+/*
+ * Copyright (c) 2008 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+/* CFStringScanner.c
+ Copyright 1999-2002, Apple, Inc. All rights reserved.
+ Responsibility: Ali Ozer
+*/
+
+#include "CFInternal.h"
+#include <CoreFoundation/CFString.h>
+#include <sys/types.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+
+CF_INLINE Boolean __CFCharacterIsADigit(UniChar ch) {
+ return (ch >= '0' && ch <= '9') ? true : false;
+}
+
+/* Returns -1 on illegal value */
+CF_INLINE SInt32 __CFCharacterNumericOrHexValue (UniChar ch) {
+ if (ch >= '0' && ch <= '9') {
+ return ch - '0';
+ } else if (ch >= 'A' && ch <= 'F') {
+ return ch + 10 - 'A';
+ } else if (ch >= 'a' && ch <= 'f') {
+ return ch + 10 - 'a';
+ } else {
+ return -1;
+ }
+}
+
+/* Returns -1 on illegal value */
+CF_INLINE SInt32 __CFCharacterNumericValue(UniChar ch) {
+ return (ch >= '0' && ch <= '9') ? (ch - '0') : -1;
+}
+
+CF_INLINE UniChar __CFStringGetFirstNonSpaceCharacterFromInlineBuffer(CFStringInlineBuffer *buf, SInt32 *indexPtr) {
+ UniChar ch;
+ while (__CFIsWhitespace(ch = __CFStringGetCharacterFromInlineBufferAux(buf, *indexPtr))) (*indexPtr)++;
+ return ch;
+}
+
+/* result is int64_t or int, depending on doLonglong
+*/
+__private_extern__ Boolean __CFStringScanInteger(CFStringInlineBuffer *buf, CFTypeRef locale, SInt32 *indexPtr, Boolean doLonglong, void *result) {
+ Boolean doingLonglong = false; /* Set to true if doLonglong, and we overflow an int... */
+ Boolean neg = false;
+ int intResult = 0;
+ register int64_t longlongResult = 0; /* ??? int64_t is slow when not in regs; I hope this does the right thing. */
+ UniChar ch;
+
+ ch = __CFStringGetFirstNonSpaceCharacterFromInlineBuffer(buf, indexPtr);
+
+ if (ch == '-' || ch == '+') {
+ neg = (ch == '-');
+ (*indexPtr)++;
+ ch = __CFStringGetFirstNonSpaceCharacterFromInlineBuffer(buf, indexPtr);
+ }
+
+ if (! __CFCharacterIsADigit(ch)) return false; /* No digits, bail out... */
+ do {
+ if (doingLonglong) {
+ if ((longlongResult >= LLONG_MAX / 10) && ((longlongResult > LLONG_MAX / 10) || (__CFCharacterNumericValue(ch) - (neg ? 1 : 0) >= LLONG_MAX - longlongResult * 10))) {
+ /* ??? This might not handle LLONG_MIN correctly... */
+ longlongResult = neg ? LLONG_MIN : LLONG_MAX;
+ neg = false;
+ while (__CFCharacterIsADigit(ch = __CFStringGetCharacterFromInlineBufferAux(buf, ++(*indexPtr)))); /* Skip remaining digits */
+ } else {
+ longlongResult = longlongResult * 10 + __CFCharacterNumericValue(ch);
+ ch = __CFStringGetCharacterFromInlineBufferAux(buf, ++(*indexPtr));
+ }
+ } else {
+ if ((intResult >= INT_MAX / 10) && ((intResult > INT_MAX / 10) || (__CFCharacterNumericValue(ch) - (neg ? 1 : 0) >= INT_MAX - intResult * 10))) {
+ // Overflow, check for int64_t...
+ if (doLonglong) {
+ longlongResult = intResult;
+ doingLonglong = true;
+ } else {
+ /* ??? This might not handle INT_MIN correctly... */
+ intResult = neg ? INT_MIN : INT_MAX;
+ neg = false;
+ while (__CFCharacterIsADigit(ch = __CFStringGetCharacterFromInlineBufferAux(buf, ++(*indexPtr)))); /* Skip remaining digits */
+ }
+ } else {
+ intResult = intResult * 10 + __CFCharacterNumericValue(ch);
+ ch = __CFStringGetCharacterFromInlineBufferAux(buf, ++(*indexPtr));
+ }
+ }
+ } while (__CFCharacterIsADigit(ch));
+
+ if (result) {
+ if (doLonglong) {
+ if (!doingLonglong) longlongResult = intResult;
+ *(int64_t *)result = neg ? -longlongResult : longlongResult;
+ } else {
+ *(int *)result = neg ? -intResult : intResult;
+ }
+ }
+
+ return true;
+}
+
+__private_extern__ Boolean __CFStringScanHex(CFStringInlineBuffer *buf, SInt32 *indexPtr, unsigned *result) {
+ UInt32 value = 0;
+ SInt32 curDigit;
+ UniChar ch;
+
+ ch = __CFStringGetFirstNonSpaceCharacterFromInlineBuffer(buf, indexPtr);
+ /* Ignore the optional "0x" or "0X"; if it's followed by a non-hex, just parse the "0" and leave pointer at "x" */
+ if (ch == '0') {
+ ch = __CFStringGetCharacterFromInlineBufferAux(buf, ++(*indexPtr));
+ if (ch == 'x' || ch == 'X') ch = __CFStringGetCharacterFromInlineBufferAux(buf, ++(*indexPtr));
+ curDigit = __CFCharacterNumericOrHexValue(ch);
+ if (curDigit == -1) {
+ (*indexPtr)--; /* Go back over the "x" or "X" */
+ if (result) *result = 0;
+ return true; /* We just saw "0" */
+ }
+ } else {
+ curDigit = __CFCharacterNumericOrHexValue(ch);
+ if (curDigit == -1) return false;
+ }
+
+ do {
+ if (value > (UINT_MAX >> 4)) {
+ value = UINT_MAX; /* We do this over and over again, but it's an error case anyway */
+ } else {
+ value = (value << 4) + curDigit;
+ }
+ curDigit = __CFCharacterNumericOrHexValue(__CFStringGetCharacterFromInlineBufferAux(buf, ++(*indexPtr)));
+ } while (curDigit != -1);
+
+ if (result) *result = value;
+ return true;
+}
+
+// Packed array of Boolean
+static const unsigned char __CFNumberSet[16] = {
+ 0X00, // 0, 0, 0, 0, 0, 0, 0, 0, // nul soh stx etx eot enq ack bel
+ 0X00, // 0, 0, 0, 0, 0, 0, 0, 0, // bs ht nl vt np cr so si
+ 0X00, // 0, 0, 0, 0, 0, 0, 0, 0, // dle dc1 dc2 dc3 dc4 nak syn etb
+ 0X00, // 0, 0, 0, 0, 0, 0, 0, 0, // can em sub esc fs gs rs us
+ 0X00, // 0, 0, 0, 0, 0, 0, 0, 0, // sp ! " # $ % & '
+ 0X28, // 0, 0, 0, 1, 0, 1, 0, 0, // ( ) * + , - . /
+ 0xFF, // 1, 1, 1, 1, 1, 1, 1, 1, // 0 1 2 3 4 5 6 7
+ 0X03, // 1, 1, 0, 0, 0, 0, 0, 0, // 8 9 : ; < = > ?
+ 0X20, // 0, 0, 0, 0, 0, 1, 0, 0, // @ A B C D E F G
+ 0X00, // 0, 0, 0, 0, 0, 0, 0, 0, // H I J K L M N O
+ 0X00, // 0, 0, 0, 0, 0, 0, 0, 0, // P Q R S T U V W
+ 0X00, // 0, 0, 0, 0, 0, 0, 0, 0, // X Y Z [ \ ] ^ _
+ 0X20, // 0, 0, 0, 0, 0, 1, 0, 0, // ` a b c d e f g
+ 0X00, // 0, 0, 0, 0, 0, 0, 0, 0, // h i j k l m n o
+ 0X00, // 0, 0, 0, 0, 0, 0, 0, 0, // p q r s t u v w
+ 0X00, // 0, 0, 0, 0, 0, 0, 0, 0 // x y z { | } ~ del
+};
+
+__private_extern__ Boolean __CFStringScanDouble(CFStringInlineBuffer *buf, CFTypeRef locale, SInt32 *indexPtr, double *resultPtr) {
+ #define STACK_BUFFER_SIZE 256
+ #define ALLOC_CHUNK_SIZE 256 // first and subsequent malloc size. Should be greater than STACK_BUFFER_SIZE
+ char localCharBuffer[STACK_BUFFER_SIZE];
+ char *charPtr = localCharBuffer;
+ char *endCharPtr;
+ UniChar decimalChar = '.';
+ SInt32 numChars = 0;
+ SInt32 capacity = STACK_BUFFER_SIZE; // in chars
+ double result;
+ UniChar ch;
+ CFAllocatorRef tmpAlloc = NULL;
+
+#if 0
+ if (locale != NULL) {
+ CFStringRef decimalSeparator = [locale objectForKey: @"NSDecimalSeparator"];
+ if (decimalSeparator != nil) decimalChar = [decimalSeparator characterAtIndex:0];
+ }
+#endif
+ ch = __CFStringGetFirstNonSpaceCharacterFromInlineBuffer(buf, indexPtr);
+ // At this point indexPtr points at the first non-space char
+#if 0
+#warning need to allow, case insensitively, all of: "nan", "inf", "-inf", "+inf", "-infinity", "+infinity", "infinity";
+#warning -- strtod() will actually do most or all of that for us
+#define BITSFORDOUBLENAN ((uint64_t)0x7ff8000000000000ULL)
+#define BITSFORDOUBLEPOSINF ((uint64_t)0x7ff0000000000000ULL)
+#define BITSFORDOUBLENEGINF ((uint64_t)0xfff0000000000000ULL)
+ if ('N' == ch || 'n' == ch) { // check for "NaN", case insensitively
+ UniChar next1 = __CFStringGetCharacterFromInlineBufferAux(buf, *indexPtr + 1);
+ UniChar next2 = __CFStringGetCharacterFromInlineBufferAux(buf, *indexPtr + 2);
+ if (('a' == next1 || 'A' == next1) &&
+ ('N' == next2 || 'n' == next2)) {
+ *indexPtr += 3;
+ if (resultPtr) *(uint64_t *)resultPtr = BITSFORDOUBLENAN;
+ return true;
+ }
+ }
+ if ('I' == ch || 'i' == ch) { // check for "Inf", case insensitively
+ UniChar next1 = __CFStringGetCharacterFromInlineBufferAux(buf, *indexPtr + 1);
+ UniChar next2 = __CFStringGetCharacterFromInlineBufferAux(buf, *indexPtr + 2);
+ if (('n' == next1 || 'N' == next1) &&
+ ('f' == next2 || 'F' == next2)) {
+ *indexPtr += 3;
+ if (resultPtr) *(uint64_t *)resultPtr = BITSFORDOUBLEPOSINF;
+ return true;
+ }
+ }
+ if ('+' == ch || '-' == ch) { // check for "+/-Inf", case insensitively
+ UniChar next1 = __CFStringGetCharacterFromInlineBufferAux(buf, *indexPtr + 1);
+ UniChar next2 = __CFStringGetCharacterFromInlineBufferAux(buf, *indexPtr + 2);
+ UniChar next3 = __CFStringGetCharacterFromInlineBufferAux(buf, *indexPtr + 3);
+ if (('I' == next1 || 'i' == next1) &&
+ ('n' == next2 || 'N' == next2) &&
+ ('f' == next3 || 'F' == next3)) {
+ *indexPtr += 4;
+ if (resultPtr) *(uint64_t *)resultPtr = ('-' == ch) ? BITSFORDOUBLENEGINF : BITSFORDOUBLEPOSINF;
+ return true;
+ }
+ }
+#endif 0
+ do {
+ if (ch >= 128 || (__CFNumberSet[ch >> 3] & (1 << (ch & 7))) == 0) {
+ // Not in __CFNumberSet
+ if (ch != decimalChar) break;
+ ch = '.'; // Replace the decimal character with something strtod will understand
+ }
+ if (numChars >= capacity - 1) {
+ capacity += ALLOC_CHUNK_SIZE;
+ if (tmpAlloc == NULL) tmpAlloc = __CFGetDefaultAllocator();
+ if (charPtr == localCharBuffer) {
+ charPtr = (char *)CFAllocatorAllocate(tmpAlloc, capacity * sizeof(char), 0);
+ memmove(charPtr, localCharBuffer, numChars * sizeof(char));
+ } else {
+ charPtr = (char *)CFAllocatorReallocate(tmpAlloc, charPtr, capacity * sizeof(char), 0);
+ }
+ }
+ charPtr[numChars++] = (char)ch;
+ ch = __CFStringGetCharacterFromInlineBufferAux(buf, *indexPtr + numChars);
+ } while (true);
+ charPtr[numChars] = 0; // Null byte for strtod
+
+ result = strtod_l(charPtr, &endCharPtr, NULL);
+
+ if (tmpAlloc) CFAllocatorDeallocate(tmpAlloc, charPtr);
+ if (charPtr == endCharPtr) return false;
+ *indexPtr += (endCharPtr - charPtr);
+ if (resultPtr) *resultPtr = result; // only store result if we succeed
+
+ return true;
+}
+
+
+#undef STACK_BUFFER_SIZE
+#undef ALLOC_CHUNK_SIZE
+
+
projects / apple / cf.git / blobdiff