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authorDaniel Stenberg <daniel@haxx.se>2004-01-05 22:39:46 +0000
committerDaniel Stenberg <daniel@haxx.se>2004-01-05 22:39:46 +0000
commit9363d94f9b07eb4ffb9addfe80114dfd4247c1d9 (patch)
tree669981b5519f31482523181a0722f399c91c25f1
parentea1c98dccf27aa6f63c0777514b617f66cc35d62 (diff)
new files for the large file support number parsing
-rw-r--r--lib/strtoofft.c153
-rw-r--r--lib/strtoofft.h50
2 files changed, 203 insertions, 0 deletions
diff --git a/lib/strtoofft.c b/lib/strtoofft.c
new file mode 100644
index 000000000..a8e6fa160
--- /dev/null
+++ b/lib/strtoofft.c
@@ -0,0 +1,153 @@
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2003, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ * $Id$
+ ***************************************************************************/
+
+#include "setup.h"
+#include "strtoofft.h"
+
+#ifdef NEED_CURL_STRTOLL
+#include <stdlib.h>
+#include <ctype.h>
+#include <errno.h>
+
+static int get_char(char c, int base);
+
+/**
+ * Emulated version of the strtoll function. This extracts a long long
+ * value from the given input string and returns it.
+ */
+long long
+Curl_strtoll(const char *nptr, char **endptr, int base)
+{
+ char *end;
+ int is_negative = 0;
+ int overflow;
+ int i;
+ long long value = 0;
+ long long newval;
+
+ /* Skip leading whitespace. */
+ end = (char *)nptr;
+ while (isspace((int)end[0])) {
+ end++;
+ }
+
+ /* Handle the sign, if any. */
+ if (end[0] == '-') {
+ is_negative = 1;
+ end++;
+ } else if (end[0] == '+') {
+ end++;
+ } else if (end[0] == '\0') {
+ /* We had nothing but perhaps some whitespace -- there was no number. */
+ if (endptr) {
+ *endptr = end;
+ }
+ return 0;
+ }
+
+ /* Handle special beginnings, if present and allowed. */
+ if (end[0] == '0' && end[1] == 'x') {
+ if (base == 16 || base == 0) {
+ end += 2;
+ base = 16;
+ }
+ } else if (end[0] == '0') {
+ if (base == 8 || base == 0) {
+ end++;
+ base = 8;
+ }
+ }
+
+ /* Matching strtol, if the base is 0 and it doesn't look like
+ * the number is octal or hex, we assume it's base 10.
+ */
+ if (base == 0) {
+ base = 10;
+ }
+
+ /* Loop handling digits. */
+ value = 0;
+ overflow = 0;
+ for (i = get_char(end[0], base);
+ i != -1;
+ end++, i = get_char(end[0], base))
+ {
+ newval = base * value + i;
+ if (newval < value) {
+ /* We've overflowed. */
+ overflow = 1;
+ break;
+ } else {
+ value = newval;
+ }
+ }
+
+ if (!overflow) {
+ if (is_negative) {
+ /* Fix the sign. */
+ value *= -1;
+ }
+ } else {
+ if (is_negative) {
+ value = 0x8000000000000000L;
+ } else {
+ value = 0x7FFFFFFFFFFFFFFFL;
+ }
+
+ errno = ERANGE;
+ }
+
+ if (endptr) {
+ *endptr = end;
+ }
+
+ return value;
+}
+
+/**
+ * Returns the value of c in the given base, or -1 if c cannot
+ * be interpreted properly in that base (i.e., is out of range,
+ * is a null, etc.).
+ *
+ * @param c the character to interpret according to base
+ * @param base the base in which to interpret c
+ *
+ * @return the value of c in base, or -1 if c isn't in range
+ */
+static int get_char(char c, int base) {
+ int value = -1;
+ if (c <= '9' && c >= '0') {
+ value = c - '0';
+ } else if (c <= 'Z' && c >= 'A') {
+ value = c - 'A' + 10;
+ } else if (c <= 'z' && c >= 'a') {
+ value = c - 'a' + 10;
+ }
+
+ if (value >= base) {
+ value = -1;
+ }
+
+ return value;
+}
+#endif /* Only present if we need strtoll, but don't have it. */
diff --git a/lib/strtoofft.h b/lib/strtoofft.h
new file mode 100644
index 000000000..f335b11e4
--- /dev/null
+++ b/lib/strtoofft.h
@@ -0,0 +1,50 @@
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2003, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ * $Id$
+ ***************************************************************************/
+
+#ifndef _CURL_STRTOOFFT_R_H
+#define _CURL_STRTOOFFT_R_H
+
+#include "setup.h"
+#include <stddef.h>
+
+/* Determine what type of file offset conversion handling we wish
+ * to use. For systems with a 32-bit off_t type, we should use
+ * strtol. For systems with a 64-bit off_t type, we should use
+ * strtoll if it exists, and if not, should try to emulate its
+ * functionality. At any rate, we define 'strtoofft' such that it
+ * can be used to work with off_t's regardless.
+ */
+#if SIZEOF_OFF_T > 4
+#if HAVE_STRTOLL
+#define strtoofft strtoll
+#else
+long long Curl_strtoll(const char *nptr, char **endptr, int base);
+#define strtoofft Curl_strtoll
+#define NEED_CURL_STRTOLL
+#endif
+#else
+#define strtoofft strtol
+#endif
+
+#endif
+