-\r
-// option.c\r
-\r
-// includes\r
-\r
-#include <stdlib.h>\r
-#include <string.h>\r
-\r
-#include "option.h"\r
-#include "util.h"\r
-\r
-// constants\r
-\r
-static const bool UseDebug = FALSE;\r
-\r
-\r
-// variables\r
-\r
-#define NNB { NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL }\r
-\r
-option_list_t Option[1];\r
-\r
-option_t DefaultOptions[] = { \r
- { "OptionFile", "string","0","0", "polyglot.ini", NULL,0,NNB, PG}, \r
-\r
- // options\r
-\r
- { "EngineName", "string","0","0", "<empty>" , NULL,0,NNB, PG}, \r
- { "EngineDir", "string","0","0", "." , NULL,0,NNB, PG}, \r
- { "EngineCommand", "string","0","0", "<empty>" , NULL,0,NNB, PG}, \r
-\r
- { "Log", "check","0","0", "false" , NULL,0,NNB, PG|XBOARD|UCI}, \r
- { "LogFile", "string","0","0", "polyglot.log", NULL,0,NNB, PG|XBOARD|UCI}, \r
-\r
- { "UCI", "check","0","0", "false" , NULL,0,NNB, PG}, \r
-\r
- { "UseNice", "check","0","0", "false" , NULL,0,NNB, PG|XBOARD|UCI}, \r
- { "NiceValue", "spin", "0","20", "5" , NULL,0,NNB, PG|XBOARD|UCI}, \r
-\r
- { "Chess960", "check","0","0", "false" , NULL,0,NNB, PG|XBOARD}, \r
-\r
- { "Resign", "check","0","0", "false" , NULL,0,NNB, PG|XBOARD}, \r
- { "ResignMoves", "spin","0","10000", "3" , NULL,0,NNB, PG|XBOARD}, \r
- { "ResignScore", "spin","0","10000", "600" , NULL,0,NNB, PG|XBOARD}, \r
-\r
- { "MateScore", "spin","0","1000000", "10000" , NULL,0,NNB, PG|XBOARD}, \r
-\r
- { "Book", "check","0","0", "false" , NULL,0,NNB, PG|XBOARD|UCI}, \r
- { "BookFile", "string","0","0", "book.bin" , NULL,0,NNB, PG|XBOARD|UCI}, \r
-\r
- { "BookRandom", "check","0","0", "true" , NULL,0,NNB, PG|XBOARD|UCI}, \r
- { "BookLearn", "check","0","0", "false" , NULL,0,NNB, PG|XBOARD}, \r
-\r
- { "KibitzMove", "check","0","0", "false" , NULL,0,NNB, PG|XBOARD}, \r
- { "KibitzPV", "check","0","0", "false" , NULL,0,NNB, PG|XBOARD}, \r
-\r
- { "KibitzCommand", "string","0","0", "tellall" , NULL,0,NNB, PG|XBOARD}, \r
- { "KibitzDelay", "spin","0","10000", "5" , NULL,0,NNB, PG|XBOARD}, \r
- { "KibitzInterval", "spin","0","10000", "0" , NULL,0,NNB, PG|XBOARD}, \r
-\r
- { "ShowPonder", "check","0","0", "false" , NULL,0,NNB, PG|XBOARD}, \r
- { "ScoreWhite", "check","0","0", "false" , NULL,0,NNB, PG|XBOARD}, \r
-\r
- // work-arounds\r
-\r
- { "UCIVersion", "spin","1","2", "2" , NULL,0,NNB, PG|XBOARD}, \r
- { "CanPonder", "check","1","2", "false" , NULL,0,NNB, PG|XBOARD}, \r
- { "SyncStop", "check","1","2", "false" , NULL,0,NNB, PG|XBOARD}, \r
- { "Affinity", "spin","-1","32", "-1" , NULL,0,NNB, PG}, \r
- { "RepeatPV", "check","0","0", "true" , NULL,0,NNB, PG|XBOARD},\r
- { "PromoteWorkAround","check","0","0", "false" , NULL,0,NNB, PG|XBOARD}, \r
-\r
- { "WbWorkArounds", "check","0","0", "true" , NULL,0,NNB, PG|XBOARD}, \r
- { NULL, NULL,"0","0", NULL , NULL,0,NNB, 0},\r
-\r
-};\r
-\r
-\r
-// functions\r
-\r
-// option_is_ok()\r
-\r
-bool option_is_ok(const option_list_t *option) {\r
- if(option->option_nb<0 || option->option_nb>=OptionNb){\r
- return FALSE;\r
- }\r
- return TRUE;\r
-}\r
-\r
-// option_init_pg()\r
-\r
-void option_init_pg() {\r
-\r
- int i;\r
- option_t *p=DefaultOptions;\r
- \r
- option_init(Option);\r
- while(p){\r
- if(p->name){\r
- option_insert(Option,p);\r
- p++;\r
- }else{\r
- break;\r
- }\r
- }\r
- for(i=0;i<Option->option_nb;i++){\r
- Option->options[i].value=my_strdup(Option->options[i].default_);\r
- }\r
-}\r
-\r
-// option_init()\r
-\r
-void option_init(option_list_t *option){\r
- ASSERT(option!=NULL);\r
- option->option_nb=0;\r
- option->iter=0;\r
- memset(option->options,0,sizeof(option->options));\r
-}\r
-\r
-// option_insert()\r
-\r
-void option_insert(option_list_t *option, option_t *new_option){\r
- ASSERT(option!=NULL);\r
- ASSERT(new_option!=NULL);\r
- ASSERT(new_option->name!=NULL);\r
- option_t *opt;\r
- opt=option_find(option,new_option->name);\r
- if(!opt){\r
- opt=&option->options[option->option_nb];\r
- option->option_nb++;\r
- }\r
- int i;\r
- if(option->option_nb>=OptionNb){\r
- my_fatal("option_insert(): option list overflow\n");\r
- }\r
- if(new_option->name) my_string_set(&opt->name, new_option->name);\r
- if(new_option->value) my_string_set(&opt->value, new_option->value);\r
- if(new_option->min) my_string_set(&opt->min, new_option->min);\r
- if(new_option->max) my_string_set(&opt->max, new_option->max);\r
- if(new_option->default_) my_string_set(&opt->default_, new_option->default_);\r
- if(new_option->type) my_string_set(&opt->type, new_option->type);\r
- opt->var_nb=new_option->var_nb;\r
- for(i=0;i<new_option->var_nb;i++){\r
- my_string_set(&opt->var[i], new_option->var[i]);\r
- }\r
- opt->mode=new_option->mode;\r
-}\r
-\r
-// option_set()\r
-\r
-bool option_set(option_list_t *option, \r
- const char name[], \r
- const char value[]) {\r
-\r
- option_t * opt;\r
- ASSERT(option!=NULL);\r
- ASSERT(name!=NULL);\r
- ASSERT(value!=NULL);\r
-\r
- opt = option_find(option,name);\r
- if (opt == NULL) return FALSE;\r
-\r
- my_string_set(&opt->value,value);\r
-\r
- if (UseDebug) my_log("POLYGLOT OPTION SET \"%s\" -> \"%s\"\n",opt->name,opt->value);\r
-\r
- return TRUE;\r
-}\r
-\r
-// option_set_default()\r
-\r
-bool option_set_default(option_list_t *option,\r
- const char name[], \r
- const char value[]) {\r
-\r
- option_t * opt;\r
- ASSERT(name!=NULL);\r
- ASSERT(value!=NULL);\r
-\r
- opt = option_find(option,name);\r
- if (opt == NULL) return FALSE;\r
-\r
- opt->default_=my_strdup(value);\r
-\r
- if (UseDebug) my_log("POLYGLOT OPTION DEFAULT SET \"%s\" -> \"%s\"\n",opt->name,opt->default_);\r
-\r
- return TRUE;\r
-}\r
-\r
-// option_get()\r
-\r
-const char * option_get(option_list_t *option, const char name[]) {\r
-\r
- option_t * opt;\r
-\r
- ASSERT(name!=NULL);\r
-\r
- opt = option_find(option,name);\r
- if (opt == NULL) my_fatal("option_get(): unknown option \"%s\"\n",name);\r
- if (UseDebug) my_log("POLYGLOT OPTION GET \"%s\" -> \"%s\"\n",opt->name,opt->value);\r
-\r
- return opt->value;\r
-}\r
-\r
-// option_get_default()\r
-\r
-const char * option_get_default(option_list_t *option, const char name[]) {\r
-\r
- option_t * opt;\r
-\r
- ASSERT(name!=NULL);\r
-\r
- opt = option_find(option,name);\r
- if (opt == NULL) my_fatal("option_get(): unknown option \"%s\"\n",name);\r
-\r
- if (UseDebug) my_log("POLYGLOT OPTION GET \"%s\" -> \"%s\"\n",opt->name,opt->value);\r
-\r
- return opt->default_;\r
-}\r
-\r
-// option_get_bool()\r
-\r
-bool option_get_bool(option_list_t *option, const char name[]) {\r
-\r
- const char * value;\r
-\r
- value = option_get(option,name);\r
-\r
- if (FALSE) {\r
- } else if (my_string_case_equal(value,"true") || my_string_case_equal(value,"yes") || my_string_equal(value,"1")) {\r
- return TRUE;\r
- } else if (my_string_case_equal(value,"false") || my_string_case_equal(value,"no") || my_string_equal(value,"0")) {\r
- return FALSE;\r
- }\r
-\r
- ASSERT(FALSE);\r
-\r
- return FALSE;\r
-}\r
-\r
-\r
-// option_get_double()\r
-\r
-double option_get_double(option_list_t *option, const char name[]) {\r
-\r
- const char * value;\r
-\r
- value = option_get(option,name);\r
-\r
- return atof(value);\r
-}\r
-\r
-// option_get_int()\r
-\r
-int option_get_int(option_list_t *option, const char name[]) {\r
-\r
- const char * value;\r
-\r
- value = option_get(option,name);\r
-\r
- return atoi(value);\r
-}\r
-\r
-// option_get_string()\r
-\r
-const char * option_get_string(option_list_t *option, const char name[]) {\r
-\r
- const char * value;\r
-\r
- value = option_get(option,name);\r
-\r
- return value;\r
-}\r
-\r
-// option_find()\r
-\r
-option_t * option_find(option_list_t *option, const char name[]) {\r
-\r
- option_t * opt;\r
- int i;\r
-\r
- ASSERT(name!=NULL);\r
- for (i=0; i<option->option_nb; i++){\r
- opt=option->options+i;\r
- if (my_string_case_equal(opt->name,name)){\r
- return opt;\r
- }\r
- }\r
- \r
- return NULL;\r
-}\r
-\r
-void option_start_iter(option_list_t *option){\r
- option->iter=0;\r
-}\r
-\r
-option_t * option_next(option_list_t *option){\r
- ASSERT(option->iter<=option->option_nb);\r
- if(option->iter==option->option_nb){\r
- return NULL;\r
- }\r
- return &option->options[option->iter++];\r
- \r
-}\r
-\r
-void option_free(option_t *option){\r
- int i;\r
- my_string_clear(&option->name);\r
- my_string_clear(&option->type);\r
- my_string_clear(&option->min);\r
- my_string_clear(&option->max);\r
- my_string_clear(&option->default_);\r
- my_string_clear(&option->value);\r
- for(i=0;i<option->var_nb;i++){\r
- my_string_clear(&option->var[i]);\r
- }\r
- option->var_nb=0;\r
- option->mode=0;\r
-}\r
-\r
-void option_clear(option_list_t *option){\r
- int i;\r
- for (i = 0; i < option->option_nb; i++) {\r
- option_free(option->options+i);\r
- }\r
- option->option_nb=0;\r
-}\r
-\r
-// end of option.cpp\r
-\r
+
+// option.c
+
+// includes
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "option.h"
+#include "util.h"
+
+
+// defines
+
+#define NNB { NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL }
+
+// constants
+
+static const bool UseDebug = FALSE;
+
+// variables
+
+
+option_list_t Option[1];
+
+option_t DefaultOptions[] = {
+ // options
+
+ { "SettingsFile", "file","0","0", "polyglot.ini", NULL,0,NNB, PG|XBOARD|XBSEL},
+
+ { "SettingsDir", "path","0","0", "<empty>" , NULL,0,NNB, PG},
+
+ { "OnlyWbOptions", "check","0","0", "true" , NULL,0,NNB, PG|XBOARD},
+
+ { "EngineName", "string","0","0", "<empty>" , NULL,0,NNB, PG},
+ { "EngineDir", "path","0","0", "." , NULL,0,NNB, PG},
+ { "EngineCommand", "string","0","0", "<empty>" , NULL,0,NNB, PG},
+
+ { "Log", "check","0","0", "false" , NULL,0,NNB, PG|XBOARD|XBSEL|UCI},
+ { "LogFile", "file","0","0", "polyglot.log", NULL,0,NNB, PG|XBOARD|XBSEL|UCI},
+
+ { "UCI", "check","0","0", "false" , NULL,0,NNB, PG},
+
+ { "UseNice", "check","0","0", "false" , NULL,0,NNB, PG|XBOARD|UCI},
+ { "NiceValue", "spin", "0","20", "5" , NULL,0,NNB, PG|XBOARD|UCI},
+
+ { "Resign", "check","0","0", "false" , NULL,0,NNB, PG|XBOARD|XBSEL},
+ { "ResignMoves", "spin","0","10000", "3" , NULL,0,NNB, PG|XBOARD|XBSEL},
+ { "ResignScore", "spin","0","10000", "600" , NULL,0,NNB, PG|XBOARD|XBSEL},
+
+ { "MateScore", "spin","0","100000", "10000" , NULL,0,NNB, PG|XBOARD},
+
+ { "Book", "check","0","0", "false" , NULL,0,NNB, PG|XBOARD|XBSEL|UCI},
+ { "BookFile", "file","0","0", "book.bin" , NULL,0,NNB, PG|XBOARD|XBSEL|UCI},
+
+ { "BookRandom", "check","0","0", "true" , NULL,0,NNB, PG|XBOARD|XBSEL|UCI},
+ { "BookDepth", "spin","0","256", "256" , NULL,0,NNB, PG|XBOARD|XBSEL|UCI},
+ { "BookTreshold", "spin","0","1000", "5" , NULL,0,NNB, PG|XBOARD|UCI},
+ { "BookLearn", "check","0","0", "false" , NULL,0,NNB, PG|XBOARD},
+
+ { "KibitzMove", "check","0","0", "false" , NULL,0,NNB, PG|XBOARD},
+ { "KibitzPV", "check","0","0", "false" , NULL,0,NNB, PG|XBOARD},
+
+ { "KibitzCommand", "string","0","0", "tellall" , NULL,0,NNB, PG|XBOARD},
+ { "KibitzDelay", "spin","0","1000", "5" , NULL,0,NNB, PG|XBOARD},
+ { "KibitzInterval", "spin","0","1000", "0" , NULL,0,NNB, PG|XBOARD},
+
+ { "ShowPonder", "check","0","0", "true" , NULL,0,NNB, PG|XBOARD},
+ { "ScoreWhite", "check","0","0", "false" , NULL,0,NNB, PG|XBOARD},
+
+ { "STFudge", "spin","0","1000", "20" , NULL,0,NNB, PG|XBOARD|XBSEL},
+
+ // work-arounds
+
+ { "UCIVersion", "spin","1","2", "2" , NULL,0,NNB, PG|XBOARD},
+ { "CanPonder", "check","1","2", "false" , NULL,0,NNB, PG|XBOARD},
+ { "SyncStop", "check","1","2", "false" , NULL,0,NNB, PG|XBOARD|XBSEL},
+ { "Affinity", "spin","-1","32", "-1" , NULL,0,NNB, PG},
+ { "RepeatPV", "check","0","0", "true" , NULL,0,NNB, PG|XBOARD},
+ { "PromoteWorkAround","check","0","0", "false" , NULL,0,NNB, PG|XBOARD},
+
+ // internal
+
+ { "Chess960", "check","0","0", "false" , NULL,0,NNB, PG},
+
+ // These options flag various hacks in the source to work around
+ // WB quirks. They will eventually all be set to false. Probably
+ // in 4.5.0
+
+ { "WbWorkArounds", "check","0","0", "true" , NULL,0,NNB, PG},
+ { "WbWorkArounds2", "check","0","0", "false" , NULL,0,NNB, PG},
+ { "WbWorkArounds3", "check","0","0", "true" , NULL,0,NNB, PG},
+
+ // Buttons
+
+ { "Save", "save","0","0", "false" , NULL,0,NNB, PG|XBOARD|XBSEL},
+
+ // Sentinel
+
+ { NULL, NULL,"0","0", NULL , NULL,0,NNB, 0},
+
+};
+
+
+// functions
+
+// option_is_ok()
+
+bool option_is_ok(const option_list_t *option) {
+ if(option->option_nb<0 || option->option_nb>=OptionNb){
+ return FALSE;
+ }
+ return TRUE;
+}
+
+// option_init_pg()
+
+void option_init_pg() {
+
+ int i;
+ option_t *p=DefaultOptions;
+ char *home_dir;
+ char SettingsDir[StringSize];
+
+ option_init(Option);
+ while(p){
+ if(p->name){
+ option_insert(Option,p);
+ p++;
+ }else{
+ break;
+ }
+ }
+ for(i=0;i<Option->option_nb;i++){
+ Option->options[i].value=my_strdup(Option->options[i].default_);
+ }
+#ifndef _WIN32
+ home_dir=getenv("HOME");
+ if(!home_dir){
+ home_dir=".";
+ }
+ snprintf(SettingsDir,sizeof(SettingsDir),"%s/.polyglot",home_dir);
+ SettingsDir[sizeof(SettingsDir)-1]='\0';
+#else
+ sprintf(SettingsDir,".\\_PG");
+#endif
+ option_set(Option,"SettingsDir",SettingsDir);
+ option_set_default(Option,"SettingsDir",SettingsDir);
+}
+
+// option_init()
+
+void option_init(option_list_t *option){
+ ASSERT(option!=NULL);
+ option->option_nb=0;
+ option->iter=0;
+ memset(option->options,0,sizeof(option->options));
+}
+
+// option_insert()
+
+void option_insert(option_list_t *option, option_t *new_option){
+ int i;
+ option_t *opt;
+ ASSERT(option!=NULL);
+ ASSERT(new_option!=NULL);
+ ASSERT(new_option->name!=NULL);
+ opt=option_find(option,new_option->name);
+ if(!opt){
+ opt=&option->options[option->option_nb];
+ option->option_nb++;
+ }
+ if(option->option_nb>=OptionNb){
+ my_fatal("option_insert(): option list overflow\n");
+ }
+ if(new_option->name) my_string_set(&opt->name, new_option->name);
+ if(new_option->value) my_string_set(&opt->value, new_option->value);
+ if(new_option->min) my_string_set(&opt->min, new_option->min);
+ if(new_option->max) my_string_set(&opt->max, new_option->max);
+ if(new_option->default_) my_string_set(&opt->default_, new_option->default_);
+ if(new_option->type) my_string_set(&opt->type, new_option->type);
+ opt->var_nb=new_option->var_nb;
+ for(i=0;i<new_option->var_nb;i++){
+ my_string_set(&opt->var[i], new_option->var[i]);
+ }
+ opt->mode=new_option->mode;
+}
+
+// option_set()
+
+bool option_set(option_list_t *option,
+ const char name[],
+ const char value[]) {
+
+ option_t * opt;
+ ASSERT(option!=NULL);
+ ASSERT(name!=NULL);
+ ASSERT(value!=NULL);
+
+ opt = option_find(option,name);
+ if (opt == NULL) return FALSE;
+
+ if(my_string_case_equal(opt->type,"check")){
+ value=(my_string_equal(value,"1")||
+ my_string_case_equal(value,"true"))?"true":"false";
+ }
+
+ my_string_set(&opt->value,value);
+
+ if (UseDebug) my_log("POLYGLOT OPTION SET \"%s\" -> \"%s\"\n",opt->name,opt->value);
+
+ return TRUE;
+}
+
+// option_set_default()
+
+bool option_set_default(option_list_t *option,
+ const char name[],
+ const char value[]) {
+
+ option_t * opt;
+ ASSERT(name!=NULL);
+ ASSERT(value!=NULL);
+
+ opt = option_find(option,name);
+ if (opt == NULL) return FALSE;
+
+ if(my_string_case_equal(opt->type,"check")){
+ value=(my_string_equal(value,"1")||
+ my_string_case_equal(value,"true"))?"true":"false";
+ }
+
+ my_string_set(&opt->default_,value);
+
+ if (UseDebug) my_log("POLYGLOT OPTION DEFAULT SET \"%s\" -> \"%s\"\n",opt->name,opt->default_);
+
+ return TRUE;
+}
+
+// option_get()
+
+const char * option_get(option_list_t *option, const char name[]) {
+
+ option_t * opt;
+
+ ASSERT(name!=NULL);
+
+ opt = option_find(option,name);
+ if (opt == NULL) my_fatal("option_get(): unknown option \"%s\"\n",name);
+ if (UseDebug) my_log("POLYGLOT OPTION GET \"%s\" -> \"%s\"\n",opt->name,opt->value);
+
+ return opt->value;
+}
+
+// option_get_default()
+
+const char * option_get_default(option_list_t *option, const char name[]) {
+
+ option_t * opt;
+
+ ASSERT(name!=NULL);
+
+ opt = option_find(option,name);
+ if (opt == NULL) my_fatal("option_get(): unknown option \"%s\"\n",name);
+
+ if (UseDebug) my_log("POLYGLOT OPTION GET \"%s\" -> \"%s\"\n",opt->name,opt->value);
+
+ return opt->default_;
+}
+
+// option_get_bool()
+
+bool option_get_bool(option_list_t *option, const char name[]) {
+
+ const char * value;
+
+ value = option_get(option,name);
+
+ if (FALSE) {
+ } else if (my_string_case_equal(value,"true") || my_string_case_equal(value,"yes") || my_string_equal(value,"1")) {
+ return TRUE;
+ } else if (my_string_case_equal(value,"false") || my_string_case_equal(value,"no") || my_string_equal(value,"0")) {
+ return FALSE;
+ }
+
+ ASSERT(FALSE);
+
+ return FALSE;
+}
+
+
+// option_get_double()
+
+double option_get_double(option_list_t *option, const char name[]) {
+
+ const char * value;
+
+ value = option_get(option,name);
+
+ return atof(value);
+}
+
+// option_get_int()
+
+int option_get_int(option_list_t *option, const char name[]) {
+
+ const char * value;
+
+ value = option_get(option,name);
+
+ return atoi(value);
+}
+
+// option_get_string()
+
+const char * option_get_string(option_list_t *option, const char name[]) {
+
+ const char * value;
+
+ value = option_get(option,name);
+
+ return value;
+}
+
+// option_find()
+
+option_t * option_find(option_list_t *option, const char name[]) {
+
+ option_t * opt;
+ int i;
+
+ ASSERT(name!=NULL);
+ for (i=0; i<option->option_nb; i++){
+ opt=option->options+i;
+ if (my_string_case_equal(opt->name,name)){
+ return opt;
+ }
+ }
+
+ return NULL;
+}
+
+// option_start_iter()
+
+void option_start_iter(option_list_t *option){
+ option->iter=0;
+}
+
+// option_next()
+
+option_t * option_next(option_list_t *option){
+ ASSERT(option->iter<=option->option_nb);
+ if(option->iter==option->option_nb){
+ return NULL;
+ }
+ return &option->options[option->iter++];
+
+}
+
+void option_free(option_t *option){
+ int i;
+ my_string_clear(&option->name);
+ my_string_clear(&option->type);
+ my_string_clear(&option->min);
+ my_string_clear(&option->max);
+ my_string_clear(&option->default_);
+ my_string_clear(&option->value);
+ for(i=0;i<option->var_nb;i++){
+ my_string_clear(&option->var[i]);
+ }
+ option->var_nb=0;
+ option->mode=0;
+}
+
+// option_clear()
+
+void option_clear(option_list_t *option){
+ int i;
+ for (i = 0; i < option->option_nb; i++) {
+ option_free(option->options+i);
+ }
+ option->option_nb=0;
+}
+
+// option_from_ini()
+
+void option_from_ini(option_list_t *option,
+ ini_t *ini,
+ const char *section){
+ ini_entry_t *entry;
+ ini_start_iter(ini);
+ while((entry=ini_next(ini))){
+ option_set(option,entry->name,entry->value);
+ option_set_default(option,entry->name,entry->value);
+ }
+}
+
+// end of option.cpp
+
projects / polyglot.git / blobdiff