static rasqal_literal*
rasqal_builtin_agg_expression_execute_result(void* user_data)
{
rasqal_builtin_agg_expression_execute* b;
b = (rasqal_builtin_agg_expression_execute*)user_data;
if(b->expr->op == RASQAL_EXPR_COUNT) {
rasqal_literal* result;
result = rasqal_new_integer_literal(b->world, RASQAL_LITERAL_INTEGER,
b->count);
return result;
}
if(b->expr->op == RASQAL_EXPR_GROUP_CONCAT) {
size_t len;
unsigned char* str;
rasqal_literal* result;
len = raptor_stringbuffer_length(b->sb);
str = (unsigned char*)RASQAL_MALLOC(cstring, len + 1);
if(!str)
return NULL;
if(raptor_stringbuffer_copy_to_string(b->sb, str, len)) {
RASQAL_FREE(cstring, str);
return NULL;
}
result = rasqal_new_string_literal(b->world, str, NULL, NULL, NULL);
return result;
}
if(b->expr->op == RASQAL_EXPR_AVG) {
rasqal_literal* count_l;
rasqal_literal* result;
count_l = rasqal_new_integer_literal(b->world, RASQAL_LITERAL_INTEGER,
b->count);
result = rasqal_literal_divide(b->l, count_l, &b->error);
rasqal_free_literal(count_l);
if(b->error) {
/* result will be NULL and error will be non-0 on division by 0
* in which case the result is literal(integer 0)
*/
result = rasqal_new_integer_literal(b->world, RASQAL_LITERAL_INTEGER,
0);
}
return result;
}
return rasqal_new_literal_from_literal(b->l);
}
/**
* rasqal_expression_evaluate2:
* @e: The expression to evaluate.
* @eval_context: expression context
* @error_p: pointer to error return flag
*
* Evaluate a #rasqal_expression tree in the context of a
* #rasqal_evaluation_context to give a #rasqal_literal result or error.
*
* Return value: a #rasqal_literal value or NULL (a valid value). @error_p is set to non-0 on failure.
**/
rasqal_literal*
rasqal_expression_evaluate2(rasqal_expression* e,
rasqal_evaluation_context* eval_context,
int *error_p)
{
rasqal_world *world;
int flags;
rasqal_literal* result = NULL;
rasqal_literal *l1;
rasqal_literal *l2;
/* pack vars from different switch cases in unions to save some stack space */
union {
struct { int e1; int e2; } errs;
struct { int dummy_do_not_mask_e; int free_literal; } flags;
int e;
} errs;
union {
struct { int b1; int b2; } bools;
int b;
int i;
raptor_uri *dt_uri;
const unsigned char *s;
unsigned char *new_s;
rasqal_variable *v;
rasqal_expression *e;
struct { void *dummy_do_not_mask; int found; } flags;
rasqal_xsd_datetime* dt;
struct timeval *tv;
raptor_stringbuffer* sb;
} vars;
RASQAL_ASSERT_OBJECT_POINTER_RETURN_VALUE(e, rasqal_expression, NULL);
RASQAL_ASSERT_OBJECT_POINTER_RETURN_VALUE(eval_context, rasqal_evaluation_context, NULL);
RASQAL_ASSERT_OBJECT_POINTER_RETURN_VALUE(error_p, intp, NULL);
world = eval_context->world;
flags = eval_context->flags;
errs.e = 0;
#ifdef RASQAL_DEBUG
RASQAL_DEBUG2("evaluating expression %p: ", e);
rasqal_expression_print(e, stderr);
fprintf(stderr, "\n");
#endif
switch(e->op) {
case RASQAL_EXPR_AND:
errs.errs.e1 = 0;
l1 = rasqal_expression_evaluate2(e->arg1, eval_context, &errs.errs.e1);
if(errs.errs.e1) {
vars.bools.b1 = 0;
} else {
vars.bools.b1 = rasqal_literal_as_boolean(l1, &errs.errs.e1);
rasqal_free_literal(l1);
}
errs.errs.e2 = 0;
l1 = rasqal_expression_evaluate2(e->arg2, eval_context, &errs.errs.e2);
if(errs.errs.e2) {
vars.bools.b2 = 0;
} else {
vars.bools.b2 = rasqal_literal_as_boolean(l1, &errs.errs.e2);
rasqal_free_literal(l1);
}
/* See http://www.w3.org/TR/2005/WD-rdf-sparql-query-20051123/#truthTable */
if(!errs.errs.e1 && !errs.errs.e2) {
/* No type error, answer is A && B */
vars.b = vars.bools.b1 && vars.bools.b2; /* don't need b1,b2 anymore */
} else {
if((!vars.bools.b1 && errs.errs.e2) || (errs.errs.e1 && vars.bools.b2))
/* F && E => F. E && F => F. */
vars.b = 0;
else
/* Otherwise E */
goto failed;
}
result = rasqal_new_boolean_literal(world, vars.b);
break;
case RASQAL_EXPR_OR:
errs.errs.e1 = 0;
l1 = rasqal_expression_evaluate2(e->arg1, eval_context, &errs.errs.e1);
if(errs.errs.e1) {
vars.bools.b1 = 0;
} else {
vars.bools.b1 = rasqal_literal_as_boolean(l1, &errs.errs.e1);
rasqal_free_literal(l1);
}
errs.errs.e2 = 0;
l1 = rasqal_expression_evaluate2(e->arg2, eval_context, &errs.errs.e2);
if(errs.errs.e2) {
vars.bools.b2 = 0;
} else {
vars.bools.b2 = rasqal_literal_as_boolean(l1, &errs.errs.e2);
rasqal_free_literal(l1);
}
/* See http://www.w3.org/TR/2005/WD-rdf-sparql-query-20051123/#truthTable */
if(!errs.errs.e1 && !errs.errs.e2) {
/* No type error, answer is A || B */
vars.b = vars.bools.b1 || vars.bools.b2; /* don't need b1,b2 anymore */
} else {
if((vars.bools.b1 && errs.errs.e2) || (errs.errs.e1 && vars.bools.b2))
/* T || E => T. E || T => T */
vars.b = 1;
else
/* Otherwise E */
goto failed;
}
result = rasqal_new_boolean_literal(world, vars.b);
break;
case RASQAL_EXPR_EQ:
l1 = rasqal_expression_evaluate2(e->arg1, eval_context, error_p);
if(*error_p || !l1)
goto failed;
l2 = rasqal_expression_evaluate2(e->arg2, eval_context, error_p);
if(*error_p || !l2) {
rasqal_free_literal(l1);
goto failed;
}
/* FIXME - this should probably be checked at literal creation
* time
*/
if(!rasqal_xsd_datatype_check(l1->type, l1->string, flags) ||
!rasqal_xsd_datatype_check(l2->type, l2->string, flags)) {
RASQAL_DEBUG1("One of the literals was invalid\n");
goto failed;
}
vars.b = (rasqal_literal_equals_flags(l1, l2, flags, &errs.e) != 0);
#if RASQAL_DEBUG > 1
if(errs.e)
RASQAL_DEBUG1("rasqal_literal_equals_flags returned: FAILURE\n");
else
RASQAL_DEBUG2("rasqal_literal_equals_flags returned: %d\n", vars.b);
#endif
rasqal_free_literal(l1);
rasqal_free_literal(l2);
if(errs.e)
goto failed;
result = rasqal_new_boolean_literal(world, vars.b);
break;
case RASQAL_EXPR_NEQ:
l1 = rasqal_expression_evaluate2(e->arg1, eval_context, error_p);
if(*error_p || !l1)
goto failed;
l2 = rasqal_expression_evaluate2(e->arg2, eval_context, error_p);
if(*error_p || !l2) {
rasqal_free_literal(l1);
goto failed;
}
vars.b = (rasqal_literal_not_equals_flags(l1, l2, flags, &errs.e) != 0);
#if RASQAL_DEBUG > 1
if(errs.e)
RASQAL_DEBUG1("rasqal_literal_not_equals_flags returned: FAILURE\n");
else
RASQAL_DEBUG2("rasqal_literal_not_equals_flags returned: %d\n", vars.b);
#endif
rasqal_free_literal(l1);
rasqal_free_literal(l2);
if(errs.e)
goto failed;
result = rasqal_new_boolean_literal(world, vars.b);
break;
case RASQAL_EXPR_LT:
l1 = rasqal_expression_evaluate2(e->arg1, eval_context, error_p);
if(*error_p || !l1)
goto failed;
l2 = rasqal_expression_evaluate2(e->arg2, eval_context, error_p);
if(*error_p || !l2) {
rasqal_free_literal(l1);
goto failed;
}
vars.b = (rasqal_literal_compare(l1, l2, flags, &errs.e) < 0);
rasqal_free_literal(l1);
rasqal_free_literal(l2);
if(errs.e)
goto failed;
result = rasqal_new_boolean_literal(world, vars.b);
break;
case RASQAL_EXPR_GT:
l1 = rasqal_expression_evaluate2(e->arg1, eval_context, error_p);
if(*error_p || !l1)
goto failed;
l2 = rasqal_expression_evaluate2(e->arg2, eval_context, error_p);
if(*error_p || !l2) {
rasqal_free_literal(l1);
goto failed;
}
vars.b = (rasqal_literal_compare(l1, l2, flags, &errs.e) > 0);
rasqal_free_literal(l1);
rasqal_free_literal(l2);
if(errs.e)
goto failed;
result = rasqal_new_boolean_literal(world, vars.b);
break;
case RASQAL_EXPR_LE:
l1 = rasqal_expression_evaluate2(e->arg1, eval_context, error_p);
if(*error_p || !l1)
goto failed;
l2 = rasqal_expression_evaluate2(e->arg2, eval_context, error_p);
if(*error_p || !l2) {
rasqal_free_literal(l1);
goto failed;
}
vars.b = (rasqal_literal_compare(l1, l2, flags, &errs.e) <= 0);
rasqal_free_literal(l1);
rasqal_free_literal(l2);
if(errs.e)
goto failed;
result = rasqal_new_boolean_literal(world, vars.b);
break;
case RASQAL_EXPR_GE:
l1 = rasqal_expression_evaluate2(e->arg1, eval_context, error_p);
if(*error_p || !l1)
goto failed;
l2 = rasqal_expression_evaluate2(e->arg2, eval_context, error_p);
if(*error_p || !l2) {
rasqal_free_literal(l1);
goto failed;
}
vars.b = (rasqal_literal_compare(l1, l2, flags, &errs.e) >= 0);
rasqal_free_literal(l1);
rasqal_free_literal(l2);
if(errs.e)
goto failed;
result = rasqal_new_boolean_literal(world, vars.b);
break;
case RASQAL_EXPR_UMINUS:
l1 = rasqal_expression_evaluate2(e->arg1, eval_context, error_p);
if(*error_p || !l1)
goto failed;
result = rasqal_literal_negate(l1, &errs.e);
rasqal_free_literal(l1);
if(errs.e)
goto failed;
break;
case RASQAL_EXPR_BOUND:
result = rasqal_expression_evaluate_bound(e, eval_context, error_p);
break;
case RASQAL_EXPR_STR:
result = rasqal_expression_evaluate_str(e, eval_context, error_p);
break;
case RASQAL_EXPR_LANG:
result = rasqal_expression_evaluate_lang(e, eval_context, error_p);
break;
case RASQAL_EXPR_LANGMATCHES:
result = rasqal_expression_evaluate_langmatches(e, eval_context, error_p);
break;
case RASQAL_EXPR_DATATYPE:
result = rasqal_expression_evaluate_datatype(e, eval_context, error_p);
break;
case RASQAL_EXPR_ISURI:
case RASQAL_EXPR_ISBLANK:
case RASQAL_EXPR_ISLITERAL:
case RASQAL_EXPR_ISNUMERIC:
result = rasqal_expression_evaluate_istype(e, eval_context, error_p);
break;
case RASQAL_EXPR_PLUS:
l1 = rasqal_expression_evaluate2(e->arg1, eval_context, error_p);
if(*error_p || !l1)
goto failed;
l2 = rasqal_expression_evaluate2(e->arg2, eval_context, error_p);
if(*error_p || !l2) {
rasqal_free_literal(l1);
goto failed;
}
result = rasqal_literal_add(l1, l2, &errs.e);
rasqal_free_literal(l1);
rasqal_free_literal(l2);
if(errs.e)
goto failed;
break;
case RASQAL_EXPR_MINUS:
l1 = rasqal_expression_evaluate2(e->arg1, eval_context, error_p);
if(*error_p || !l1)
goto failed;
l2 = rasqal_expression_evaluate2(e->arg2, eval_context, error_p);
if(*error_p || !l2) {
rasqal_free_literal(l1);
goto failed;
}
result = rasqal_literal_subtract(l1, l2, &errs.e);
rasqal_free_literal(l1);
rasqal_free_literal(l2);
if(errs.e)
goto failed;
break;
case RASQAL_EXPR_STAR:
l1 = rasqal_expression_evaluate2(e->arg1, eval_context, error_p);
if(*error_p || !l1)
goto failed;
l2 = rasqal_expression_evaluate2(e->arg2, eval_context, error_p);
if(*error_p || !l2) {
rasqal_free_literal(l1);
goto failed;
}
result = rasqal_literal_multiply(l1, l2, &errs.e);
rasqal_free_literal(l1);
rasqal_free_literal(l2);
if(errs.e)
goto failed;
break;
case RASQAL_EXPR_SLASH:
l1 = rasqal_expression_evaluate2(e->arg1, eval_context, error_p);
if(*error_p || !l1)
goto failed;
l2 = rasqal_expression_evaluate2(e->arg2, eval_context, error_p);
if(*error_p || !l2) {
rasqal_free_literal(l1);
goto failed;
}
result = rasqal_literal_divide(l1, l2, &errs.e);
rasqal_free_literal(l1);
rasqal_free_literal(l2);
if(errs.e)
goto failed;
break;
case RASQAL_EXPR_REM:
l1 = rasqal_expression_evaluate2(e->arg1, eval_context, error_p);
if(*error_p || !l1)
goto failed;
l2 = rasqal_expression_evaluate2(e->arg2, eval_context, error_p);
if(*error_p || !l2) {
rasqal_free_literal(l1);
goto failed;
}
vars.i = rasqal_literal_as_integer(l2, &errs.errs.e2);
/* error if divisor is zero */
if(!vars.i)
errs.errs.e2 = 1;
else
vars.i = rasqal_literal_as_integer(l1, &errs.errs.e1) % vars.i;
rasqal_free_literal(l1);
rasqal_free_literal(l2);
if(errs.errs.e1 || errs.errs.e2)
goto failed;
result = rasqal_new_integer_literal(world, RASQAL_LITERAL_INTEGER, vars.i);
break;
case RASQAL_EXPR_STR_EQ:
l1 = rasqal_expression_evaluate2(e->arg1, eval_context, error_p);
if(*error_p || !l1)
goto failed;
l2 = rasqal_expression_evaluate2(e->arg2, eval_context, error_p);
if(*error_p || !l2) {
rasqal_free_literal(l1);
goto failed;
}
vars.b = (rasqal_literal_compare(l1, l2, flags | RASQAL_COMPARE_NOCASE,
&errs.e) == 0);
rasqal_free_literal(l1);
rasqal_free_literal(l2);
if(errs.e)
goto failed;
result = rasqal_new_boolean_literal(world, vars.b);
break;
case RASQAL_EXPR_STR_NEQ:
l1 = rasqal_expression_evaluate2(e->arg1, eval_context, error_p);
if(*error_p || !l1)
goto failed;
l2 = rasqal_expression_evaluate2(e->arg2, eval_context, error_p);
if(*error_p || !l2) {
rasqal_free_literal(l1);
goto failed;
}
vars.b = (rasqal_literal_compare(l1, l2, flags | RASQAL_COMPARE_NOCASE,
&errs.e) != 0);
rasqal_free_literal(l1);
rasqal_free_literal(l2);
if(errs.e)
goto failed;
result = rasqal_new_boolean_literal(world, vars.b);
break;
case RASQAL_EXPR_TILDE:
l1 = rasqal_expression_evaluate2(e->arg1, eval_context, error_p);
if(*error_p || !l1)
goto failed;
vars.i= ~ rasqal_literal_as_integer(l1, &errs.e);
rasqal_free_literal(l1);
if(errs.e)
goto failed;
result = rasqal_new_integer_literal(world, RASQAL_LITERAL_INTEGER, vars.i);
break;
case RASQAL_EXPR_BANG:
l1 = rasqal_expression_evaluate2(e->arg1, eval_context, error_p);
if(*error_p || !l1)
goto failed;
vars.b = ! rasqal_literal_as_boolean(l1, &errs.e);
rasqal_free_literal(l1);
if(errs.e)
goto failed;
result = rasqal_new_boolean_literal(world, vars.b);
break;
case RASQAL_EXPR_STR_MATCH:
case RASQAL_EXPR_STR_NMATCH:
case RASQAL_EXPR_REGEX:
result = rasqal_expression_evaluate_strmatch(e, eval_context, error_p);
break;
case RASQAL_EXPR_LITERAL:
/* flatten any literal to a value as soon as possible - this
* removes variables from expressions the first time they are seen.
* (FLATTEN_LITERAL)
*/
result = rasqal_new_literal_from_literal(rasqal_literal_value(e->literal));
break;
case RASQAL_EXPR_FUNCTION:
rasqal_log_warning_simple(world, RASQAL_WARNING_LEVEL_NOT_IMPLEMENTED,
eval_context->locator,
"No function expressions support at present. Returning false.");
result = rasqal_new_boolean_literal(world, 0);
break;
case RASQAL_EXPR_CAST:
l1 = rasqal_expression_evaluate2(e->arg1, eval_context, error_p);
if(*error_p || !l1)
goto failed;
result = rasqal_literal_cast(l1, e->name, flags, &errs.e);
rasqal_free_literal(l1);
if(errs.e)
goto failed;
break;
case RASQAL_EXPR_ORDER_COND_ASC:
case RASQAL_EXPR_ORDER_COND_DESC:
case RASQAL_EXPR_GROUP_COND_ASC:
case RASQAL_EXPR_GROUP_COND_DESC:
result = rasqal_expression_evaluate2(e->arg1, eval_context, error_p);
break;
case RASQAL_EXPR_COUNT:
case RASQAL_EXPR_SUM:
case RASQAL_EXPR_AVG:
case RASQAL_EXPR_MIN:
case RASQAL_EXPR_MAX:
case RASQAL_EXPR_SAMPLE:
case RASQAL_EXPR_GROUP_CONCAT:
rasqal_log_error_simple(world, RAPTOR_LOG_LEVEL_ERROR,
eval_context->locator,
"Aggregate expressions cannot be evaluated in a general scalar expression.");
errs.e = 1;
goto failed;
break;
case RASQAL_EXPR_VARSTAR:
/* constants */
break;
case RASQAL_EXPR_SAMETERM:
result = rasqal_expression_evaluate_sameterm(e, eval_context, error_p);
break;
case RASQAL_EXPR_CONCAT:
result = rasqal_expression_evaluate_concat(e, eval_context, error_p);
break;
case RASQAL_EXPR_COALESCE:
result = rasqal_expression_evaluate_coalesce(e, eval_context, error_p);
break;
case RASQAL_EXPR_IF:
result = rasqal_expression_evaluate_if(e, eval_context, error_p);
break;
case RASQAL_EXPR_URI:
case RASQAL_EXPR_IRI:
result = rasqal_expression_evaluate_uri_constructor(e, eval_context, error_p);
break;
case RASQAL_EXPR_STRLANG:
result = rasqal_expression_evaluate_strlang(e, eval_context, error_p);
break;
case RASQAL_EXPR_STRDT:
result = rasqal_expression_evaluate_strdt(e, eval_context, error_p);
break;
case RASQAL_EXPR_BNODE:
result = rasqal_expression_evaluate_bnode_constructor(e, eval_context, error_p);
break;
case RASQAL_EXPR_IN:
result = rasqal_expression_evaluate_in_set(e, eval_context, error_p);
break;
case RASQAL_EXPR_NOT_IN:
result = rasqal_expression_evaluate_in_set(e, eval_context, error_p);
break;
case RASQAL_EXPR_YEAR:
case RASQAL_EXPR_MONTH:
case RASQAL_EXPR_DAY:
case RASQAL_EXPR_HOURS:
case RASQAL_EXPR_MINUTES:
case RASQAL_EXPR_SECONDS:
result = rasqal_expression_evaluate_datetime_part(e, eval_context, error_p);
break;
case RASQAL_EXPR_CURRENT_DATETIME:
case RASQAL_EXPR_NOW:
result = rasqal_expression_evaluate_now(e, eval_context, error_p);
break;
case RASQAL_EXPR_TO_UNIXTIME:
result = rasqal_expression_evaluate_to_unixtime(e, eval_context, error_p);
break;
case RASQAL_EXPR_FROM_UNIXTIME:
result = rasqal_expression_evaluate_from_unixtime(e, eval_context, error_p);
break;
case RASQAL_EXPR_RAND:
result = rasqal_expression_evaluate_rand(e, eval_context, error_p);
break;
case RASQAL_EXPR_STRLEN:
result = rasqal_expression_evaluate_strlen(e, eval_context, error_p);
break;
case RASQAL_EXPR_UCASE:
case RASQAL_EXPR_LCASE:
result = rasqal_expression_evaluate_set_case(e, eval_context, error_p);
break;
case RASQAL_EXPR_STRSTARTS:
case RASQAL_EXPR_STRENDS:
case RASQAL_EXPR_CONTAINS:
result = rasqal_expression_evaluate_str_prefix_suffix(e, eval_context, error_p);
break;
case RASQAL_EXPR_TIMEZONE:
result = rasqal_expression_evaluate_datetime_timezone(e, eval_context, error_p);
break;
case RASQAL_EXPR_TZ:
result = rasqal_expression_evaluate_datetime_tz(e, eval_context, error_p);
break;
case RASQAL_EXPR_ENCODE_FOR_URI:
result = rasqal_expression_evaluate_encode_for_uri(e, eval_context, error_p);
break;
case RASQAL_EXPR_SUBSTR:
result = rasqal_expression_evaluate_substr(e, eval_context, error_p);
break;
case RASQAL_EXPR_ABS:
result = rasqal_expression_evaluate_abs(e, eval_context, error_p);
break;
case RASQAL_EXPR_ROUND:
result = rasqal_expression_evaluate_round(e, eval_context, error_p);
break;
case RASQAL_EXPR_CEIL:
result = rasqal_expression_evaluate_ceil(e, eval_context, error_p);
break;
case RASQAL_EXPR_FLOOR:
result = rasqal_expression_evaluate_floor(e, eval_context, error_p);
break;
case RASQAL_EXPR_MD5:
case RASQAL_EXPR_SHA1:
case RASQAL_EXPR_SHA224:
case RASQAL_EXPR_SHA256:
case RASQAL_EXPR_SHA384:
case RASQAL_EXPR_SHA512:
result = rasqal_expression_evaluate_digest(e, eval_context, error_p);
break;
case RASQAL_EXPR_UNKNOWN:
default:
RASQAL_FATAL3("Unknown operation %s (%d)",
rasqal_expression_op_label(e->op), e->op);
}
got_result:
#ifdef RASQAL_DEBUG
RASQAL_DEBUG2("result of %p: ", e);
rasqal_expression_print(e, stderr);
fputs( ": ", stderr);
if(*error_p)
fputs("FAILURE",stderr);
else
rasqal_literal_print(result, stderr);
fputc('\n', stderr);
#endif
return result;
failed:
*error_p = 1;
if(result) {
rasqal_free_literal(result);
result = NULL;
}
goto got_result;
}
/**
* rasqal_new_row_sequence:
* @world: world object ot use
* @vt: variables table to use to declare variables
* @row_data: row data
* @vars_count: number of variables in row
* @vars_seq_p: OUT parameter - pointer to place to store sequence of variables (or NULL)
*
* INTERNAL - Make a sequence of #rasqal_row* objects
* with variables defined into the @vt table and values in the sequence
*
* The @row_data parameter is an array of strings forming a table of
* width (vars_count * 2).
* The first row is a list of variable names at offset 0.
* The remaining rows are values where offset 0 is a literal and
* offset 1 is a URI string.
*
* The last row is indicated by an entire row of NULLs.
*
* Return value: sequence of rows or NULL on failure
*/
raptor_sequence*
rasqal_new_row_sequence(rasqal_world* world,
rasqal_variables_table* vt,
const char* const row_data[],
int vars_count,
raptor_sequence** vars_seq_p)
{
raptor_sequence *seq = NULL;
raptor_sequence *vars_seq = NULL;
int row_i;
int column_i;
int failed = 0;
#define GET_CELL(row, column, offset) \
row_data[((((row)*vars_count)+(column))<<1)+(offset)]
seq = raptor_new_sequence((raptor_data_free_handler)rasqal_free_row,
(raptor_data_print_handler)rasqal_row_print);
if(!seq)
return NULL;
if(vars_seq_p) {
vars_seq = raptor_new_sequence((raptor_data_free_handler)rasqal_free_variable,
(raptor_data_print_handler)rasqal_variable_print);
if(!vars_seq) {
raptor_free_sequence(seq);
return NULL;
}
}
/* row 0 is variables */
row_i = 0;
for(column_i = 0; column_i < vars_count; column_i++) {
const char * var_name = GET_CELL(row_i, column_i, 0);
size_t var_name_len = strlen(var_name);
const unsigned char* name;
rasqal_variable* v;
name = (unsigned char*)RASQAL_MALLOC(cstring, var_name_len+1);
if(!name) {
failed = 1;
goto tidy;
}
memcpy((void*)name, var_name, var_name_len + 1);
v = rasqal_variables_table_add(vt, RASQAL_VARIABLE_TYPE_NORMAL, name, NULL);
if(!v) {
failed = 1;
goto tidy;
}
if(vars_seq) {
v = rasqal_new_variable_from_variable(v);
raptor_sequence_push(vars_seq, v);
}
}
for(row_i = 1; 1; row_i++) {
rasqal_row* row;
int data_values_seen = 0;
/* Terminate on an entire row of NULLs */
for(column_i = 0; column_i < vars_count; column_i++) {
if(GET_CELL(row_i, column_i, 0) || GET_CELL(row_i, column_i, 1)) {
data_values_seen++;
break;
}
}
if(!data_values_seen)
break;
row = rasqal_new_row_for_size(world, vars_count);
if(!row) {
raptor_free_sequence(seq); seq = NULL;
goto tidy;
}
for(column_i = 0; column_i < vars_count; column_i++) {
rasqal_literal* l = NULL;
if(GET_CELL(row_i, column_i, 0)) {
/* string literal */
const char* str = GET_CELL(row_i, column_i, 0);
size_t str_len = strlen(str);
char *eptr = NULL;
int integer;
integer = (int)strtol((const char*)str, &eptr, 10);
if(!*eptr) {
/* is an integer */
l = rasqal_new_integer_literal(world, RASQAL_LITERAL_INTEGER,
integer);
} else {
unsigned char *val;
val = (unsigned char*)RASQAL_MALLOC(cstring, str_len+1);
if(val) {
memcpy(val, str, str_len + 1);
l = rasqal_new_string_literal_node(world, val, NULL, NULL);
} else
failed = 1;
}
} else if(GET_CELL(row_i, column_i, 1)) {
/* URI */
const unsigned char* str;
raptor_uri* u;
str = (const unsigned char*)GET_CELL(row_i, column_i, 1);
u = raptor_new_uri(world->raptor_world_ptr, str);
if(u)
l = rasqal_new_uri_literal(world, u);
else
failed = 1;
} else {
/* variable is not defined for this row */
continue;
}
if(!l) {
rasqal_free_row(row);
failed = 1;
goto tidy;
}
rasqal_row_set_value_at(row, column_i, l);
/* free our copy of literal, rasqal_row has a reference */
rasqal_free_literal(l);
}
raptor_sequence_push(seq, row);
}
tidy:
if(failed) {
if(seq) {
raptor_free_sequence(seq);
seq = NULL;
}
if(vars_seq) {
raptor_free_sequence(vars_seq);
vars_seq = NULL;
}
} else {
if(vars_seq) {
if(vars_seq_p)
*vars_seq_p = vars_seq;
else
raptor_free_sequence(vars_seq);
}
}
return seq;
}
