C++ (Cpp) sre_vm_pike_create_ctx示例

示例#1

文件： ConsoleApplication1.cpp 项目： omako/s

RegexSearch::RegexSearch(const std::string& regex,
                         Report* report,
                         const std::wstring& file_path)
    : regex_(regex),
      report_(report),
      file_path_(file_path),
      block_offset_(0),
      match_offset_(0),
      sre_pool_(nullptr),
      sre_ctx_(nullptr) {
  sre_pool_ = sre_create_pool(4096);
  assert(sre_pool_);
  sre_uint_t ncaps;
  sre_int_t err_offset;
  sre_regex_t* sre_regex = sre_regex_parse(
      sre_pool_,
      const_cast<sre_char*>(reinterpret_cast<const sre_char*>(regex_.c_str())),
      &ncaps, 0, &err_offset);
  assert(sre_regex);
  sre_program_t* sre_program = sre_regex_compile(sre_pool_, sre_regex);
  assert(sre_program);
  matches_.resize(2 * (ncaps + 1));
  sre_ctx_ = sre_vm_pike_create_ctx(sre_pool_, sre_program, matches_.data(),
                                    matches_.size() * sizeof(sre_int_t));
  assert(sre_ctx_);
}

示例#2

文件： ngx_http_replace_filter_module.c 项目： adamesss/replace-filter-nginx-module

static ngx_int_t
ngx_http_replace_header_filter(ngx_http_request_t *r)
{
    size_t                         size;
    ngx_str_t                      skip;
    ngx_pool_cleanup_t            *cln;
    ngx_http_replace_ctx_t        *ctx;
    ngx_http_replace_loc_conf_t  *rlcf;

    rlcf = ngx_http_get_module_loc_conf(r, ngx_http_replace_filter_module);

    dd("replace header filter");

    if (rlcf->regexes.nelts == 0
        || r->headers_out.content_length_n == 0
        || (r->headers_out.content_encoding
            && r->headers_out.content_encoding->value.len)
        || ngx_http_test_content_type(r, &rlcf->types) == NULL)
    {
        return ngx_http_next_header_filter(r);
    }

    dd("skip: %p", rlcf->skip);

    if (rlcf->skip != NULL) {
        if (ngx_http_complex_value(r, rlcf->skip, &skip) != NGX_OK) {
            return NGX_ERROR;
        }

        if (skip.len && (skip.len != 1 || skip.data[0] != '0')) {
            return ngx_http_next_header_filter(r);
        }
    }

    ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_replace_ctx_t));
    if (ctx == NULL) {
        return NGX_ERROR;
    }

    ctx->last_special = &ctx->special;
    ctx->last_pending = &ctx->pending;
    ctx->last_pending2 = &ctx->pending2;
    ctx->last_captured = &ctx->captured;

    ctx->sub = ngx_pcalloc(r->pool,
                           rlcf->multi_replace.nelts * sizeof(ngx_str_t));
    if (ctx->sub == NULL) {
        return NGX_ERROR;
    }

    ctx->ovector = ngx_palloc(r->pool, rlcf->ovecsize);
    if (ctx->ovector == NULL) {
        return NGX_ERROR;
    }

    size = ngx_align(rlcf->regexes.nelts, 8) / 8;
    ctx->disabled = ngx_pcalloc(r->pool, size);
    if (ctx->disabled == NULL) {
        return NGX_ERROR;
    }

    ctx->vm_pool = sre_create_pool(1024);
    if (ctx->vm_pool == NULL) {
        return NGX_ERROR;
    }

    dd("created vm pool %p", ctx->vm_pool);

    cln = ngx_pool_cleanup_add(r->pool, 0);
    if (cln == NULL) {
        sre_destroy_pool(ctx->vm_pool);
        return NGX_ERROR;
    }

    cln->data = ctx->vm_pool;
    cln->handler = ngx_http_replace_cleanup_pool;

    ctx->vm_ctx = sre_vm_pike_create_ctx(ctx->vm_pool, rlcf->program,
                                         ctx->ovector, rlcf->ovecsize);
    if (ctx->vm_ctx == NULL) {
        return NGX_ERROR;
    }

    ngx_http_set_ctx(r, ctx, ngx_http_replace_filter_module);

    ctx->last_out = &ctx->out;

    r->filter_need_in_memory = 1;

    if (r == r->main) {
        ngx_http_clear_content_length(r);

        if (rlcf->last_modified == NGX_HTTP_REPLACE_CLEAR_LAST_MODIFIED) {
            ngx_http_clear_last_modified(r);
        }
    }

    return ngx_http_next_header_filter(r);
}