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cosmopolitan/third_party/duktape/duk_util_misc.c

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/*
* Misc util stuff.
*/
#include "third_party/duktape/duk_internal.h"
/*
* Lowercase digits for radix values 2 to 36. Also doubles as lowercase
* hex nybble table.
*/
DUK_INTERNAL const duk_uint8_t duk_lc_digits[36] = {
DUK_ASC_0, DUK_ASC_1, DUK_ASC_2, DUK_ASC_3, DUK_ASC_4,
DUK_ASC_5, DUK_ASC_6, DUK_ASC_7, DUK_ASC_8, DUK_ASC_9,
DUK_ASC_LC_A, DUK_ASC_LC_B, DUK_ASC_LC_C, DUK_ASC_LC_D, DUK_ASC_LC_E,
DUK_ASC_LC_F, DUK_ASC_LC_G, DUK_ASC_LC_H, DUK_ASC_LC_I, DUK_ASC_LC_J,
DUK_ASC_LC_K, DUK_ASC_LC_L, DUK_ASC_LC_M, DUK_ASC_LC_N, DUK_ASC_LC_O,
DUK_ASC_LC_P, DUK_ASC_LC_Q, DUK_ASC_LC_R, DUK_ASC_LC_S, DUK_ASC_LC_T,
DUK_ASC_LC_U, DUK_ASC_LC_V, DUK_ASC_LC_W, DUK_ASC_LC_X, DUK_ASC_LC_Y,
DUK_ASC_LC_Z};
DUK_INTERNAL const duk_uint8_t duk_uc_nybbles[16] = {
DUK_ASC_0, DUK_ASC_1, DUK_ASC_2, DUK_ASC_3,
DUK_ASC_4, DUK_ASC_5, DUK_ASC_6, DUK_ASC_7,
DUK_ASC_8, DUK_ASC_9, DUK_ASC_UC_A, DUK_ASC_UC_B,
DUK_ASC_UC_C, DUK_ASC_UC_D, DUK_ASC_UC_E, DUK_ASC_UC_F};
#if defined(DUK_USE_HEX_FASTPATH)
/* Preshifted << 4. Must use 16-bit entry to allow negative value signaling. */
DUK_INTERNAL const duk_int16_t duk_hex_dectab_shift4[256] = {
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, /* 0x00-0x0f */
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, /* 0x10-0x1f */
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, /* 0x20-0x2f */
0x00, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70,
0x80, 0x90, -1, -1, -1, -1, -1, -1, /* 0x30-0x3f */
-1, 0xa0, 0xb0, 0xc0, 0xd0, 0xe0, 0xf0, -1,
-1, -1, -1, -1, -1, -1, -1, -1, /* 0x40-0x4f */
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, /* 0x50-0x5f */
-1, 0xa0, 0xb0, 0xc0, 0xd0, 0xe0, 0xf0, -1,
-1, -1, -1, -1, -1, -1, -1, -1, /* 0x60-0x6f */
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, /* 0x70-0x7f */
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, /* 0x80-0x8f */
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, /* 0x90-0x9f */
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, /* 0xa0-0xaf */
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, /* 0xb0-0xbf */
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, /* 0xc0-0xcf */
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, /* 0xd0-0xdf */
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, /* 0xe0-0xef */
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1 /* 0xf0-0xff */
};
#endif
/*
* Table for hex encoding bytes
*/
#if defined(DUK_USE_HEX_FASTPATH)
/* Lookup to encode one byte directly into 2 characters:
*
* def genhextab(bswap):
* for i in xrange(256):
* t = chr(i).encode('hex')
* if bswap:
* t = t[1] + t[0]
* print('0x' + t.encode('hex') + 'U')
* print('big endian'); genhextab(False)
* print('little endian'); genhextab(True)
*/
DUK_INTERNAL const duk_uint16_t duk_hex_enctab[256] = {
#if defined(DUK_USE_INTEGER_BE)
0x3030U, 0x3031U, 0x3032U, 0x3033U, 0x3034U, 0x3035U, 0x3036U,
0x3037U, 0x3038U, 0x3039U, 0x3061U, 0x3062U, 0x3063U, 0x3064U,
0x3065U, 0x3066U, 0x3130U, 0x3131U, 0x3132U, 0x3133U, 0x3134U,
0x3135U, 0x3136U, 0x3137U, 0x3138U, 0x3139U, 0x3161U, 0x3162U,
0x3163U, 0x3164U, 0x3165U, 0x3166U, 0x3230U, 0x3231U, 0x3232U,
0x3233U, 0x3234U, 0x3235U, 0x3236U, 0x3237U, 0x3238U, 0x3239U,
0x3261U, 0x3262U, 0x3263U, 0x3264U, 0x3265U, 0x3266U, 0x3330U,
0x3331U, 0x3332U, 0x3333U, 0x3334U, 0x3335U, 0x3336U, 0x3337U,
0x3338U, 0x3339U, 0x3361U, 0x3362U, 0x3363U, 0x3364U, 0x3365U,
0x3366U, 0x3430U, 0x3431U, 0x3432U, 0x3433U, 0x3434U, 0x3435U,
0x3436U, 0x3437U, 0x3438U, 0x3439U, 0x3461U, 0x3462U, 0x3463U,
0x3464U, 0x3465U, 0x3466U, 0x3530U, 0x3531U, 0x3532U, 0x3533U,
0x3534U, 0x3535U, 0x3536U, 0x3537U, 0x3538U, 0x3539U, 0x3561U,
0x3562U, 0x3563U, 0x3564U, 0x3565U, 0x3566U, 0x3630U, 0x3631U,
0x3632U, 0x3633U, 0x3634U, 0x3635U, 0x3636U, 0x3637U, 0x3638U,
0x3639U, 0x3661U, 0x3662U, 0x3663U, 0x3664U, 0x3665U, 0x3666U,
0x3730U, 0x3731U, 0x3732U, 0x3733U, 0x3734U, 0x3735U, 0x3736U,
0x3737U, 0x3738U, 0x3739U, 0x3761U, 0x3762U, 0x3763U, 0x3764U,
0x3765U, 0x3766U, 0x3830U, 0x3831U, 0x3832U, 0x3833U, 0x3834U,
0x3835U, 0x3836U, 0x3837U, 0x3838U, 0x3839U, 0x3861U, 0x3862U,
0x3863U, 0x3864U, 0x3865U, 0x3866U, 0x3930U, 0x3931U, 0x3932U,
0x3933U, 0x3934U, 0x3935U, 0x3936U, 0x3937U, 0x3938U, 0x3939U,
0x3961U, 0x3962U, 0x3963U, 0x3964U, 0x3965U, 0x3966U, 0x6130U,
0x6131U, 0x6132U, 0x6133U, 0x6134U, 0x6135U, 0x6136U, 0x6137U,
0x6138U, 0x6139U, 0x6161U, 0x6162U, 0x6163U, 0x6164U, 0x6165U,
0x6166U, 0x6230U, 0x6231U, 0x6232U, 0x6233U, 0x6234U, 0x6235U,
0x6236U, 0x6237U, 0x6238U, 0x6239U, 0x6261U, 0x6262U, 0x6263U,
0x6264U, 0x6265U, 0x6266U, 0x6330U, 0x6331U, 0x6332U, 0x6333U,
0x6334U, 0x6335U, 0x6336U, 0x6337U, 0x6338U, 0x6339U, 0x6361U,
0x6362U, 0x6363U, 0x6364U, 0x6365U, 0x6366U, 0x6430U, 0x6431U,
0x6432U, 0x6433U, 0x6434U, 0x6435U, 0x6436U, 0x6437U, 0x6438U,
0x6439U, 0x6461U, 0x6462U, 0x6463U, 0x6464U, 0x6465U, 0x6466U,
0x6530U, 0x6531U, 0x6532U, 0x6533U, 0x6534U, 0x6535U, 0x6536U,
0x6537U, 0x6538U, 0x6539U, 0x6561U, 0x6562U, 0x6563U, 0x6564U,
0x6565U, 0x6566U, 0x6630U, 0x6631U, 0x6632U, 0x6633U, 0x6634U,
0x6635U, 0x6636U, 0x6637U, 0x6638U, 0x6639U, 0x6661U, 0x6662U,
0x6663U, 0x6664U, 0x6665U, 0x6666U
#else /* DUK_USE_INTEGER_BE */
0x3030U, 0x3130U, 0x3230U, 0x3330U, 0x3430U, 0x3530U, 0x3630U,
0x3730U, 0x3830U, 0x3930U, 0x6130U, 0x6230U, 0x6330U, 0x6430U,
0x6530U, 0x6630U, 0x3031U, 0x3131U, 0x3231U, 0x3331U, 0x3431U,
0x3531U, 0x3631U, 0x3731U, 0x3831U, 0x3931U, 0x6131U, 0x6231U,
0x6331U, 0x6431U, 0x6531U, 0x6631U, 0x3032U, 0x3132U, 0x3232U,
0x3332U, 0x3432U, 0x3532U, 0x3632U, 0x3732U, 0x3832U, 0x3932U,
0x6132U, 0x6232U, 0x6332U, 0x6432U, 0x6532U, 0x6632U, 0x3033U,
0x3133U, 0x3233U, 0x3333U, 0x3433U, 0x3533U, 0x3633U, 0x3733U,
0x3833U, 0x3933U, 0x6133U, 0x6233U, 0x6333U, 0x6433U, 0x6533U,
0x6633U, 0x3034U, 0x3134U, 0x3234U, 0x3334U, 0x3434U, 0x3534U,
0x3634U, 0x3734U, 0x3834U, 0x3934U, 0x6134U, 0x6234U, 0x6334U,
0x6434U, 0x6534U, 0x6634U, 0x3035U, 0x3135U, 0x3235U, 0x3335U,
0x3435U, 0x3535U, 0x3635U, 0x3735U, 0x3835U, 0x3935U, 0x6135U,
0x6235U, 0x6335U, 0x6435U, 0x6535U, 0x6635U, 0x3036U, 0x3136U,
0x3236U, 0x3336U, 0x3436U, 0x3536U, 0x3636U, 0x3736U, 0x3836U,
0x3936U, 0x6136U, 0x6236U, 0x6336U, 0x6436U, 0x6536U, 0x6636U,
0x3037U, 0x3137U, 0x3237U, 0x3337U, 0x3437U, 0x3537U, 0x3637U,
0x3737U, 0x3837U, 0x3937U, 0x6137U, 0x6237U, 0x6337U, 0x6437U,
0x6537U, 0x6637U, 0x3038U, 0x3138U, 0x3238U, 0x3338U, 0x3438U,
0x3538U, 0x3638U, 0x3738U, 0x3838U, 0x3938U, 0x6138U, 0x6238U,
0x6338U, 0x6438U, 0x6538U, 0x6638U, 0x3039U, 0x3139U, 0x3239U,
0x3339U, 0x3439U, 0x3539U, 0x3639U, 0x3739U, 0x3839U, 0x3939U,
0x6139U, 0x6239U, 0x6339U, 0x6439U, 0x6539U, 0x6639U, 0x3061U,
0x3161U, 0x3261U, 0x3361U, 0x3461U, 0x3561U, 0x3661U, 0x3761U,
0x3861U, 0x3961U, 0x6161U, 0x6261U, 0x6361U, 0x6461U, 0x6561U,
0x6661U, 0x3062U, 0x3162U, 0x3262U, 0x3362U, 0x3462U, 0x3562U,
0x3662U, 0x3762U, 0x3862U, 0x3962U, 0x6162U, 0x6262U, 0x6362U,
0x6462U, 0x6562U, 0x6662U, 0x3063U, 0x3163U, 0x3263U, 0x3363U,
0x3463U, 0x3563U, 0x3663U, 0x3763U, 0x3863U, 0x3963U, 0x6163U,
0x6263U, 0x6363U, 0x6463U, 0x6563U, 0x6663U, 0x3064U, 0x3164U,
0x3264U, 0x3364U, 0x3464U, 0x3564U, 0x3664U, 0x3764U, 0x3864U,
0x3964U, 0x6164U, 0x6264U, 0x6364U, 0x6464U, 0x6564U, 0x6664U,
0x3065U, 0x3165U, 0x3265U, 0x3365U, 0x3465U, 0x3565U, 0x3665U,
0x3765U, 0x3865U, 0x3965U, 0x6165U, 0x6265U, 0x6365U, 0x6465U,
0x6565U, 0x6665U, 0x3066U, 0x3166U, 0x3266U, 0x3366U, 0x3466U,
0x3566U, 0x3666U, 0x3766U, 0x3866U, 0x3966U, 0x6166U, 0x6266U,
0x6366U, 0x6466U, 0x6566U, 0x6666U
#endif /* DUK_USE_INTEGER_BE */
};
#endif /* DUK_USE_HEX_FASTPATH */
/*
* Arbitrary byteswap for potentially unaligned values
*
* Used to byteswap pointers e.g. in debugger code.
*/
#if defined(DUK_USE_DEBUGGER_SUPPORT) /* For now only needed by the debugger. \
*/
DUK_INTERNAL void duk_byteswap_bytes(duk_uint8_t *p, duk_small_uint_t len) {
duk_uint8_t tmp;
duk_uint8_t *q = p + len - 1;
while (p - q < 0) {
tmp = *p;
*p = *q;
*q = tmp;
p++;
q--;
}
}
#endif
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