# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1480782884 -3600
# Node ID 3a519b510333b3891110587bf2ce47a2b20cf3f6
# Parent  eb828fda0a2fda5d8ab0a01097a60097e09972ae
Fixed int serialisation to string again. Also added maxint and minint accessors.

diff -r eb828fda0a2f -r 3a519b510333 lib/native.py
--- a/lib/native.py	Sat Dec 03 17:16:15 2016 +0100
+++ b/lib/native.py	Sat Dec 03 17:34:44 2016 +0100
@@ -31,6 +31,11 @@
 def _is(x, y): pass
 def _is_not(x, y): pass
 
+# Limit definition.
+
+def _get_maxint(): pass
+def _get_minint(): pass
+
 # Integer operations.
 
 def _int_add(self, other): pass
diff -r eb828fda0a2f -r 3a519b510333 lib/sys.py
--- a/lib/sys.py	Sat Dec 03 17:16:15 2016 +0100
+++ b/lib/sys.py	Sat Dec 03 17:34:44 2016 +0100
@@ -19,7 +19,12 @@
 this program.  If not, see <http://www.gnu.org/licenses/>.
 """
 
-from native import _exit, _get_argv, _get_path
+import native
+
+# Limits.
+
+maxint = native._get_maxint()
+minint = native._get_minint()
 
 # Standard streams.
 
@@ -29,12 +34,12 @@
 
 # NOTE: Environment details to be implemented.
 
-argv = _get_argv()
-path = _get_path()
+argv = native._get_argv()
+path = native._get_path()
 
 # Functions to be implemented natively.
 
 def exit(status=0):
-    _exit(int(status))
+    native._exit(int(status))
 
 # vim: tabstop=4 expandtab shiftwidth=4
diff -r eb828fda0a2f -r 3a519b510333 templates/native.c
--- a/templates/native.c	Sat Dec 03 17:16:15 2016 +0100
+++ b/templates/native.c	Sat Dec 03 17:34:44 2016 +0100
@@ -103,6 +103,20 @@
     return x->value != y->value ? __builtins___boolean_True : __builtins___boolean_False;
 }
 
+__attr __fn_native__get_maxint(__attr __args[])
+{
+    __attr * const status = &__args[1];
+
+    return __new_int(INT_MAX);
+}
+
+__attr __fn_native__get_minint(__attr __args[])
+{
+    __attr * const status = &__args[1];
+
+    return __new_int(INT_MIN);
+}
+
 __attr __fn_native__int_add(__attr __args[])
 {
     __attr * const _data = &__args[1];
@@ -332,10 +346,11 @@
     __attr * const _data = &__args[1];
     /* _data interpreted as int */
     int i = _data->intvalue;
-    int n = i != 0 ? (int) ceil(log10(abs(i)+1)) + 1 : 2;
+    /* Employ a buffer big enough to fit the largest integer plus an extra
+       character, a minus sign, and the null terminator. */
+    unsigned int n = (int) log10(INT_MAX) + 3;
     char *s = (char *) __ALLOCATE(n, sizeof(char));
 
-    if (i < 0) n++;
     snprintf(s, n, "%d", i);
 
     /* Return a new string. */
diff -r eb828fda0a2f -r 3a519b510333 templates/native.h
--- a/templates/native.h	Sat Dec 03 17:16:15 2016 +0100
+++ b/templates/native.h	Sat Dec 03 17:34:44 2016 +0100
@@ -10,6 +10,9 @@
 __attr __fn_native__is(__attr __args[]);
 __attr __fn_native__is_not(__attr __args[]);
 
+__attr __fn_native__get_maxint(__attr __args[]);
+__attr __fn_native__get_minint(__attr __args[]);
+
 __attr __fn_native__int_add(__attr __args[]);
 __attr __fn_native__int_div(__attr __args[]);
 __attr __fn_native__int_mod(__attr __args[]);
diff -r eb828fda0a2f -r 3a519b510333 tests/numbers.py
--- a/tests/numbers.py	Sat Dec 03 17:16:15 2016 +0100
+++ b/tests/numbers.py	Sat Dec 03 17:34:44 2016 +0100
@@ -1,3 +1,10 @@
+import sys
+
+print sys.maxint
+print sys.minint
+
+print sys.maxint + sys.minint
+
 i = 2 ** 30
 print i                                 # 1073741824