Switch charfuncs to returning number of read/written characters

[onak.git] / charfuncs.c

diff --git a/charfuncs.c b/charfuncs.c
index 3aee0b00b7374d0d9951e531831769d0dcb522ba..59c8ca39e55d5cb519a063fe0bff0f3a1a9515b1 100644 (file)
--- a/charfuncs.c
+++ b/charfuncs.c
@@ -29,20 +29,20 @@
  *     @count: The number of characters to get from the buffer.
  *     @c: Where to put the characters retrieved.
  */
-int buffer_fetchchar(void *ctx, size_t count, void *c)
+size_t buffer_fetchchar(void *ctx, size_t count, void *c)
 {
        struct buffer_ctx *buf = NULL;
        
        buf = (struct buffer_ctx *) ctx;
 
        if (buf->offset + count > buf->size) {
-               return 1;
+               count = buf->size - buf->offset;
        }
-       
+
        memcpy(c, &buf->buffer[buf->offset], count);
        buf->offset += count;
 
-       return 0;
+       return count;
 }
 
 /*
@@ -55,7 +55,7 @@ int buffer_fetchchar(void *ctx, size_t count, void *c)
  *     fill it then we double the size of the current buffer and then add the
  *     rest.
  */
-int buffer_putchar(void *ctx, size_t count, void *c)
+size_t buffer_putchar(void *ctx, size_t count, void *c)
 {
        struct buffer_ctx *buf = NULL;
        size_t newsize = 0;
@@ -73,37 +73,41 @@ int buffer_putchar(void *ctx, size_t count, void *c)
        memcpy(&buf->buffer[buf->offset], c, count);
        buf->offset += count;
        
-       return 1;
+       return count;
 }
 
 /*
  * Fetches a char from a file.
  */
-int file_fetchchar(void *fd, size_t count, void *c)
+size_t file_fetchchar(void *fd, size_t count, void *c)
 {
-       return !(read( *(int *) fd, c, count));
+       ssize_t ret = read( *(int *) fd, c, count);
+
+       return (ret > 0) ? ret : 0;
 }
 
 /*
  * Puts a char to a file.
  */
-int file_putchar(void *fd, size_t count, void *c)
+size_t file_putchar(void *fd, size_t count, void *c)
 {
-       return !(write( *(int *) fd, c, count));
+       size_t ret = write( *(int *) fd, c, count);
+
+       return (ret > 0) ? ret : 0;
 }
 
 /*
  * Gets a char from stdin.
  */
-int stdin_getchar(__unused void *ctx, size_t count, void *c)
+size_t stdin_getchar(__unused void *ctx, size_t count, void *c)
 {
-       return (fread(c, 1, count, stdin) != count);
+       return fread(c, 1, count, stdin);
 }
 
 /*
  * Puts a char to stdout.
  */
-int stdout_putchar(__unused void *ctx, size_t count, void *c)
+size_t stdout_putchar(__unused void *ctx, size_t count, void *c)
 {
-       return (fwrite(c, 1, count, stdout) != count);
+       return fwrite(c, 1, count, stdout);
 }