120 lines
2.2 KiB
Plaintext
120 lines
2.2 KiB
Plaintext
%token_prefix TK_
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%token_type {buffer *}
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%extra_argument {ssi_ctx_t *ctx}
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%name ssiexprparser
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%include {
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#include <assert.h>
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#include <string.h>
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#include "config.h"
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#include "mod_ssi_expr.h"
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#include "buffer.h"
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}
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%parse_failure {
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ctx->ok = 0;
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}
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%type expr { ssi_val_t * }
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%type value { buffer * }
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%type exprline { ssi_val_t * }
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%type cond { int }
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%token_destructor { buffer_free($$); }
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%left AND.
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%left OR.
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%nonassoc EQ NE GT GE LT LE.
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%right NOT.
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input ::= exprline(B). {
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ctx->val.bo = ssi_val_tobool(B);
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ctx->val.type = SSI_TYPE_BOOL;
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ssi_val_free(B);
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}
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exprline(A) ::= expr(B) cond(C) expr(D). {
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int cmp;
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if (B->type == SSI_TYPE_STRING &&
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D->type == SSI_TYPE_STRING) {
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cmp = strcmp(B->str->ptr, D->str->ptr);
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} else {
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cmp = ssi_val_tobool(B) - ssi_val_tobool(D);
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}
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A = B;
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switch(C) {
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case SSI_COND_EQ: A->bo = (cmp == 0) ? 1 : 0; break;
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case SSI_COND_NE: A->bo = (cmp != 0) ? 1 : 0; break;
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case SSI_COND_GE: A->bo = (cmp >= 0) ? 1 : 0; break;
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case SSI_COND_GT: A->bo = (cmp > 0) ? 1 : 0; break;
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case SSI_COND_LE: A->bo = (cmp <= 0) ? 1 : 0; break;
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case SSI_COND_LT: A->bo = (cmp < 0) ? 1 : 0; break;
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}
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A->type = SSI_TYPE_BOOL;
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ssi_val_free(D);
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}
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exprline(A) ::= expr(B). {
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A = B;
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}
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expr(A) ::= expr(B) AND expr(C). {
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int e;
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e = ssi_val_tobool(B) && ssi_val_tobool(C);
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A = B;
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A->bo = e;
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A->type = SSI_TYPE_BOOL;
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ssi_val_free(C);
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}
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expr(A) ::= expr(B) OR expr(C). {
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int e;
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e = ssi_val_tobool(B) || ssi_val_tobool(C);
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A = B;
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A->bo = e;
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A->type = SSI_TYPE_BOOL;
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ssi_val_free(C);
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}
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expr(A) ::= NOT expr(B). {
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int e;
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e = !ssi_val_tobool(B);
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A = B;
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A->bo = e;
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A->type = SSI_TYPE_BOOL;
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}
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expr(A) ::= LPARAN exprline(B) RPARAN. {
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A = B;
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}
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expr(A) ::= value(B). {
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A = ssi_val_init();
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A->str = B;
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A->type = SSI_TYPE_STRING;
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}
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value(A) ::= VALUE(B). {
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A = buffer_init_string(B->ptr);
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}
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value(A) ::= value(B) VALUE(C). {
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A = B;
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buffer_append_string_buffer(A, C);
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}
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cond(A) ::= EQ. { A = SSI_COND_EQ; }
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cond(A) ::= NE. { A = SSI_COND_NE; }
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cond(A) ::= LE. { A = SSI_COND_LE; }
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cond(A) ::= GE. { A = SSI_COND_GE; }
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cond(A) ::= LT. { A = SSI_COND_LT; }
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cond(A) ::= GT. { A = SSI_COND_GT; }
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