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Copy pathp21sql.c
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3512 lines (3352 loc) · 88.4 KB
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/* Generated by re2c 1.0.3 on Mon Apr 6 21:17:12 2020 */
#line 1 "p21sql.l"
/*
** 2015-08-12
**
** The author disclaims copyright to this source code. In place of
** a legal notice, here is a blessing:
**
** May you do good and not evil.
** May you find forgiveness for yourself and forgive others.
** May you share freely, never taking more than you give.
**
******************************************************************************
**
** This SQLite extension implements P21 functions. The interface is
** modeled after MySQL JSON functions:
**
** https://dev.mysql.com/doc/refman/5.7/en/json.html
**
** For the time being, all P21 params are stored as pure text.
*/
#if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_P21SQL)
#if !defined(SQLITEINT_H)
#include "sqlite3ext.h"
#endif
SQLITE_EXTENSION_INIT1
#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
/* Mark a function parameter as unused, to suppress nuisance compiler
** warnings. */
#ifndef UNUSED_PARAM
# define UNUSED_PARAM(X) (void)(X)
#endif
#ifndef LARGEST_INT64
# define LARGEST_INT64 (0xffffffff|(((sqlite3_int64)0x7fffffff)<<32))
# define SMALLEST_INT64 (((sqlite3_int64)-1) - LARGEST_INT64)
#endif
/*
** Versions of isspace(), isalnum() and isdigit() to which it is safe
** to pass signed char values.
*/
#ifdef sqlite3Isdigit
/* Use the SQLite core versions if this routine is part of the
** SQLite amalgamation */
# define safe_isdigit(x) sqlite3Isdigit(x)
# define safe_isalnum(x) sqlite3Isalnum(x)
# define safe_isxdigit(x) sqlite3Isxdigit(x)
#else
/* Use the standard library for separate compilation */
#include <ctype.h> /* amalgamator: keep */
# define safe_isdigit(x) isdigit((unsigned char)(x))
# define safe_isalnum(x) isalnum((unsigned char)(x))
# define safe_isxdigit(x) isxdigit((unsigned char)(x))
#endif
/*
** Growing our own isspace() routine this way is twice as fast as
** the library isspace() function, resulting in a 7% overall performance
** increase for the parser. (Ubuntu14.10 gcc 4.8.4 x64 with -Os).
*/
static const char p21IsSpace[] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
};
#define safe_isspace(x) (p21IsSpace[(unsigned char)x])
#ifndef SQLITE_AMALGAMATION
/* Unsigned integer types. These are already defined in the sqliteInt.h,
** but the definitions need to be repeated for separate compilation. */
typedef sqlite3_uint64 u64;
typedef unsigned int u32;
typedef unsigned short int u16;
typedef unsigned char u8;
#endif
/* some C implementations don't have these? (inttypes.h / stdint.h) */
#ifndef UINT16_WIDTH
# define UINT16_WIDTH 16
#endif
#ifndef UINT16_MAX
# define UINT16_MAX 65535
#endif
/* Objects */
typedef struct P21String P21String;
typedef struct P21Node P21Node;
typedef struct P21Parse P21Parse;
/* An instance of this object represents a P21 parameter string
** under construction. Really, this is a generic string accumulator
** that can be and is used to create strings other than JSON (here P21!).
*/
struct P21String {
sqlite3_context *pCtx; /* Function context - put error messages here */
char *zBuf; /* Append P21 content here */
u64 nAlloc; /* Bytes of storage available in zBuf[] */
u64 nUsed; /* Bytes of zBuf[] currently used */
u8 bStatic; /* True if zBuf is static space */
u8 bErr; /* True if an error has been encountered */
char zSpace[100]; /* Initial static space */
};
#define P21_EMPTY 0x1 /* optional attribute not provided : '$' */
#define P21_DERIVED 0x2 /* derived attribute not provided : '*' */
#define P21_ENUMERATION 0x3 /* (also) includes boolean and logical values */
#define P21_INTEGER 0x4
#define P21_REAL 0x5
#define P21_STRING 0x6
#define P21_BINARY 0x7
#define P21_EID 0x8 /* entity_instance_name */
#define P21_LIST 0x9
#define P21_RECORD 0xA /* simple_record */
#define P21_SUBTYPE 80 /* Ascii for "P" */
/*
** Names of the various P21 types:
*/
static const char * const p21Type[] = {
"",
"empty", "derived", "enumeration", "integer", "real",
"string", "binary", "eid", "list", "record"
};
/* Bit values for the P21Node.jnFlag field
*/
#define PNODE_RAW 0x01 /* Content is raw, not P21 encoded */
#define PNODE_ESCAPE 0x02 /* Content is text with \ escapes */
#define PNODE_REMOVE 0x04 /* Do not output */
#define PNODE_REPLACE 0x08 /* Replace with P21Node.u.iReplace */
#define PNODE_PATCH 0x10 /* Patch with P21Node.u.pPatch */
#define PNODE_APPEND 0x20 /* More ARRAY/OBJECT entries at u.iAppend */
#define PNODE_LABEL 0x40 /* Is a label of an object */
/* A single node of parsed P21 params
*/
struct P21Node {
u8 eType; /* One of the P21_ type values */
u8 jnFlags; /* P21Node flags */
u16 n_kw; /* store the KEYWORD length */
u32 n; /* Bytes of content, or number of sub-nodes */
union {
const char *zJContent; /* Content for INT, REAL, and STRING */
u32 iAppend; /* More terms for ARRAY and OBJECT */
u32 iKey; /* Key for ARRAY objects in p21_tree() */
u32 iReplace; /* Replacement content for PNODE_REPLACE */
P21Node *pPatch; /* Node chain of patch for PNODE_PATCH */
} u;
};
/* A completely parsed P21 string
*/
struct P21Parse {
u32 nNode; /* Number of slots of aNode[] used */
u32 nAlloc; /* Number of slots of aNode[] allocated */
P21Node *aNode; /* Array of nodes containing the parse */
const char *zP21; /* Original P21 string */
u32 *aUp; /* Index of parent of each node */
u8 oom; /* Set to true if out of memory */
u8 nErr; /* Number of errors seen */
u16 iDepth; /* Nesting depth */
int nP21; /* Length of the zP21 string in bytes */
u32 iHold; /* Replace cache line with the lowest iHold value */
};
/*
** Maximum nesting depth of P21 for this implementation.
*/
#define P21_MAX_DEPTH 20
/**************************************************************************
** Utility routines for dealing with P21String objects
**************************************************************************/
/* Set the P21String object to an empty string
*/
static void p21Zero(P21String *p){
p->zBuf = p->zSpace;
p->nAlloc = sizeof(p->zSpace);
p->nUsed = 0;
p->bStatic = 1;
}
/* Initialize the P21String object
*/
static void p21Init(P21String *p, sqlite3_context *pCtx){
p->pCtx = pCtx;
p->bErr = 0;
p21Zero(p);
}
/* Free all allocated memory and reset the P21String object back to its
** initial state.
*/
static void p21Reset(P21String *p){
if( !p->bStatic ) sqlite3_free(p->zBuf);
p21Zero(p);
}
/* Report an out-of-memory (OOM) condition
*/
static void p21Oom(P21String *p){
p->bErr = 1;
sqlite3_result_error_nomem(p->pCtx);
p21Reset(p);
}
/* Enlarge p->zBuf so that it can hold at least N more bytes.
** Return zero on success. Return non-zero on an OOM error
*/
static int p21Grow(P21String *p, u32 N){
u64 nTotal = N<p->nAlloc ? p->nAlloc*2 : p->nAlloc+N+10;
char *zNew;
if( p->bStatic ){
if( p->bErr ) return 1;
zNew = sqlite3_malloc64(nTotal);
if( zNew==0 ){
p21Oom(p);
return SQLITE_NOMEM;
}
memcpy(zNew, p->zBuf, (size_t)p->nUsed);
p->zBuf = zNew;
p->bStatic = 0;
}else{
zNew = sqlite3_realloc64(p->zBuf, nTotal);
if( zNew==0 ){
p21Oom(p);
return SQLITE_NOMEM;
}
p->zBuf = zNew;
}
p->nAlloc = nTotal;
return SQLITE_OK;
}
/* Append N bytes from zIn onto the end of the P21String string.
*/
static void p21AppendRaw(P21String *p, const char *zIn, u32 N){
if( (N+p->nUsed >= p->nAlloc) && p21Grow(p,N)!=0 ) return;
memcpy(p->zBuf+p->nUsed, zIn, N);
p->nUsed += N;
}
/* Append formatted text (not to exceed N bytes) to the P21String.
*/
static void p21Printf(int N, P21String *p, const char *zFormat, ...){
va_list ap;
if( (p->nUsed + N >= p->nAlloc) && p21Grow(p, N) ) return;
va_start(ap, zFormat);
sqlite3_vsnprintf(N, p->zBuf+p->nUsed, zFormat, ap);
va_end(ap);
p->nUsed += (int)strlen(p->zBuf+p->nUsed);
}
/* Append a single character
*/
static void p21AppendChar(P21String *p, char c){
if( p->nUsed>=p->nAlloc && p21Grow(p,1)!=0 ) return;
p->zBuf[p->nUsed++] = c;
}
/* Append a comma separator to the output buffer, if the previous
** character is not '[' or '{'.
*/
static void p21AppendSeparator(P21String *p){
char c;
if( p->nUsed==0 ) return;
c = p->zBuf[p->nUsed-1];
if( c!='(' ) p21AppendChar(p, ',');
}
/* Append the N-byte string in zIn to the end of the P21String string
** under construction. Enclose the string in '...' and escape
** any double-quotes or backslash characters contained within the
** string.
*/
static void p21AppendString(P21String *p, const char *zIn, u32 N){
u32 i;
if( (N+p->nUsed+2 >= p->nAlloc) && p21Grow(p,N+2)!=0 ) return;
p->zBuf[p->nUsed++] = '\'';
for(i=0; i<N; i++){
unsigned char c = ((unsigned const char*)zIn)[i];
/* TODO: string escapes are different e.g. '' */
if( c=='\'' || c=='\\' ){
p21_simple_escape:
if( (p->nUsed+N+3-i > p->nAlloc) && p21Grow(p,N+3-i)!=0 ) return;
p->zBuf[p->nUsed++] = '\\';
}else if( c<=0x1f ){
static const char aSpecial[] = {
0, 0, 0, 0, 0, 0, 0, 0, 'b', 't', 'n', 0, 'f', 'r', 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
assert( sizeof(aSpecial)==32 );
assert( aSpecial['\b']=='b' );
assert( aSpecial['\f']=='f' );
assert( aSpecial['\n']=='n' );
assert( aSpecial['\r']=='r' );
assert( aSpecial['\t']=='t' );
if( aSpecial[c] ){
c = aSpecial[c];
goto p21_simple_escape;
}
if( (p->nUsed+N+7+i > p->nAlloc) && p21Grow(p,N+7-i)!=0 ) return;
p->zBuf[p->nUsed++] = '\\';
p->zBuf[p->nUsed++] = 'u';
p->zBuf[p->nUsed++] = '0';
p->zBuf[p->nUsed++] = '0';
p->zBuf[p->nUsed++] = '0' + (c>>4);
c = "0123456789abcdef"[c&0xf];
}
p->zBuf[p->nUsed++] = c;
}
p->zBuf[p->nUsed++] = '\'';
assert( p->nUsed<p->nAlloc );
}
/*
** Append a function parameter value to the P21 string under
** construction.
*/
static void p21AppendValue(
P21String *p, /* Append to this P21 string */
sqlite3_value *pValue /* Value to append */
){
switch( sqlite3_value_type(pValue) ){
case SQLITE_NULL: {
p21AppendRaw(p, "$", 1);
break;
}
case SQLITE_INTEGER:
case SQLITE_FLOAT: {
const char *z = (const char*)sqlite3_value_text(pValue);
/* TODO: confirm format is valid */
u32 n = (u32)sqlite3_value_bytes(pValue);
p21AppendRaw(p, z, n);
break;
}
case SQLITE_TEXT: {
const char *z = (const char*)sqlite3_value_text(pValue);
u32 n = (u32)sqlite3_value_bytes(pValue);
if( sqlite3_value_subtype(pValue)==P21_SUBTYPE ){
p21AppendRaw(p, z, n);
}else{
p21AppendString(p, z, n);
}
break;
}
default: {
if( p->bErr==0 ){
sqlite3_result_error(p->pCtx, "P21 cannot hold BLOB values", -1);
p->bErr = 2;
p21Reset(p);
}
break;
}
}
}
/* Make the P21 in p the result of the SQL function.
*/
static void p21Result(P21String *p){
if( p->bErr==0 ){
sqlite3_result_text64(p->pCtx, p->zBuf, p->nUsed,
p->bStatic ? SQLITE_TRANSIENT : sqlite3_free,
SQLITE_UTF8);
p21Zero(p);
}
assert( p->bStatic );
}
/**************************************************************************
** Utility routines for dealing with P21Node and P21Parse objects
**************************************************************************/
/*
** Return the number of consecutive P21Node slots need to represent
** the parsed P21 at pNode. The minimum answer is 1. For ARRAY and
** OBJECT types, the number might be larger.
**
** Appended elements are not counted. The value returned is the number
** by which the P21Node counter should increment in order to go to the
** next peer value.
*/
static u32 p21NodeSize(P21Node *pNode){
return pNode->eType < P21_LIST ? 1 : pNode->n + 1;
}
/*
** Reclaim all memory allocated by a P21Parse object. But do not
** delete the P21Parse object itself.
*/
static void p21ParseReset(P21Parse *pParse){
sqlite3_free(pParse->aNode);
pParse->aNode = 0;
pParse->nNode = 0;
pParse->nAlloc = 0;
sqlite3_free(pParse->aUp);
pParse->aUp = 0;
}
/*
** Free a P21Parse object that was obtained from sqlite3_malloc().
*/
static void p21ParseFree(P21Parse *pParse){
p21ParseReset(pParse);
sqlite3_free(pParse);
}
/*
** Convert the P21Node pNode into a pure P21 string and
** append to pOut. Subsubstructure is also included. Return
** the number of P21Node objects that are encoded.
*/
static void p21RenderNode(
P21Node *pNode, /* The node to render */
P21String *pOut, /* Write P21 here */
sqlite3_value **aReplace /* Replacement values */
){
if( pNode->jnFlags & (PNODE_REPLACE|PNODE_PATCH) ){
if( pNode->jnFlags & PNODE_REPLACE ){
p21AppendValue(pOut, aReplace[pNode->u.iReplace]);
return;
}
pNode = pNode->u.pPatch;
}
switch( pNode->eType ){
default: {
assert( pNode->eType==P21_EMPTY );
p21AppendChar(pOut, '$');
break;
}
case P21_ENUMERATION: {
p21AppendRaw(pOut, pNode->u.zJContent, pNode->n);
break;
}
case P21_DERIVED: {
p21AppendChar(pOut, '*');
break;
}
case P21_BINARY: {
p21AppendRaw(pOut, pNode->u.zJContent, pNode->n);
break;
}
case P21_EID: {
p21AppendRaw(pOut, pNode->u.zJContent, pNode->n);
break;
}
case P21_STRING: {
if( pNode->jnFlags & PNODE_RAW ){
p21AppendString(pOut, pNode->u.zJContent, pNode->n);
break;
}
/* Fall through into the next case */
}
case P21_REAL:
case P21_INTEGER: {
p21AppendRaw(pOut, pNode->u.zJContent, pNode->n);
break;
}
case P21_LIST: {
u32 j = 1;
p21AppendChar(pOut, '(');
for(;;){
while( j<=pNode->n ){
if( (pNode[j].jnFlags & PNODE_REMOVE)==0 ){
p21AppendSeparator(pOut);
p21RenderNode(&pNode[j], pOut, aReplace);
}
j += p21NodeSize(&pNode[j]);
}
if( (pNode->jnFlags & PNODE_APPEND)==0 ) break;
pNode = &pNode[pNode->u.iAppend];
j = 1;
}
p21AppendChar(pOut, ')');
break;
}
case P21_RECORD: {
u32 j = 1;
p21AppendRaw(pOut, pNode->u.zJContent, pNode->n_kw);
p21AppendChar(pOut, '(');
for(;;){
while( j<= pNode->n ){
if( (pNode[j].jnFlags & PNODE_REMOVE)==0 ){
p21AppendSeparator(pOut);
p21RenderNode(&pNode[j], pOut, aReplace);
}
j += p21NodeSize(&pNode[j]);
}
if( (pNode->jnFlags & PNODE_APPEND)==0 ) break;
pNode = &pNode[pNode->u.iAppend];
j = 1;
}
p21AppendChar(pOut, ')');
break;
}
}
}
/*
** Return a P21Node and all its descendents as a P21 string.
*/
static void p21ReturnP21(
P21Node *pNode, /* Node to return */
sqlite3_context *pCtx, /* Return value for this function */
sqlite3_value **aReplace /* Array of replacement values */
){
P21String s;
p21Init(&s, pCtx);
p21RenderNode(pNode, &s, aReplace);
p21Result(&s);
sqlite3_result_subtype(pCtx, P21_SUBTYPE);
}
/*
** Translate a single byte of Hex into an integer.
** This routine only works if h really is a valid hexadecimal
** character: 0..9a..fA..F
*/
static u8 p21HexToInt(int h){
assert( (h>='0' && h<='9') || (h>='a' && h<='f') || (h>='A' && h<='F') );
#ifdef SQLITE_EBCDIC
h += 9*(1&~(h>>4));
#else
h += 9*(1&(h>>6));
#endif
return (u8)(h & 0xf);
}
/*
** Convert a 4-byte hex string into an integer
*/
static u32 p21HexToInt4(const char *z){
u32 v;
assert( safe_isxdigit(z[0]) );
assert( safe_isxdigit(z[1]) );
assert( safe_isxdigit(z[2]) );
assert( safe_isxdigit(z[3]) );
v = (p21HexToInt(z[0])<<12)
+ (p21HexToInt(z[1])<<8)
+ (p21HexToInt(z[2])<<4)
+ p21HexToInt(z[3]);
return v;
}
/*
** Make the P21Node the return value of the function.
*/
static void p21Return(
P21Node *pNode, /* Node to return */
sqlite3_context *pCtx, /* Return value for this function */
sqlite3_value **aReplace /* Array of replacement values */
){
switch( pNode->eType ){
default: {
assert( pNode->eType==P21_EMPTY );
sqlite3_result_null(pCtx);
break;
}
case P21_DERIVED: {
assert(0);
}
case P21_ENUMERATION: {
assert(0);
}
case P21_BINARY: {
assert(0);
}
case P21_EID: {
sqlite3_result_text(pCtx, pNode->u.zJContent, pNode->n, SQLITE_TRANSIENT);
break;
}
case P21_INTEGER: {
sqlite3_int64 i = 0;
const char *z = pNode->u.zJContent;
if( z[0]=='-' ){ z++; }
while( z[0]>='0' && z[0]<='9' ){
unsigned v = *(z++) - '0';
if( i>=LARGEST_INT64/10 ){
if( i>LARGEST_INT64/10 ) goto int_as_real;
if( z[0]>='0' && z[0]<='9' ) goto int_as_real;
if( v==9 ) goto int_as_real;
if( v==8 ){
if( pNode->u.zJContent[0]=='-' ){
sqlite3_result_int64(pCtx, SMALLEST_INT64);
goto int_done;
}else{
goto int_as_real;
}
}
}
i = i*10 + v;
}
if( pNode->u.zJContent[0]=='-' ){ i = -i; }
sqlite3_result_int64(pCtx, i);
int_done:
break;
int_as_real: /* fall through to real */;
}
case P21_REAL: {
double r;
#ifdef SQLITE_AMALGAMATION
const char *z = pNode->u.zJContent;
sqlite3AtoF(z, &r, sqlite3Strlen30(z), SQLITE_UTF8);
#else
r = strtod(pNode->u.zJContent, 0);
#endif
sqlite3_result_double(pCtx, r);
break;
}
case P21_STRING: {
#if 0 /* Never happens because PNODE_RAW is only set by p21_set(),
** p21_insert() and p21_replace() and those routines do not
** call p21Return() */
if( pNode->jnFlags & PNODE_RAW ){
sqlite3_result_text(pCtx, pNode->u.zJContent, pNode->n,
SQLITE_TRANSIENT);
}else
#endif
assert( (pNode->jnFlags & PNODE_RAW)==0 );
if( (pNode->jnFlags & PNODE_ESCAPE)==0 ){
/* P21 formatted without any backslash-escapes */
sqlite3_result_text(pCtx, pNode->u.zJContent+1, pNode->n-2,
SQLITE_TRANSIENT);
}else{
/* Translate P21 formatted string into raw text */
u32 i;
u32 n = pNode->n;
const char *z = pNode->u.zJContent;
char *zOut;
u32 j;
/* TODO: */
assert(0);
zOut = sqlite3_malloc( n+1 );
if( zOut==0 ){
sqlite3_result_error_nomem(pCtx);
break;
}
for(i=1, j=0; i<n-1; i++){
char c = z[i];
if( c!='\\' ){
zOut[j++] = c;
}else{
c = z[++i];
if( c=='u' ){
u32 v = p21HexToInt4(z+i+1);
i += 4;
if( v==0 ) break;
if( v<=0x7f ){
zOut[j++] = (char)v;
}else if( v<=0x7ff ){
zOut[j++] = (char)(0xc0 | (v>>6));
zOut[j++] = 0x80 | (v&0x3f);
}else{
u32 vlo;
if( (v&0xfc00)==0xd800
&& i<n-6
&& z[i+1]=='\\'
&& z[i+2]=='u'
&& ((vlo = p21HexToInt4(z+i+3))&0xfc00)==0xdc00
){
/* We have a surrogate pair */
v = ((v&0x3ff)<<10) + (vlo&0x3ff) + 0x10000;
i += 6;
zOut[j++] = 0xf0 | (v>>18);
zOut[j++] = 0x80 | ((v>>12)&0x3f);
zOut[j++] = 0x80 | ((v>>6)&0x3f);
zOut[j++] = 0x80 | (v&0x3f);
}else{
zOut[j++] = 0xe0 | (v>>12);
zOut[j++] = 0x80 | ((v>>6)&0x3f);
zOut[j++] = 0x80 | (v&0x3f);
}
}
}else{
if( c=='b' ){
c = '\b';
}else if( c=='f' ){
c = '\f';
}else if( c=='n' ){
c = '\n';
}else if( c=='r' ){
c = '\r';
}else if( c=='t' ){
c = '\t';
}
zOut[j++] = c;
}
}
}
zOut[j] = 0;
sqlite3_result_text(pCtx, zOut, j, sqlite3_free);
}
break;
}
case P21_LIST:
case P21_RECORD: {
p21ReturnP21(pNode, pCtx, aReplace);
break;
}
}
}
/* Forward reference */
static int p21ParseAddNode(P21Parse*,u32,u32,const char*);
/*
** A macro to hint to the compiler that a function should not be
** inlined.
*/
#if defined(__GNUC__)
# define P21_NOINLINE __attribute__((noinline))
#elif defined(_MSC_VER) && _MSC_VER>=1310
# define P21_NOINLINE __declspec(noinline)
#else
# define P21_NOINLINE
#endif
static P21_NOINLINE int p21ParseAddNodeExpand(
P21Parse *pParse, /* Append the node to this object */
u32 eType, /* Node type */
u32 n, /* Content size or sub-node count */
const char *zContent /* Content */
){
u32 nNew;
P21Node *pNew;
assert( pParse->nNode>=pParse->nAlloc );
if( pParse->oom ) return -1;
nNew = pParse->nAlloc*2 + 10;
pNew = sqlite3_realloc64(pParse->aNode, sizeof(P21Node)*nNew);
if( pNew==0 ){
pParse->oom = 1;
return -1;
}
pParse->nAlloc = nNew;
pParse->aNode = pNew;
assert( pParse->nNode<pParse->nAlloc );
return p21ParseAddNode(pParse, eType, n, zContent);
}
/*
** Create a new P21Node instance based on the arguments and append that
** instance to the P21Parse. Return the index in pParse->aNode[] of the
** new node, or -1 if a memory allocation fails.
*/
static int p21ParseAddNode(
P21Parse *pParse, /* Append the node to this object */
u32 eType, /* Node type */
u32 n, /* Content size or sub-node count */
const char *zContent /* Content */
){
P21Node *p;
if( pParse->nNode>=pParse->nAlloc ){
return p21ParseAddNodeExpand(pParse, eType, n, zContent);
}
p = &pParse->aNode[pParse->nNode];
p->eType = (u8)eType;
p->jnFlags = 0;
p->n = n;
p->u.zJContent = zContent;
return pParse->nNode++;
}
/*
** Return true if z[] begins with 4 (or more) hexadecimal digits
*/
static int p21Is4Hex(const char *z){
int i;
for(i=0; i<4; i++) if( !safe_isxdigit(z[i]) ) return 0;
return 1;
}
/*
** Parse P21 value which begins at pParse->zP21[i]. Return the
** index of the first character past the end of the value parsed.
**
** Return negative for a syntax error.
*/
static int p21ParseValue(P21Parse *pParse, u32 i) {
static int cxtStack[P21_MAX_DEPTH];
const unsigned char *sp, *cur, *mrk, *tok, *end;
const unsigned char *yyt1;
int *piThis, x;
u32 n;
P21Node *pNode;
sp = cur = tok = &pParse->zP21[i];
piThis = cxtStack + pParse->iDepth;
#line 832 "p21sql.l"
start:
tok = cur;
#line 822 "p21sql.c"
{
unsigned char yych;
yych = *cur;
if (yych <= '\r') {
if (yych <= 0x0008) goto yy2;
if (yych <= '\n') goto yy3;
if (yych >= '\r') goto yy3;
} else {
if (yych <= ' ') {
if (yych >= ' ') goto yy3;
} else {
if (yych == '(') goto yy6;
}
}
yy2:
#line 850 "p21sql.l"
{
/* (simple_entity_instance) parameter_list */
*piThis = p21ParseAddNode(pParse, P21_RECORD, 0, 0);
if (*piThis < 0) return -1;
if( ++pParse->iDepth > P21_MAX_DEPTH ) return -1;
piThis = cxtStack + pParse->iDepth;
goto params1;
}
#line 848 "p21sql.c"
yy3:
yych = *++cur;
if (yych <= '\f') {
if (yych <= 0x0008) goto yy5;
if (yych <= '\n') goto yy3;
} else {
if (yych <= '\r') goto yy3;
if (yych == ' ') goto yy3;
}
yy5:
#line 838 "p21sql.l"
{
goto start;
}
#line 863 "p21sql.c"
yy6:
++cur;
#line 841 "p21sql.l"
{
/* (complex_entity_instance) parameter_list */
*piThis = p21ParseAddNode(pParse, P21_LIST, 0, 0);
if (*piThis < 0) return -1;
if( ++pParse->iDepth > P21_MAX_DEPTH ) return -1;
piThis = cxtStack + pParse->iDepth;
goto keywords;
}
#line 876 "p21sql.c"
}
#line 859 "p21sql.l"
keywords:
tok = cur;
#line 885 "p21sql.c"
{
unsigned char yych;
yych = *(mrk = cur);
if (yych <= '(') {
if (yych <= '\r') {
if (yych <= 0x0008) goto yy10;
if (yych <= '\n') goto yy11;
if (yych >= '\r') goto yy11;
} else {
if (yych <= 0x001F) goto yy10;
if (yych <= ' ') goto yy11;
if (yych <= '!') goto yy14;
}
} else {
if (yych <= '^') {
if (yych <= ')') goto yy16;
if (yych <= '@') goto yy10;
if (yych <= 'Z') goto yy18;
} else {
if (yych == '`') goto yy10;
if (yych <= 'z') goto yy18;
}
}
yy10:
#line 885 "p21sql.l"
{
/* fix-up and revert to P21_RECORD */
pNode = pParse->aNode + *(piThis - 1);
pNode->eType = P21_RECORD;
assert(pParse->iDepth == 1);
goto params1;
}
#line 918 "p21sql.c"
yy11:
yych = *++cur;
if (yych <= '\f') {
if (yych <= 0x0008) goto yy13;
if (yych <= '\n') goto yy11;
} else {
if (yych <= '\r') goto yy11;
if (yych == ' ') goto yy11;
}
yy13:
#line 865 "p21sql.l"
{
goto keywords;
}
#line 933 "p21sql.c"
yy14:
yych = *++cur;
if (yych <= '^') {
if (yych <= '@') goto yy15;
if (yych <= 'Z') goto yy18;
} else {
if (yych == '`') goto yy15;
if (yych <= 'z') goto yy18;
}
yy15:
cur = mrk;
goto yy10;
yy16:
++cur;
#line 877 "p21sql.l"
{
piThis = cxtStack + --pParse->iDepth;
pNode = pParse->aNode + *piThis;
assert(pNode->eType == P21_LIST);
pNode->n = pParse->nNode - (u32)*piThis - 1;
goto eol;
}
#line 957 "p21sql.c"
yy18:
yych = *++cur;
if (yych <= '(') {
if (yych <= '\r') {
if (yych <= 0x0008) goto yy15;
if (yych <= '\n') {
yyt1 = cur;
goto yy20;
}
if (yych <= '\f') goto yy15;
yyt1 = cur;
} else {
if (yych == ' ') {
yyt1 = cur;
goto yy20;
}
if (yych <= '\'') goto yy15;
yyt1 = cur;
goto yy22;
}
} else {
if (yych <= 'Z') {
if (yych <= '/') goto yy15;
if (yych <= '9') goto yy18;
if (yych <= '@') goto yy15;
goto yy18;
} else {
if (yych <= '_') {
if (yych <= '^') goto yy15;
goto yy18;
} else {
if (yych <= '`') goto yy15;
if (yych <= 'z') goto yy18;
goto yy15;
}
}
}
yy20:
yych = *++cur;
if (yych <= '\r') {
if (yych <= 0x0008) goto yy15;
if (yych <= '\n') goto yy20;
if (yych <= '\f') goto yy15;
goto yy20;