdude - A Downloader/Uploader for AVR device programmers
* Copyright (C) 2000-2004 Brian S. Dean <bsd@bsdhome.com>
*
* 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, see <http://www.gnu.org/licenses/>.
*/
/* $Id$ */
#include "ac_cfg.h"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include "avrdude.h"
#include "libavrdude.h"
#include "config.h"
#include "config_gram.h"
char default_programmer[MAX_STR_CONST];
char default_parallel[PATH_MAX];
char default_serial[PATH_MAX];
char default_spi[PATH_MAX];
double default_bitclock;
char string_buf[MAX_STR_CONST];
char *string_buf_ptr;
LISTID string_list;
LISTID number_list;
PROGRAMMER * current_prog;
AVRPART * current_part;
AVRMEM * current_mem;
LISTID part_list;
LISTID programmers;
Alias keyword (#868) Implementation for an "alias" keyword. By now, only applied inside memory descriptions. * Make "mem_alias" a separate nonterminal. The previous implementation attempt caused a syntax error in yacc code, and separating mem_alias on the same level as mem_spec appears to be the cleaner solution anyway. * Maintain real memory aliases. Instead of duplicating the aliased memory with a new name, maintain a second list of memory aliases (per device) that contains a pointer to the memory area it is aliased to. That way, a memory name can be clearly distinguished between the canonical one and any aliases. * Check p->mem_alias != NULL before touching it * Add avr_find_memalias() This takes a memory region as input, and searches whether an alias can be found for it. * We need to add a list structure for the mem_alias list, always. By that means, mem_alias won't ever be NULL, so no need to check later. Also, in avr_dup_part(), duplicate the alias list. * In a memory alias, actually remember the current name. * In avr_dup_part(), adjust pointers of aliased memories While walking the list of memories, for each entry, see if there is an alias pointing to it. If so, allocate a duplicated one, and fix its aliased_mem pointer to point to the duplicated memory region instead of the original one. * Add avr_locate_mem_noalias() When looking whether any memory region has already been defined for the current part while parsing the config file, only non-aliased names must be considered. Otherwise, a newly defined alias would kick out the memory definition it is being aliased to. * When defining a mem_alias, drop any existing one of that name. * Actually use avr_find_memalias() to find aliases * Add declaration for avr_find_memalias() * When defining a memory, also search for an existing alias If the newly defined name has the same as an existing alias, the alias can be removed. Note that we do explicitly *not* remove any memory by the same name of a later defined alias, as this might invalidate another alias'es pointer. If someone defines that, the alias name just won't ever be found by avr_locate_mem().
2022-02-10 19:39:19 +00:00
bool is_alias;
int cfg_lineno;
char * cfg_infile;
extern char * yytext;
#define DEBUG 0
void cleanup_config(void)
{
ldestroy_cb(part_list, (void(*)(void*))avr_free_part);
ldestroy_cb(programmers, (void(*)(void*))pgm_free);
ldestroy_cb(string_list, (void(*)(void*))free_token);
ldestroy_cb(number_list, (void(*)(void*))free_token);
}
int init_config(void)
{
string_list = lcreat(NULL, 0);
number_list = lcreat(NULL, 0);
current_prog = NULL;
current_part = NULL;
current_mem = NULL;
part_list = lcreat(NULL, 0);
programmers = lcreat(NULL, 0);
Alias keyword (#868) Implementation for an "alias" keyword. By now, only applied inside memory descriptions. * Make "mem_alias" a separate nonterminal. The previous implementation attempt caused a syntax error in yacc code, and separating mem_alias on the same level as mem_spec appears to be the cleaner solution anyway. * Maintain real memory aliases. Instead of duplicating the aliased memory with a new name, maintain a second list of memory aliases (per device) that contains a pointer to the memory area it is aliased to. That way, a memory name can be clearly distinguished between the canonical one and any aliases. * Check p->mem_alias != NULL before touching it * Add avr_find_memalias() This takes a memory region as input, and searches whether an alias can be found for it. * We need to add a list structure for the mem_alias list, always. By that means, mem_alias won't ever be NULL, so no need to check later. Also, in avr_dup_part(), duplicate the alias list. * In a memory alias, actually remember the current name. * In avr_dup_part(), adjust pointers of aliased memories While walking the list of memories, for each entry, see if there is an alias pointing to it. If so, allocate a duplicated one, and fix its aliased_mem pointer to point to the duplicated memory region instead of the original one. * Add avr_locate_mem_noalias() When looking whether any memory region has already been defined for the current part while parsing the config file, only non-aliased names must be considered. Otherwise, a newly defined alias would kick out the memory definition it is being aliased to. * When defining a mem_alias, drop any existing one of that name. * Actually use avr_find_memalias() to find aliases * Add declaration for avr_find_memalias() * When defining a memory, also search for an existing alias If the newly defined name has the same as an existing alias, the alias can be removed. Note that we do explicitly *not* remove any memory by the same name of a later defined alias, as this might invalidate another alias'es pointer. If someone defines that, the alias name just won't ever be found by avr_locate_mem().
2022-02-10 19:39:19 +00:00
is_alias = false;
cfg_lineno = 1;
cfg_infile = NULL;
return 0;
}
int yywrap()
{
return 1;
}
int yyerror(char * errmsg, ...)
{
va_list args;
char message[512];
va_start(args, errmsg);
vsnprintf(message, sizeof(message), errmsg, args);
avrdude_message(MSG_INFO, "%s: error at %s:%d: %s\n", progname, cfg_infile, cfg_lineno, message);
va_end(args);
return 0;
}
int yywarning(char * errmsg, ...)
{
va_list args;
char message[512];
va_start(args, errmsg);
vsnprintf(message, sizeof(message), errmsg, args);
avrdude_message(MSG_INFO, "%s: warning at %s:%d: %s\n", progname, cfg_infile, cfg_lineno, message);
va_end(args);
return 0;
}
TOKEN * new_token(int primary)
{
TOKEN * tkn;
tkn = (TOKEN *)malloc(sizeof(TOKEN));
if (tkn == NULL) {
yyerror("new_token(): out of memory");
return NULL;
}
memset(tkn, 0, sizeof(TOKEN));
tkn->primary = primary;
return tkn;
}
void free_token(TOKEN * tkn)
{
if (tkn) {
switch (tkn->value.type) {
case V_STR:
if (tkn->value.string)
free(tkn->value.string);
tkn->value.string = NULL;
break;
}
free(tkn);
}
}
void free_tokens(int n, ...)
{
TOKEN * t;
va_list ap;
va_start(ap, n);
while (n--) {
t = va_arg(ap, TOKEN *);
free_token(t);
}
va_end(ap);
}
TOKEN * number(char * text)
{
struct token_t * tkn;
tkn = new_token(TKN_NUMBER);
if (tkn == NULL) {
return NULL; /* yyerror already called */
}
tkn->value.type = V_NUM;
tkn->value.number = atoi(text);
#if DEBUG
avrdude_message(MSG_INFO, "NUMBER(%d)\n", tkn->value.number);
#endif
return tkn;
}
TOKEN * number_real(char * text)
{
struct token_t * tkn;
tkn = new_token(TKN_NUMBER);
tkn->value.type = V_NUM_REAL;
tkn->value.number_real = atof(text);
#if DEBUG
avrdude_message(MSG_INFO, "NUMBER(%g)\n", tkn->value.number_real);
#endif
return tkn;
}
TOKEN * hexnumber(char * text)
{
struct token_t * tkn;
char * e;
tkn = new_token(TKN_NUMBER);
if (tkn == NULL) {
return NULL; /* yyerror already called */
}
tkn->value.type = V_NUM;
tkn->value.number = strtoul(text, &e, 16);
if ((e == text) || (*e != 0)) {
yyerror("can't scan hex number \"%s\"", text);
free_token(tkn);
return NULL;
}
#if DEBUG
avrdude_message(MSG_INFO, "HEXNUMBER(%g)\n", tkn->value.number);
#endif
return tkn;
}
TOKEN * string(char * text)
{
struct token_t * tkn;
int len;
tkn = new_token(TKN_STRING);
if (tkn == NULL) {
return NULL; /* yyerror already called */
}
len = strlen(text);
tkn->value.type = V_STR;
tkn->value.string = (char *) malloc(len+1);
if (tkn->value.string == NULL) {
yyerror("string(): out of memory");
free_token(tkn);
return NULL;
}
strcpy(tkn->value.string, text);
#if DEBUG
avrdude_message(MSG_INFO, "STRING(%s)\n", tkn->value.string);
#endif
return tkn;
}
TOKEN * keyword(int primary)
{
struct token_t * tkn;
tkn = new_token(primary);
return tkn;
}
void print_token(TOKEN * tkn)
{
if (!tkn)
return;
avrdude_message(MSG_INFO, "token = %d = ", tkn->primary);
switch (tkn->value.type) {
case V_NUM:
avrdude_message(MSG_INFO, "NUMBER, value=%d", tkn->value.number);
break;
case V_NUM_REAL:
avrdude_message(MSG_INFO, "NUMBER, value=%g", tkn->value.number_real);
break;
case V_STR:
avrdude_message(MSG_INFO, "STRING, value=%s", tkn->value.string);
break;
default:
avrdude_message(MSG_INFO, "<other>");
break;
}
avrdude_message(MSG_INFO, "\n");
}
void pyytext(void)
{
#if DEBUG
avrdude_message(MSG_INFO, "TOKEN: \"%s\"\n", yytext);
#endif
}
char * dup_string(const char * str)
{
char * s;
s = strdup(str);
if (s == NULL) {
yyerror("dup_string(): out of memory");
return NULL;
}
return s;
}
#ifdef HAVE_YYLEX_DESTROY
/* reset lexer and free any allocated memory */
extern int yylex_destroy(void);
#endif
int read_config(const char * file)
{
FILE * f;
int r;
if(!(cfg_infile = realpath(file, NULL))) {
avrdude_message(MSG_INFO, "%s: can't determine realpath() of config file \"%s\": %s\n",
progname, file, strerror(errno));
return -1;
}
f = fopen(cfg_infile, "r");
if (f == NULL) {
avrdude_message(MSG_INFO, "%s: can't open config file \"%s\": %s\n",
progname, cfg_infile, strerror(errno));
free(cfg_infile);
cfg_infile = NULL;
return -1;
}
cfg_lineno = 1;
yyin = f;
r = yyparse();
#ifdef HAVE_YYLEX_DESTROY
/* reset lexer and free any allocated memory */
yylex_destroy();
#endif
fclose(f);
if(cfg_infile) {
free(cfg_infile);
cfg_infile = NULL;
}
return r;
}
// Linear-search cache for a few often-referenced strings
char *cache_string(const char *file) {
static char **fnames;
static int n=0;
if(!file)
return NULL;
// Exists in cache?
for(int i=0; i<n; i++)
if(strcmp(fnames[i], file) == 0)
return fnames[i];
// Expand cache?
if(n%128 == 0) {
if(!(fnames = realloc(fnames, (n+128)*sizeof*fnames))) {
yyerror("cache_string(): out of memory");
return NULL;
}
}
fnames[n] = strdup(file);
if(!fnames[n]) {
yyerror("cache_string(): out of memory");
return NULL;
}
return fnames[n++];
}