{
segm_literal, /* Literal segment */
segm_backref, /* Back-reference segment */
+ segm_case_ctl /* Case control segment (GNU extension) */
+ };
+
+enum case_ctl_type
+ {
+ ctl_stop, /* Stop case conversion */
+ ctl_upcase_next,/* Turn the next character to uppercase */
+ ctl_locase_next,/* Turn the next character to lowercase */
+ ctl_upcase, /* Turn the replacement to uppercase until ctl_stop */
+ ctl_locase /* Turn the replacement to lowercase until ctl_stop */
};
struct replace_segm
{
char *ptr;
size_t size;
- } literal;
- size_t ref;
+ } literal; /* type == segm_literal */
+ size_t ref; /* type == segm_backref */
+ enum case_ctl_type ctl; /* type == segm_case_ctl */
} v;
};
+/* Compiled replacement expression */
static struct replace_segm *repl_head, *repl_tail;
-static segm_count;
+static segm_count; /* Number of elements in the above list */
static struct replace_segm *
add_segment (void)
segm->v.ref = ref;
}
+static void
+add_case_ctl_segment (enum case_ctl_type ctl)
+{
+ struct replace_segm *segm = add_segment ();
+ segm->type = segm_case_ctl;
+ segm->v.ctl = ctl;
+}
+
void
set_transform_expr (const char *expr)
{
add_char_segment ('&');
cur++;
break;
-
+
+ case 'L':
+ /* Turn the replacement to lowercase until a `\U' or `\E'
+ is found, */
+ add_case_ctl_segment (ctl_locase);
+ cur++;
+ break;
+
+ case 'l':
+ /* Turn the next character to lowercase, */
+ add_case_ctl_segment (ctl_locase_next);
+ cur++;
+ break;
+
+ case 'U':
+ /* Turn the replacement to uppercase until a `\L' or `\E'
+ is found, */
+ add_case_ctl_segment (ctl_upcase);
+ cur++;
+ break;
+
+ case 'u':
+ /* Turn the next character to uppercase, */
+ add_case_ctl_segment (ctl_upcase_next);
+ cur++;
+ break;
+
+ case 'E':
+ /* Stop case conversion started by `\L' or `\U'. */
+ add_case_ctl_segment (ctl_stop);
+ cur++;
+ break;
+
default:
/* Try to be nice */
{
}
+/* Run case conversion specified by CASE_CTL on array PTR of SIZE
+ characters. Returns pointer to statically allocated storage. */
+static char *
+run_case_conv (enum case_ctl_type case_ctl, char *ptr, size_t size)
+{
+ static char *case_ctl_buffer;
+ static size_t case_ctl_bufsize;
+ char *p;
+
+ if (case_ctl_bufsize < size)
+ {
+ case_ctl_bufsize = size;
+ case_ctl_buffer = xrealloc (case_ctl_buffer, case_ctl_bufsize);
+ }
+ memcpy (case_ctl_buffer, ptr, size);
+ switch (case_ctl)
+ {
+ case ctl_upcase_next:
+ case_ctl_buffer[0] = toupper (case_ctl_buffer[0]);
+ break;
+
+ case ctl_locase_next:
+ case_ctl_buffer[0] = tolower (case_ctl_buffer[0]);
+ break;
+
+ case ctl_upcase:
+ for (p = case_ctl_buffer; p < case_ctl_buffer + size; p++)
+ *p = toupper (*p);
+ break;
+
+ case ctl_locase:
+ for (p = case_ctl_buffer; p < case_ctl_buffer + size; p++)
+ *p = tolower (*p);
+ break;
+
+ case ctl_stop:
+ break;
+ }
+ return case_ctl_buffer;
+}
+
bool
_transform_name_to_obstack (char *input)
{
regmatch_t *rmp;
char *p;
int rc;
+ enum case_ctl_type case_ctl = ctl_stop, /* Current case conversion op */
+ save_ctl = ctl_stop; /* Saved case_ctl for \u and \l */
+
+ /* Reset case conversion after a single-char operation */
+#define CASE_CTL_RESET() if (case_ctl == ctl_upcase_next \
+ || case_ctl == ctl_locase_next) \
+ { \
+ case_ctl = save_ctl; \
+ save_ctl = ctl_stop; \
+ }
if (transform_type == transform_none)
return false;
while (*input)
{
size_t disp;
+ char *ptr;
rc = regexec (®ex, input, regex.re_nsub + 1, rmp, 0);
if (rc == 0)
{
struct replace_segm *segm;
-
+
disp = rmp[0].rm_eo;
if (rmp[0].rm_so)
switch (segm->type)
{
case segm_literal: /* Literal segment */
- obstack_grow (&stk, segm->v.literal.ptr,
- segm->v.literal.size);
+ if (case_ctl == ctl_stop)
+ ptr = segm->v.literal.ptr;
+ else
+ {
+ ptr = run_case_conv (case_ctl,
+ segm->v.literal.ptr,
+ segm->v.literal.size);
+ CASE_CTL_RESET();
+ }
+ obstack_grow (&stk, ptr, segm->v.literal.size);
break;
case segm_backref: /* Back-reference segment */
if (rmp[segm->v.ref].rm_so != -1
&& rmp[segm->v.ref].rm_eo != -1)
- obstack_grow (&stk,
- input + rmp[segm->v.ref].rm_so,
- rmp[segm->v.ref].rm_eo - rmp[segm->v.ref].rm_so);
+ {
+ size_t size = rmp[segm->v.ref].rm_eo
+ - rmp[segm->v.ref].rm_so;
+ ptr = input + rmp[segm->v.ref].rm_so;
+ if (case_ctl != ctl_stop)
+ {
+ ptr = run_case_conv (case_ctl, ptr, size);
+ CASE_CTL_RESET();
+ }
+
+ obstack_grow (&stk, ptr, size);
+ }
break;
+
+ case segm_case_ctl:
+ switch (segm->v.ctl)
+ {
+ case ctl_upcase_next:
+ case ctl_locase_next:
+ switch (save_ctl)
+ {
+ case ctl_stop:
+ case ctl_upcase:
+ case ctl_locase:
+ save_ctl = case_ctl;
+ default:
+ break;
+ }
+ /*FALL THROUGH*/
+
+ case ctl_upcase:
+ case ctl_locase:
+ case ctl_stop:
+ case_ctl = segm->v.ctl;
+ }
}
}
}