inttypes: add strtoimax and strtoumax

CMakeLists.txt

@@ -88,6 +88,8 @@ set(SOURCES
   # inttypes
   src/libc/inttypes/imaxabs.c
   src/libc/inttypes/imaxdiv.c
+  src/libc/inttypes/strtoimax.c
+  src/libc/inttypes/strtoumax.c
   # locale
   src/libc/locale/setlocale.c
   src/libc/locale/localeconv.c

STATUS

@@ -47,7 +47,7 @@ DONE:       Function/symbol/macro is defined, builds, links, and is tested
     7.8.1   SCN* macros: LDEPS(*scanf)
     7.8.2.1 imaxabs: DONE
     7.8.2.2 imaxdiv: DONE
-    7.8.2.3 strotimax strtoumax: TODO
+    7.8.2.3 strtoimax strtoumax: DONE
     7.8.2.4 wcstoimax wcstoumax: TODO
 
 7.9 <iso646.h>

include/inttypes.h

@@ -243,4 +243,16 @@ extern intmax_t imaxabs(intmax_t __j);
 extern imaxdiv_t imaxdiv(intmax_t __num, intmax_t __denom);
 #define imaxdiv lldiv
 
+/* Parse an intmax_t from string. */
+extern intmax_t strtoimax(
+	char const * restrict __ptr,
+	char ** restrict __endptr,
+	int __base);
+
+/* Parse an uintmax_t from string. */
+extern uintmax_t strtoumax(
+	char const * restrict __ptr,
+	char ** restrict __endptr,
+	int __base);
+
 #endif /*__INTTYPES_H__*/

src/libc/inttypes/strtoimax.c

@@ -0,0 +1,16 @@
+#include <inttypes.h>
+#include <stdlib.h>
+
+#if __INTMAX_WIDTH__ == __LONG_WIDTH__
+# define __strtoimax strtol
+#elif __INTMAX_WIDTH__ == __LONG_LONG_WIDTH__
+# define __strtoimax strtoll
+#else
+# error How is intmax_t neither long nor long long?
+#endif
+
+intmax_t strtoimax(char const * restrict ptr, char ** restrict endptr,
+	int base)
+{
+	return __strtoimax(ptr, endptr, base);
+}

src/libc/inttypes/strtoumax.c

@@ -0,0 +1,16 @@
+#include <inttypes.h>
+#include <stdlib.h>
+
+#if __INTMAX_WIDTH__ == __LONG_WIDTH__
+# define __strtoumax strtoul
+#elif __INTMAX_WIDTH__ == __LONG_LONG_WIDTH__
+# define __strtoumax strtoull
+#else
+# error How is uintmax_t neither unsigned long nor unsigned long long?
+#endif
+
+uintmax_t strtoumax(char const * restrict ptr, char ** restrict endptr,
+	int base)
+{
+	return __strtoumax(ptr, endptr, base);
+}