Add a new format string to print in cowsay format.
Signed-off-by: Richard Weinberger <[email protected]>
---
lib/vsprintf.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 52 insertions(+)
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index d7a708f82559..a48df6f1c3f0 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -1693,6 +1693,55 @@ static int __init initialize_ptr_random(void)
}
early_initcall(initialize_ptr_random);
+static char *cowsay(char *buf, char *end, void *ptr)
+{
+ static char dashes[] = {[0 ... 256] = '-'};
+ static char unders[] = {[0 ... 256] = '_'};
+ static char spaces[] = {[0 ... 256] = ' '};
+ static struct cow_type {
+ int num_lines;
+ char *cow_lines[];
+ } default_cow = {
+ .num_lines = 5,
+ .cow_lines = {
+ "\\ ^__^",
+ " \\ (oo)\\_______",
+ " (__)\\ )\\/\\",
+ " ||----w |",
+ " || ||",
+ },
+ };
+
+ int i, n;
+ char *orig_buf = buf;
+ char *str = ptr;
+ int len = strlen(str);
+
+ n = snprintf(buf, end - buf, " %.*s\n< %s >\n %.*s\n", len, unders,
+ str, len, dashes);
+ if (n < 0 || buf + n >= end)
+ goto cow_too_fat;
+
+ buf += n;
+
+ for (i = 0; i < default_cow.num_lines; i++) {
+ n = snprintf(buf, end - buf, "%.*s%s\n", len / 2, spaces,
+ default_cow.cow_lines[i]);
+ if (n < 0 || buf + n >= end)
+ goto cow_too_fat;
+
+ buf += n;
+ }
+
+ return buf;
+
+cow_too_fat:
+ n = snprintf(orig_buf, end - orig_buf, "%s\n", str);
+ if (n > 0)
+ orig_buf += n;
+ return orig_buf;
+}
+
/* Maps a pointer to a 32 bit unique identifier. */
static char *ptr_to_id(char *buf, char *end, void *ptr, struct printf_spec
spec)
{
@@ -1941,6 +1990,9 @@ char *pointer(const char *fmt, char *buf, char *end, void
*ptr,
case 'd':
return dentry_name(buf, end, ptr, spec, fmt);
case 'C':
+ if (fmt[1] == 'O' && fmt[2] == 'W')
+ return cowsay(buf, end, ptr);
+
return clock(buf, end, ptr, spec, fmt);
case 'D':
return dentry_name(buf, end,
--
2.13.6
