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                 free(history_state);
  84         }
  85         history_state = (HISTORY_STATE *)malloc(sizeof(HISTORY_STATE));
  86         if(history_state == NULL){
  87                 printf("Not enough memory...\n");
  88                 exit(1);
  89         }
  90         HIST_ENTRY **entries = (HIST_ENTRY **)malloc(sizeof(HIST_ENTRY*)*num);
  91         if(entries == NULL){
  92                 printf("Not enough memory...\n");
  93                 exit(1);
  94         }
  95         for(int i = 0; i<num; i++){
  96                 entries[i] = (HIST_ENTRY *)malloc(sizeof(HIST_ENTRY));
  97         }
  98         history_state->offset = offset;
  99         history_state->entries = entries;
 100         history_state->length = num;
 101         history_state->size = num;
 102         history_state->flags = 0;
 103 }
 104
 105 void cleanSetNewHistoryEntry(int i, CleanString line, CleanString timestamp){
 106         char *cs_line = cleanStringToCString(line);
 107         char *cs_timestamp = cleanStringToCString(timestamp);
 108         history_state->entries[i]->line = cs_line;
 109         history_state->entries[i]->timestamp = cs_timestamp;
 110 }
 111
 112 void cleanCommitSetHistory(void){
 113         history_set_history_state(history_state);
 114 }
 115
 116 void cleanAddHistory(CleanString entry){
 117         char *cs_entry = cleanStringToCString(entry);
 118         add_history(cs_entry);
 119         free(cs_entry);
 120 }
 121
 122 void cleanClearHistory(){
 123         clear_history();
 124 }
 125
 126 int cleanHistorySearch(CleanString s, int dir){
 127         char *cs_s = cleanStringToCString(s);
 128         int ret = history_search(cs_s, dir);
 129         free(cs_s);
 130         return ret;
 131 }
 132
 133 int cleanHistorySearchPrefix(CleanString s, int dir){
 134         char *cs_s = cleanStringToCString(s);
 135         int ret = history_search_prefix(cs_s, dir);
 136         free(cs_s);
 137         return ret;
 138 }
 139
 140 int cleanHistorySearchPos(CleanString s, int dir, int pos){
 141         char *cs_s = cleanStringToCString(s);
 142         int ret = history_search_pos(cs_s, dir, pos);
 143         free(cs_s);
 144         return ret;
 145 }
 146
 147 int cleanReadHistory(CleanString path)
 148 {
 149         char *cs_path = cleanStringToCString(path);
 150         int errno = read_history(cs_path);
 151         free(cs_path);
 152         return errno;
 153 }
 154
 155 int cleanReadHistoryRange(CleanString path, int from, int to)
 156 {
 157         char *cs_path = cleanStringToCString(path);
 158         int errno = read_history_range(cs_path, from, to);
 159         free(cs_path);
 160         return errno;
 161 }
 162
 163 int cleanWriteHistory(CleanString path)
 164 {
 165         char *cs_path = cleanStringToCString(path);
 166         int errno = write_history(cs_path);
 167         free(cs_path);
 168         return errno;
 169 }
 170
 171 int cleanAppendHistory(int n, CleanString path)
 172 {
 173         char *cs_path = cleanStringToCString(path);
 174         int errno = append_history(n, cs_path);
 175         free(cs_path);
 176         return errno;
 177 }
 178
 179 int cleanHistoryTruncateFile(CleanString path, int nlines)
 180 {
 181         char *cs_path = cleanStringToCString(path);
 182         int errno = history_truncate_file(cs_path, nlines);
 183         free(cs_path);
 184         return errno;
 185 }
 186