Helper read_file: Use size_t for sizes, and uint8_t for the contents.

ChangeLog

+2016-08-05  Niels Möller  <nisse@lysator.liu.se>
+
+	* examples/io.c (read_file): Use size_t for sizes, and uint8_t for
+	the contents.
+
 2016-08-04  Niels Möller  <nisse@lysator.liu.se>
 
 	* dsa-sign.c (dsa_sign): Return failure if p is even, so that an

examples/io.c

@@ -74,11 +74,11 @@ werror(const char *format, ...)
     }
 }
 
-unsigned
-read_file(const char *name, unsigned max_size, char **contents)
+size_t
+read_file(const char *name, size_t max_size, uint8_t **contents)
 {
-  unsigned size, done;
-  char *buffer;
+  size_t size, done;
+  uint8_t *buffer;
   FILE *f;
     
   f = fopen(name, "rb");
@@ -92,7 +92,7 @@ read_file(const char *name, unsigned max_size, char **contents)
 
   for (buffer = NULL, done = 0;; size *= 2)
     {
-      char *p;
+      uint8_t *p;
 
       if (max_size && size > max_size)
 	size = max_size;
@@ -167,7 +167,7 @@ int
 simple_random(struct yarrow256_ctx *ctx, const char *name)
 {
   unsigned length;
-  char *buffer;
+  uint8_t *buffer;
 
   if (name)
     length = read_file(name, 0, &buffer);

examples/io.h

@@ -52,8 +52,8 @@ werror(const char *format, ...) PRINTF_STYLE(1, 2);
  * treated as an error; return value is zero, and no space is
  * allocated. The returned data is NUL-terminated, for convenience. */
 
-unsigned
-read_file(const char *name, unsigned size, char **buffer);
+size_t
+read_file(const char *name, size_t size, uint8_t **buffer);
 
 int
 write_file(const char *name, unsigned size, const char *buffer);

examples/read_rsa_key.c

@@ -47,7 +47,7 @@ read_rsa_key(const char *name,
 	     struct rsa_private_key *priv)
 {
   unsigned length;
-  char *buffer;
+  uint8_t *buffer;
   int res;
   
   length = read_file(name, 0, &buffer);

examples/rsa-verify.c

@@ -44,7 +44,7 @@
 static int
 read_signature(const char *name, mpz_t s)
 {
-  char *buffer;
+  uint8_t *buffer;
   unsigned length;
   int res;
   
@@ -52,7 +52,7 @@ read_signature(const char *name, mpz_t s)
   if (!length)
     return 0;
 
-  res = (mpz_set_str(s, buffer, 16) == 0);
+  res = (mpz_set_str(s, (const char *) buffer, 16) == 0);
   free(buffer);
 
   return res;