/* ============================================================================ Name : hstr_history.h Author : martin.dvorak@mindforger.com Copyright : Apache 2.0 Description : Loading and processing of BASH history ============================================================================ */ #include <stdio.h> #include <limits.h> #include <readline/history.h> #include "include/hstr_history.h" #define NDEBUG #include <assert.h> typedef struct { char *item; unsigned rank; } RankedHistoryItem; static HistoryItems *prioritizedHistory; static bool dirty; static const char *commandBlacklist[] = { "ls", "pwd", "cd", "cd ..", "hh", "mc", "ls ", "pwd ", "cd ", "cd .. ", "hh ", "mc " }; #ifdef DEBUG_RADIX #define DEBUG_RADIXSORT() radixsort_stat(&rs, false); exit(0) #else #define DEBUG_RADIXSORT() #endif unsigned history_ranking_function(unsigned rank, int newOccurenceOrder, size_t length) { long metrics=rank+(log(newOccurenceOrder)*10.0)+length; // alternative metrics: // rank+newOccurenceOrder/10+length assert(metrics<UINT_MAX); return metrics; } char *get_history_file_name() { char *historyFile=getenv(ENV_VAR_HISTFILE); if(!historyFile || strlen(historyFile)==0) { char *home = getenv(ENV_VAR_HOME); historyFile = malloc(strlen(home) + 1 + strlen(FILE_DEFAULT_HISTORY) + 1); strcat(strcat(strcpy(historyFile, home), "/"), FILE_DEFAULT_HISTORY); } return historyFile; } void dump_prioritized_history(HistoryItems *ph) { printf("\n\nPrioritized history:"); int i; for(i=0; i<ph->count; i++) { if(ph->items[i]!=NULL) { printf("\n%s",ph->items[i]); fflush(stdout); } else { printf("\n %d NULL",i); fflush(stdout); } } printf("\n"); fflush(stdout); } HistoryItems *get_prioritized_history() { using_history(); char *historyFile = get_history_file_name(); if(read_history(historyFile)!=0) { fprintf(stderr, "\nUnable to read history file from '%s'!\n",historyFile); exit(EXIT_FAILURE); } HISTORY_STATE *historyState=history_get_history_state(); if(historyState->length > 0) { HashSet rankmap; hashset_init(&rankmap); HashSet blacklist; int i; hashset_init(&blacklist); int length=sizeof(commandBlacklist)/sizeof(commandBlacklist[0]); for(i=0; i<length; i++) { hashset_add(&blacklist, commandBlacklist[i]); } RadixSorter rs; unsigned radixMaxKeyEstimate=historyState->size*1000; radixsort_init(&rs, (radixMaxKeyEstimate<100000?100000:radixMaxKeyEstimate)); rs.optFloorAndInsertBigKeys=true; RankedHistoryItem *r; RadixItem *radixItem; HIST_ENTRY **historyList=history_list(); char **rawHistory=malloc(sizeof(char*) * historyState->length); int rawOffset=historyState->length-1; char *line; for(i=0; i<historyState->length; i++, rawOffset--) { line=historyList[i]->line; rawHistory[rawOffset]=line; if(hashset_contains(&blacklist, line)) { continue; } if((r=hashset_get(&rankmap, line))==NULL) { r=malloc(sizeof(RankedHistoryItem)); r->rank=history_ranking_function(0, i, strlen(line)); r->item=historyList[i]->line; hashset_put(&rankmap, line, r); radixItem=malloc(sizeof(RadixItem)); radixItem->key=r->rank; radixItem->data=r; radixItem->next=NULL; radixsort_add(&rs, radixItem); } else { radixItem=radix_cut(&rs, r->rank, r); assert(radixItem); if(radixItem) { r->rank=history_ranking_function(r->rank, i, strlen(line)); radixItem->key=r->rank; radixsort_add(&rs, radixItem); } } } DEBUG_RADIXSORT(); RadixItem **prioritizedRadix=radixsort_dump(&rs); prioritizedHistory=malloc(sizeof(HistoryItems)); prioritizedHistory->count=rs.size; prioritizedHistory->rawCount=historyState->length; prioritizedHistory->items=malloc(rs.size * sizeof(char*)); prioritizedHistory->raw=rawHistory; for(i=0; i<rs.size; i++) { if(prioritizedRadix[i]->data) { prioritizedHistory->items[i]=((RankedHistoryItem *)(prioritizedRadix[i]->data))->item; } free(prioritizedRadix[i]->data); free(prioritizedRadix[i]); } radixsort_destroy(&rs); // TODO rankmap (?) and blacklist (?) to be destroyed return prioritizedHistory; } else { return NULL; } } void free_prioritized_history() { free(prioritizedHistory->items); free(prioritizedHistory); } void history_mgmt_open() { dirty=false; } void history_clear_dirty() { dirty=false; } int history_mgmt_remove(char *cmd) { int offset=history_search_pos(cmd, 0, 0), occurences=0; char *l; HISTORY_STATE *historyState=history_get_history_state(); while(offset>=0) { l=historyState->entries[offset]->line; if(offset<historyState->length && !strcmp(cmd, l)) { occurences++; free_history_entry(remove_history(offset)); } offset=history_search_pos(cmd, 0, ++offset); } if(occurences) { write_history(get_history_file_name()); dirty=true; } return occurences; } void history_mgmt_flush() { if(dirty) { fill_terminal_input("history -r\n", false); } }