Somewhat decent cpp analysis for ccanlint.

[ccan] / tools / ccanlint / ccanlint.h

diff --git a/tools/ccanlint/ccanlint.h b/tools/ccanlint/ccanlint.h
index ac169fa81156b57452708208af65fecd05402fdf..804f80249d9204b362032e592c29a52d5e7b66b6 100644 (file)
--- a/tools/ccanlint/ccanlint.h
+++ b/tools/ccanlint/ccanlint.h
@@ -49,13 +49,49 @@ struct ccanlint {
 /* Ask the user a yes/no question: the answer is NO if there's an error. */
 bool ask(const char *question);
 
+enum line_info_type {
+       PREPROC_LINE, /* Line starts with # */
+       CODE_LINE, /* Code (ie. not pure comment). */
+       DOC_LINE, /* Line with kernel-doc-style comment. */
+       COMMENT_LINE, /* (pure) comment line */
+};
+
+/* So far, only do simple #ifdef/#ifndef/#if defined/#if !defined tests,
+ * and #if <SYMBOL>/#if !<SYMBOL> */
+struct pp_conditions {
+       /* We're inside another ifdef? */
+       struct pp_conditions *parent;
+
+       enum {
+               PP_COND_IF,
+               PP_COND_IFDEF,
+               PP_COND_UNKNOWN,
+       } type;
+
+       bool inverse;
+       const char *symbol;
+};
+
+/* Preprocessor information about each line. */
+struct line_info {
+       enum line_info_type type;
+
+       /* Is this actually a continuation of line above? (which ends in \) */
+       bool continued;
+
+       /* Conditions for this line to be compiled. */
+       struct pp_conditions *cond;
+};
+
 struct ccan_file {
        struct list_node list;
 
        char *name;
 
+       /* Use get_ccan_file_lines / get_ccan_line_info to fill these. */
        unsigned int num_lines;
        char **lines;
+       struct line_info *line_info;
 
        struct list_head *doc_sections;
 };
@@ -63,9 +99,25 @@ struct ccan_file {
 /* Use this rather than accessing f->lines directly: loads on demand. */
 char **get_ccan_file_lines(struct ccan_file *f);
 
+/* Use this rather than accessing f->lines directly: loads on demand. */
+struct line_info *get_ccan_line_info(struct ccan_file *f);
+
+enum line_compiled {
+       NOT_COMPILED,
+       COMPILED,
+       MAYBE_COMPILED,
+};
+
+/* Simple evaluator: if this pre-processor symbol is defined to this
+ * value, is this line compiled? (Other symbols assumed undefined) */
+enum line_compiled get_ccan_line_pp(struct pp_conditions *cond,
+                                   const char *symbol,
+                                   unsigned int value);
+
 /* Similarly for ->doc_sections */
 struct list_head *get_ccan_file_docs(struct ccan_file *f);
 
+
 /* Call the reporting on every line in the file.  sofar contains
  * previous results. */
 char *report_on_lines(struct list_head *files,
@@ -78,6 +130,4 @@ extern struct ccanlint has_main_header;
 
 /* Normal tests. */
 extern struct ccanlint trailing_whitespace;
-
-
 #endif /* CCAN_LINT_H */