first batch of resource-handling functions
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src/resources.c
204
src/resources.c
@ -17,6 +17,8 @@
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*-------------------------------------------------------------------------
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <zip.h>
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#include "wintype.h"
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#include "scode.h"
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@ -24,6 +26,17 @@
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#include "log.h"
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#include "resources.h"
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typedef struct tagRESFILE {
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struct tagRESFILE *next;
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struct tagRESFILE *prev;
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zip_t *resource;
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} RESFILE, *PRESFILE;
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typedef struct tagRESOURCEINFO {
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zip_t *resource_file;
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zip_stat_t entryinfo;
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} RESOURCEINFO, *PRESOURCEINFO;
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/* conversion table from zip error codes to our HRESULT values */
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static const struct tagCONVERSIONTABLE {
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int zip_err_code;
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@ -46,6 +59,7 @@ extern uint8_t _binary_sysresources_zip_end;
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extern uint8_t _binary_sysresources_zip_size;
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static zip_t *sysresource = NULL; /* system resource file */
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static PRESFILE resfiles = NULL; /* all open resource files */
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static HRESULT ziperror_to_hresult(zip_error_t *errinfo)
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{
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@ -57,8 +71,198 @@ static HRESULT ziperror_to_hresult(zip_error_t *errinfo)
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return MAKE_SCODE(SEVERITY_ERROR, FACILITY_ZIP, errinfo->zip_err);
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}
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static BOOL check_in_list(PRESFILE presfile)
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{
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register PRESFILE p = resfiles;
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do
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{
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if (p == presfile)
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return TRUE;
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p = p->next;
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} while (p != resfiles);
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return FALSE;
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}
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HRESULT Rsrc_load_file(LPCSTR filename, PHRESFILE newhandle)
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{
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HRESULT hr = S_OK;
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PRESFILE pfile = NULL;
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zip_error_t errinfo;
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if (!newhandle)
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return E_POINTER;
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*newhandle = NULL;
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pfile = (PRESFILE)malloc(sizeof(RESFILE));
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if (!pfile)
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return E_OUTOFMEMORY;
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memset(pfile, 0, sizeof(RESFILE));
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zip_error_init(&errinfo);
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pfile->resource = zip_open(filename, ZIP_RDONLY, &errinfo);
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if (!(pfile->resource))
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hr = ziperror_to_hresult(&errinfo);
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zip_error_fini(&errinfo);
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if (SUCCEEDED(hr))
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{
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if (resfiles)
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{
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pfile->next = resfiles;
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pfile->prev = resfiles->prev;
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resfiles->prev->next = pfile;
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resfiles->prev = pfile;
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}
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else
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pfile->next = pfile->prev = pfile;
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resfiles = pfile;
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*newhandle = (HRESFILE)pfile;
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}
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return hr;
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}
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static HRESULT internal_close(PRESFILE presfile)
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{
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HRESULT hr = S_OK;
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if (zip_close(presfile->resource))
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hr = ziperror_to_hresult(zip_get_error(presfile->resource));
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if (resfiles == presfile)
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{
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resfiles = presfile->next;
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if (resfiles == presfile)
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resfiles = NULL;
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}
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presfile->prev->next = presfile->next;
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presfile->next->prev = presfile->prev;
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free(presfile);
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return hr;
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}
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HRESULT Rsrc_close_file(HRESFILE handle)
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{
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if (check_in_list((PRESFILE)handle))
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return internal_close((PRESFILE)handle);
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return E_HANDLE;
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}
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HRESULT Rsrc_find_resource(HRESFILE hfile, LPCSTR name, LPCSTR type, PHRSRC presource)
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{
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HRESULT hr = S_OK;
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PRESFILE pfile = (PRESFILE)hfile;
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PRESOURCEINFO info = NULL;
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zip_t *theresource;
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zip_int64_t index;
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if (pfile)
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{
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if (check_in_list(pfile))
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theresource = pfile->resource;
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else
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return E_HANDLE;
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}
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else
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theresource = sysresource;
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ASSERT(theresource);
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if (!name)
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return E_INVALIDARG;
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if (!presource)
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return E_POINTER;
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*presource = NULL;
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index = zip_name_locate(theresource, name, ZIP_FL_NOCASE);
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if (index < 0)
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hr = ziperror_to_hresult(zip_get_error(theresource));
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if (SUCCEEDED(hr))
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{
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info = (PRESOURCEINFO)malloc(sizeof(RESOURCEINFO));
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if (info)
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{
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if (zip_stat_index(theresource, index, ZIP_FL_NOCASE, &(info->entryinfo)))
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hr = ziperror_to_hresult(zip_get_error(theresource));
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if (SUCCEEDED(hr))
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{
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info->entryinfo.index = index;
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info->entryinfo.valid |= ZIP_STAT_INDEX;
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info->resource_file = theresource;
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*presource = (HRSRC)info;
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}
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if (FAILED(hr))
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free(info);
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}
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else
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hr = E_OUTOFMEMORY;
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}
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return hr;
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}
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HRESULT Rsrc_free_resource(HRSRC resource)
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{
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if (!resource)
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return E_HANDLE;
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free((PRESOURCEINFO)resource);
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return S_OK;
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}
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UINT Rsrc_sizeof_resource(HRSRC resource)
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{
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PRESOURCEINFO p = (PRESOURCEINFO)resource;
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if (!p)
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return 0;
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if (p->entryinfo.valid & ZIP_STAT_SIZE)
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return (UINT)(p->entryinfo.size);
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return 0;
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}
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HRESULT Rsrc_read_resource_here(HRSRC resource, PVOID buffer, UINT size, PUINT actual_read)
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{
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HRESULT hr = S_OK;
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PRESOURCEINFO p = (PRESOURCEINFO)resource;
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UINT max_size = size;
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UINT already_read = 0;
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PBYTE pbuffer = (PBYTE)buffer;
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zip_int64_t nread;
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zip_file_t *fp;
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if (!p)
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return E_HANDLE;
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if (!buffer)
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return E_POINTER;
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if (p->entryinfo.valid & ZIP_STAT_SIZE)
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{
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if ((UINT)(p->entryinfo.size) < max_size)
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max_size = (UINT)(p->entryinfo.size);
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else if ((UINT)(p->entryinfo.size) > max_size)
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hr = UPIWIN_S_PARTIALRSRC;
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}
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fp = zip_fopen_index(p->resource_file, p->entryinfo.index, ZIP_FL_NOCASE);
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if (fp)
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{
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while (SUCCEEDED(hr) && (max_size > 0))
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{
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nread = zip_fread(fp, pbuffer, max_size);
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if (nread < 0)
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{
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hr = ziperror_to_hresult(zip_get_error(p->resource_file));
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break;
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}
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pbuffer += (UINT_PTR)nread;
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max_size -= (UINT)nread;
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already_read += (UINT)nread;
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}
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zip_fclose(fp);
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}
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else
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hr = ziperror_to_hresult(zip_get_error(p->resource_file));
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if (actual_read)
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*actual_read = already_read;
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return hr;
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}
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static void rsrc_cleanup(void)
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{
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while (resfiles)
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internal_close(resfiles);
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zip_close(sysresource);
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sysresource = NULL;
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}
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@ -25,7 +25,15 @@
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typedef HANDLE HRESFILE; /* handle to resource file */
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typedef HANDLE HRSRC; /* handle to resource */
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typedef HRESFILE *PHRESFILE;
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typedef HRSRC *PHRSRC;
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extern HRESULT Rsrc_load_file(LPCSTR filename, PHRESFILE newhandle);
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extern HRESULT Rsrc_close_file(HRESFILE handle);
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extern HRESULT Rsrc_find_resource(HRESFILE hfile, LPCSTR name, LPCSTR type, PHRSRC presource);
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extern HRESULT Rsrc_free_resource(HRSRC resource);
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extern UINT Rsrc_sizeof_resource(HRSRC resource);
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extern HRESULT Rsrc_read_resource_here(HRSRC resource, PVOID buffer, UINT size, PUINT actual_read);
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extern HRESULT Rsrc_setup(void);
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@ -107,6 +107,8 @@
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#define UPIWIN_E_INVALIDSCRIPT SCODE_CAST(0x80060000) /* invalid script file */
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#define UPIWIN_E_NOSCRIPT SCODE_CAST(0x80060001) /* no script specified */
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#define UPIWIN_S_PARTIALRSRC SCODE_CAST(0x00060000) /* partial resource read */
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/* libzip error codes */
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#define ZIP_E_MULTIDISK MAKE_SCODE(SEVERITY_ERROR, FACILITY_ZIP, 1) /* multidisk not supported */
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#define ZIP_E_RENAME MAKE_SCODE(SEVERITY_ERROR, FACILITY_ZIP, 2) /* rename temp file failed */
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