OOXML files support

src/parsing/doc.c

@@ -0,0 +1,94 @@
+#include "doc.h"
+
+static void dumpText(mceTextReader_t *reader, dyn_buffer_t *buf) {
+
+    mce_skip_attributes(reader);
+
+    mce_start_children(reader) {
+        mce_start_element(reader, NULL, _X("t")) {
+            mce_skip_attributes(reader);
+            mce_start_children(reader) {
+                mce_start_text(reader) {
+                    char *str = (char *) xmlTextReaderConstValue(reader->reader);
+                    dyn_buffer_append_string(buf, str);
+                    dyn_buffer_write_char(buf, ' ');
+                } mce_end_text(reader);
+            } mce_end_children(reader);
+        } mce_end_element(reader);
+
+        mce_start_element(reader, NULL, NULL) {
+            dumpText(reader, buf);
+        } mce_end_element(reader);
+
+    } mce_end_children(reader)
+}
+
+__always_inline
+int should_read_part(opcPart part) {
+
+    char *part_name = (char *) part;
+
+    if (    // Word
+            strcmp(part_name, "word/document.xml") == 0
+            || strncmp(part_name, "word/footer", sizeof("word/footer") - 1) == 0
+            || strncmp(part_name, "word/header", sizeof("word/header") - 1) == 0
+            // PowerPoint
+            || strncmp(part_name, "ppt/slides/slide", sizeof("ppt/slides/slide") - 1) == 0
+            || strncmp(part_name, "ppt/notesSlides/notesSlide", sizeof("ppt/notesSlides/notesSlide") - 1) == 0
+            // Excel
+            || strncmp(part_name, "xl/worksheets/sheet", sizeof("xl/worksheets/sheet") - 1) == 0
+            || strcmp(part_name, "xl/sharedStrings.xml") == 0
+            || strcmp(part_name, "xl/workbook.xml") == 0
+            ) {
+        return TRUE;
+    }
+
+    return FALSE;
+}
+
+void read_part(opcContainer *c, dyn_buffer_t *buf, opcPart part) {
+
+    mceTextReader_t reader;
+    int ret = opcXmlReaderOpen(c, &reader, part, NULL, "UTF-8", 0);
+
+    if (ret != OPC_ERROR_NONE) {
+        //todo verbose
+        return;
+    }
+
+    mce_start_document(&reader) {
+        mce_start_element(&reader, NULL, NULL) {
+            dumpText(&reader, buf);
+        } mce_end_element(&reader);
+    }mce_end_document(&reader);
+
+    mceTextReaderCleanup(&reader);
+}
+
+void parse_doc(void *mem, size_t mem_len, document_t *doc) {
+
+    opcContainer *c = opcContainerOpenMem(mem, mem_len, OPC_OPEN_READ_ONLY, NULL);
+    if (c == NULL) {
+        //todo verbose
+        return;
+    }
+
+    dyn_buffer_t buf = dyn_buffer_create();
+
+    opcPart part = opcPartGetFirst(c);
+    do {
+        if (should_read_part(part)) {
+            read_part(c, &buf, part);
+        }
+    } while ((part = opcPartGetNext(c, part)));
+
+    opcContainerClose(c, OPC_CLOSE_NOW);
+    dyn_buffer_write_char(&buf, '\0');
+
+    meta_line_t *meta = malloc(sizeof(meta_line_t) + buf.cur);
+    meta->key = MetaContent;
+    strcpy(meta->strval, buf.buf);
+    APPEND_META(doc, meta)
+
+    dyn_buffer_destroy(&buf);
+}