encode.c File Reference

#include "postgres.h"
#include <ctype.h>
#include "mb/pg_wchar.h"
#include "port/simd.h"
#include "utils/builtins.h"
#include "utils/memutils.h"
#include "varatt.h"

Include dependency graph for encode.c:

Go to the source code of this file.

Data Structures
struct	pg_encoding

Macros
#define	VAL(CH)   ((CH) - '0')
#define	DIG(VAL)   ((VAL) + '0')

Functions
static const struct pg_encoding *	pg_find_encoding (const char *name)
Datum	binary_encode (PG_FUNCTION_ARGS)
Datum	binary_decode (PG_FUNCTION_ARGS)
static uint64	hex_encode_scalar (const char *src, size_t len, char *dst)
uint64	hex_encode (const char *src, size_t len, char *dst)
static bool	get_hex (const char *cp, char *out)
uint64	hex_decode (const char *src, size_t len, char *dst)
static uint64	hex_decode_safe_scalar (const char *src, size_t len, char *dst, Node *escontext)
uint64	hex_decode_safe (const char *src, size_t len, char *dst, Node *escontext)
static uint64	hex_enc_len (const char *src, size_t srclen)
static uint64	hex_dec_len (const char *src, size_t srclen)
static uint64	pg_base64_encode_internal (const char *src, size_t len, char *dst, bool url)
static uint64	pg_base64_encode (const char *src, size_t len, char *dst)
static uint64	pg_base64url_encode (const char *src, size_t len, char *dst)
static uint64	pg_base64_decode_internal (const char *src, size_t len, char *dst, bool url)
static uint64	pg_base64_decode (const char *src, size_t len, char *dst)
static uint64	pg_base64url_decode (const char *src, size_t len, char *dst)
static uint64	pg_base64_enc_len (const char *src, size_t srclen)
static uint64	pg_base64_dec_len (const char *src, size_t srclen)
static uint64	pg_base64url_enc_len (const char *src, size_t srclen)
static uint64	pg_base64url_dec_len (const char *src, size_t srclen)
static uint64	esc_encode (const char *src, size_t srclen, char *dst)
static uint64	esc_decode (const char *src, size_t srclen, char *dst)
static uint64	esc_enc_len (const char *src, size_t srclen)
static uint64	esc_dec_len (const char *src, size_t srclen)

Variables
static const char	hextbl [512]
static const int8	hexlookup [128]
static const char	_base64 []
static const char	_base64url []
static const int8	b64lookup [128]
struct {
const char *   name
struct pg_encoding   enc
}	enclist []

Macro Definition Documentation

DIG

#define DIG

(

VAL

)

((VAL) + '0')

Definition at line 675 of file encode.c.

VAL

#define VAL

(

CH

)

((CH) - '0')

Definition at line 674 of file encode.c.

Function Documentation

binary_decode()

Datum binary_decode

(

PG_FUNCTION_ARGS

)

Definition at line 99 of file encode.c.

{
    text       *data = PG_GETARG_TEXT_PP(0);
    Datum       name = PG_GETARG_DATUM(1);
    bytea      *result;
    char       *namebuf;
    char       *dataptr;
    size_t      datalen;
    uint64      resultlen;
    uint64      res;
    const struct pg_encoding *enc;
 
    namebuf = TextDatumGetCString(name);
 
    enc = pg_find_encoding(namebuf);
    if (enc == NULL)
        ereport(ERROR,
                (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
                 errmsg("unrecognized encoding: \"%s\"", namebuf),
                 errhint("Valid encodings are \"%s\", \"%s\", \"%s\", and \"%s\".",
                         "base64", "base64url", "escape", "hex")));
 
    dataptr = VARDATA_ANY(data);
    datalen = VARSIZE_ANY_EXHDR(data);
 
    resultlen = enc->decode_len(dataptr, datalen);
 
    /*
     * resultlen possibly overflows uint32, therefore on 32-bit machines it's
     * unsafe to rely on palloc's internal check.
     */
    if (resultlen > MaxAllocSize - VARHDRSZ)
        ereport(ERROR,
                (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
                 errmsg("result of decoding conversion is too large")));
 
    result = palloc(VARHDRSZ + resultlen);
 
    res = enc->decode(dataptr, datalen, VARDATA(result));
 
    /* Make this FATAL 'cause we've trodden on memory ... */
    if (res > resultlen)
        elog(FATAL, "overflow - decode estimate too small");
 
    SET_VARSIZE(result, VARHDRSZ + res);
 
    PG_RETURN_BYTEA_P(result);
}

References data, pg_encoding::decode, pg_encoding::decode_len, elog, enc, ereport, errcode(), errhint(), errmsg(), ERROR, FATAL, fb(), MaxAllocSize, name, palloc(), pg_find_encoding(), PG_GETARG_DATUM, PG_GETARG_TEXT_PP, PG_RETURN_BYTEA_P, SET_VARSIZE(), TextDatumGetCString, VARDATA(), VARDATA_ANY(), VARHDRSZ, and VARSIZE_ANY_EXHDR().

binary_encode()

Datum binary_encode

(

PG_FUNCTION_ARGS

)

Definition at line 49 of file encode.c.

{
    bytea      *data = PG_GETARG_BYTEA_PP(0);
    Datum       name = PG_GETARG_DATUM(1);
    text       *result;
    char       *namebuf;
    char       *dataptr;
    size_t      datalen;
    uint64      resultlen;
    uint64      res;
    const struct pg_encoding *enc;
 
    namebuf = TextDatumGetCString(name);
 
    enc = pg_find_encoding(namebuf);
    if (enc == NULL)
        ereport(ERROR,
                (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
                 errmsg("unrecognized encoding: \"%s\"", namebuf),
                 errhint("Valid encodings are \"%s\", \"%s\", \"%s\", and \"%s\".",
                         "base64", "base64url", "escape", "hex")));
 
    dataptr = VARDATA_ANY(data);
    datalen = VARSIZE_ANY_EXHDR(data);
 
    resultlen = enc->encode_len(dataptr, datalen);
 
    /*
     * resultlen possibly overflows uint32, therefore on 32-bit machines it's
     * unsafe to rely on palloc's internal check.
     */
    if (resultlen > MaxAllocSize - VARHDRSZ)
        ereport(ERROR,
                (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
                 errmsg("result of encoding conversion is too large")));
 
    result = palloc(VARHDRSZ + resultlen);
 
    res = enc->encode(dataptr, datalen, VARDATA(result));
 
    /* Make this FATAL 'cause we've trodden on memory ... */
    if (res > resultlen)
        elog(FATAL, "overflow - encode estimate too small");
 
    SET_VARSIZE(result, VARHDRSZ + res);
 
    PG_RETURN_TEXT_P(result);
}

References data, elog, enc, pg_encoding::encode, pg_encoding::encode_len, ereport, errcode(), errhint(), errmsg(), ERROR, FATAL, fb(), MaxAllocSize, name, palloc(), pg_find_encoding(), PG_GETARG_BYTEA_PP, PG_GETARG_DATUM, PG_RETURN_TEXT_P, SET_VARSIZE(), TextDatumGetCString, VARDATA(), VARDATA_ANY(), VARHDRSZ, and VARSIZE_ANY_EXHDR().

esc_dec_len()

static uint64 esc_dec_len ( const char *  src, size_t  srclen  )

static

Definition at line 786 of file encode.c.

{
    const char *end = src + srclen;
    uint64      len = 0;
 
    while (src < end)
    {
        if (src[0] != '\\')
            src++;
        else if (src + 3 < end &&
                 (src[1] >= '0' && src[1] <= '3') &&
                 (src[2] >= '0' && src[2] <= '7') &&
                 (src[3] >= '0' && src[3] <= '7'))
        {
            /*
             * backslash + valid octal
             */
            src += 4;
        }
        else if (src + 1 < end &&
                 (src[1] == '\\'))
        {
            /*
             * two backslashes = backslash
             */
            src += 2;
        }
        else
        {
            /*
             * one backslash, not followed by ### valid octal
             */
            ereport(ERROR,
                    (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
                     errmsg("invalid input syntax for type %s", "bytea")));
        }
 
        len++;
    }
    return len;
}

References ereport, errcode(), errmsg(), ERROR, fb(), and len.

esc_decode()

static uint64 esc_decode ( const char *  src, size_t  srclen, char *  dst  )

static

Definition at line 717 of file encode.c.

{
    const char *end = src + srclen;
    char       *rp = dst;
    uint64      len = 0;
 
    while (src < end)
    {
        if (src[0] != '\\')
            *rp++ = *src++;
        else if (src + 3 < end &&
                 (src[1] >= '0' && src[1] <= '3') &&
                 (src[2] >= '0' && src[2] <= '7') &&
                 (src[3] >= '0' && src[3] <= '7'))
        {
            int         val;
 
            val = VAL(src[1]);
            val <<= 3;
            val += VAL(src[2]);
            val <<= 3;
            *rp++ = val + VAL(src[3]);
            src += 4;
        }
        else if (src + 1 < end &&
                 (src[1] == '\\'))
        {
            *rp++ = '\\';
            src += 2;
        }
        else
        {
            /*
             * One backslash, not followed by ### valid octal. Should never
             * get here, since esc_dec_len does same check.
             */
            ereport(ERROR,
                    (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
                     errmsg("invalid input syntax for type %s", "bytea")));
        }
 
        len++;
    }
 
    return len;
}

References ereport, errcode(), errmsg(), ERROR, fb(), len, VAL, and val.

esc_enc_len()

static uint64 esc_enc_len ( const char *  src, size_t  srclen  )

static

Definition at line 765 of file encode.c.

{
    const char *end = src + srclen;
    uint64      len = 0;
 
    while (src < end)
    {
        if (*src == '\0' || IS_HIGHBIT_SET(*src))
            len += 4;
        else if (*src == '\\')
            len += 2;
        else
            len++;
 
        src++;
    }
 
    return len;
}

References fb(), IS_HIGHBIT_SET, and len.

esc_encode()

static uint64 esc_encode ( const char *  src, size_t  srclen, char *  dst  )

static

Definition at line 678 of file encode.c.

{
    const char *end = src + srclen;
    char       *rp = dst;
    uint64      len = 0;
 
    while (src < end)
    {
        unsigned char c = (unsigned char) *src;
 
        if (c == '\0' || IS_HIGHBIT_SET(c))
        {
            rp[0] = '\\';
            rp[1] = DIG(c >> 6);
            rp[2] = DIG((c >> 3) & 7);
            rp[3] = DIG(c & 7);
            rp += 4;
            len += 4;
        }
        else if (c == '\\')
        {
            rp[0] = '\\';
            rp[1] = '\\';
            rp += 2;
            len += 2;
        }
        else
        {
            *rp++ = c;
            len++;
        }
 
        src++;
    }
 
    return len;
}

References DIG, fb(), IS_HIGHBIT_SET, and len.

get_hex()

static bool get_hex ( const char *  cp, char *  out  )

inlinestatic

Definition at line 251 of file encode.c.

{
    unsigned char c = (unsigned char) *cp;
    int         res = -1;
 
    if (c < 127)
        res = hexlookup[c];
 
    *out = (char) res;
 
    return (res >= 0);
}

References fb(), and hexlookup.

Referenced by hex_decode_safe_scalar().

hex_dec_len()

static uint64 hex_dec_len ( const char *  src, size_t  srclen  )

static

Definition at line 397 of file encode.c.

{
    return (uint64) srclen >> 1;
}

References fb().

hex_decode()

uint64 hex_decode	(	const char *	src,
		size_t	len,
		char *	dst
	)

Definition at line 265 of file encode.c.

{
    return hex_decode_safe(src, len, dst, NULL);
}

References fb(), hex_decode_safe(), and len.

hex_decode_safe()

uint64 hex_decode_safe	(	const char *	src,
		size_t	len,
		char *	dst,
		Node *	escontext
	)

Definition at line 351 of file encode.c.

{
#ifdef USE_NO_SIMD
    return hex_decode_safe_scalar(src, len, dst, escontext);
#else
    const uint64 tail_idx = len & ~(sizeof(Vector8) * 2 - 1);
    uint64      i;
    bool        success = true;
 
    /*
     * We must process 2 vectors at a time since the output will be half the
     * length of the input.
     */
    for (i = 0; i < tail_idx; i += sizeof(Vector8) * 2)
    {
        Vector8     srcv;
        Vector8     dstv1;
        Vector8     dstv2;
 
        vector8_load(&srcv, (const uint8 *) &src[i]);
        success &= hex_decode_simd_helper(srcv, &dstv1);
 
        vector8_load(&srcv, (const uint8 *) &src[i + sizeof(Vector8)]);
        success &= hex_decode_simd_helper(srcv, &dstv2);
 
        vector8_store((uint8 *) &dst[i / 2], vector8_pack_16(dstv1, dstv2));
    }
 
    /*
     * If something didn't look right in the vector path, try again in the
     * scalar path so that we can handle it correctly.
     */
    if (!success)
        i = 0;
 
    return i / 2 + hex_decode_safe_scalar(src + i, len - i, dst + i / 2, escontext);
#endif
}

References fb(), hex_decode_safe_scalar(), i, len, success, and vector8_load().

Referenced by byteain(), and hex_decode().

hex_decode_safe_scalar()

static uint64 hex_decode_safe_scalar ( const char *  src, size_t  len, char *  dst, Node *  escontext  )

inlinestatic

Definition at line 271 of file encode.c.

{
    const char *s,
               *srcend;
    char        v1,
                v2,
               *p;
 
    srcend = src + len;
    s = src;
    p = dst;
    while (s < srcend)
    {
        if (*s == ' ' || *s == '\n' || *s == '\t' || *s == '\r')
        {
            s++;
            continue;
        }
        if (!get_hex(s, &v1))
            ereturn(escontext, 0,
                    (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
                     errmsg("invalid hexadecimal digit: \"%.*s\"",
                            pg_mblen(s), s)));
        s++;
        if (s >= srcend)
            ereturn(escontext, 0,
                    (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
                     errmsg("invalid hexadecimal data: odd number of digits")));
        if (!get_hex(s, &v2))
            ereturn(escontext, 0,
                    (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
                     errmsg("invalid hexadecimal digit: \"%.*s\"",
                            pg_mblen(s), s)));
        s++;
        *p++ = (v1 << 4) | v2;
    }
 
    return p - dst;
}

References ereturn, errcode(), errmsg(), fb(), get_hex(), len, and pg_mblen().

Referenced by hex_decode_safe().

hex_enc_len()

static uint64 hex_enc_len ( const char *  src, size_t  srclen  )

static

Definition at line 391 of file encode.c.

{
    return (uint64) srclen << 1;
}

References fb().

hex_encode()

uint64 hex_encode	(	const char *	src,
		size_t	len,
		char *	dst
	)

Definition at line 202 of file encode.c.

{
#ifdef USE_NO_SIMD
    return hex_encode_scalar(src, len, dst);
#else
    const uint64 tail_idx = len & ~(sizeof(Vector8) - 1);
    uint64      i;
 
    /*
     * This splits the high and low nibbles of each byte into separate
     * vectors, adds the vectors to a mask that converts the nibbles to their
     * equivalent ASCII bytes, and interleaves those bytes back together to
     * form the final hex-encoded string.
     */
    for (i = 0; i < tail_idx; i += sizeof(Vector8))
    {
        Vector8     srcv;
        Vector8     lo;
        Vector8     hi;
        Vector8     mask;
 
        vector8_load(&srcv, (const uint8 *) &src[i]);
 
        lo = vector8_and(srcv, vector8_broadcast(0x0f));
        mask = vector8_gt(lo, vector8_broadcast(0x9));
        mask = vector8_and(mask, vector8_broadcast('a' - '0' - 10));
        mask = vector8_add(mask, vector8_broadcast('0'));
        lo = vector8_add(lo, mask);
 
        hi = vector8_and(srcv, vector8_broadcast(0xf0));
        hi = vector8_shift_right(hi, 4);
        mask = vector8_gt(hi, vector8_broadcast(0x9));
        mask = vector8_and(mask, vector8_broadcast('a' - '0' - 10));
        mask = vector8_add(mask, vector8_broadcast('0'));
        hi = vector8_add(hi, mask);
 
        vector8_store((uint8 *) &dst[i * 2],
                      vector8_interleave_low(hi, lo));
        vector8_store((uint8 *) &dst[i * 2 + sizeof(Vector8)],
                      vector8_interleave_high(hi, lo));
    }
 
    (void) hex_encode_scalar(src + i, len - i, dst + i * 2);
 
    return (uint64) len * 2;
#endif
}

References fb(), hex_encode_scalar(), i, len, vector8_broadcast(), and vector8_load().

Referenced by AddFileToBackupManifest(), byteaout(), and SendBackupManifest().

hex_encode_scalar()

static uint64 hex_encode_scalar ( const char *  src, size_t  len, char *  dst  )

inlinestatic

Definition at line 186 of file encode.c.

{
    const char *end = src + len;
 
    while (src < end)
    {
        unsigned char usrc = *((const unsigned char *) src);
 
        memcpy(dst, &hextbl[2 * usrc], 2);
        src++;
        dst += 2;
    }
    return (uint64) len * 2;
}

References fb(), hextbl, and len.

Referenced by hex_encode().

pg_base64_dec_len()

static uint64 pg_base64_dec_len ( const char *  src, size_t  srclen  )

static

Definition at line 629 of file encode.c.

{
    return ((uint64) srclen * 3) >> 2;
}

References fb().

pg_base64_decode()

static uint64 pg_base64_decode ( const char *  src, size_t  len, char *  dst  )

static

Definition at line 610 of file encode.c.

{
    return pg_base64_decode_internal(src, len, dst, false);
}

References fb(), len, and pg_base64_decode_internal().

pg_base64_decode_internal()

static uint64 pg_base64_decode_internal ( const char *  src, size_t  len, char *  dst, bool  url  )

static

Definition at line 510 of file encode.c.

{
    const char *srcend = src + len,
               *s = src;
    char       *p = dst;
    char        c;
    int         b = 0;
    uint32      buf = 0;
    int         pos = 0,
                end = 0;
 
    while (s < srcend)
    {
        c = *s++;
 
        if (c == ' ' || c == '\t' || c == '\n' || c == '\r')
            continue;
 
        /* convert base64url to base64 */
        if (url)
        {
            if (c == '-')
                c = '+';
            else if (c == '_')
                c = '/';
        }
 
        if (c == '=')
        {
            /* end sequence */
            if (!end)
            {
                if (pos == 2)
                    end = 1;
                else if (pos == 3)
                    end = 2;
                else
                {
                    /* translator: %s is the name of an encoding scheme */
                    ereport(ERROR,
                            (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
                             errmsg("unexpected \"=\" while decoding %s sequence", url ? "base64url" : "base64")));
                }
            }
            b = 0;
        }
        else
        {
            b = -1;
            if (c > 0 && c < 127)
                b = b64lookup[(unsigned char) c];
            if (b < 0)
            {
                /* translator: %s is the name of an encoding scheme */
                ereport(ERROR,
                        (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
                         errmsg("invalid symbol \"%.*s\" found while decoding %s sequence",
                                pg_mblen(s - 1), s - 1,
                                url ? "base64url" : "base64")));
            }
        }
        /* add it to buffer */
        buf = (buf << 6) + b;
        pos++;
        if (pos == 4)
        {
            *p++ = (buf >> 16) & 255;
            if (end == 0 || end > 1)
                *p++ = (buf >> 8) & 255;
            if (end == 0 || end > 2)
                *p++ = buf & 255;
            buf = 0;
            pos = 0;
        }
    }
 
    if (pos == 2)
    {
        buf <<= 12;
        *p++ = (buf >> 16) & 0xFF;
    }
    else if (pos == 3)
    {
        buf <<= 6;
        *p++ = (buf >> 16) & 0xFF;
        *p++ = (buf >> 8) & 0xFF;
    }
    else if (pos != 0)
    {
        /* translator: %s is the name of an encoding scheme */
        ereport(ERROR,
                (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
                 errmsg("invalid %s end sequence", url ? "base64url" : "base64"),
                 errhint("Input data is missing padding, is truncated, or is otherwise corrupted.")));
    }
 
    return p - dst;
}

References b, b64lookup, buf, ereport, errcode(), errhint(), errmsg(), ERROR, fb(), len, and pg_mblen().

Referenced by pg_base64_decode(), and pg_base64url_decode().

pg_base64_enc_len()

static uint64 pg_base64_enc_len ( const char *  src, size_t  srclen  )

static

Definition at line 622 of file encode.c.

{
    /* 3 bytes will be converted to 4, linefeed after 76 chars */
    return ((uint64) srclen + 2) / 3 * 4 + (uint64) srclen / (76 * 3 / 4);
}

References fb().

pg_base64_encode()

static uint64 pg_base64_encode ( const char *  src, size_t  len, char *  dst  )

static

Definition at line 492 of file encode.c.

{
    return pg_base64_encode_internal(src, len, dst, false);
}

References fb(), len, and pg_base64_encode_internal().

pg_base64_encode_internal()

static uint64 pg_base64_encode_internal ( const char *  src, size_t  len, char *  dst, bool  url  )

static

Definition at line 431 of file encode.c.

{
    char       *p,
               *lend = dst + 76;
    const char *s,
               *end = src + len;
    int         pos = 2;
    uint32      buf = 0;
    const char *alphabet = url ? _base64url : _base64;
 
    s = src;
    p = dst;
 
    while (s < end)
    {
        buf |= (unsigned char) *s << (pos << 3);
        pos--;
        s++;
 
        /* write it out */
        if (pos < 0)
        {
            *p++ = alphabet[(buf >> 18) & 0x3f];
            *p++ = alphabet[(buf >> 12) & 0x3f];
            *p++ = alphabet[(buf >> 6) & 0x3f];
            *p++ = alphabet[buf & 0x3f];
 
            pos = 2;
            buf = 0;
 
            if (!url && p >= lend)
            {
                *p++ = '\n';
                lend = p + 76;
            }
        }
    }
 
    /* Handle remaining bytes in buf */
    if (pos != 2)
    {
        *p++ = alphabet[(buf >> 18) & 0x3f];
        *p++ = alphabet[(buf >> 12) & 0x3f];
 
        if (pos == 0)
        {
            *p++ = alphabet[(buf >> 6) & 0x3f];
            if (!url)
                *p++ = '=';
        }
        else if (!url)
        {
            *p++ = '=';
            *p++ = '=';
        }
    }
 
    return p - dst;
}

References _base64, _base64url, buf, fb(), and len.

Referenced by pg_base64_encode(), and pg_base64url_encode().

pg_base64url_dec_len()

static uint64 pg_base64url_dec_len ( const char *  src, size_t  srclen  )

static

Definition at line 645 of file encode.c.

{
    /*
     * For base64, each 4 characters of input produce at most 3 bytes of
     * output.  For base64url without padding, we need to round up to the
     * nearest 4
     */
    size_t      adjusted_len = srclen;
 
    if (srclen % 4 != 0)
        adjusted_len += 4 - (srclen % 4);
 
    return (adjusted_len * 3) / 4;
}

References fb().

pg_base64url_decode()

static uint64 pg_base64url_decode ( const char *  src, size_t  len, char *  dst  )

static

Definition at line 616 of file encode.c.

{
    return pg_base64_decode_internal(src, len, dst, true);
}

References fb(), len, and pg_base64_decode_internal().

pg_base64url_enc_len()

static uint64 pg_base64url_enc_len ( const char *  src, size_t  srclen  )

static

Definition at line 635 of file encode.c.

{
    /*
     * Unlike standard base64, base64url doesn't use padding characters when
     * the input length is not divisible by 3
     */
    return (srclen + 2) / 3 * 4;
}

References fb().

pg_base64url_encode()

static uint64 pg_base64url_encode ( const char *  src, size_t  len, char *  dst  )

static

Definition at line 498 of file encode.c.

{
    return pg_base64_encode_internal(src, len, dst, true);
}

References fb(), len, and pg_base64_encode_internal().

pg_find_encoding()

static const struct pg_encoding * pg_find_encoding ( const char *  name )

static

Definition at line 872 of file encode.c.

{
    int         i;
 
    for (i = 0; enclist[i].name; i++)
        if (pg_strcasecmp(enclist[i].name, name) == 0)
            return &enclist[i].enc;
 
    return NULL;
}

References enclist, fb(), i, name, and pg_strcasecmp().

Referenced by binary_decode(), and binary_encode().

Variable Documentation

_base64

const char _base64[]

static

Initial value:

=
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"

Definition at line 406 of file encode.c.

Referenced by pg_base64_encode_internal().

_base64url

const char _base64url[]

static

Initial value:

=
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_"

Definition at line 409 of file encode.c.

Referenced by pg_base64_encode_internal().

b64lookup

const int8 b64lookup[128]

static

Initial value:

= {
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
    52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
    -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
    15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
    -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
    41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1,
}

Definition at line 412 of file encode.c.

                                   {
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
    52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
    -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
    15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
    -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
    41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1,
};

Referenced by pg_base64_decode_internal().

enc

struct pg_encoding enc

Definition at line 835 of file encode.c.

Referenced by binary_decode(), and binary_encode().

[struct]

const struct { ... } enclist[]

Referenced by pg_find_encoding().

hexlookup

const int8 hexlookup[128]

static

Initial value:

= {
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1,
    -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
}

Definition at line 174 of file encode.c.

                                   {
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1,
    -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
};

Referenced by get_hex(), and get_hex().

hextbl

const char hextbl[512]

static

Initial value:

=
"000102030405060708090a0b0c0d0e0f"
"101112131415161718191a1b1c1d1e1f"
"202122232425262728292a2b2c2d2e2f"
"303132333435363738393a3b3c3d3e3f"
"404142434445464748494a4b4c4d4e4f"
"505152535455565758595a5b5c5d5e5f"
"606162636465666768696a6b6c6d6e6f"
"707172737475767778797a7b7c7d7e7f"
"808182838485868788898a8b8c8d8e8f"
"909192939495969798999a9b9c9d9e9f"
"a0a1a2a3a4a5a6a7a8a9aaabacadaeaf"
"b0b1b2b3b4b5b6b7b8b9babbbcbdbebf"
"c0c1c2c3c4c5c6c7c8c9cacbcccdcecf"
"d0d1d2d3d4d5d6d7d8d9dadbdcdddedf"
"e0e1e2e3e4e5e6e7e8e9eaebecedeeef"
"f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff"

Definition at line 156 of file encode.c.

Referenced by hex_encode_scalar().

name

const char* name

Definition at line 834 of file encode.c.

Referenced by binary_decode(), binary_encode(), and pg_find_encoding().