2 * charfuncs.c - Routines for dealing with character streams.
4 * Jonathan McDowell <noodles@earth.li>
6 * Copyright 2002 Project Purple
8 * $Id: charfuncs.c,v 1.2 2003/06/04 20:57:07 noodles Exp $
11 #include <sys/types.h>
15 #include "charfuncs.h"
18 * buffer_fetchchar - Fetches a char from a buffer.
19 * @ctx: Our buffer context structure.
20 * @count: The number of characters to get from the buffer.
21 * @c: Where to put the characters retrieved.
23 int buffer_fetchchar(void *ctx, size_t count, unsigned char *c)
25 struct buffer_ctx *buf = NULL;
28 buf = (struct buffer_ctx *) ctx;
29 for (i = 0; i < count; i++) {
30 c[i] = buf->buffer[buf->offset++];
33 return (((buf->offset) == (buf->size)) ? 1 : 0);
37 * buffer_putchar - Puts a char to a buffer.
38 * @ctx: Our buffer context structure.
39 * @count: The number of characters to put into the buffer.
40 * @c: The characters to add to the buffer.
42 * Adds characters to the buffer references by the buffer context. If we
43 * fill it then we double the size of the current buffer and then add the
46 int buffer_putchar(void *ctx, size_t count, unsigned char *c)
48 struct buffer_ctx *buf = NULL;
52 buf = (struct buffer_ctx *) ctx;
54 for (newsize = buf->size; newsize < (buf->offset + count);
57 if (newsize != buf->size) {
58 buf->buffer = realloc(buf->buffer, newsize);
62 for (i = 0; i < count; i++) {
63 buf->buffer[buf->offset++] = c[i];
70 * file_fetchchar - Fetches a char from a file.
72 int file_fetchchar(void *fd, size_t count, unsigned char *c)
74 return !(read( *(int *) fd, c, count));
78 * file_putchar - Puts a char to a file.
80 int file_putchar(void *fd, size_t count, unsigned char *c)
82 return !(write( *(int *) fd, c, count));