musl: make strtoll() accept strings start with dot

glibc accepts strings start with '.' and returns 0, but musl refuses
them. Let's accept them, as our code assumes the function accept such
strings.

diff --git a/src/include/musl/stdlib.h b/src/include/musl/stdlib.h
new file mode 100644 (file)
index 0000000..ecfd6cc
--- /dev/null
+++ b/src/include/musl/stdlib.h
@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include_next <stdlib.h>
+
+long long strtoll_fallback(const char *nptr, char **endptr, int base);
+#define strtoll strtoll_fallback

diff --git a/src/libc/musl/meson.build b/src/libc/musl/meson.build
index 78f93c35421a6cc548119527757fcfbfdc651ac8..54866a8b612766565879bf61513fb7b0b2d1286f 100644 (file)
--- a/src/libc/musl/meson.build
+++ b/src/libc/musl/meson.build
@@ -6,5 +6,6 @@ endif
 
 libc_wrapper_sources += files(
         'stdio.c',
+        'stdlib.c',
         'string.c',
 )

diff --git a/src/libc/musl/stdlib.c b/src/libc/musl/stdlib.c
new file mode 100644 (file)
index 0000000..1106fec
--- /dev/null
+++ b/src/libc/musl/stdlib.c
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <stdlib.h>
+
+/* The header stdlib.h overrides strtoll with strtoll_fallback, hence we need to undef it here. */
+#undef strtoll
+
+long long strtoll_fallback(const char *nptr, char **endptr, int base) {
+        /* glibc returns 0 if the first character is '.' without error, but musl returns as an error.
+         * As our code assumes the glibc behavior, let's accept strings start with '.'. */
+        if (nptr && *nptr == '.') {
+                if (endptr)
+                        *endptr = (char*) nptr;
+                return 0;
+        }
+
+        /* Otherwise, use the native strtoll(). */
+        return strtoll(nptr, endptr, base);
+}