Merge branch 'debian'

[hcoop/debian/courier-authlib.git] / libs / unicode / unicodebuf.c

diff --git a/libs/unicode/unicodebuf.c b/libs/unicode/unicodebuf.c
new file mode 100644 (file)
index 0000000..66687c3
--- /dev/null
+++ b/libs/unicode/unicodebuf.c
@@ -0,0 +1,127 @@
+/*
+** Copyright 2011 Double Precision, Inc.
+** See COPYING for distribution information.
+**
+*/
+
+#include       "unicode_config.h"
+#include       "unicode.h"
+#include       <stdlib.h>
+#include       <string.h>
+
+void unicode_buf_init(struct unicode_buf *p, size_t max)
+{
+       p->ptr=0;
+       p->size=0;
+       p->len=0;
+       p->max=max;
+}
+
+void unicode_buf_deinit(struct unicode_buf *p)
+{
+       if (p->ptr)
+               free(p->ptr);
+}
+
+int unicode_buf_append(struct unicode_buf *p,
+                      const unicode_char *uc, size_t l)
+{
+       if (l > p->max-p->len)
+               l=p->max-p->len;
+
+       if (p->len + l > p->size)
+       {
+               size_t n=(p->len + l) * 2;
+               unicode_char *newp;
+
+               if (n < 256)
+                       n=256;
+
+               if (n > p->max)
+                       n=p->max;
+
+               newp=p->ptr ? realloc(p->ptr, n * sizeof(unicode_char))
+                       : malloc(n * sizeof(unicode_char));
+
+               if (!newp)
+                       return -1;
+
+               p->ptr=newp;
+               p->size=n;
+       }
+
+       memcpy(p->ptr + p->len, uc, l * sizeof(unicode_char));
+
+       p->len += l;
+       return 0;
+}
+
+void unicode_buf_append_char(struct unicode_buf *dst,
+                            const char *str,
+                            size_t cnt)
+{
+       unicode_char unicode_buf[256];
+
+       while (cnt)
+       {
+               size_t n=sizeof(unicode_buf)/sizeof(unicode_buf[0]), i;
+
+               if (n > cnt)
+                       n=cnt;
+
+               for (i=0; i<n; ++i)
+                       unicode_buf[i]=(unsigned char)str[i];
+
+               str += n;
+               cnt -= n;
+               unicode_buf_append(dst, unicode_buf, i);
+       }
+}
+
+void unicode_buf_remove(struct unicode_buf *p,
+                       size_t pos,
+                       size_t cnt)
+{
+       if (pos > p->len)
+               pos=p->len;
+
+       if (cnt > p->len-pos)
+               cnt=p->len-pos;
+
+       if (cnt)
+               memmove(p->ptr+pos+cnt, p->ptr+pos, p->len-pos-cnt);
+       p->len -= cnt;
+}
+
+int unicode_buf_cmp(const struct unicode_buf *a,
+                   const struct unicode_buf *b)
+{
+       size_t i;
+
+       for (i=0; i<a->len && i<b->len; i++)
+       {
+               if (a->ptr[i] < b->ptr[i])
+                       return -1;
+               if (a->ptr[i] > b->ptr[i])
+                       return 1;
+       }
+
+       return (a->len < b->len ? -1:a->len > b->len ? 1:0);
+}
+
+int unicode_buf_cmp_str(const struct unicode_buf *p, const char *c,
+                       size_t cl)
+{
+       size_t i;
+
+       for (i=0; i<p->len && i < cl; ++i)
+       {
+               if (p->ptr[i] < c[i])
+                       return -1;
+
+               if (p->ptr[i] > c[i])
+                       return 1;
+       }
+
+       return (p->len < cl ? -1: p->len > cl ? 1:0);
+}