X-Git-Url: https://diplodocus.org/git/nmh/blobdiff_plain/096cb902c659b224590c2989020d437721d8e9e5..8206fbf:/h/fmt_scan.h?ds=inline

diff --git a/h/fmt_scan.h b/h/fmt_scan.h
index a2bff891..2bcc265f 100644
--- a/h/fmt_scan.h
+++ b/h/fmt_scan.h
@@ -37,6 +37,8 @@ struct comp {
 #define	CT_ADDR       (1<<0)	/* referenced as address    */
 #define	CT_DATE       (1<<1)	/* referenced as date       */
 
+#define CT_BITS       "\020\01ADDR\02DATE"
+
 /*
  * c_flags bits
  */
@@ -45,7 +47,7 @@ struct comp {
 #define	CF_DATEFAB    (1<<2)	/* datefield fabricated */
 #define CF_TRIMMED    (1<<3)	/* Component has been trimmed */
 
-extern int fmt_norm;
+#define CF_BITS       "\020\01TRUE\02PARSED\03CF_DATEFAB\04TRIMMED"
 
 /*
  * This structure defines one formatting instruction.
@@ -81,6 +83,21 @@ struct format {
  * prototypes used by the format engine
  */
 
+/*
+ * These are the definitions used by the callbacks for fmt_scan()
+ */
+
+typedef char * (*formataddr_cb)(char *, char *);
+typedef char * (*concataddr_cb)(char *, char *);
+typedef void (*trace_cb)(void *, struct format *, int, char *, const char *);
+
+struct fmt_callbacks {
+    formataddr_cb	formataddr;
+    concataddr_cb	concataddr;
+    trace_cb		trace_func;
+    void *		trace_context;
+};
+
 /*
  * Create a new format string.  Arguments are:
  *
@@ -121,11 +138,11 @@ int fmt_compile (char *fstring, struct format **fmt, int reset);
  * Interpret a sequence of compiled format instructions.  Arguments are:
  *
  * format	- Array of format instructions generated by fmt_compile()
- * scanl	- Passed-in character array that will contain the output
- *		  of the format instructions.  Is always terminated with
- *		  a newline (\n).
- * max		- Maximum number of bytes to be written to "scanl" (in other
- *		  words, the buffer size).  Includes the trailing NUL.
+ * scanl	- Passed-in charstring_t object (created with
+ *		  charstring_create() and later destroyed with
+ *		  charstring_free()) that will contain the output of the
+ *		  format instructions.  Is always terminated with a
+ *		  newline (\n).
  * width	- Maximum number of displayed characters.  Does not include
  *		  characters marked as nonprinting or (depending on the
  *		  encoding) bytes in a multibyte encoding that exceed the
@@ -140,12 +157,20 @@ int fmt_compile (char *fstring, struct format **fmt, int reset);
  *		dat[3] - %(width)
  *		dat[4] - %(unseen)
  *
+ * callbacks	- A set of a callback functions used by the format engine.
+ *		  Can be NULL.  If structure elements are NULL, a default
+ *		  function will be used.  Callback structure elements are:
+ *
+ *		formataddr	- A callback for the %(formataddr) instruction
+ *		concataddr	- A callback for the %(concataddr) instruction
+ *		trace		- Called for every format instruction executed
+ *
  * The return value is a pointer to the next format instruction to
  * execute, which is currently always NULL.
  */
 
-struct format *fmt_scan (struct format *format, char *scanl, size_t max,
-			 int width, int *dat);
+struct format *fmt_scan (struct format *format, charstring_t scanl, int width,
+			 int *dat, struct fmt_callbacks *callbacks);
 
 /*
  * Free a format structure and/or component hash table.  Arguments are:
@@ -158,6 +183,12 @@ struct format *fmt_scan (struct format *format, char *scanl, size_t max,
 
 void fmt_free (struct format *fmt, int reset);
 
+/*
+ * Free all of the component text structures in the component hash table
+ */
+
+void fmt_freecomptext(void);
+
 /*
  * Search for a component structure in the component hash table.  Arguments are:
  *
@@ -178,7 +209,7 @@ struct comp *fmt_findcomp(char *component);
  * Identical to fmd_findcomp(), but is case-INSENSITIVE.
  */
 
-struct comp *fmt_findcasecmp(char *component);
+struct comp *fmt_findcasecomp(char *component);
 
 /*
  * Add a component entry to the component hash table
@@ -236,6 +267,25 @@ int fmt_addcomptext(char *component, char *text);
 
 void fmt_appendcomp(int bucket, char *component, char *text);
 
+/*
+ * Iterate over the complete hash table of component structures.
+ *
+ * Arguments are:
+ *
+ * comp		- Pointer to the current component structure.  The next
+ *		  component in the hash table after this component.  To
+ *		  start (or restart) the iteration of the hash table
+ *		  this argument should be NULL.
+ * bucket	- Pointer to hash bucket.  Will be managed by this function,
+ *		  the caller should not modify this value.
+ *
+ * Returns the next component in the hash table.  This value should be
+ * passed into the next call to fmt_nextcomp().  Returns NULL at the end
+ * of the hash table.
+ */
+
+struct comp *fmt_nextcomp(struct comp *comp, unsigned int *bucket);
+
 /*
  * The implementation of the %(formataddr) function.  This is available for
  * programs to provide their own local implementation if they wish to do