X-Git-Url: https://diplodocus.org/git/nmh/blobdiff_plain/210b50a5ac585ae99db277fdae5638772df9c3d9..e605596f06f250775f89ddfe3f7f2c8fcfda1c4e:/sbr/m_getfld.c

diff --git a/sbr/m_getfld.c b/sbr/m_getfld.c
index 6804e58e..eb377411 100644
--- a/sbr/m_getfld.c
+++ b/sbr/m_getfld.c
@@ -60,10 +60,13 @@
 
    Usage
    =====
-   m_getfld_state_t gstate = 0;
-      ...
-   int state = m_getfld (&gstate, ...);
-      ...
+   m_getfld_state_t gstate;
+
+   gstate = m_getfld_state_init(mailfp);
+   Perhaps m_getfld_track_filepos2(&gstate);
+   ...
+      state = m_getfld2(&gstate, ...);
+      ...Repeat until finished with mailfp.
    m_getfld_state_destroy (&gstate);
 
    The state is retained internally by gstate.  To reset its state to FLD:
@@ -201,6 +204,7 @@
 /*
  * static prototypes
  */
+static void Ungetc(m_getfld_state_t s);
 static int m_Eom (m_getfld_state_t);
 
 #define eom(c,s)	(s->msg_style != MS_DEFAULT && \
@@ -305,13 +309,11 @@ struct m_getfld_state {
     int state;
 };
 
-static
-void
-m_getfld_state_init (m_getfld_state_t *gstate, FILE *iob) {
+m_getfld_state_t m_getfld_state_init(FILE *iob)
+{
     m_getfld_state_t s;
 
     NEW(s);
-    *gstate = s;
     s->readpos = s->end = s->msg_buf;
     s->bytes_read = s->total_bytes_read = 0;
     s->last_caller_pos = s->last_internal_pos = 0;
@@ -323,6 +325,8 @@ m_getfld_state_init (m_getfld_state_t *gstate, FILE *iob) {
     s->fdelimlen = s->edelimlen = 0;
     s->state = FLD;
     s->track_filepos = 0;
+
+    return s;
 }
 
 /* scan() needs to force an initial state of FLD for each message. */
@@ -339,12 +343,21 @@ m_getfld_state_reset (m_getfld_state_t *gstate) {
 void
 m_getfld_track_filepos (m_getfld_state_t *gstate, FILE *iob) {
     if (! *gstate) {
-	m_getfld_state_init (gstate, iob);
+	*gstate = m_getfld_state_init(iob);
     }
 
     (*gstate)->track_filepos = 1;
 }
 
+/* m_getfld_track_filepos() with the existing iob. */
+void m_getfld_track_filepos2(m_getfld_state_t *gstate)
+{
+    if (!*gstate)
+	adios(NULL, "m_getfld_track_filepos2 without gstate");
+
+    m_getfld_track_filepos(gstate, (*gstate)->iob);
+}
+
 void m_getfld_state_destroy (m_getfld_state_t *gstate) {
     m_getfld_state_t s = *gstate;
 
@@ -394,7 +407,7 @@ enter_getfld (m_getfld_state_t *gstate, FILE *iob) {
     off_t pos_movement;
 
     if (! *gstate) {
-	m_getfld_state_init (gstate, iob);
+	*gstate = m_getfld_state_init(iob);
     }
     s = *gstate;
     s->bytes_read = 0;
@@ -515,16 +528,17 @@ Getc (m_getfld_state_t s) {
     return (unsigned char)*s->readpos++;
 }
 
-/* Return the next character that would be read by Getc() without
- * consuming it, fetching more of the input for the buffer if required,
- * or EOF on end of file. */
+/* Return the next character that Getc() would return, which may be EOF. */
 static int
-Peek (m_getfld_state_t s) {
-    if ((s->end - s->readpos < 1 && read_more (s) == 0) ||
-        s->readpos >= s->end)
-        return EOF;
+Peek (m_getfld_state_t s)
+{
+    int c;
+
+    c = Getc(s);
+    if (c != EOF)
+        Ungetc(s);
 
-    return (unsigned char)*s->readpos;
+    return c;
 }
 
 /* If there's room, undo the consumption of one character from msg_buf,
@@ -829,6 +843,16 @@ m_getfld (m_getfld_state_t *gstate, char name[NAMESZ], char *buf, int *bufsz,
 }
 
 
+/* m_getfld() with the existing iob. */
+int m_getfld2(m_getfld_state_t *gstate, char name[NAMESZ], char *buf, int *bufsz)
+{
+    if (!*gstate)
+	adios(NULL, "m_getfld2 without gstate");
+
+    return m_getfld(gstate, name, buf, bufsz, (*gstate)->iob);
+}
+
+
 void
 m_unknown(m_getfld_state_t *gstate, FILE *iob)
 {
@@ -919,6 +943,16 @@ m_unknown(m_getfld_state_t *gstate, FILE *iob)
 }
 
 
+/* m_unknown() with the existing iob. */
+void m_unknown2(m_getfld_state_t *gstate)
+{
+    if (!*gstate)
+	adios(NULL, "m_unknown2 without gstate");
+
+    m_unknown(gstate, (*gstate)->iob);
+}
+
+
 /*
  * test for msg delimiter string
  */