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-rw-r--r--src/map/script.c125
1 files changed, 90 insertions, 35 deletions
diff --git a/src/map/script.c b/src/map/script.c
index 78ed1935f..8d338c6a4 100644
--- a/src/map/script.c
+++ b/src/map/script.c
@@ -78,8 +78,13 @@ static struct str_data_struct {
int next;
} *str_data = NULL;
int str_num=LABEL_START,str_data_size;
-#define SCRIPT_HASH_SIZE 1024
+// Using a prime number for SCRIPT_HASH_SIZE should give better distributions
+#define SCRIPT_HASH_SIZE 1021
int str_hash[SCRIPT_HASH_SIZE];
+//#define SCRIPT_HASH_DJB2
+//#define SCRIPT_HASH_SDBM
+//#define SCRIPT_HASH_ELF
+//#define SCRIPT_HASH_PJW
static struct dbt *mapreg_db=NULL;
static struct dbt *mapregstr_db=NULL;
@@ -272,18 +277,53 @@ static void check_event(struct script_state *st, const char *event){
}
return;
}
+
/*==========================================
* 文字列のハッシュを計算
*------------------------------------------
*/
-static int calc_hash(const unsigned char *p)
-{
- int h=0;
- while(*p){
- h=(h<<1)+(h>>3)+(h>>5)+(h>>8);
+#define calc_hash(x) calc_hash2(x)%SCRIPT_HASH_SIZE
+static unsigned int calc_hash2(const unsigned char *p)
+{
+#if defined(SCRIPT_HASH_DJB2)
+ unsigned int h = 5381;
+ while( *p ) // hash*33 + c
+ h = ( h << 5 ) + h + ((unsigned char)tolower(*p++));
+ return h;
+#elif defined(SCRIPT_HASH_SDBM)
+ unsigned int h = 0;
+ while( *p )
+ h = ( h << 6 ) + ( h << 16 ) - h + ((unsigned char)tolower(*p++));
+ return h;
+#elif defined(SCRIPT_HASH_ELF)
+ unsigned int h = 0;
+ unsigned int g;
+ while( *p ){ // UNIX ELF hash
+ h = ( h << 4 ) + ((unsigned char)tolower(*p++));
+ if ( g = h & 0xF0000000 )
+ h ^= g >> 24;
+ h &= ~g;
+ }
+ return h;
+#elif defined(SCRIPT_HASH_PJW)
+ unsigned int h = 0;
+ unsigned int g;
+ while( *p ){
+ h = ( h << 4 ) + ((unsigned char)tolower(*p++));
+ if ( (g=h&0xF0000000) ) {
+ h ^= g>>24;
+ h ^= g;
+ }
+ }
+ return h;
+#else
+ unsigned int h = 0;
+ while( *p ){
+ h = ( h << 1 ) + ( h >> 3 ) + ( h >> 5 ) + ( h >> 8 );
h+=(unsigned char)tolower(*p++);
}
- return h&(SCRIPT_HASH_SIZE-1);
+ return h;
+#endif
}
/*==========================================
@@ -314,9 +354,6 @@ int add_str(const char* p)
int i;
int len;
- if((i=search_str(p)) >= 0)
- return i;
-
i=calc_hash(p);
if(str_hash[i]==0){
str_hash[i]=str_num;
@@ -922,7 +959,7 @@ const char* parse_curly_close(const char* p) {
const char* parse_syntax(const char* p) {
switch(*p) {
case 'b':
- if(!strncmp(p,"break",5) && !ISALPHA(p[5])) {
+ if(!strncasecmp(p,"break",5) && !ISALPHA(p[5])) {
// break の処理
char label[256];
int pos = syntax.curly_count - 1;
@@ -957,7 +994,7 @@ const char* parse_syntax(const char* p) {
}
break;
case 'c':
- if(!strncmp(p,"case",4) && !ISALPHA(p[4])) {
+ if(!strncasecmp(p,"case",4) && !ISALPHA(p[4])) {
// case の処理
if(syntax.curly_count <= 0 || syntax.curly[syntax.curly_count - 1].type != TYPE_SWITCH) {
disp_error_message("parse_syntax: unexpected 'case' ",p);
@@ -1012,7 +1049,7 @@ const char* parse_syntax(const char* p) {
syntax.curly[pos].count++;
}
return p + 1;
- } else if(!strncmp(p,"continue",8) && !ISALPHA(p[8])) {
+ } else if(!strncasecmp(p,"continue",8) && !ISALPHA(p[8])) {
// continue の処理
char label[256];
int pos = syntax.curly_count - 1;
@@ -1045,7 +1082,7 @@ const char* parse_syntax(const char* p) {
}
break;
case 'd':
- if(!strncmp(p,"default",7) && !ISALPHA(p[7])) {
+ if(!strncasecmp(p,"default",7) && !ISALPHA(p[7])) {
// switch - default の処理
if(syntax.curly_count <= 0 || syntax.curly[syntax.curly_count - 1].type != TYPE_SWITCH) {
disp_error_message("parse_syntax: unexpected 'default'",p);
@@ -1085,7 +1122,7 @@ const char* parse_syntax(const char* p) {
p = skip_word(p);
return p + 1;
}
- } else if(!strncmp(p,"do",2) && !ISALPHA(p[2])) {
+ } else if(!strncasecmp(p,"do",2) && !ISALPHA(p[2])) {
int l;
char label[256];
p=skip_word(p);
@@ -1104,7 +1141,7 @@ const char* parse_syntax(const char* p) {
}
break;
case 'f':
- if(!strncmp(p,"for",3) && !ISALPHA(p[3])) {
+ if(!strncasecmp(p,"for",3) && !ISALPHA(p[3])) {
int l;
char label[256];
int pos = syntax.curly_count;
@@ -1183,7 +1220,7 @@ const char* parse_syntax(const char* p) {
l=add_str(label);
set_label(l,script_pos,p);
return p;
- } else if(!strncmp(p,"function",8) && !ISALPHA(p[8])) {
+ } else if(!strncasecmp(p,"function",8) && !ISALPHA(p[8])) {
const char *func_name;
// function
p=skip_word(p);
@@ -1226,7 +1263,7 @@ const char* parse_syntax(const char* p) {
}
break;
case 'i':
- if(!strncmp(p,"if",2) && !ISALPHA(p[2])) {
+ if(!strncasecmp(p,"if",2) && !ISALPHA(p[2])) {
// if() の処理
char label[256];
p=skip_word(p);
@@ -1250,7 +1287,7 @@ const char* parse_syntax(const char* p) {
}
break;
case 's':
- if(!strncmp(p,"switch",6) && !ISALPHA(p[6])) {
+ if(!strncasecmp(p,"switch",6) && !ISALPHA(p[6])) {
// switch() の処理
char label[256];
p=skip_word(p);
@@ -1277,7 +1314,7 @@ const char* parse_syntax(const char* p) {
}
break;
case 'w':
- if(!strncmp(p,"while",5) && !ISALPHA(p[5])) {
+ if(!strncasecmp(p,"while",5) && !ISALPHA(p[5])) {
int l;
char label[256];
p=skip_word(p);
@@ -1347,11 +1384,11 @@ const char* parse_syntax_close_sub(const char* p,int* flag) {
syntax.curly[pos].count++;
p = skip_space(p);
- if(!syntax.curly[pos].flag && !strncmp(p,"else",4) && !ISALPHA(p[4])) {
+ if(!syntax.curly[pos].flag && !strncasecmp(p,"else",4) && !ISALPHA(p[4])) {
// else or else - if
p = skip_word(p);
p = skip_space(p);
- if(!strncmp(p,"if",2) && !ISALPHA(p[2])) {
+ if(!strncasecmp(p,"if",2) && !ISALPHA(p[2])) {
// else - if
p=skip_word(p);
p=skip_space(p);
@@ -1402,7 +1439,7 @@ const char* parse_syntax_close_sub(const char* p,int* flag) {
// 条件が偽なら終了地点に飛ばす
p = skip_space(p);
p2 = skip_word(p);
- if(p2 - p != 5 || strncmp("while",p,5)) {
+ if(p2 - p != 5 || strncasecmp("while",p,5)) {
disp_error_message("parse_syntax: need 'while'",p);
}
@@ -1662,7 +1699,7 @@ struct script_code* parse_script(const char *src,const char *file,int line,int o
p=skip_space(p);
// labelだけ特殊処理
tmpp=skip_space(skip_word(p));
- if(*tmpp==':' && !(!strncmp(p,"default:",8) && p + 7 == tmpp)){
+ if(*tmpp==':' && !(!strncasecmp(p,"default:",8) && p + 7 == tmpp)){
i=add_word(p);
set_label(i,script_pos,p);
if( parse_options&SCRIPT_USE_LABEL_DB )
@@ -3266,24 +3303,25 @@ int do_final_script()
FILE *fp = fopen("hash_dump.txt","wt");
if(fp) {
int i,count[SCRIPT_HASH_SIZE];
- int min=0x7fffffff,max=0,zero=0;
+ int count2[SCRIPT_HASH_SIZE]; // number of buckets with a certain number of items
+ int n=0;
+ int min=INT_MAX,max=0,zero=0;
+ double mean=0.0f;
+ double median=0.0f;
ShowNotice("Dumping script str hash information to hash_dump.txt\n");
memset(count, 0, sizeof(count));
fprintf(fp,"num : calced_val -> hash : data_name\n");
fprintf(fp,"---------------------------------------------------------------\n");
for(i=LABEL_START; i<str_num; i++) {
- int h=0;
- char *p = str_buf+str_data[i].str;
- while(*p){
- h=(h<<1)+(h>>3)+(h>>5)+(h>>8);
- h+=(unsigned char)tolower(*p++);
- }
- fprintf(fp,"%04d: %10d -> %3d : %s\n",i,h,h&(SCRIPT_HASH_SIZE-1),str_buf+str_data[i].str);
- count[h&(SCRIPT_HASH_SIZE-1)]++;
+ unsigned int h2=calc_hash2(str_buf+str_data[i].str);
+ unsigned int h =h2%SCRIPT_HASH_SIZE;
+ fprintf(fp,"%04d: %10u -> %3u : %s\n",i,h2,h,str_buf+str_data[i].str);
+ ++count[h];
}
fprintf(fp,"--------------------\n\n");
- for(i=0; i<sizeof(count)/sizeof(count[0]); i++) {
+ memset(count2, 0, sizeof(count2));
+ for(i=0; i<SCRIPT_HASH_SIZE; i++) {
fprintf(fp," hash %3d = %d\n",i,count[i]);
if(min > count[i])
min = count[i]; // minimun count of collision
@@ -3291,8 +3329,25 @@ int do_final_script()
max = count[i]; // maximun count of collision
if(count[i] == 0)
zero++;
+ ++count2[count[i]];
+ }
+ fprintf(fp,"\n--------------------\n items : buckets\n--------------------\n");
+ for( i=min; i <= max; ++i ){
+ fprintf(fp," %5d : %7d\n",i,count2[i]);
+ mean += 1.0f*i*count2[i]/SCRIPT_HASH_SIZE; // Note: this will always result in <nr labels>/<nr buckets>
+ }
+ for( i=min; i <= max; ++i ){
+ n += count2[i];
+ if( n*2 >= SCRIPT_HASH_SIZE )
+ {
+ if( SCRIPT_HASH_SIZE%2 == 0 && SCRIPT_HASH_SIZE/2 == n )
+ median = (i+i+1)/2.0f;
+ else
+ median = i;
+ break;
+ }
}
- fprintf(fp,"--------------------\n min = %d, max = %d, zero = %d\n",min,max,zero);
+ fprintf(fp,"--------------------\n min = %d, max = %d, zero = %d\n mean = %lf, median = %lf\n",min,max,zero,mean,median);
fclose(fp);
}
}
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