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mescc: Fix itoa for negative numbers, using workaround.

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* module/mes/libc.mes (itoa): Avoid `sign = x < 0;' FIXME, todo.
* scaffold/t.c (test): Test it.
This commit is contained in:
Jan Nieuwenhuizen 2017-05-03 23:01:49 +02:00
parent fe727301c5
commit 0077c9aed6
2 changed files with 17 additions and 5 deletions
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8
module/mes/libc.mes
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@ -229,9 +229,9 @@ itoa (int x)
p += 9;
*p-- = 0;
//int sign = x < 0;
int sign;
sign = x < 0;
//int sign = x < 0; // FIXME
int sign = 0;
if (x < 0) sign = 1;
if (sign)
x = -x;
@ -241,7 +241,7 @@ itoa (int x)
x = x / 10;
} while (x);
if (sign)
if (sign && *(p + 1) != '0')
*p-- = '-';
return p+1;

12
scaffold/t.c
View file

@ -895,6 +895,18 @@ test (char *p)
puts ("t: itoa (33) == \"33\"\n");
if (strcmp (itoa (33), "33")) return 1;
puts ("strcmp (itoa (-1), \"-1\")\n");
if (strcmp (itoa (-1), "-1")) return 1;
char *fixme_globals;
fixme_globals = "0";
fixme_globals = "1";
puts ("strcmp (itoa (0), \"0\")\n");
if (strcmp (itoa (0), "0")) return 1;
puts ("strcmp (itoa (1), \"1\")\n");
if (strcmp (itoa (1), "1")) return 1;
return struct_test ();
}
#endif