static int
exec_plus(strm_stream* strm, int argc, strm_value* args, strm_value* ret)
{
assert(argc == 2);
if (strm_string_p(*args)) {
strm_string str1 = strm_value_str(args[0]);
strm_string str2 = strm_value_str(args[1]);
strm_string str3 = strm_str_new(NULL, strm_str_len(str1) + strm_str_len(str2));
char *p;
p = (char*)strm_str_ptr(str3);
memcpy(p, strm_str_ptr(str1), strm_str_len(str1));
memcpy(p+strm_str_len(str1), strm_str_ptr(str2), strm_str_len(str2));
p[strm_str_len(str3)] = '\0';
*ret = strm_str_value(str3);
return STRM_OK;
}
if (strm_int_p(args[0]) && strm_int_p(args[1])) {
*ret = strm_int_value(strm_value_int(args[0])+strm_value_int(args[1]));
return STRM_OK;
}
if (strm_num_p(args[0])) {
*ret = strm_flt_value(strm_value_flt(args[0])+strm_value_flt(args[1]));
return STRM_OK;
}
return STRM_NG;
}
void
strm_raise(strm_stream* strm, const char* msg)
{
if (!strm) return;
strm_set_exc(strm, NODE_ERROR_RUNTIME,
strm_str_value(strm_str_new(msg, strlen(msg))));
}
static int
exec_call(strm_stream* strm, strm_state* state, strm_string name, int argc, strm_value* argv, strm_value* ret)
{
int n = STRM_NG;
strm_value m;
if (argc > 0) {
strm_state* ns = strm_value_ns(argv[0]);
if (ns) {
n = strm_var_get(ns, name, &m);
}
else if (argc == 1 && strm_array_p(argv[0])) {
m = strm_str_value(name);
n = ary_get(strm, argv[0], 1, &m, ret);
if (n == STRM_OK) return STRM_OK;
}
}
if (n == STRM_NG) {
n = strm_var_get(state, name, &m);
}
if (n == STRM_OK) {
return strm_funcall(strm, m, argc, argv, ret);
}
strm_raise(strm, "function not found");
return STRM_NG;
}
static strm_value
csv_value(const char* p, size_t len)
{
const char *s = p;
const char *send = s+len;
long i=0;
double f, pow = 1;
int type = 0; /* 0: string, 1: int, 2: float */
/* skip preceding white spaces */
while (isspace((int)*s)) s++;
/* check if numbers */
while (s<send) {
switch (*s) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
if (type == STRING_TYPE) type = 1;
i = i*10 + (*s - '0');
pow *= 10;
break;
case '.':
type = 2;
f = i;
i = 0;
pow = 1;
break;
default:
return strm_str_value(p, len);
}
s++;
}
switch (type) {
case 1: /* int */
return strm_int_value(i);
case 2: /* float */
f += i / pow;
return strm_flt_value(f);
default:
return strm_str_value(p, len);
}
/* not reached */
}
static strm_value
csv_string(const char* p, strm_int len, enum csv_type ftype)
{
strm_string str;
switch (ftype) {
case TYPE_ESC: /* escaped_string */
{
const char *pend = p + len;
char *t, *s;
int in_quote = 0;
t = s = malloc(len+1);
while (p<pend) {
if (in_quote) {
if (*p == '\"') {
if (p[1] == '\"') {
p++;
*t++ = '"';
continue;
}
else {
in_quote = 0;
}
}
else {
*t++ = *p;
}
}
else if (*p == '"') {
in_quote = 1;
}
else {
*t++ = *p;
}
p++;
}
str = strm_str_new(s, t - s);
free(s);
}
break;
default:
if (isdigit((int)*p)) {
long sec, usec;
int offset;
if (strm_time_parse_time(p, len, &sec, &usec, &offset) == 0) {
return strm_time_new(sec, usec, offset);
}
}
str = strm_str_new(p, len);
break;
}
return strm_str_value(str);
}
static int
str_plus(strm_stream* strm, int argc, strm_value* args, strm_value* ret)
{
strm_string str1, str2, str3;
char *p;
strm_get_args(strm, argc, args, "SS", &str1, &str2);
str3 = strm_str_new(NULL, strm_str_len(str1) + strm_str_len(str2));
p = (char*)strm_str_ptr(str3);
memcpy(p, strm_str_ptr(str1), strm_str_len(str1));
memcpy(p+strm_str_len(str1), strm_str_ptr(str2), strm_str_len(str2));
p[strm_str_len(str3)] = '\0';
*ret = strm_str_value(str3);
return STRM_OK;
}
static int
exec_expr(strm_stream* strm, strm_state* state, node* np, strm_value* val)
{
int n;
if (np == NULL) {
return STRM_NG;
}
switch (np->type) {
/*
case NODE_ARGS:
break;
*/
case NODE_NS:
{
node_ns* ns = (node_ns*)np;
strm_state* s = strm_ns_find(state, node_to_sym(ns->name));
if (!s) {
strm_raise(strm, "failed to create namespace");
return STRM_NG;
}
return exec_expr(strm, s, ns->body, val);
}
case NODE_IMPORT:
{
node_import *ns = (node_import*)np;
strm_state* s = strm_ns_get(node_to_sym(ns->name));
if (!s) {
strm_raise(strm, "no such namespace");
return STRM_NG;
}
n = strm_env_copy(state, s);
if (n) {
strm_raise(strm, "failed to import");
return n;
}
return STRM_OK;
}
break;
case NODE_SKIP:
strm_set_exc(strm, NODE_ERROR_SKIP, strm_nil_value());
return STRM_OK;
case NODE_EMIT:
{
int i, n;
node_array* v0;
v0 = (node_array*)((node_emit*)np)->emit;
if (!v0) {
strm_emit(strm, strm_nil_value(), NULL);
}
else {
for (i = 0; i < v0->len; i++) {
n = exec_expr(strm, state, v0->data[i], val);
if (n) return n;
strm_emit(strm, *val, NULL);
}
}
return STRM_OK;
}
break;
case NODE_LET:
{
node_let *nlet = (node_let*)np;
n = exec_expr(strm, state, nlet->rhs, val);
if (n) {
strm_raise(strm, "failed to assign");
return n;
}
return strm_var_set(state, node_to_sym(nlet->lhs), *val);
}
case NODE_ARRAY:
{
node_array* v0 = (node_array*)np;
strm_array arr = strm_ary_new(NULL, v0->len);
strm_value *ptr = (strm_value*)strm_ary_ptr(arr);
int i=0;
for (i = 0; i < v0->len; i++, ptr++) {
n = exec_expr(strm, state, v0->data[i], ptr);
if (n) return n;
}
if (v0->headers) {
strm_ary_headers(arr) = ary_headers(v0->headers, v0->len);
}
if (v0->ns) {
strm_ary_ns(arr) = strm_ns_get(node_to_sym(v0->ns));
}
else {
strm_ary_ns(arr) = strm_str_null;
}
*val = strm_ary_value(arr);
return STRM_OK;
}
case NODE_IDENT:
{
node_ident* ni = (node_ident*)np;
n = strm_var_get(state, node_to_sym(ni->name), val);
if (n) {
strm_raise(strm, "failed to reference variable");
}
return n;
}
case NODE_IF:
{
strm_value v;
node_if* nif = (node_if*)np;
n = exec_expr(strm, state, nif->cond, &v);
if (n) return n;
if (strm_bool_p(v) && strm_value_bool(v)) {
return exec_expr(strm, state, nif->then, val);
}
else if (nif->opt_else != NULL) {
return exec_expr(strm, state, nif->opt_else, val);
}
else {
*val = strm_nil_value();
return STRM_OK;
}
}
break;
case NODE_OP:
{
node_op* nop = (node_op*)np;
strm_value args[2];
int i=0;
if (nop->lhs) {
n = exec_expr(strm, state, nop->lhs, &args[i++]);
if (n) return n;
}
if (nop->rhs) {
n = exec_expr(strm, state, nop->rhs, &args[i++]);
if (n) return n;
}
return exec_call(strm, state, node_to_sym(nop->op), i, args, val);
}
break;
case NODE_LAMBDA:
{
strm_lambda lambda = malloc(sizeof(struct strm_lambda));
if (!lambda) return STRM_NG;
lambda->type = STRM_PTR_LAMBDA;
lambda->body = (node_lambda*)np;
lambda->state = state;
*val = strm_ptr_value(lambda);
return STRM_OK;
}
break;
case NODE_CALL:
{
/* TODO: wip code of ident */
node_call* ncall = (node_call*)np;
int i;
node_nodes* v0 = (node_nodes*)ncall->args;
strm_value *args = malloc(sizeof(strm_value)*v0->len);
for (i = 0; i < v0->len; i++) {
n = exec_expr(strm, state, v0->data[i], &args[i]);
if (n) return n;
}
return exec_call(strm, state, node_to_sym(ncall->ident), i, args, val);
}
break;
case NODE_RETURN:
{
node_return* nreturn = (node_return*)np;
node_nodes* args = (node_nodes*)nreturn->rv;
strm_value arg;
if (!args) {
arg = strm_nil_value();
}
else {
switch (args->len) {
case 0:
arg = strm_nil_value();
break;
case 1:
n = exec_expr(strm, state, args->data[0], &arg);
if (n) return n;
break;
default:
{
strm_array ary = strm_ary_new(NULL, args->len);
strm_int i;
for (i=0; i<args->len; i++) {
n = exec_expr(strm, state, args->data[i], (strm_value*)&strm_ary_ptr(ary)[i]);
if (n) return n;
}
}
break;
}
}
strm_set_exc(strm, NODE_ERROR_RETURN, arg);
return STRM_OK;
}
break;
case NODE_NODES:
{
int i;
node_nodes* v = (node_nodes*)np;
for (i = 0; i < v->len; i++) {
n = exec_expr(strm, state, v->data[i], val);
if (n) {
if (strm) {
node_error* exc = strm->exc;
if (exc != NULL) {
node* n = v->data[i];
exc->fname = n->fname;
exc->lineno = n->lineno;
}
}
return n;
}
}
}
return STRM_OK;
case NODE_INT:
*val = strm_int_value(((node_int*)np)->value);
return STRM_OK;
case NODE_FLOAT:
*val = strm_int_value(((node_float*)np)->value);
return STRM_OK;
case NODE_BOOL:
*val = strm_bool_value(((node_bool*)np)->value);
return STRM_OK;
case NODE_NIL:
*val = strm_nil_value();
return STRM_OK;
case NODE_STR:
*val = strm_str_value(node_to_str(((node_str*)np)->value));
return STRM_OK;
default:
break;
}
return STRM_NG;
}
void
node_raise(strm_state* state, const char* msg) {
state->exc = malloc(sizeof(node_error));
state->exc->type = NODE_ERROR_RUNTIME;
state->exc->arg = strm_str_value(msg, strlen(msg));
}
static int
csv_accept(strm_stream* strm, strm_value data)
{
strm_array ary;
strm_string line = strm_value_str(data);
strm_value *bp;
const char *fbeg;
const char *ptr;
const char *pend;
int fieldcnt;
int in_quote = 0, all_str = 1;
int i = 0;
enum csv_type ftype;
enum csv_type* types;
struct csv_data *cd = strm->data;
if (cd->prev) {
strm_int len = strm_str_len(cd->prev)+strm_str_len(line)+1;
char* tmp = malloc(len);
memcpy(tmp, strm_str_ptr(cd->prev), strm_str_len(cd->prev));
*(tmp+strm_str_len(cd->prev)) = '\n';
memcpy(tmp+strm_str_len(cd->prev)+1, strm_str_ptr(line), strm_str_len(line));
line = strm_str_new(tmp, len);
free(tmp);
cd->prev = strm_str_null;
}
fieldcnt = count_fields(line);
if (fieldcnt == -1) {
cd->prev = line;
return STRM_NG;
}
if (cd->n > 0 && fieldcnt != cd->n)
return STRM_NG;
ptr = strm_str_ptr(line);
pend = ptr + strm_str_len(line);
ary = strm_ary_new(NULL, fieldcnt);
if (!ary) return STRM_NG;
bp = (strm_value*)strm_ary_ptr(ary);
types = cd->types;
ftype = types ? types[0] : TYPE_UNSPC;
for (fbeg=ptr; ptr<pend; ptr++) {
if (in_quote) {
if (*ptr == '\"') {
if (ptr[1] == '\"') {
ptr++;
ftype = TYPE_ESC;
continue;
}
in_quote = 0;
}
continue;
}
switch(*ptr) {
case '\"':
in_quote = 1;
if (ptr == fbeg) {
ftype = TYPE_STR;
fbeg = ptr+1;
}
else {
ftype = TYPE_ESC;
}
continue;
case ',':
*bp = csv_value(fbeg, ptr-fbeg, ftype);
if (!strm_string_p(*bp)) all_str = 0;
bp++;
fbeg = ptr+1;
i++;
ftype = types ? types[i] : TYPE_UNSPC;
break;
default:
continue;
}
}
/* trim newline at the end */
if (ptr[-1] == '\n') {
ptr--;
}
/* trim carriage return at the end */
if (ptr[-1] == '\r') {
ptr--;
}
*bp = csv_value(fbeg, ptr-fbeg, ftype);
if (!strm_string_p(*bp)) all_str = 0;
/* check headers */
if (!cd->headers && !cd->types) {
if (all_str) {
cd->headers = ary;
ary = strm_ary_null;
}
cd->n = fieldcnt;
}
if (ary) {
/* set headers if any */
if (cd->headers)
strm_ary_headers(ary) = cd->headers;
if (!cd->types) {
/* first data line (after optinal header line) */
if (cd->headers) {
if (all_str) { /* data line is all string; emit header line */
strm_emit(strm, strm_ary_value(cd->headers), NULL);
cd->headers = strm_ary_null;
}
else { /* intern header strings */
strm_array h = cd->headers;
strm_value *p = strm_ary_ptr(h);
int i;
for (i=0; i<strm_ary_len(h); i++) {
strm_string str = strm_value_str(p[i]);
p[i] = strm_str_value(strm_str_intern_str(str));
}
}
}
/* initialize types (determined by first data line) */
cd->types = malloc(sizeof(enum csv_type)*fieldcnt);
if (!cd->types) return STRM_NG;
for (i=0; i<fieldcnt; i++) {
cd->types[i] = csv_type(strm_ary_ptr(ary)[i]);
}
}
else {
/* type check */
for (i=0; i<fieldcnt; i++) {
if (cd->types[i] != csv_type(strm_ary_ptr(ary)[i])) {
/* type mismatch (error); skip this line */
strm_raise(strm, "csv type mismatch");
return STRM_NG;
}
}
}
strm_emit(strm, strm_str_value(ary), NULL);
}
return STRM_OK;
}
static void
csv_accept(strm_task* task, strm_value data)
{
strm_array *ary;
strm_string *line = strm_value_str(data);
strm_value *bp;
char *tmp, *tptr;
const char *ptr;
const char *pend;
int fieldcnt, len;
int in_quote = 0, quoted = 0, all_str = 1;;
struct csv_data *cd = task->data;
if (cd->prev) {
strm_string *str = strm_str_new(NULL, cd->prev->len+line->len+1);
tmp = (char*)str->ptr;
memcpy(tmp, cd->prev->ptr, cd->prev->len);
*(tmp+cd->prev->len) = '\n';
memcpy(tmp+cd->prev->len+1, line->ptr, line->len);
line = str;
cd->prev = NULL;
}
fieldcnt = count_fields(line);
if (fieldcnt == -1) {
cd->prev = line;
return;
}
if (cd->n > 0 && fieldcnt != cd->n)
return;
ptr = line->ptr;
pend = ptr + line->len;
ary = strm_ary_new(NULL, fieldcnt);
if (!ary) return;
bp = (strm_value*)ary->ptr;
len = line->len;
tmp = malloc(len+1);
if (!tmp) return;
*tmp='\0';
ptr=line->ptr;
tptr=tmp;
for (;ptr<pend; ptr++) {
if (in_quote) {
if (*ptr == '\"') {
if (ptr[1] == '\"') {
*tptr++ = '\"';
ptr++;
continue;
}
in_quote = 0;
}
else
*tptr++ = *ptr;
continue;
}
switch(*ptr) {
case '\"':
in_quote = 1;
quoted = 1;
continue;
case ',':
if (quoted) {
*bp = strm_str_value(tmp, tptr-tmp);
}
else {
*bp = csv_value(tmp, tptr-tmp);
}
if (!strm_str_p(*bp)) all_str = 0;
bp++;
tptr = tmp;
quoted = 0;
break;
default:
*tptr++ = *ptr;
continue;
}
}
/* trim newline at the end */
if (tptr > tmp && tptr[-1] == '\n') {
tptr--;
}
/* trim carriage return at the end */
if (tptr > tmp && tptr[-1] == '\r') {
tptr--;
}
*bp = csv_value(tmp, tptr-tmp);
if (!strm_str_p(*bp)) all_str = 0;
free(tmp);
/* check headers */
if (!cd->headers && !cd->types) {
if (all_str) {
cd->headers = ary;
ary = NULL;
}
cd->n = fieldcnt;
}
if (ary) {
int i;
/* set headers if any */
if (cd->headers)
ary->headers = cd->headers;
if (!cd->types) {
/* first data line (after optinal header line) */
if (cd->headers) {
if (all_str) { /* data line is all string; emit header line */
strm_emit(task, strm_ptr_value(cd->headers), NULL);
cd->headers = NULL;
}
else { /* intern header strings */
strm_array *h = cd->headers;
strm_value *p = (strm_value*)h->ptr;
int i;
for (i=0; i<h->len; i++) {
strm_string *str = strm_value_str(p[i]);
p[i] = strm_ptr_value(strm_str_intern_str(str));
}
}
}
/* initialize types (determined by first data line) */
cd->types = malloc(sizeof(enum csv_type)*fieldcnt);
if (!cd->types) return;
for (i=0; i<fieldcnt; i++) {
cd->types[i] = csv_type(ary->ptr[i]);
}
}
else {
/* type check */
for (i=0; i<fieldcnt; i++) {
if (cd->types[i] != csv_type(ary->ptr[i])) {
if (cd->types[i] == STRING_TYPE) {
/* convert value to string */
((strm_value*)ary->ptr)[i] = strm_ptr_value(strm_to_str(ary->ptr[i]));
}
else {
/* type mismatch (error); skip this line */
return;
}
}
}
}
strm_emit(task, strm_ptr_value(ary), NULL);
}
}
void
node_raise(node_ctx* ctx, const char* msg) {
ctx->exc = malloc(sizeof(node_error));
ctx->exc->type = NODE_ERROR_RUNTIME;
ctx->exc->arg = strm_str_value(msg, strlen(msg));
}
