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[collection4.git] / src / utils_array.c

diff --git a/src/utils_array.c b/src/utils_array.c
new file mode 100644 (file)
index 0000000..5aaabbc
--- /dev/null
+++ b/src/utils_array.c
@@ -0,0 +1,95 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include <errno.h>
+
+#include "utils_array.h"
+
+struct str_array_s
+{
+  char **ptr;
+  size_t size;
+};
+
+str_array_t *array_create (void) /* {{{ */
+{
+  str_array_t *a;
+
+  a = malloc (sizeof (*a));
+  if (a == NULL)
+    return (NULL);
+
+  memset (a, 0, sizeof (*a));
+  a->ptr = NULL;
+  a->size = 0;
+
+  return (a);
+} /* }}} str_array_t *array_create */
+
+void array_destroy (str_array_t *a) /* {{{ */
+{
+  if (a == NULL)
+    return;
+
+  free (a->ptr);
+  a->ptr = NULL;
+  a->size = 0;
+
+  free (a);
+} /* }}} void array_destroy */
+
+int array_append (str_array_t *a, const char *entry) /* {{{ */
+{
+  char **ptr;
+
+  if ((entry == NULL) || (a == NULL))
+    return (EINVAL);
+
+  ptr = realloc (a->ptr, sizeof (*a->ptr) * (a->size + 1));
+  if (ptr == NULL)
+    return (ENOMEM);
+  a->ptr = ptr;
+  ptr = a->ptr + a->size;
+
+  *ptr = strdup (entry);
+  if (*ptr == NULL)
+    return (ENOMEM);
+
+  a->size++;
+  return (0);
+} /* }}} int array_append */
+
+int array_append_format (str_array_t *a, const char *format, ...) /* {{{ */
+{
+  char buffer[1024];
+  va_list ap;
+  int status;
+
+  va_start (ap, format);
+  status = vsnprintf (buffer, sizeof (buffer), format, ap);
+  va_end(ap);
+
+  if ((status < 0) || (((size_t) status) >= sizeof (buffer)))
+    return (ENOMEM);
+
+  return (array_append (a, buffer));
+} /* }}} int array_append_format */
+
+int array_argc (str_array_t *a) /* {{{ */
+{
+  if (a == NULL)
+    return (-1);
+
+  return ((int) a->size);
+} /* }}} int array_argc */
+
+char **array_argv (str_array_t *a) /* {{{ */
+{
+  if ((a == NULL) || (a->size == 0))
+    return (NULL);
+
+  return (a->ptr);
+} /* }}} char **array_argv */
+
+/* vim: set sw=2 sts=2 et fdm=marker : */