[BUILTIN] Use intmax_t arithmetic in test

This patch adds the function atomax10 and uses it in test(1) so that we
support intmax_t comparisons.

3 files changed, 40 insertions, 27 deletions

diff --git a/src/bltin/test.c b/src/bltin/test.c
index 7d49569..bc8b175 100644
--- a/src/bltin/test.c
+++ b/src/bltin/test.c
@@ -11,8 +11,7 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 
-#include <ctype.h>
-#include <errno.h>
+#include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
@@ -145,13 +144,17 @@ static int binop(void);
 static int filstat(char *, enum token);
 static enum token t_lex(char *);
 static int isoperand(void);
-static int getn(const char *);
 static int newerf(const char *, const char *);
 static int olderf(const char *, const char *);
 static int equalf(const char *, const char *);
 static int test_st_mode(const struct stat64 *, int);
 static int bash_group_member(gid_t);
 
+static inline intmax_t getn(const char *s)
+{
+	return atomax10(s);
+}
+
 int
 testcmd(int argc, char **argv)
 {
@@ -396,28 +399,6 @@ isoperand(void)
 	return 0;
 }
 
-/* atoi with error detection */
-static int
-getn(const char *s)
-{
-	char *p;
-	long r;
-
-	errno = 0;
-	r = strtol(s, &p, 10);
-
-	if (errno != 0)
-		error("%s: out of range", s);
-
-	while (isspace((unsigned char)*p))
-	      p++;
-
-	if (*p)
-		error("%s: bad number", s);
-
-	return (int) r;
-}
-
 static int
 newerf (const char *f1, const char *f2)
 {
diff --git a/src/mystring.c b/src/mystring.c
index 7d937a8..df1691b 100644
--- a/src/mystring.c
+++ b/src/mystring.c
@@ -42,6 +42,11 @@
  *	is_number(s)		Return true if s is a string of digits.
  */
 
+#include <ctype.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <stdint.h>
 #include <stdlib.h>
 #include "shell.h"
 #include "syntax.h"
@@ -105,6 +110,29 @@ prefix(const char *string, const char *pfx)
 
 
 /*
+ * Convert a string into an integer of type intmax_t.  Alow trailing spaces.
+ */
+intmax_t atomax10(const char *s)
+{
+	char *p;
+	intmax_t r;
+
+	errno = 0;
+	r = strtoimax(s, &p, 10);
+
+	if (errno != 0)
+		sh_error(illnum, s);
+
+	while (isspace((unsigned char)*p))
+	      p++;
+
+	if (*p)
+		sh_error(illnum, s);
+
+	return r;
+}
+
+/*
  * Convert a string of digits to an integer, printing an error message on
  * failure.
  */
@@ -112,10 +140,12 @@ prefix(const char *string, const char *pfx)
 int
 number(const char *s)
 {
+	intmax_t n = atomax10(s);
 
-	if (! is_number(s))
+	if (n < 0 || n > INT_MAX)
 		sh_error(illnum, s);
-	return atoi(s);
+
+	return n;
 }
 
 
diff --git a/src/mystring.h b/src/mystring.h
index f451cc2..c9cade6 100644
--- a/src/mystring.h
+++ b/src/mystring.h
@@ -34,6 +34,7 @@
  *	@(#)mystring.h	8.2 (Berkeley) 5/4/95
  */
 
+#include <stdint.h>
 #include <string.h>
 
 extern const char snlfmt[];
@@ -47,6 +48,7 @@ extern const char homestr[];
 void scopyn(const char *, char *, int);
 #endif
 char *prefix(const char *, const char *);
+intmax_t atomax10(const char *);
 int number(const char *);
 int is_number(const char *);
 char *single_quote(const char *);