X-Git-Url: https://pd.if.org/git/?p=pd_readline;a=blobdiff_plain;f=readfile.c;fp=readfile.c;h=c20033428571190f1e798462a02d045ef32571e8;hp=0000000000000000000000000000000000000000;hb=4bb27266f935c9aafad6870ffc8847fc65c8120f;hpb=3f771e17236364ded86e96ee64f99344337991f8

diff --git a/readfile.c b/readfile.c
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+++ 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; 
+
+}  
+
+
+
+
+
+
+ 
+
+