mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-12-21 08:29:39 +08:00
785941cdc3
This improves on commit bbfd7edae5 by
making two simple changes:
* pg_attribute_noreturn now takes parentheses, ie pg_attribute_noreturn().
Likewise pg_attribute_unused(), pg_attribute_packed(). This reduces
pgindent's tendency to misformat declarations involving them.
* attributes are now always attached to function declarations, not
definitions. Previously some places were taking creative shortcuts,
which were not merely candidates for bad misformatting by pgindent
but often were outright wrong anyway. (It does little good to put a
noreturn annotation where callers can't see it.) In any case, if
we would like to believe that these macros can be used with non-gcc
compilers, we should avoid gratuitous variance in usage patterns.
I also went through and manually improved the formatting of a lot of
declarations, and got rid of excessively repetitive (and now obsolete
anyway) comments informing the reader what pg_attribute_printf is for.
164 lines
3.2 KiB
Plaintext
164 lines
3.2 KiB
Plaintext
%{
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/* contrib/seg/segparse.y */
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#include "postgres.h"
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#include <math.h>
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#include "fmgr.h"
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#include "utils/builtins.h"
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#include "segdata.h"
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/*
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* Bison doesn't allocate anything that needs to live across parser calls,
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* so we can easily have it use palloc instead of malloc. This prevents
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* memory leaks if we error out during parsing. Note this only works with
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* bison >= 2.0. However, in bison 1.875 the default is to use alloca()
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* if possible, so there's not really much problem anyhow, at least if
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* you're building with gcc.
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*/
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#define YYMALLOC palloc
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#define YYFREE pfree
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static float seg_atof(char *value);
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static char strbuf[25] = {
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'0', '0', '0', '0', '0',
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'0', '0', '0', '0', '0',
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'0', '0', '0', '0', '0',
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'0', '0', '0', '0', '0',
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'0', '0', '0', '0', '\0'
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};
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%}
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/* BISON Declarations */
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%parse-param {SEG *result}
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%expect 0
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%name-prefix="seg_yy"
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%union {
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struct BND {
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float val;
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char ext;
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char sigd;
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} bnd;
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char * text;
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}
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%token <text> SEGFLOAT
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%token <text> RANGE
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%token <text> PLUMIN
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%token <text> EXTENSION
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%type <bnd> boundary
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%type <bnd> deviation
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%start range
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/* Grammar follows */
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%%
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range: boundary PLUMIN deviation
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{
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result->lower = $1.val - $3.val;
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result->upper = $1.val + $3.val;
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sprintf(strbuf, "%g", result->lower);
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result->l_sigd = Max(Min(6, significant_digits(strbuf)), Max($1.sigd, $3.sigd));
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sprintf(strbuf, "%g", result->upper);
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result->u_sigd = Max(Min(6, significant_digits(strbuf)), Max($1.sigd, $3.sigd));
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result->l_ext = '\0';
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result->u_ext = '\0';
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}
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| boundary RANGE boundary
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{
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result->lower = $1.val;
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result->upper = $3.val;
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if ( result->lower > result->upper ) {
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
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errmsg("swapped boundaries: %g is greater than %g",
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result->lower, result->upper)));
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YYERROR;
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}
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result->l_sigd = $1.sigd;
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result->u_sigd = $3.sigd;
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result->l_ext = ( $1.ext ? $1.ext : '\0' );
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result->u_ext = ( $3.ext ? $3.ext : '\0' );
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}
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| boundary RANGE
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{
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result->lower = $1.val;
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result->upper = HUGE_VAL;
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result->l_sigd = $1.sigd;
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result->u_sigd = 0;
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result->l_ext = ( $1.ext ? $1.ext : '\0' );
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result->u_ext = '-';
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}
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| RANGE boundary
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{
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result->lower = -HUGE_VAL;
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result->upper = $2.val;
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result->l_sigd = 0;
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result->u_sigd = $2.sigd;
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result->l_ext = '-';
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result->u_ext = ( $2.ext ? $2.ext : '\0' );
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}
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| boundary
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{
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result->lower = result->upper = $1.val;
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result->l_sigd = result->u_sigd = $1.sigd;
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result->l_ext = result->u_ext = ( $1.ext ? $1.ext : '\0' );
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}
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;
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boundary: SEGFLOAT
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{
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/* temp variable avoids a gcc 3.3.x bug on Sparc64 */
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float val = seg_atof($1);
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$$.ext = '\0';
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$$.sigd = significant_digits($1);
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$$.val = val;
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}
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| EXTENSION SEGFLOAT
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{
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/* temp variable avoids a gcc 3.3.x bug on Sparc64 */
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float val = seg_atof($2);
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$$.ext = $1[0];
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$$.sigd = significant_digits($2);
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$$.val = val;
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}
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;
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deviation: SEGFLOAT
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{
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/* temp variable avoids a gcc 3.3.x bug on Sparc64 */
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float val = seg_atof($1);
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$$.ext = '\0';
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$$.sigd = significant_digits($1);
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$$.val = val;
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}
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;
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%%
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static float
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seg_atof(char *value)
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{
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Datum datum;
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datum = DirectFunctionCall1(float4in, CStringGetDatum(value));
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return DatumGetFloat4(datum);
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}
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#include "segscan.c"
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