71 lines
2 KiB
C
71 lines
2 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* tf_printf.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: mcolonna <marvin@42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2023/10/11 16:07:21 by mcolonna #+# #+# */
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/* Updated: 2024/02/12 12:36:08 by mcolonna ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "tf_printf.h"
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#include "stream.h"
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#include "do_conversion.h"
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#include <stdarg.h>
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#include <stdlib.h>
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#include <unistd.h>
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// Print the escaped string (with %) from str at i.
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// str[i] must be a '%'.
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// Return the number of chars wrote.
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// Return a negative value if error.
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static int print_esc(va_list args, t_stream_2 *stream)
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{
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int r;
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stream_2_next(stream);
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r = do_conversion(args, stream_2_getchar(stream));
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stream_2_next(stream);
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return (r);
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}
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// Count the number of chars until a '%' or the end of the string.
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static int txt_len(const char *str)
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{
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int i;
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i = 0;
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while (str[i] && str[i] != '%')
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i++;
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return (i);
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}
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int tf_printf(const char *str, ...)
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{
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va_list args;
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t_stream_2 *stream;
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int count;
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int len;
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va_start(args, str);
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stream = stream_2_new(str);
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if (!stream)
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return (-1);
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count = 0;
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while (stream_2_continues(stream))
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{
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len = txt_len(stream_2_pointer(stream));
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write(1, stream_2_pointer(stream), len);
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stream_2_skip(stream, len);
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count += len;
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if (!stream_2_getchar(stream))
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break ;
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len = print_esc(args, stream);
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if (len == -1)
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return (free(stream), -1);
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count += len;
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}
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return (free(stream), count);
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}
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