mirror of
https://github.com/mpv-player/mpv
synced 2024-12-15 03:15:52 +00:00
2e8e95d779
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@9923 b3059339-0415-0410-9bf9-f77b7e298cf2
671 lines
11 KiB
C
671 lines
11 KiB
C
/*
|
|
* This file was ported to MPlayer from xine CVS asmrp.c,v 1.2 2002/12/17 16:49:48
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2002 the xine project
|
|
*
|
|
* This file is part of xine, a free video player.
|
|
*
|
|
* xine 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.
|
|
*
|
|
* xine 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
|
|
*
|
|
*
|
|
* a parser for real's asm rules
|
|
*
|
|
* grammar for these rules:
|
|
*
|
|
|
|
rule_book = { rule }
|
|
rule = ( '#' condition { ',' assignment } | [ assignment {',' assignment} ]) ';'
|
|
assignment = id '=' const
|
|
const = ( number | string )
|
|
condition = comp_expr { ( '&&' | '||' ) comp_expr }
|
|
comp_expr = operand { ( '<' | '<=' | '==' | '>=' | '>' ) operand }
|
|
operand = ( '$' id | num | '(' condition ')' )
|
|
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
/*
|
|
#define LOG
|
|
*/
|
|
|
|
#define ASMRP_SYM_NONE 0
|
|
#define ASMRP_SYM_EOF 1
|
|
|
|
#define ASMRP_SYM_NUM 2
|
|
#define ASMRP_SYM_ID 3
|
|
#define ASMRP_SYM_STRING 4
|
|
|
|
#define ASMRP_SYM_HASH 10
|
|
#define ASMRP_SYM_SEMICOLON 11
|
|
#define ASMRP_SYM_COMMA 12
|
|
#define ASMRP_SYM_EQUALS 13
|
|
#define ASMRP_SYM_AND 14
|
|
#define ASMRP_SYM_OR 15
|
|
#define ASMRP_SYM_LESS 16
|
|
#define ASMRP_SYM_LEQ 17
|
|
#define ASMRP_SYM_GEQ 18
|
|
#define ASMRP_SYM_GREATER 19
|
|
#define ASMRP_SYM_DOLLAR 20
|
|
#define ASMRP_SYM_LPAREN 21
|
|
#define ASMRP_SYM_RPAREN 22
|
|
|
|
#define ASMRP_MAX_ID 1024
|
|
|
|
#define ASMRP_MAX_SYMTAB 10
|
|
|
|
typedef struct {
|
|
char *id;
|
|
int v;
|
|
} asmrp_sym_t;
|
|
|
|
typedef struct {
|
|
|
|
/* public part */
|
|
|
|
int sym;
|
|
int num;
|
|
|
|
char str[ASMRP_MAX_ID];
|
|
|
|
/* private part */
|
|
|
|
char *buf;
|
|
int pos;
|
|
char ch;
|
|
|
|
asmrp_sym_t sym_tab[ASMRP_MAX_SYMTAB];
|
|
int sym_tab_num;
|
|
|
|
} asmrp_t;
|
|
|
|
static asmrp_t *asmrp_new () {
|
|
|
|
asmrp_t *p;
|
|
|
|
p = malloc (sizeof (asmrp_t));
|
|
|
|
p->sym_tab_num = 0;
|
|
p->sym = ASMRP_SYM_NONE;
|
|
|
|
return p;
|
|
}
|
|
|
|
static void asmrp_dispose (asmrp_t *p) {
|
|
|
|
int i;
|
|
|
|
for (i=0; i<p->sym_tab_num; i++)
|
|
free (p->sym_tab[i].id);
|
|
|
|
free (p);
|
|
}
|
|
|
|
static void asmrp_getch (asmrp_t *p) {
|
|
p->ch = p->buf[p->pos];
|
|
p->pos++;
|
|
|
|
#ifdef LOG
|
|
printf ("%c\n", p->ch);
|
|
#endif
|
|
|
|
}
|
|
|
|
static void asmrp_init (asmrp_t *p, const char *str) {
|
|
|
|
p->buf = strdup (str);
|
|
p->pos = 0;
|
|
|
|
asmrp_getch (p);
|
|
}
|
|
|
|
static void asmrp_number (asmrp_t *p) {
|
|
|
|
int num;
|
|
|
|
num = 0;
|
|
while ( (p->ch>='0') && (p->ch<='9') ) {
|
|
|
|
num = num*10 + (p->ch - '0');
|
|
|
|
asmrp_getch (p);
|
|
}
|
|
|
|
p->sym = ASMRP_SYM_NUM;
|
|
p->num = num;
|
|
}
|
|
|
|
static void asmrp_string (asmrp_t *p) {
|
|
|
|
int l;
|
|
|
|
l = 0;
|
|
|
|
while ( (p->ch!='"') && (p->ch>=32) ) {
|
|
|
|
p->str[l] = p->ch;
|
|
|
|
l++;
|
|
asmrp_getch (p);
|
|
}
|
|
p->str[l]=0;
|
|
|
|
if (p->ch=='"')
|
|
asmrp_getch (p);
|
|
|
|
p->sym = ASMRP_SYM_STRING;
|
|
}
|
|
|
|
static void asmrp_identifier (asmrp_t *p) {
|
|
|
|
int l;
|
|
|
|
l = 0;
|
|
|
|
while ( ((p->ch>='A') && (p->ch<='z'))
|
|
|| ((p->ch>='0') && (p->ch<='9'))) {
|
|
|
|
p->str[l] = p->ch;
|
|
|
|
l++;
|
|
asmrp_getch (p);
|
|
}
|
|
p->str[l]=0;
|
|
|
|
p->sym = ASMRP_SYM_ID;
|
|
}
|
|
|
|
#ifdef LOG
|
|
static void asmrp_print_sym (asmrp_t *p) {
|
|
|
|
printf ("symbol: ");
|
|
|
|
switch (p->sym) {
|
|
|
|
case ASMRP_SYM_NONE:
|
|
printf ("NONE\n");
|
|
break;
|
|
|
|
case ASMRP_SYM_EOF:
|
|
printf ("EOF\n");
|
|
break;
|
|
|
|
case ASMRP_SYM_NUM:
|
|
printf ("NUM %d\n", p->num);
|
|
break;
|
|
|
|
case ASMRP_SYM_ID:
|
|
printf ("ID '%s'\n", p->str);
|
|
break;
|
|
|
|
case ASMRP_SYM_STRING:
|
|
printf ("STRING \"%s\"\n", p->str);
|
|
break;
|
|
|
|
case ASMRP_SYM_HASH:
|
|
printf ("#\n");
|
|
break;
|
|
|
|
case ASMRP_SYM_SEMICOLON:
|
|
printf (";\n");
|
|
break;
|
|
case ASMRP_SYM_COMMA:
|
|
printf (",\n");
|
|
break;
|
|
case ASMRP_SYM_EQUALS:
|
|
printf ("==\n");
|
|
break;
|
|
case ASMRP_SYM_AND:
|
|
printf ("&&\n");
|
|
break;
|
|
case ASMRP_SYM_OR:
|
|
printf ("||\n");
|
|
break;
|
|
case ASMRP_SYM_LESS:
|
|
printf ("<\n");
|
|
break;
|
|
case ASMRP_SYM_LEQ:
|
|
printf ("<=\n");
|
|
break;
|
|
case ASMRP_SYM_GEQ:
|
|
printf (">=\n");
|
|
break;
|
|
case ASMRP_SYM_GREATER:
|
|
printf (">\n");
|
|
break;
|
|
case ASMRP_SYM_DOLLAR:
|
|
printf ("$\n");
|
|
break;
|
|
case ASMRP_SYM_LPAREN:
|
|
printf ("(\n");
|
|
break;
|
|
case ASMRP_SYM_RPAREN:
|
|
printf (")\n");
|
|
break;
|
|
|
|
default:
|
|
printf ("unknown symbol %d\n", p->sym);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static void asmrp_get_sym (asmrp_t *p) {
|
|
|
|
while (p->ch <= 32) {
|
|
if (p->ch == 0) {
|
|
p->sym = ASMRP_SYM_EOF;
|
|
return;
|
|
}
|
|
|
|
asmrp_getch (p);
|
|
}
|
|
|
|
if (p->ch == '\\')
|
|
asmrp_getch (p);
|
|
|
|
switch (p->ch) {
|
|
|
|
case '#':
|
|
p->sym = ASMRP_SYM_HASH;
|
|
asmrp_getch (p);
|
|
break;
|
|
case ';':
|
|
p->sym = ASMRP_SYM_SEMICOLON;
|
|
asmrp_getch (p);
|
|
break;
|
|
case ',':
|
|
p->sym = ASMRP_SYM_COMMA;
|
|
asmrp_getch (p);
|
|
break;
|
|
case '=':
|
|
p->sym = ASMRP_SYM_EQUALS;
|
|
asmrp_getch (p);
|
|
if (p->ch=='=')
|
|
asmrp_getch (p);
|
|
break;
|
|
case '&':
|
|
p->sym = ASMRP_SYM_AND;
|
|
asmrp_getch (p);
|
|
if (p->ch=='&')
|
|
asmrp_getch (p);
|
|
break;
|
|
case '|':
|
|
p->sym = ASMRP_SYM_OR;
|
|
asmrp_getch (p);
|
|
if (p->ch=='|')
|
|
asmrp_getch (p);
|
|
break;
|
|
case '<':
|
|
p->sym = ASMRP_SYM_LESS;
|
|
asmrp_getch (p);
|
|
if (p->ch=='=') {
|
|
p->sym = ASMRP_SYM_LEQ;
|
|
asmrp_getch (p);
|
|
}
|
|
break;
|
|
case '>':
|
|
p->sym = ASMRP_SYM_GREATER;
|
|
asmrp_getch (p);
|
|
if (p->ch=='=') {
|
|
p->sym = ASMRP_SYM_GEQ;
|
|
asmrp_getch (p);
|
|
}
|
|
break;
|
|
case '$':
|
|
p->sym = ASMRP_SYM_DOLLAR;
|
|
asmrp_getch (p);
|
|
break;
|
|
case '(':
|
|
p->sym = ASMRP_SYM_LPAREN;
|
|
asmrp_getch (p);
|
|
break;
|
|
case ')':
|
|
p->sym = ASMRP_SYM_RPAREN;
|
|
asmrp_getch (p);
|
|
break;
|
|
|
|
case '"':
|
|
asmrp_getch (p);
|
|
asmrp_string (p);
|
|
break;
|
|
|
|
case '0': case '1': case '2': case '3': case '4':
|
|
case '5': case '6': case '7': case '8': case '9':
|
|
asmrp_number (p);
|
|
break;
|
|
|
|
default:
|
|
asmrp_identifier (p);
|
|
}
|
|
|
|
#ifdef LOG
|
|
asmrp_print_sym (p);
|
|
#endif
|
|
|
|
}
|
|
|
|
static int asmrp_find_id (asmrp_t *p, char *s) {
|
|
|
|
int i;
|
|
|
|
for (i=0; i<p->sym_tab_num; i++) {
|
|
if (!strcmp (s, p->sym_tab[i].id))
|
|
return i;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
static int asmrp_set_id (asmrp_t *p, char *s, int v) {
|
|
|
|
int i;
|
|
|
|
i = asmrp_find_id (p, s);
|
|
|
|
if (i<0) {
|
|
i = p->sym_tab_num;
|
|
p->sym_tab_num++;
|
|
p->sym_tab[i].id = strdup (s);
|
|
|
|
#ifdef LOG
|
|
printf ("new symbol '%s'\n", s);
|
|
#endif
|
|
|
|
}
|
|
|
|
p->sym_tab[i].v = v;
|
|
|
|
#ifdef LOG
|
|
printf ("symbol '%s' assigned %d\n", s, v);
|
|
#endif
|
|
|
|
return i;
|
|
}
|
|
|
|
static int asmrp_condition (asmrp_t *p) ;
|
|
|
|
static int asmrp_operand (asmrp_t *p) {
|
|
|
|
int i, ret;
|
|
|
|
#ifdef LOG
|
|
printf ("operand\n");
|
|
#endif
|
|
|
|
ret = 0;
|
|
|
|
switch (p->sym) {
|
|
|
|
case ASMRP_SYM_DOLLAR:
|
|
|
|
asmrp_get_sym (p);
|
|
|
|
if (p->sym != ASMRP_SYM_ID) {
|
|
printf ("error: identifier expected.\n");
|
|
abort();
|
|
}
|
|
|
|
i = asmrp_find_id (p, p->str);
|
|
if (i<0) {
|
|
printf ("error: unknown identifier %s\n", p->str);
|
|
}
|
|
ret = p->sym_tab[i].v;
|
|
|
|
asmrp_get_sym (p);
|
|
break;
|
|
|
|
case ASMRP_SYM_NUM:
|
|
ret = p->num;
|
|
|
|
asmrp_get_sym (p);
|
|
break;
|
|
|
|
case ASMRP_SYM_LPAREN:
|
|
asmrp_get_sym (p);
|
|
|
|
ret = asmrp_condition (p);
|
|
|
|
if (p->sym != ASMRP_SYM_RPAREN) {
|
|
printf ("error: ) expected.\n");
|
|
abort();
|
|
}
|
|
|
|
asmrp_get_sym (p);
|
|
break;
|
|
|
|
default:
|
|
printf ("syntax error, $ number or ( expected\n");
|
|
abort();
|
|
}
|
|
|
|
#ifdef LOG
|
|
printf ("operand done, =%d\n", ret);
|
|
#endif
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int asmrp_comp_expression (asmrp_t *p) {
|
|
|
|
int a;
|
|
|
|
#ifdef LOG
|
|
printf ("comp_expression\n");
|
|
#endif
|
|
|
|
a = asmrp_operand (p);
|
|
|
|
while ( (p->sym == ASMRP_SYM_LESS)
|
|
|| (p->sym == ASMRP_SYM_LEQ)
|
|
|| (p->sym == ASMRP_SYM_EQUALS)
|
|
|| (p->sym == ASMRP_SYM_GEQ)
|
|
|| (p->sym == ASMRP_SYM_GREATER) ) {
|
|
int op = p->sym;
|
|
int b;
|
|
|
|
asmrp_get_sym (p);
|
|
|
|
b = asmrp_operand (p);
|
|
|
|
switch (op) {
|
|
case ASMRP_SYM_LESS:
|
|
a = a<b;
|
|
break;
|
|
case ASMRP_SYM_LEQ:
|
|
a = a<=b;
|
|
break;
|
|
case ASMRP_SYM_EQUALS:
|
|
a = a==b;
|
|
break;
|
|
case ASMRP_SYM_GEQ:
|
|
a = a>=b;
|
|
break;
|
|
case ASMRP_SYM_GREATER:
|
|
a = a>b;
|
|
break;
|
|
}
|
|
|
|
}
|
|
|
|
#ifdef LOG
|
|
printf ("comp_expression done = %d\n", a);
|
|
#endif
|
|
return a;
|
|
}
|
|
|
|
static int asmrp_condition (asmrp_t *p) {
|
|
|
|
int a;
|
|
|
|
#ifdef LOG
|
|
printf ("condition\n");
|
|
#endif
|
|
|
|
a = asmrp_comp_expression (p);
|
|
|
|
while ( (p->sym == ASMRP_SYM_AND) || (p->sym == ASMRP_SYM_OR) ) {
|
|
int op, b;
|
|
|
|
op = p->sym;
|
|
|
|
asmrp_get_sym (p);
|
|
|
|
b = asmrp_comp_expression (p);
|
|
|
|
switch (op) {
|
|
case ASMRP_SYM_AND:
|
|
a = a & b;
|
|
break;
|
|
case ASMRP_SYM_OR:
|
|
a = a | b;
|
|
break;
|
|
}
|
|
}
|
|
|
|
#ifdef LOG
|
|
printf ("condition done = %d\n", a);
|
|
#endif
|
|
return a;
|
|
}
|
|
|
|
static void asmrp_assignment (asmrp_t *p) {
|
|
|
|
#ifdef LOG
|
|
printf ("assignment\n");
|
|
#endif
|
|
|
|
if (p->sym != ASMRP_SYM_ID) {
|
|
printf ("error: identifier expected\n");
|
|
abort ();
|
|
}
|
|
asmrp_get_sym (p);
|
|
|
|
if (p->sym != ASMRP_SYM_EQUALS) {
|
|
printf ("error: = expected\n");
|
|
abort ();
|
|
}
|
|
asmrp_get_sym (p);
|
|
|
|
if ( (p->sym != ASMRP_SYM_NUM) && (p->sym != ASMRP_SYM_STRING)
|
|
&& (p->sym != ASMRP_SYM_ID)) {
|
|
printf ("error: number or string expected\n");
|
|
abort ();
|
|
}
|
|
asmrp_get_sym (p);
|
|
|
|
#ifdef LOG
|
|
printf ("assignment done\n");
|
|
#endif
|
|
}
|
|
|
|
static int asmrp_rule (asmrp_t *p) {
|
|
|
|
int ret;
|
|
|
|
#ifdef LOG
|
|
printf ("rule\n");
|
|
#endif
|
|
|
|
ret = 1;
|
|
|
|
if (p->sym == ASMRP_SYM_HASH) {
|
|
|
|
asmrp_get_sym (p);
|
|
ret = asmrp_condition (p);
|
|
|
|
while (p->sym == ASMRP_SYM_COMMA) {
|
|
|
|
asmrp_get_sym (p);
|
|
|
|
asmrp_assignment (p);
|
|
}
|
|
|
|
} else if (p->sym != ASMRP_SYM_SEMICOLON) {
|
|
|
|
asmrp_assignment (p);
|
|
|
|
while (p->sym == ASMRP_SYM_COMMA) {
|
|
|
|
asmrp_get_sym (p);
|
|
asmrp_assignment (p);
|
|
}
|
|
}
|
|
|
|
#ifdef LOG
|
|
printf ("rule done = %d\n", ret);
|
|
#endif
|
|
|
|
if (p->sym != ASMRP_SYM_SEMICOLON) {
|
|
printf ("semicolon expected.\n");
|
|
abort ();
|
|
}
|
|
|
|
asmrp_get_sym (p);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int asmrp_eval (asmrp_t *p, int *matches) {
|
|
|
|
int rule_num, num_matches;
|
|
|
|
#ifdef LOG
|
|
printf ("eval\n");
|
|
#endif
|
|
|
|
asmrp_get_sym (p);
|
|
|
|
rule_num = 0; num_matches = 0;
|
|
while (p->sym != ASMRP_SYM_EOF) {
|
|
|
|
if (asmrp_rule (p)) {
|
|
#ifdef LOG
|
|
printf ("rule #%d is true\n", rule_num);
|
|
#endif
|
|
matches[num_matches] = rule_num;
|
|
num_matches++;
|
|
}
|
|
|
|
rule_num++;
|
|
}
|
|
|
|
matches[num_matches] = -1;
|
|
return num_matches;
|
|
}
|
|
|
|
int asmrp_match (const char *rules, int bandwidth, int *matches) {
|
|
|
|
asmrp_t *p;
|
|
int num_matches;
|
|
|
|
p = asmrp_new ();
|
|
|
|
asmrp_init (p, rules);
|
|
|
|
asmrp_set_id (p, "Bandwidth", bandwidth);
|
|
asmrp_set_id (p, "OldPNMPlayer", 0);
|
|
|
|
num_matches = asmrp_eval (p, matches);
|
|
|
|
asmrp_dispose (p);
|
|
|
|
return num_matches;
|
|
}
|
|
|