format-perl-brace.c [plain text]
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include "format.h"
#include "xalloc.h"
#include "error.h"
#include "error-progname.h"
#include "gettext.h"
#define _(str) gettext (str)
struct named_arg
{
char *name;
};
struct spec
{
unsigned int directives;
unsigned int named_arg_count;
unsigned int allocated;
struct named_arg *named;
};
static int
named_arg_compare (const void *p1, const void *p2)
{
return strcmp (((const struct named_arg *) p1)->name,
((const struct named_arg *) p2)->name);
}
static void *
format_parse (const char *format, char **invalid_reason)
{
struct spec spec;
struct spec *result;
spec.directives = 0;
spec.named_arg_count = 0;
spec.allocated = 0;
spec.named = NULL;
for (; *format != '\0';)
if (*format++ == '{')
{
const char *f = format;
char c;
c = *f;
if ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || c == '_')
{
do
c = *++f;
while ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || c == '_'
|| (c >= '0' && c <= '9'));
if (c == '}')
{
char *name;
const char *name_start = format;
const char *name_end = f;
size_t n = name_end - name_start;
name = (char *) xmalloc (n + 1);
memcpy (name, name_start, n);
name[n] = '\0';
spec.directives++;
if (spec.allocated == spec.named_arg_count)
{
spec.allocated = 2 * spec.allocated + 1;
spec.named = (struct named_arg *) xrealloc (spec.named, spec.allocated * sizeof (struct named_arg));
}
spec.named[spec.named_arg_count].name = name;
spec.named_arg_count++;
format = ++f;
}
}
}
if (spec.named_arg_count > 1)
{
unsigned int i, j;
qsort (spec.named, spec.named_arg_count, sizeof (struct named_arg),
named_arg_compare);
for (i = j = 0; i < spec.named_arg_count; i++)
if (j > 0 && strcmp (spec.named[i].name, spec.named[j-1].name) == 0)
free (spec.named[i].name);
else
{
if (j < i)
spec.named[j].name = spec.named[i].name;
j++;
}
spec.named_arg_count = j;
}
result = (struct spec *) xmalloc (sizeof (struct spec));
*result = spec;
return result;
}
static void
format_free (void *descr)
{
struct spec *spec = (struct spec *) descr;
if (spec->named != NULL)
{
unsigned int i;
for (i = 0; i < spec->named_arg_count; i++)
free (spec->named[i].name);
free (spec->named);
}
free (spec);
}
static int
format_get_number_of_directives (void *descr)
{
struct spec *spec = (struct spec *) descr;
return spec->directives;
}
static bool
format_check (const lex_pos_ty *pos, void *msgid_descr, void *msgstr_descr,
bool equality, bool noisy, const char *pretty_msgstr)
{
struct spec *spec1 = (struct spec *) msgid_descr;
struct spec *spec2 = (struct spec *) msgstr_descr;
bool err = false;
if (spec1->named_arg_count + spec2->named_arg_count > 0)
{
unsigned int i, j;
unsigned int n1 = spec1->named_arg_count;
unsigned int n2 = spec2->named_arg_count;
for (i = 0, j = 0; i < n1 || j < n2; )
{
int cmp = (i >= n1 ? 1 :
j >= n2 ? -1 :
strcmp (spec1->named[i].name, spec2->named[j].name));
if (cmp > 0)
j++;
else if (cmp < 0)
{
if (equality)
{
if (noisy)
{
error_with_progname = false;
error_at_line (0, 0, pos->file_name, pos->line_number,
_("a format specification for argument '%s' doesn't exist in '%s'"),
spec1->named[i].name, pretty_msgstr);
error_with_progname = true;
}
err = true;
break;
}
else
i++;
}
else
j++, i++;
}
}
return err;
}
struct formatstring_parser formatstring_perl_brace =
{
format_parse,
format_free,
format_get_number_of_directives,
format_check
};
#ifdef TEST
#include <stdio.h>
#include "getline.h"
static void
format_print (void *descr)
{
struct spec *spec = (struct spec *) descr;
unsigned int i;
if (spec == NULL)
{
printf ("INVALID");
return;
}
printf ("{");
for (i = 0; i < spec->named_arg_count; i++)
{
if (i > 0)
printf (", ");
printf ("'%s'", spec->named[i].name);
}
printf ("}");
}
int
main ()
{
for (;;)
{
char *line = NULL;
size_t line_size = 0;
int line_len;
char *invalid_reason;
void *descr;
line_len = getline (&line, &line_size, stdin);
if (line_len < 0)
break;
if (line_len > 0 && line[line_len - 1] == '\n')
line[--line_len] = '\0';
invalid_reason = NULL;
descr = format_parse (line, &invalid_reason);
format_print (descr);
printf ("\n");
if (descr == NULL)
printf ("%s\n", invalid_reason);
free (invalid_reason);
free (line);
}
return 0;
}
#endif