Clean System Files/readLine.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3
   4 #include <readline/readline.h>
   5 #include <readline/history.h>
   6
   7 #include "Clean.h"
   8
   9 static char *cs_answer = (char *)NULL;
  10 HISTORY_STATE *history_state = NULL;
  11
  12 char *cleanStringToCString(CleanString s){
  13         unsigned long len = CleanStringLength(s);
  14         char *cs = (char *)malloc(len+1);
  15         if(cs == NULL){
  16                 printf("malloc failed...\n");
  17                 exit(1);
  18         }
  19         memcpy(cs, CleanStringCharacters(s), len);
  20         cs[len] = '\0';
  21         return cs;
  22 }
  23
  24 void cleanReadLine(CleanString prompt, int history, CleanString *result)
  25 {
  26         char *cs_prompt = cleanStringToCString(prompt);
  27
  28         //Get the answer and add to history if not empty
  29         if(cs_answer){
  30                 free(cs_answer);
  31                 cs_answer = (char *)NULL;
  32         }
  33         cs_answer = readline(cs_prompt);
  34         free(cs_prompt);
  35         if(cs_answer && *cs_answer && history){
  36                 add_history(cs_answer);
  37         }
  38
  39         if(!cs_answer){ //In case of an EOF
  40                 CleanStringVariable(answer, 1);
  41                 *result = (CleanString) answer;
  42                 memcpy(CleanStringCharacters(answer), "", 1);
  43                 CleanStringLength(answer) = 1;
  44         } else { //In case of a proper response
  45                 CleanStringVariable(answer, strlen(cs_answer));
  46                 *result = (CleanString) answer;
  47                 memcpy(CleanStringCharacters(answer), cs_answer, strlen(cs_answer));
  48                 CleanStringLength(answer) = strlen(cs_answer);
  49         }
  50 }
  51
  52 void cleanSetReadLineName(CleanString name){
  53         rl_readline_name = cleanStringToCString(name);
  54 }
  55
  56 void cleanUsingHistory(){
  57         using_history();
  58 }
  59
  60 void cleanGetState(int *offset, int *num, int *flags){
  61         *offset = history_get_history_state()->offset;
  62         *num = history_get_history_state()->length;
  63         *flags = history_get_history_state()->flags;
  64 }
  65
  66 void cleanGetHistoryItem(int num, CleanString *line, CleanString *timestamp){
  67         char *cs_line = history_get_history_state()->entries[num]->line;
  68         char *cs_stamp = history_get_history_state()->entries[num]->timestamp;
  69
  70         CleanStringVariable(cleanLine, strlen(cs_line));
  71         *line = (CleanString) cleanLine;
  72         memcpy(CleanStringCharacters(cleanLine), cs_line, strlen(cs_line));
  73         CleanStringLength(cleanLine) = strlen(cs_line);
  74
  75         CleanStringVariable(cleanTimestamp, strlen(cs_stamp));
  76         *timestamp = (CleanString) cleanTimestamp;
  77         memcpy(CleanStringCharacters(cleanTimestamp), cs_stamp, strlen(cs_stamp));
  78         CleanStringLength(cleanTimestamp) = strlen(cs_stamp);
  79 }
  80
  81 void cleanInitNewHistoryState(int offset, int flags, int num){
  82         if(history_state != NULL){
  83                 //we should test if we can recursively free the object
  84                 free(history_state);
  85         }
  86         history_state = (HISTORY_STATE *)malloc(sizeof(HISTORY_STATE));
  87         if(history_state == NULL){
  88                 printf("Not enough memory...\n");
  89                 exit(1);
  90         }
  91         HIST_ENTRY **entries = (HIST_ENTRY **)malloc(sizeof(HIST_ENTRY*)*num);
  92         if(entries == NULL){
  93                 printf("Not enough memory...\n");
  94                 exit(1);
  95         }
  96         for(int i = 0; i<num; i++){
  97                 entries[i] = (HIST_ENTRY *)malloc(sizeof(HIST_ENTRY));
  98         }
  99         history_state->offset = offset;
 100         history_state->entries = entries;
 101         history_state->length = num;
 102         history_state->size = num;
 103         history_state->flags = 0;
 104 }
 105
 106 void cleanSetNewHistoryEntry(int i, CleanString line, CleanString timestamp){
 107         char *cs_line = cleanStringToCString(line);
 108         char *cs_timestamp = cleanStringToCString(timestamp);
 109         history_state->entries[i]->line = cs_line;
 110         history_state->entries[i]->timestamp = cs_timestamp;
 111 }
 112
 113 void cleanCommitSetHistory(void){
 114         history_set_history_state(history_state);
 115 }
 116
 117 void cleanAddHistory(CleanString entry){
 118         char *cs_entry = cleanStringToCString(entry);
 119         add_history(cs_entry);
 120         free(cs_entry);
 121 }
 122
 123 void cleanClearHistory(){
 124         clear_history();
 125 }
 126
 127 int cleanHistorySearch(CleanString s, int dir){
 128         char *cs_s = cleanStringToCString(s);
 129         int ret = history_search(cs_s, dir);
 130         free(cs_s);
 131         return ret;
 132 }
 133
 134 int cleanHistorySearchPrefix(CleanString s, int dir){
 135         char *cs_s = cleanStringToCString(s);
 136         int ret = history_search_prefix(cs_s, dir);
 137         free(cs_s);
 138         return ret;
 139 }
 140
 141 int cleanHistorySearchPos(CleanString s, int dir, int pos){
 142         char *cs_s = cleanStringToCString(s);
 143         int ret = history_search_pos(cs_s, dir, pos);
 144         free(cs_s);
 145         return ret;
 146 }
 147
 148 int cleanReadHistory(CleanString path)
 149 {
 150         char *cs_path = cleanStringToCString(path);
 151         int errno = read_history(cs_path);
 152         free(cs_path);
 153         return errno;
 154 }
 155
 156 int cleanReadHistoryRange(CleanString path, int from, int to)
 157 {
 158         char *cs_path = cleanStringToCString(path);
 159         int errno = read_history_range(cs_path, from, to);
 160         free(cs_path);
 161         return errno;
 162 }
 163
 164 int cleanWriteHistory(CleanString path)
 165 {
 166         char *cs_path = cleanStringToCString(path);
 167         int errno = write_history(cs_path);
 168         free(cs_path);
 169         return errno;
 170 }
 171
 172 int cleanAppendHistory(int n, CleanString path)
 173 {
 174         char *cs_path = cleanStringToCString(path);
 175         int errno = append_history(n, cs_path);
 176         free(cs_path);
 177         return errno;
 178 }
 179
 180 int cleanHistoryTruncateFile(CleanString path, int nlines)
 181 {
 182         char *cs_path = cleanStringToCString(path);
 183         int errno = history_truncate_file(cs_path, nlines);
 184         free(cs_path);
 185         return errno;
 186 }