SYSV-style form library; from ncurses

1 files changed, 131 insertions, 0 deletions

diff --git a/lib/libform/fty_alpha.c b/lib/libform/fty_alpha.c
new file mode 100644
index 00000000000..9471f122357
--- /dev/null
+++ b/lib/libform/fty_alpha.c
@@ -0,0 +1,131 @@
+
+/*
+ * THIS CODE IS SPECIFICALLY EXEMPTED FROM THE NCURSES PACKAGE COPYRIGHT.
+ * You may freely copy it for use as a template for your own field types.
+ * If you develop a field type that might be of general use, please send
+ * it back to the ncurses maintainers for inclusion in the next version.
+ */
+
+#include "form.priv.h"
+
+typedef struct {
+  int width;
+} alphaARG;
+
+/*---------------------------------------------------------------------------
+|   Facility      :  libnform  
+|   Function      :  static void *Make_Alpha_Type(va_list *ap)
+|   
+|   Description   :  Allocate structure for alpha type argument.
+|
+|   Return Values :  Pointer to argument structure or NULL on error
++--------------------------------------------------------------------------*/
+static void *Make_Alpha_Type(va_list * ap)
+{
+  alphaARG *argp = (alphaARG *)malloc(sizeof(alphaARG));
+  if (argp)
+    {
+      argp->width = va_arg(*ap,int);
+    }
+  return ((void *)argp);
+}
+
+/*---------------------------------------------------------------------------
+|   Facility      :  libnform  
+|   Function      :  static void *Copy_Alpha_Type(const void * argp)
+|   
+|   Description   :  Copy structure for alpha type argument.  
+|
+|   Return Values :  Pointer to argument structure or NULL on error.
++--------------------------------------------------------------------------*/
+static void *Copy_Alpha_Type(const void * argp)
+{
+  alphaARG *ap  = (alphaARG *)argp;
+  alphaARG *new = (alphaARG *)malloc(sizeof(alphaARG));
+  
+  if (new)
+    {
+      *new = *ap;
+    }
+  return ((void *)new);
+}
+
+/*---------------------------------------------------------------------------
+|   Facility      :  libnform  
+|   Function      :  static void Free_Alpha_Type( void * argp )
+|   
+|   Description   :  Free structure for alpha type argument.
+|
+|   Return Values :  -
++--------------------------------------------------------------------------*/
+static void Free_Alpha_Type(void * argp)
+{
+  if (argp) 
+    free(argp);
+}
+
+/*---------------------------------------------------------------------------
+|   Facility      :  libnform  
+|   Function      :  static bool Check_Alpha_Field(
+|                                      FIELD * field,
+|                                      const void * argp)
+|   
+|   Description   :  Validate buffer content to be a valid alpha value
+|
+|   Return Values :  TRUE  - field is valid
+|                    FALSE - field is invalid
++--------------------------------------------------------------------------*/
+static bool Check_Alpha_Field(FIELD * field, const void * argp)
+{
+  int width = ((alphaARG *)argp)->width;
+  unsigned char *bp  = (unsigned char *)field_buffer(field,0);
+  int  l = -1;
+  unsigned char *s;
+
+  while(*bp && *bp==' ') 
+    bp++;
+  if (*bp)
+    {
+      s = bp;
+      while(*bp && isalpha(*bp)) 
+	bp++;
+      l = (int)(bp-s);
+      while(*bp && *bp==' ') 
+	bp++;
+    }
+  return ((*bp || (l < width)) ? FALSE : TRUE);
+}
+
+/*---------------------------------------------------------------------------
+|   Facility      :  libnform  
+|   Function      :  static bool Check_Alpha_Character(
+|                                      int c,
+|                                      const void * argp)
+|   
+|   Description   :  Check a character for the alpha type.
+|
+|   Return Values :  TRUE  - character is valid
+|                    FALSE - character is invalid
++--------------------------------------------------------------------------*/
+static bool Check_Alpha_Character(int c, const void * argp)
+{
+  return (isalpha(c) ? TRUE : FALSE);
+}
+
+static FIELDTYPE typeALPHA = {
+  _HAS_ARGS | _RESIDENT,
+  1,                           /* this is mutable, so we can't be const */
+  (FIELDTYPE *)0,
+  (FIELDTYPE *)0,
+  Make_Alpha_Type,
+  Copy_Alpha_Type,
+  Free_Alpha_Type,
+  Check_Alpha_Field,
+  Check_Alpha_Character,
+  NULL,
+  NULL
+};
+
+FIELDTYPE* TYPE_ALPHA = &typeALPHA;
+
+/* fty_alpha.c ends here */