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/*
* Copyright (C) Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
ngx_int_t
ngx_http_script_compile_lite(ngx_conf_t *cf, ngx_array_t *sources,
ngx_array_t **lengths, ngx_array_t **values,
ngx_http_script_compile_lite_start_pt start,
ngx_http_script_compile_lite_end_pt end)
{
uintptr_t *code;
ngx_uint_t i;
ngx_table_elt_t *src;
ngx_http_variable_t *var;
ngx_http_script_var_code_t *var_code;
if (sources->nelts == 0) {
return NGX_OK;
}
if (*lengths == NULL) {
*lengths = ngx_array_create(cf->pool, 64, 1);
if (*lengths == NULL) {
return NGX_ERROR;
}
}
if (*values == NULL) {
*values = ngx_array_create(cf->pool, 256, 1);
if (*values == NULL) {
return NGX_ERROR;
}
}
src = sources->elts;
for (i = 0; i < sources->nelts; i++) {
if (src[i].value.data[0] == '$') {
if (start(&src[i], *lengths, *values, 0) != NGX_OK) {
return NGX_ERROR;
}
src[i].value.len--;
src[i].value.data++;
var = ngx_http_add_variable(cf, &src[i].value, 0);
if (var == NULL) {
return NGX_ERROR;
}
var_code = ngx_array_push_n(*lengths,
sizeof(ngx_http_script_var_code_t));
if (var_code == NULL) {
return NGX_ERROR;
}
var_code->code = (ngx_http_script_code_pt)
ngx_http_script_copy_var_len;
var_code->index = var->index;
var_code = ngx_array_push_n(*values,
sizeof(ngx_http_script_var_code_t));
if (var_code == NULL) {
return NGX_ERROR;
}
var_code->code = ngx_http_script_copy_var;
var_code->index = var->index;
if (end(*lengths, *values) != NGX_OK) {
return NGX_ERROR;
}
continue;
}
if (start(&src[i], *lengths, *values, 1) != NGX_OK) {
return NGX_ERROR;
}
}
code = ngx_array_push_n(*lengths, sizeof(uintptr_t));
if (code == NULL) {
return NGX_ERROR;
}
*code = (uintptr_t) NULL;
code = ngx_array_push_n(*values, sizeof(uintptr_t));
if (code == NULL) {
return NGX_ERROR;
}
*code = (uintptr_t) NULL;
return NGX_OK;
}
#if 0
static void *
ngx_http_script_start_code(ngx_pool_t *pool, ngx_array_t **codes, size_t size)
{
if (*codes == NULL) {
*codes = ngx_array_create(pool, 256, 1);
if (*codes == NULL) {
return NULL;
}
}
return ngx_array_push_n(*codes, size);
}
#endif
size_t
ngx_http_script_copy_len(ngx_http_script_engine_t *e)
{
ngx_http_script_copy_code_t *code;
code = (ngx_http_script_copy_code_t *) e->lite.ip;
e->lite.ip += sizeof(ngx_http_script_copy_code_t);
return code->len;
}
void
ngx_http_script_copy(ngx_http_script_engine_t *e)
{
ngx_http_script_copy_code_t *code;
code = (ngx_http_script_copy_code_t *) e->lite.ip;
e->lite.pos = ngx_cpymem(e->lite.pos,
e->lite.ip + sizeof(ngx_http_script_copy_code_t),
code->len);
e->lite.ip += sizeof(ngx_http_script_copy_code_t)
+ ((code->len + sizeof(uintptr_t) - 1) & ~(sizeof(uintptr_t) - 1));
}
size_t
ngx_http_script_copy_var_len(ngx_http_script_engine_t *e)
{
ngx_http_variable_value_t *value;
ngx_http_script_var_code_t *code;
code = (ngx_http_script_var_code_t *) e->lite.ip;
e->lite.ip += sizeof(ngx_http_script_var_code_t);
value = ngx_http_get_indexed_variable(e->lite.request, code->index);
if (value == NULL || value == NGX_HTTP_VARIABLE_NOT_FOUND) {
return 0;
}
return value->text.len;
}
void
ngx_http_script_copy_var(ngx_http_script_engine_t *e)
{
ngx_http_variable_value_t *value;
ngx_http_script_var_code_t *code;
code = (ngx_http_script_var_code_t *) e->lite.ip;
e->lite.ip += sizeof(ngx_http_script_var_code_t);
value = ngx_http_get_indexed_variable(e->lite.request, code->index);
if (value == NULL || value == NGX_HTTP_VARIABLE_NOT_FOUND) {
return;
}
e->lite.pos = ngx_cpymem(e->lite.pos, value->text.data, value->text.len);
}
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