Getting close to a basic working readline now.

[pd_readline] / readfile.c

diff --git a/readfile.c b/readfile.c
new file mode 100644 (file)
index 0000000..c200334
--- /dev/null
+++ b/readfile.c
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+
+
+
+/* readfile.c  */ 
+
+/* Check that a file exists. */ 
+/* If it does, read it into an array and print it out. */ 
+
+
+#include <string.h>   
+#include <stdio.h> 
+
+
+
+/*  Helper function, to let us see if a file */ 
+/*  exists in the current directory.  */ 
+int fexists(char *fname)
+{  
+   FILE *fptr;  
+   fptr = fopen(fname, "r") ;     
+   if ( !fptr )  return -1 ;  /* File does not exist in dir. */                 
+   fclose(fptr);  
+   return 0;    /* File DOES exist in dir.  */   
+} 
+
+
+/* Helper function to chop newlines off the lines read in. */ 
+/* Without this being done, an extra newline is inserted */ 
+/* (which is usually not what is wanted). */ 
+void chop(char *s)
+{
+  s[strcspn(s,"\n")] = '\0';
+}
+
+
+/* An array to store the file in. */ 
+/* Only 20 lines are read. */ 
+char myarray[20][80];  
+
+
+/* Read the file into the array of strings.  */ 
+void readfile(char *fname) 
+{ 
+   int retval = fexists(fname); 
+        
+   int i; 
+   if (retval == 0) { 
+         /* File exists, so open it. */  
+         /* We open it in read-write mode so we can */ 
+         /* append new commands to it. */ 
+         FILE *fptr;  
+         fptr = fopen(fname, "rw"); 
+                          
+         for(i=0; i<20; i++)  
+         {  
+               chop(fgets(myarray[i], 80, fptr) );  
+         }
+         
+   }  /* retval == 0  */          
+       
+       else puts("Error! File does not exist. \n");  
+       
+}      
+
+
+void printfile(void) 
+{ 
+  int j; 
+       
+  for(j=0; j<10; j++) 
+     { 
+        puts(myarray[j]);      
+     }    
+               
+}      
+
+
+
+int main(void) 
+{ 
+
+readfile("test.txt"); 
+
+printfile(); 
+
+
+return 0; 
+
+}  
+
+
+
+
+
+
+ 
+
+