add common _strtoi function body

1 files changed, 43 insertions, 0 deletions

diff --git a/src/stdlib/_strtoi.h b/src/stdlib/_strtoi.h
new file mode 100644
index 00000000..7a2d5cdf
--- /dev/null
+++ b/src/stdlib/_strtoi.h
@@ -0,0 +1,43 @@
+	/* int iswide = (sizeof(*nptr) == sizeof(wchar_t)); */
+	(void)max;
+	
+	if (base == 0) {
+		/* determine base from prefix */
+	}
+
+	if (min == 0) {
+		/* unsigned */
+	}
+
+	while (*nptr) {
+		int n = 0;
+		/* int c = iswide ? wctomb(*nptr) : *nptr; */
+
+		switch (*nptr) {
+		case '0': n = 0; break;
+		case '1': n = 1; break;
+		case '2': n = 2; break;
+		case '3': n = 3; break;
+		case '4': n = 4; break;
+		case '5': n = 5; break;
+		case '6': n = 6; break;
+		case '7': n = 7; break;
+		case '8': n = 8; break;
+		case '9': n = 9; break;
+		case 'a': case 'A': n = 0xa; break;
+		case 'b': case 'B': n = 0xb; break;
+		case 'c': case 'C': n = 0xc; break;
+		case 'd': case 'D': n = 0xd; break;
+		case 'e': case 'E': n = 0xe; break;
+		case 'f': case 'F': n = 0xf; break;
+		default: n = -1; break;
+		}
+
+		if (n >= base || n < 0) {
+			*endptr = (void*)nptr;
+			break;
+		}
+
+		ret = (ret * base) + n;
+		nptr++;
+	}