1 files changed, 131 insertions, 0 deletions
diff --git a/src/libs/libgroff/strtol.c b/src/libs/libgroff/strtol.c
new file mode 100644
index 0000000..1820732
--- /dev/null
+++ b/src/libs/libgroff/strtol.c
@@ -0,0 +1,131 @@
+/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+
+#ifdef HAVE_LIMITS_H
+#include <limits.h>
+#endif
+
+#ifndef LONG_MAX
+#define LONG_MAX  2147483647
+#endif
+
+#ifndef LONG_MIN
+#define LONG_MIN (-LONG_MAX-1)
+#endif
+
+#ifdef isascii
+#define ISASCII(c) isascii(c)
+#else
+#define ISASCII(c) (1)
+#endif
+
+long strtol(str, ptr, base)
+     char *str, **ptr;
+     int base;
+{
+  char *start = str;
+  int neg = 0;
+  long val;
+  char *p;
+  static char digits[] = "0123456789abcdefghijklmnopqrstuvwxyz";
+
+  while (ISASCII((unsigned char)*str) && isspace((unsigned char)*str))
+    str++;
+
+  if (*str == '-') {
+    neg = 1;
+    str++;
+  }
+  if (base == 0) {
+    if (*str == '0') {
+      if (str[1] == 'x' || str[1] == 'X') {
+	str += 2;
+	base = 16;
+      }
+      else
+	base = 8;
+    }
+    else
+      base = 10;
+  }
+  if (base < 2 || base > 36)
+    base = 10;
+  else if (base == 16 && *str == '0' && (str[1] == 'x' || str[1] == 'X'))
+    str += 2;
+
+  p = strchr(digits, (ISASCII((unsigned char)*str)
+		      && isupper((unsigned char)*str)
+		      ? tolower((unsigned char)*str)
+		      : *str));
+  if (p == 0 || (val = (p - digits)) >= base) {
+    if (base == 16 && str > start && (str[-1] == 'x' || str[-1] == 'X')) {
+      if (ptr)
+	*ptr = str - 1;
+    }
+    else {
+      if (ptr)
+	*ptr = start;
+      errno = ERANGE;
+    }
+    return 0;
+  }
+  if (neg)
+    val = -val;
+    
+  while (*++str != '\0') {
+    int n;
+
+    p = strchr(digits, (ISASCII((unsigned char)*str)
+			&& isupper((unsigned char)*str)
+			? tolower((unsigned char)*str) : *str));
+    if (p == 0)
+      break;
+    n = p - digits;
+    if (n >= base)
+      break;
+    if (neg) {
+      if (-(unsigned long)val > (-(unsigned long)LONG_MIN - n)/base) {
+	val = LONG_MIN;
+	errno = ERANGE;
+      }
+      else
+	val = val*base - n;
+    }
+    else {
+      if (val > (LONG_MAX - n)/base) {
+	val = LONG_MAX;
+	errno = ERANGE;
+      }
+      else
+	val = val*base + n;
+    }
+  }
+  
+  if (ptr)
+    *ptr = str;
+
+  return val;
+}