jsstr.h

java script test programing source code

/* Unicode control-format characters, ignored in input */
#define JS_ISFORMAT(c) (((1 << JSCT_FORMAT) >> JS_CTYPE(c)) & 1)

/*
 * Per ECMA-262 15.10.2.6, these characters are the only ones that make up a
 * "word", as far as a RegExp is concerned.  If we want a Unicode-friendlier
 * definition of "word", we should rename this macro to something regexp-y.
 */
#define JS_ISWORD(c)    ((c) < 128 && (isalnum(c) || (c) == '_'))

#define JS_ISIDSTART(c) (JS_ISLETTER(c) || (c) == '_' || (c) == '$')
#define JS_ISIDENT(c)   (JS_ISIDPART(c) || (c) == '_' || (c) == '$')

#define JS_ISXMLSPACE(c)        ((c) == ' ' || (c) == '\t' || (c) == '\r' ||  \
                                 (c) == '\n')
#define JS_ISXMLNSSTART(c)      ((JS_CCODE(c) & 0x00000100) || (c) == '_')
#define JS_ISXMLNS(c)           ((JS_CCODE(c) & 0x00000080) || (c) == '.' ||  \
                                 (c) == '-' || (c) == '_')
#define JS_ISXMLNAMESTART(c)    (JS_ISXMLNSSTART(c) || (c) == ':')
#define JS_ISXMLNAME(c)         (JS_ISXMLNS(c) || (c) == ':')

#define JS_ISDIGIT(c)   (JS_CTYPE(c) == JSCT_DECIMAL_DIGIT_NUMBER)

/* XXXbe unify on A/X/Y tbls, avoid ctype.h? */
/* 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)

#define JS_TOUPPER(c)   ((jschar) ((JS_CCODE(c) & 0x00100000)                 \
                                   ? (c) - ((int32)JS_CCODE(c) >> 22)         \
                                   : (c)))
#define JS_TOLOWER(c)   ((jschar) ((JS_CCODE(c) & 0x00200000)                 \
                                   ? (c) + ((int32)JS_CCODE(c) >> 22)         \
                                   : (c)))

/*
 * Shorthands for ASCII (7-bit) decimal and hex conversion.
 * Manually inline isdigit for performance; MSVC doesn't do this for us.
 */
#define JS7_ISDEC(c)    ((((unsigned)(c)) - '0') <= 9)
#define JS7_UNDEC(c)    ((c) - '0')
#define JS7_ISHEX(c)    ((c) < 128 && isxdigit(c))
#define JS7_UNHEX(c)    (uintN)(JS7_ISDEC(c) ? (c) - '0' : 10 + tolower(c) - 'a')
#define JS7_ISLET(c)    ((c) < 128 && isalpha(c))

/* Initialize per-runtime string state for the first context in the runtime. */
extern JSBool
js_InitRuntimeStringState(JSContext *cx);

extern void
js_FinishRuntimeStringState(JSContext *cx);

extern void
js_FinishDeflatedStringCache(JSRuntime *rt);

/* Initialize the String class, returning its prototype object. */
extern JSClass js_StringClass;

extern JSObject *
js_InitStringClass(JSContext *cx, JSObject *obj);

extern const char js_escape_str[];
extern const char js_unescape_str[];
extern const char js_uneval_str[];
extern const char js_decodeURI_str[];
extern const char js_encodeURI_str[];
extern const char js_decodeURIComponent_str[];
extern const char js_encodeURIComponent_str[];

/* GC-allocate a string descriptor for the given malloc-allocated chars. */
extern JSString *
js_NewString(JSContext *cx, jschar *chars, size_t length, uintN gcflag);

extern JSString *
js_NewDependentString(JSContext *cx, JSString *base, size_t start,
                      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);

extern void
js_FinalizeStringRT(JSRuntime *rt, JSString *str);

/* Wrap a string value in a String object. */
extern JSObject *
js_StringToObject(JSContext *cx, JSString *str);

/*
 * Convert a value to a printable C string.
 */
typedef JSString *(*JSValueToStringFun)(JSContext *cx, jsval v);

extern JS_FRIEND_API(const char *)
js_ValueToPrintable(JSContext *cx, jsval v, JSValueToStringFun v2sfun);

#define js_ValueToPrintableString(cx,v) \
    js_ValueToPrintable(cx, v, js_ValueToString)

#define js_ValueToPrintableSource(cx,v) \
    js_ValueToPrintable(cx, v, js_ValueToSource)

/*
 * Convert a value to a string, returning null after reporting an error,
 * otherwise returning a new string reference.
 */
extern JS_FRIEND_API(JSString *)
js_ValueToString(JSContext *cx, jsval v);

/*
 * Convert a value to its source expression, returning null after reporting
 * an error, otherwise returning a new string reference.
 */
extern JS_FRIEND_API(JSString *)
js_ValueToSource(JSContext *cx, jsval v);

#ifdef HT_ENUMERATE_NEXT        /* XXX don't require jshash.h */
/*
 * Compute a hash function from str.
 */
extern JSHashNumber
js_HashString(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(JSString *str1, JSString *str2);

/*
 * Test if strings are equal.
 */
extern JSBool
js_EqualStrings(JSString *str1, 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_strchr_limit(const jschar *s, jschar c, const jschar *limit);

#define js_strncpy(t, s, n)     memcpy((t), (s), (n) * sizeof(jschar))

/*
 * Return s advanced past any Unicode white space characters.
 */
extern const jschar *
js_SkipWhiteSpace(const jschar *s);

/*
 * 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. length is updated with the length of the new string in jschars.
 */
extern jschar *
js_InflateString(JSContext *cx, const char *bytes, size_t *length);

extern char *
js_DeflateString(JSContext *cx, const jschar *chars, size_t length);

/*
 * Inflate bytes to JS chars into a buffer.
 * 'chars' must be large enough for 'length' jschars.
 * The buffer is NOT null-terminated.
 * cx may be NULL, which means no errors are thrown.
 * The destination length needs to be initialized with the buffer size, takes
 * the number of chars moved.
 */
extern JSBool
js_InflateStringToBuffer(JSContext* cx, const char *bytes, size_t length,
                         jschar *chars, size_t* charsLength);

/*
 * Deflate JS chars to bytes into a buffer.
 * 'bytes' must be large enough for 'length chars.
 * The buffer is NOT null-terminated.
 * cx may be NULL, which means no errors are thrown.
 * The destination length needs to be initialized with the buffer size, takes
 * the number of bytes moved.
 */
extern JSBool
js_DeflateStringToBuffer(JSContext* cx, const jschar *chars,
                         size_t charsLength, char *bytes, 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(JSRuntime *rt, 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(JSRuntime *rt, JSString *str);

/* Remove a deflated string cache entry associated with str if any. */
extern void
js_PurgeDeflatedStringCache(JSRuntime *rt, JSString *str);

JSBool
js_str_escape(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
              jsval *rval);

/*
 * Convert one UCS-4 char and write it into a UTF-8 buffer, which must be at
 * least 6 bytes long.  Return the number of UTF-8 bytes of data written.
 */
extern int
js_OneUcs4ToUtf8Char(uint8 *utf8Buffer, uint32 ucs4Char);

JS_END_EXTERN_C

#endif /* jsstr_h___ */