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
  11 char *cleanStringToCString(CleanString s){
  12         unsigned long len = CleanStringLength(s);
  13         char *cs = (char *)malloc(len+1);
  14         if(cs == NULL){
  15                 printf("malloc failed...\n");
  16                 exit(1);
  17         }
  18         memcpy(cs, CleanStringCharacters(s), len);
  19         cs[len] = '\0';
  20         return cs;
  21 }
  22
  23 int cleanReadHistory(CleanString path)
  24 {
  25         char *cs_path = cleanStringToCString(path);
  26         int errno = read_history(cs_path);
  27         free(cs_path);
  28         return errno;
  29 }
  30
  31 int cleanReadHistoryRange(CleanString path, int from, int to)
  32 {
  33         char *cs_path = cleanStringToCString(path);
  34         int errno = read_history_range(cs_path, from, to);
  35         free(cs_path);
  36         return errno;
  37 }
  38
  39 int cleanWriteHistory(CleanString path)
  40 {
  41         char *cs_path = cleanStringToCString(path);
  42         int errno = write_history(cs_path);
  43         free(cs_path);
  44         return errno;
  45 }
  46
  47 int cleanAppendHistory(int n, CleanString path)
  48 {
  49         char *cs_path = cleanStringToCString(path);
  50         int errno = append_history(n, cs_path);
  51         free(cs_path);
  52         return errno;
  53 }
  54
  55 int cleanHistoryTruncateFile(CleanString path, int nlines)
  56 {
  57         char *cs_path = cleanStringToCString(path);
  58         int errno = history_truncate_file(cs_path, nlines);
  59         free(cs_path);
  60         return errno;
  61 }
  62
  63 void cleanReadLine(CleanString prompt, int history, CleanString *result)
  64 {
  65         char *cs_prompt = cleanStringToCString(prompt);
  66
  67         //Get the answer and add to history if not empty
  68         if(cs_answer){
  69                 free(cs_answer);
  70                 cs_answer = (char *)NULL;
  71         }
  72         cs_answer = readline(cs_prompt);
  73         free(cs_prompt);
  74         if(cs_answer && *cs_answer && history){
  75                 add_history(cs_answer);
  76         }
  77
  78         if(!cs_answer){ //In case of an EOF
  79                 CleanStringVariable(answer, 1);
  80                 *result = (CleanString) answer;
  81                 memcpy(CleanStringCharacters(answer), "", 1);
  82                 CleanStringLength(answer) = 1;
  83         } else { //In case of a proper response
  84                 CleanStringVariable(answer, strlen(cs_answer));
  85                 *result = (CleanString) answer;
  86                 memcpy(CleanStringCharacters(answer), cs_answer, strlen(cs_answer));
  87                 CleanStringLength(answer) = strlen(cs_answer);
  88         }
  89 }