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|
%define api.pure full
%define api.prefix {kalmia}
%locations
%define parse.error verbose
%param { yyscan_t scanner }
%code top {
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
}
%code requires {
typedef void* yyscan_t;
struct kalmia_t {
void *current;
int index;
};
struct ka_float_array_t {
char *id;
size_t count;
double *buf;
};
}
%parse-param { struct kalmia_t *result }
%code {
int yylex(YYSTYPE *yylvalp, YYLTYPE *yyllocp, yyscan_t scanner);
int yyerror(YYLTYPE *yyllocp, yyscan_t unused, struct kalmia_t *unused2, const char *msg);
#define KAI_ABORT -1
#define KAI_NOMEM -2
#define KAI_ABORTF(...) \
do { \
kai_abortf_(&yylloc, __VA_ARGS__); \
YYABORT; \
} while(0)
void kai_abortf_(YYLTYPE *yyllocp, const char *fmt, ...);
/* float arrays */
int kai_set_float_array_attrs(struct ka_float_array_t *a, char *id, char *count);
#define KAI_WRAP(call) \
do { \
int err = call; \
if (err == KAI_ABORT) { \
KAI_ABORTF("call returned error: %s", #call); \
} \
else if (err == KAI_NOMEM) { \
KAI_ABORTF("call ran out of memory: %s", #call); \
} \
} while(0)
}
%union {
long lval;
double dval;
char *sval;
char cval;
struct ka_float_array_t float_array;
}
%token PROLOG
%token S_TAG_OPEN E_TAG_OPEN TAG_CLOSE EMPTY_TAG_CLOSE
%token <sval> NAME
%token <sval> ATTR
%token <sval> TEXT
%token <lval> INTEGER
%token <dval> DOUBLE
%token DATE;
%token <float_array> FLOAT_ARRAY
%type <float_array> float_array
%type <float_array> float_array_start
%type <float_array> float_array_attributes
%token ID_ATTR COUNT_ATTR
%type <sval> attr
%%
document: PROLOG element;
elements:
element
| elements element
;
element:
empty_tag
| start_tag end_tag
| start_tag content end_tag
| float_array
;
content:
elements
| integers
| doubles
| DATE
;
empty_tag:
S_TAG_OPEN NAME attributes EMPTY_TAG_CLOSE { printf("empty tag: %s\n", $2); }
;
start_tag:
S_TAG_OPEN NAME attributes TAG_CLOSE
{
printf("enter tag: %s\n", $2);
result->current = NULL;
}
;
end_tag:
E_TAG_OPEN NAME TAG_CLOSE { printf("exit tag: %s\n", $2); }
;
attributes:
| attribute
| attributes attribute
;
attribute:
ATTR attr { printf("attribute: %s=%s\n", $1, $2); }
| ID_ATTR attr
| COUNT_ATTR attr
;
float_array:
float_array_start doubles float_array_close
{
$$ = $1;
printf("float_array[id='%s', count=%lu]{ ", $$.id, $$.count);
for (size_t i=0; i<$$.count; i++) {
printf("%f, ", $$.buf[i]);
}
printf("}\n");
}
;
float_array_start:
S_TAG_OPEN FLOAT_ARRAY float_array_attributes TAG_CLOSE
{
$$ = $3;
result->current = $$.buf;
result->index = 0;
}
;
float_array_close:
E_TAG_OPEN FLOAT_ARRAY TAG_CLOSE
;
float_array_attributes:
COUNT_ATTR attr
{ KAI_WRAP(kai_set_float_array_attrs(&$$, NULL, $2)); }
| COUNT_ATTR attr ID_ATTR attr
{ KAI_WRAP(kai_set_float_array_attrs(&$$, $4, $2)); }
| ID_ATTR attr COUNT_ATTR attr
{ KAI_WRAP(kai_set_float_array_attrs(&$$, $2, $4)); }
;
attr:
'=' '"' TEXT '"' { $$ = $3; }
;
integers:
INTEGER { printf("%ld\n", $1); }
| integers INTEGER { printf("%ld\n", $2); }
;
doubles:
DOUBLE
{
if (result->current != NULL) {
((double*) result->current)[result->index] = $1;
result->index += 1;
}
}
| doubles DOUBLE
{
if (result->current != NULL) {
((double*) result->current)[result->index] = $2;
result->index += 1;
}
}
;
%%
int yyerror(
YYLTYPE *yyllocp,
yyscan_t unused,
struct kalmia_t *unused2,
const char *msg)
{
fprintf(
stderr, "[%d:%d]: %s\n",
yyllocp->first_line, yyllocp->first_column, msg
);
return 1;
}
void kai_abortf_(YYLTYPE *yyllocp, const char *fmt, ...)
{
va_list args, args_len;
va_start(args, fmt);
va_copy(args_len, args);
size_t len = vsnprintf(NULL, 0, fmt, args_len) + 1;
va_end(args_len);
char *buf = malloc(sizeof(char) * len);
if (buf == NULL) {
fprintf(stderr, "failed to allocate buffer for error message!\n");
return;
}
vsnprintf(buf, len, fmt, args);
va_end(args);
yyerror(yyllocp, NULL, NULL, buf);
}
/* float arrays */
int kai_set_float_array_attrs(
struct ka_float_array_t *a, char *id, char *count)
{
a->id = id;
char *end = NULL;
a->count = strtoll(count, &end, 10);
if (end == count) {
return -1;
}
a->buf = malloc(sizeof(double) * a->count);
if (a->buf == NULL) {
return -2;
}
return 0;
}
|
