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- /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
- *
- * The contents of this file are subject to the Netscape Public License
- * Version 1.0 (the "NPL"); you may not use this file except in
- * compliance with the NPL. You may obtain a copy of the NPL at
- * http://www.mozilla.org/NPL/
- *
- * Software distributed under the NPL is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
- * for the specific language governing rights and limitations under the
- * NPL.
- *
- * The Initial Developer of this code under the NPL is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1998 Netscape Communications Corporation. All Rights
- * Reserved.
- */
-
- #ifndef jsstr_h___
- #define jsstr_h___
- /*
- * JS string type implementation.
- *
- * A JS string is a counted array of unicode characters. To support handoff
- * of API client memory, the chars are allocated separately from the length,
- * necessitating a pointer after the count, to form a string header. String
- * headers are GC'ed while string bytes are allocated from the malloc heap.
- *
- * When a string is treated as an object (by following it with . or []), the
- * runtime wraps it with a JSObject whose valueOf method returns the unwrapped
- * string header.
- */
- #include <ctype.h>
- #include "jspubtd.h"
- #include "jsprvtd.h"
-
- PR_BEGIN_EXTERN_C
-
- struct JSString {
- size_t length;
- jschar *chars;
- };
-
- struct JSSubString {
- size_t length;
- const jschar *chars;
- };
-
- extern jschar js_empty_ucstr[];
- extern JSSubString js_EmptySubString;
-
- /* Unicode character attribute lookup tables. */
- extern const uint8 js_X[];
- extern const uint8 js_Y[];
- extern const int32 js_A[];
-
- /* Enumerated Unicode general category types. */
- typedef enum JSCharType {
- JSCT_UNASSIGNED = 0,
- JSCT_UPPERCASE_LETTER = 1,
- JSCT_LOWERCASE_LETTER = 2,
- JSCT_TITLECASE_LETTER = 3,
- JSCT_MODIFIER_LETTER = 4,
- JSCT_OTHER_LETTER = 5,
- JSCT_NON_SPACING_MARK = 6,
- JSCT_ENCLOSING_MARK = 7,
- JSCT_COMBINING_SPACING_MARK = 8,
- JSCT_DECIMAL_DIGIT_NUMBER = 9,
- JSCT_LETTER_NUMBER = 10,
- JSCT_OTHER_NUMBER = 11,
- JSCT_SPACE_SEPARATOR = 12,
- JSCT_LINE_SEPARATOR = 13,
- JSCT_PARAGRAPH_SEPARATOR = 14,
- JSCT_CONTROL = 15,
- JSCT_FORMAT = 16,
- JSCT_PRIVATE_USE = 18,
- JSCT_SURROGATE = 19,
- JSCT_DASH_PUNCTUATION = 20,
- JSCT_START_PUNCTUATION = 21,
- JSCT_END_PUNCTUATION = 22,
- JSCT_CONNECTOR_PUNCTUATION = 23,
- JSCT_OTHER_PUNCTUATION = 24,
- JSCT_MATH_SYMBOL = 25,
- JSCT_CURRENCY_SYMBOL = 26,
- JSCT_MODIFIER_SYMBOL = 27,
- JSCT_OTHER_SYMBOL = 28
- } JSCharType;
-
- /* Character classifying and mapping macros, based on java.lang.Character. */
- #define JS_CCODE(c) (js_A[js_Y[(js_X[(c)>>6]<<6)|((c)&0x3F)]])
- #define JS_CTYPE(c) (JS_CCODE(c) & 0x1F)
-
- #define JS_ISALPHA(c) ((((1 << JSCT_UPPERCASE_LETTER) | \
- (1 << JSCT_LOWERCASE_LETTER) | \
- (1 << JSCT_TITLECASE_LETTER) | \
- (1 << JSCT_MODIFIER_LETTER) | \
- (1 << JSCT_OTHER_LETTER)) \
- >> JS_CTYPE(c)) & 1)
-
- #define JS_ISALNUM(c) ((((1 << JSCT_UPPERCASE_LETTER) | \
- (1 << JSCT_LOWERCASE_LETTER) | \
- (1 << JSCT_TITLECASE_LETTER) | \
- (1 << JSCT_MODIFIER_LETTER) | \
- (1 << JSCT_OTHER_LETTER) | \
- (1 << JSCT_DECIMAL_DIGIT_NUMBER)) \
- >> JS_CTYPE(c)) & 1)
-
- #define JS_ISWORD(c) (JS_ISALNUM(c) || (c) == '_')
-
- /* XXXbe unify on A/X/Y tbls, avoid ctype.h? */
- #define JS_ISIDENT(c) ((c) < 128 && (isalpha(c) || (c) == '_' || (c) == '$'))
- #define JS_ISIDENT2(c) ((c) < 128 && (isalnum(c) || (c) == '_' || (c) == '$'))
-
- #define JS_ISDIGIT(c) (JS_CTYPE(c) == JSCT_DECIMAL_DIGIT_NUMBER)
-
- /* XXXbe fs, etc. ? */
- #define JS_ISSPACE(c) ((JS_CCODE(c) & 0x00070000) == 0x00040000)
- #define JS_ISPRINT(c) ((c) < 128 && isprint(c))
-
- #define JS_ISUPPER(c) (JS_CTYPE(c) == JSCT_UPPERCASE_LETTER)
- #define JS_ISLOWER(c) (JS_CTYPE(c) == JSCT_LOWERCASE_LETTER)
-
- #ifdef __GNUC__
-
- #define JS_TOUPPER(c) ({int32 _v = JS_CCODE(c); \
- (_v & 0x00100000) ? (c) - (_v >> 22) : (c);})
- #define JS_TOLOWER(c) ({int32 _v = JS_CCODE(c); \
- (_v & 0x00200000) ? (c) + (_v >> 22) : (c);})
-
- #else /* !__GNUC__ */
-
- #define JS_TOUPPER(c) js_ToUpper((jschar)c)
- #define JS_TOLOWER(c) js_ToLower((jschar)c)
-
- extern jschar js_ToUpper(jschar c);
- extern jschar js_ToLower(jschar c);
-
- #endif /* !__GNUC__ */
-
- #define JS_TOCTRL(c) ((c) ^ 64) /* XXX unsafe! requires uppercase c */
-
- /* Shorthands for ASCII (7-bit) decimal and hex conversion. */
- #define JS7_ISDEC(c) ((c) < 128 && isdigit(c))
- #define JS7_UNDEC(c) ((c) - '0')
- #define JS7_ISHEX(c) ((c) < 128 && isxdigit(c))
- #define JS7_UNHEX(c) (uintN)(isdigit(c) ? (c) - '0' : 10 + tolower(c) - 'a')
- #define JS7_ISLET(c) ((c) < 128 && isalpha(c))
-
- /* Initialize the String class, returning its prototype object. */
- extern JSObject *
- js_InitStringClass(JSContext *cx, JSObject *obj);
-
- /* GC-allocate a string descriptor for the given malloc-allocated chars. */
- extern JSString *
- js_NewString(JSContext *cx, jschar *chars, size_t length, uintN gcflag);
-
- /* Copy a counted string and GC-allocate a descriptor for it. */
- extern JSString *
- js_NewStringCopyN(JSContext *cx, const jschar *s, size_t n, uintN gcflag);
-
- /* Copy a C string and GC-allocate a descriptor for it. */
- extern JSString *
- js_NewStringCopyZ(JSContext *cx, const jschar *s, uintN gcflag);
-
- /* Free the chars held by str when it is finalized by the GC. */
- extern void
- js_FinalizeString(JSContext *cx, JSString *str);
-
- /* Wrap a string value in a String object. */
- extern JSObject *
- js_StringToObject(JSContext *cx, JSString *str);
-
- /*
- * Convert a value to a string, returning null after reporting an error,
- * otherwise returning a new string reference.
- */
- extern JSString *
- js_ValueToString(JSContext *cx, jsval v);
-
- #ifdef HT_ENUMERATE_NEXT /* XXX don't require prhash.h */
- /*
- * Compute a hash function from str.
- */
- extern PRHashNumber
- js_HashString(const JSString *str);
- #endif
-
- /*
- * Return less than, equal to, or greater than zero depending on whether
- * str1 is less than, equal to, or greater than str2.
- */
- extern intN
- js_CompareStrings(const JSString *str1, const JSString *str2);
-
- /*
- * Boyer-Moore-Horspool superlinear search for pat:patlen in text:textlen.
- * The patlen argument must be positive and no greater than BMH_PATLEN_MAX.
- * The start argument tells where in text to begin the search.
- *
- * Return the index of pat in text, or -1 if not found.
- */
- #define BMH_CHARSET_SIZE 256 /* ISO-Latin-1 */
- #define BMH_PATLEN_MAX 255 /* skip table element is uint8 */
-
- #define BMH_BAD_PATTERN (-2) /* return value if pat is not ISO-Latin-1 */
-
- extern jsint
- js_BoyerMooreHorspool(const jschar *text, jsint textlen,
- const jschar *pat, jsint patlen,
- jsint start);
-
- extern size_t
- js_strlen(const jschar *s);
-
- extern jschar *
- js_strchr(const jschar *s, jschar c);
-
- extern jschar *
- js_strncpy(jschar *t, const jschar *s, size_t n);
-
- /*
- * Inflate bytes to JS chars and vice versa. Report out of memory via cx
- * and return null on error, otherwise return the jschar or byte vector that
- * was JS_malloc'ed.
- */
- extern jschar *
- js_InflateString(JSContext *cx, const char *bytes, size_t length);
-
- extern char *
- js_DeflateString(JSContext *cx, const jschar *chars, size_t length);
-
- /*
- * Associate bytes with str in the deflated string cache, returning true on
- * successful association, false on out of memory.
- */
- extern JSBool
- js_SetStringBytes(JSString *str, char *bytes, size_t length);
-
- /*
- * Find or create a deflated string cache entry for str that contains its
- * characters chopped from Unicode code points into bytes.
- */
- extern char *
- js_GetStringBytes(JSString *str);
-
- PR_END_EXTERN_C
-
- #endif /* jsstr_h___ */
-