Changeset 27368 for branches/eam_branches/largefiles.20100314/Ohana/src/libfits/header/F_modify.c

Timestamp:

Mar 19, 2010, 5:35:25 PM (16 years ago)

Author:

eugene

Message:

update ohana formatting functions to check format and associated types; fixes derived from format checks

File:

• branches/eam_branches/largefiles.20100314/Ohana/src/libfits/header/F_modify.c (modified) (4 diffs)

branches/eam_branches/largefiles.20100314/Ohana/src/libfits/header/F_modify.c

@@ -2 +2 @@
 # include <gfitsio.h>
 
+// this is only valid for the regular and non-boolean fields
 int gfits_modify (Header *header, char *field, char *mode, int N,...) {
   
@@ -8 +9 @@
 
   char comment[82], string[82], data[82];
-  char *p, *qs, *qe;
+  char *p, *qe;
   va_list argp;
   
@@ -66 +67 @@
   if (!strcmp (mode, "%lg"))  snprintf (string, 81, "%-8s= %20.10G / %-s ", field, va_arg (argp, double),             comment); 
 
+  /* string value.  Quotes must be at least 18 chars apart */
+  if (!strcmp (mode, "%s")) {
+    strncpy (data, va_arg (argp, char *), 68);
+    snprintf (string, 81, "%-8s= '%-18s' / %-s ", field, data, comment);
+  }
+
+  strncpy (p, string, 80);
+  va_end (argp);
+  return (TRUE);
+
+}
+
+// alternate version for the special types (boolean, comments, COMMENT)
+int gfits_modify_alt (Header *header, char *field, char *mode, int N,...) {
+  
+  /* this function expects one more argument, the value to be written */
+  /* this function is extremely similar to gfits_print, except it allows for changing an existing field. */
+
+  char comment[82], string[82], data[82];
+  char *p, *qs, *qe;
+  va_list argp;
+  
+  va_start (argp, N);
+  bzero (data, 82);
+  bzero (string, 82);
+  bzero (comment, 82);
+
+  if (mode[0] != '%') {
+    fprintf (stderr, "gfits_print: weird mode:  %s\n", mode);
+    return (FALSE);
+  }
+
+  /* find location of desired entry */
+  p = gfits_header_field (header, field, N);
+  if (p == NULL)  {
+    /* new entry, find the END of the header */
+    p = gfits_header_field (header, "END", 1);
+    if (p == NULL) return (FALSE); 
+    
+    /* is there enough space for 1 more line? */
+    if (header[0].datasize - (p - (header[0].buffer)) < 2*FT_LINE_LENGTH) {
+      header[0].datasize += FT_RECORD_SIZE;
+      REALLOCATE (header[0].buffer, char, header[0].datasize);
+      p = gfits_header_field (header, "END", 1);
+      if (p == NULL) return (FALSE); 
+      memset (p + FT_LINE_LENGTH, ' ', FT_RECORD_SIZE);
+    }
+    
+    /* push END line back 1 */
+    memmove ((p + FT_LINE_LENGTH), p, FT_LINE_LENGTH);
+    memset (p, ' ', FT_LINE_LENGTH);
+  } else {
+    /* old entry, save the comment region (is this skipping a character for non-strings?) */
+    qe = gfits_keyword_end (p);
+    qe += 3;
+    qe = MIN (p + 80, qe);
+    strncpy (comment, qe, p + 80 - qe);
+  }
+  gfits_pad_ending (comment, ' ', 82);  /* comment must contain spaces to the end */
+
   /* write the boolean mode */
   if (!strcmp (mode, "%t")) {
@@ -72 +133 @@
     else
       snprintf (string, 81, "%-8s= %18s F / %-s ", field, " ", comment);
-  }
-
-  /* string value.  Quotes must be at least 18 chars apart */
-  if (!strcmp (mode, "%s")) {
-    strncpy (data, va_arg (argp, char *), 68);
-    snprintf (string, 81, "%-8s= '%-18s' / %-s ", field, data, comment);
   }