mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-08-18 09:43:23 +02:00
219 lines
5.0 KiB
Plaintext
219 lines
5.0 KiB
Plaintext
%{
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/* NdBox = [(lowerleft),(upperright)] */
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/* [(xLL(1)...xLL(N)),(xUR(1)...xUR(n))] */
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#define YYPARSE_PARAM result /* need this to pass a pointer (void *) to yyparse */
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#define YYSTYPE char *
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#define YYDEBUG 1
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#include "postgres.h"
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#include "cubedata.h"
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#undef yylex /* failure to redefine yylex will result in a call to the */
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#define yylex cube_yylex /* wrong scanner when running inside the postgres backend */
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extern int yylex(void); /* defined as cube_yylex in cubescan.l */
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static char *scanbuf;
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static int scanbuflen;
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void cube_yyerror(const char *message);
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int cube_yyparse(void *result);
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static int delim_count(char *s, char delim);
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static NDBOX * write_box(unsigned int dim, char *str1, char *str2);
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static NDBOX * write_point_as_box(char *s, int dim);
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%}
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/* BISON Declarations */
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%token CUBEFLOAT O_PAREN C_PAREN O_BRACKET C_BRACKET COMMA
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%start box
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/* Grammar follows */
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%%
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box:
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O_BRACKET paren_list COMMA paren_list C_BRACKET {
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int dim;
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dim = delim_count($2, ',') + 1;
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if ( (delim_count($4, ',') + 1) != dim ) {
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ereport(ERROR,
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(errcode(ERRCODE_SYNTAX_ERROR),
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errmsg("bad cube representation"),
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errdetail("different point dimensions in (%s) and (%s)",
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$2, $4)));
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YYABORT;
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}
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if (dim > CUBE_MAX_DIM) {
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ereport(ERROR,
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(errcode(ERRCODE_SYNTAX_ERROR),
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errmsg("bad cube representation"),
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errdetail("more than %d dimensions",
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CUBE_MAX_DIM)));
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YYABORT;
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}
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*((void **)result) = write_box( dim, $2, $4 );
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}
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paren_list COMMA paren_list {
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int dim;
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dim = delim_count($1, ',') + 1;
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if ( (delim_count($3, ',') + 1) != dim ) {
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ereport(ERROR,
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(errcode(ERRCODE_SYNTAX_ERROR),
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errmsg("bad cube representation"),
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errdetail("different point dimensions in (%s) and (%s)",
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$1, $3)));
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YYABORT;
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}
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if (dim > CUBE_MAX_DIM) {
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ereport(ERROR,
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(errcode(ERRCODE_SYNTAX_ERROR),
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errmsg("bad cube representation"),
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errdetail("more than %d dimensions",
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CUBE_MAX_DIM)));
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YYABORT;
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}
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*((void **)result) = write_box( dim, $1, $3 );
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}
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paren_list {
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int dim;
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dim = delim_count($1, ',') + 1;
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if (dim > CUBE_MAX_DIM) {
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ereport(ERROR,
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(errcode(ERRCODE_SYNTAX_ERROR),
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errmsg("bad cube representation"),
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errdetail("more than %d dimensions",
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CUBE_MAX_DIM)));
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YYABORT;
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}
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*((void **)result) = write_point_as_box($1, dim);
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}
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list {
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int dim;
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dim = delim_count($1, ',') + 1;
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if (dim > CUBE_MAX_DIM) {
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ereport(ERROR,
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(errcode(ERRCODE_SYNTAX_ERROR),
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errmsg("bad cube representation"),
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errdetail("more than %d dimensions",
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CUBE_MAX_DIM)));
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YYABORT;
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}
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*((void **)result) = write_point_as_box($1, dim);
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}
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;
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paren_list:
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O_PAREN list C_PAREN {
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$$ = $2;
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}
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;
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list:
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CUBEFLOAT {
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/* alloc enough space to be sure whole list will fit */
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$$ = palloc(scanbuflen + 1);
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strcpy($$, $1);
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}
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list COMMA CUBEFLOAT {
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$$ = $1;
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strcat($$, ",");
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strcat($$, $3);
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}
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;
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%%
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static int
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delim_count(char *s, char delim)
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{
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int ndelim = 0;
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while ((s = strchr(s, delim)) != NULL)
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{
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ndelim++;
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s++;
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}
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return (ndelim);
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}
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static NDBOX *
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write_box(unsigned int dim, char *str1, char *str2)
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{
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NDBOX * bp;
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char * s;
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int i;
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int size = offsetof(NDBOX, x[0]) + sizeof(double) * dim * 2;
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bp = palloc(size);
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memset(bp, 0, size);
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bp->size = size;
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bp->dim = dim;
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s = str1;
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bp->x[i=0] = strtod(s, NULL);
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while ((s = strchr(s, ',')) != NULL) {
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s++; i++;
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bp->x[i] = strtod(s, NULL);
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}
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s = str2;
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bp->x[i=dim] = strtod(s, NULL);
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while ((s = strchr(s, ',')) != NULL) {
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s++; i++;
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bp->x[i] = strtod(s, NULL);
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}
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return(bp);
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}
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static NDBOX * write_point_as_box(char *str, int dim)
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{
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NDBOX * bp;
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int i, size;
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double x;
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char * s = str;
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size = offsetof(NDBOX, x[0]) + sizeof(double) * dim * 2;
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bp = palloc(size);
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memset(bp, 0, size);
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bp->size = size;
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bp->dim = dim;
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i = 0;
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x = strtod(s, NULL);
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bp->x[0] = x;
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bp->x[dim] = x;
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while ((s = strchr(s, ',')) != NULL) {
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s++; i++;
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x = strtod(s, NULL);
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bp->x[i] = x;
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bp->x[i+dim] = x;
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}
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return(bp);
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}
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#include "cubescan.c"
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