diff options
Diffstat (limited to 'printf.c')
| -rw-r--r-- | printf.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/printf.c b/printf.c new file mode 100644 index 0000000..7c9cf3a --- /dev/null +++ b/printf.c @@ -0,0 +1,32 @@ +int printf(char *fmt) { + char *arg, ch; + arg = (int)&fmt + sizeof(char*); + while ((ch = *fmt)) + { + if (ch == '%') + { + ch = *(++fmt); + if (ch == 'd') + __print_int(*(int *)arg); + else if (ch == 'c') + __print_char(*(char *)arg); + else if (ch == 's') + __print_string(*(char **)arg); + else + { + int len, x = *(int *)arg; + if (!x) len = 1; + else + for (len = 0; x; x /= 10, len++); + len = 4 - len; + while (len) __print_char('0'), len--; + __print_int(*(int *)arg); + fmt += 2; + } + arg += 4; + } + else __print_char(ch); + fmt++; + } +} + |