Migrate to using musl 0.9.13 libc atoi, atol and atoll for better asm.js performance.

5 files changed, 53 insertions, 0 deletions

diff --git a/system/lib/libc.symbols b/system/lib/libc.symbols
index 53a27082..eb2053ce 100644
--- a/system/lib/libc.symbols
+++ b/system/lib/libc.symbols
@@ -50,6 +50,8 @@
          T __towrite
          T __uflow
          T atof
+         T atoi
+         T atol
          W bulk_free
          W calloc
          W free
diff --git a/system/lib/libc/musl/src/stdlib/atoi.c b/system/lib/libc/musl/src/stdlib/atoi.c
new file mode 100644
index 00000000..9baca7b8
--- /dev/null
+++ b/system/lib/libc/musl/src/stdlib/atoi.c
@@ -0,0 +1,16 @@
+#include <stdlib.h>
+#include <ctype.h>
+
+int atoi(const char *s)
+{
+	int n=0, neg=0;
+	while (isspace(*s)) s++;
+	switch (*s) {
+	case '-': neg=1;
+	case '+': s++;
+	}
+	/* Compute n as a negative number to avoid overflow on INT_MIN */
+	while (isdigit(*s))
+		n = 10*n - (*s++ - '0');
+	return neg ? n : -n;
+}
diff --git a/system/lib/libc/musl/src/stdlib/atol.c b/system/lib/libc/musl/src/stdlib/atol.c
new file mode 100644
index 00000000..140ea3ea
--- /dev/null
+++ b/system/lib/libc/musl/src/stdlib/atol.c
@@ -0,0 +1,17 @@
+#include <stdlib.h>
+#include <ctype.h>
+
+long atol(const char *s)
+{
+	long n=0;
+	int neg=0;
+	while (isspace(*s)) s++;
+	switch (*s) {
+	case '-': neg=1;
+	case '+': s++;
+	}
+	/* Compute n as a negative number to avoid overflow on LONG_MIN */
+	while (isdigit(*s))
+		n = 10*n - (*s++ - '0');
+	return neg ? n : -n;
+}
diff --git a/system/lib/libc/musl/src/stdlib/atoll.c b/system/lib/libc/musl/src/stdlib/atoll.c
new file mode 100644
index 00000000..b6930489
--- /dev/null
+++ b/system/lib/libc/musl/src/stdlib/atoll.c
@@ -0,0 +1,17 @@
+#include <stdlib.h>
+#include <ctype.h>
+
+long long atoll(const char *s)
+{
+	long long n=0;
+	int neg=0;
+	while (isspace(*s)) s++;
+	switch (*s) {
+	case '-': neg=1;
+	case '+': s++;
+	}
+	/* Compute n as a negative number to avoid overflow on LLONG_MIN */
+	while (isdigit(*s))
+		n = 10*n - (*s++ - '0');
+	return neg ? n : -n;
+}
diff --git a/system/lib/libcextra.symbols b/system/lib/libcextra.symbols
index 096b261d..4018b3e2 100644
--- a/system/lib/libcextra.symbols
+++ b/system/lib/libcextra.symbols
@@ -22,6 +22,7 @@
          T __wcscoll_l
          T __wcsxfrm_l
          W __wctype_l
+         T atoll
          T bsearch
          T btowc
          T ecvt