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mescc: Support gcc-3.4.0: *printf: Support `%n'.

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* lib/libc+tcc.c (vfprintf, vsprintf): Support `%n'.  For Gcc 3.4.0.
* scaffold/tests/70-printf.c: Test it.
This commit is contained in:
Jan Nieuwenhuizen 2018-06-06 19:29:32 +02:00
parent f4616dfef1
commit 7c4a6a88ed
No known key found for this signature in database
GPG key ID: F3C1A0D9C1D65273
2 changed files with 73 additions and 13 deletions
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74
lib/libc+tcc.c
View file

@ -576,9 +576,13 @@ vfprintf (FILE* f, char const* format, va_list ap)
{
int fd = (int)f;
char const *p = format;
int count = 0;
while (*p)
if (*p != '%')
fputc (*p++, fd);
{
count++;
fputc (*p++, fd);
}
else
{
p++;
@ -618,7 +622,7 @@ vfprintf (FILE* f, char const* format, va_list ap)
c = *++p;
switch (c)
{
case '%': {fputc (*p, fd); break;}
case '%': {fputc (*p, fd); count++; break;}
case 'c': {char c; c = va_arg (ap, int); fputc (c, fd); break;}
case 'd':
case 'i':
@ -638,15 +642,22 @@ vfprintf (FILE* f, char const* format, va_list ap)
width = width - strlen (s);
if (!left_p && !precision_p)
while (!precision_p && width-- > 0)
fputc (pad, f);
{
fputc (pad, f);
count++;
}
while (*s)
{
if (precision_p && width-- == 0)
break;
fputc (*s++, f);
count++;
}
while (!precision_p && width-- > 0)
fputc (pad, f);
{
fputc (pad, f);
count++;
}
break;
}
case 's':
@ -656,15 +667,28 @@ vfprintf (FILE* f, char const* format, va_list ap)
width = width - strlen (s);
if (!left_p && !precision_p)
while (!precision_p && width-- > 0)
fputc (pad, f);
{
fputc (pad, f);
count++;
}
while (*s)
{
if (precision_p && width-- == 0)
break;
fputc (*s++, f);
count++;
}
while (!precision_p && width-- > 0)
fputc (pad, f);
{
fputc (pad, f);
count++;
}
break;
}
case 'n':
{
int *n = va_arg (ap, int *);
*n = count;
break;
}
default:
@ -741,9 +765,13 @@ int
vsprintf (char *str, char const* format, va_list ap)
{
char const *p = format;
int count = 0;
while (*p)
if (*p != '%')
*str++ = *p++;
{
*str++ = *p++;
count++;
}
else
{
p++;
@ -783,8 +811,8 @@ vsprintf (char *str, char const* format, va_list ap)
c = *++p;
switch (c)
{
case '%': {*str++ = *p; break;}
case 'c': {c = va_arg (ap, int); *str++ = c; break;}
case '%': {*str++ = *p; count++; break;}
case 'c': {c = va_arg (ap, int); *str++ = c; count++; break;}
case 'd':
case 'i':
case 'o':
@ -803,15 +831,22 @@ vsprintf (char *str, char const* format, va_list ap)
width = width - strlen (s);
if (!left_p && !precision_p)
while (!precision_p && width-- > 0)
*str++ = pad;
{
*str++ = pad;
count++;
}
while (*s)
{
if (precision_p && width-- == 0)
break;
*str++ = *s++;
count++;
}
while (!precision_p && width-- > 0)
*str++ = pad;
{
*str++ = pad;
count++;
}
break;
}
case 's':
@ -821,15 +856,28 @@ vsprintf (char *str, char const* format, va_list ap)
width = width - strlen (s);
if (!left_p && !precision_p)
while (!precision_p && width-- > 0)
*str++ = pad;
{
*str++ = pad;
count++;
}
while (*s)
{
if (precision_p && width-- == 0)
break;
*str++ = *s++;
count++;
}
while (!precision_p && width-- > 0)
*str++ = pad;
{
*str++ = pad;
count++;
}
break;
}
case 'n':
{
int *n = va_arg (ap, int *);
*n = count;
break;
}
default:

12
scaffold/tests/70-printf.c
View file

@ -134,5 +134,17 @@ test ()
if (strcmp (buf, ">>C<<\n"))
return 19;
int n;
fprintf (stderr, "foo bar\n%n", &n);
if (n != 8)
return 20;
sprintf (buf, "foo%nbar\n", &n);
eputs ("buf="); eputs (buf); eputs ("\n");
if (strcmp (buf, "foobar\n"))
return 21;
if (n != 3)
return 22;
return 0;
}