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common: Add function parse_debug_flag

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* common/miscellaneous.c (parse_debug_flag): New.
* common/util.h (struct debug_flags_s): New.

Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2015-06-22 20:54:23 +02:00
parent d37f47081d
commit 22147952b7
No known key found for this signature in database
GPG Key ID: E3FDFF218E45B72B
2 changed files with 89 additions and 0 deletions
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81
common/miscellaneous.c
View File

@ -29,6 +29,7 @@
#include <config.h>
#include <stdlib.h>
#include <limits.h>
#include <errno.h>
#include "util.h"
@ -394,3 +395,83 @@ gnupg_compare_version (const char *a, const char *b)
&& a_micro == b_micro
&& strcmp (a_plvl, b_plvl) >= 0));
}
/* Parse an --debug style argument. We allow the use of number values
* in the usual C notation or a string with comma separated keywords.
*
* Returns: 0 on success or -1 and ERRNO set on error. On success the
* supplied variable is updated by the parsed flags.
*
* If STRING is NULL the enabled debug flags are printed.
*/
int
parse_debug_flag (const char *string, unsigned int *debugvar,
const struct debug_flags_s *flags)
{
unsigned long result = 0;
int i, j;
if (!string)
{
if (debugvar)
{
log_info ("enabled debug flags:");
for (i=0; flags[i].name; i++)
if ((*debugvar & flags[i].flag))
log_printf (" %s", flags[i].name);
log_printf ("\n");
}
return 0;
}
while (spacep (string))
string++;
if (*string == '-')
{
errno = EINVAL;
return -1;
}
if (!strcmp (string, "?") || !strcmp (string, "help"))
{
log_info ("available debug flags:\n");
for (i=0; flags[i].name; i++)
log_info (" %5u %s\n", flags[i].flag, flags[i].name);
exit (0);
}
else if (digitp (string))
{
errno = 0;
result = strtoul (string, NULL, 0);
if (result == ULONG_MAX && errno == ERANGE)
return -1;
}
else
{
char **words;
words = strtokenize (string, ",");
if (!words)
return -1;
for (i=0; words[i]; i++)
{
if (*words[i])
{
for (j=0; flags[j].name; j++)
if (!strcmp (words[i], flags[j].name))
{
result |= flags[j].flag;
break;
}
if (!flags[j].name)
log_info (_("unknown debug flag '%s' ignored\n"), words[i]);
}
}
xfree (words);
}
*debugvar |= result;
return 0;
}

8
common/util.h
View File

@ -389,6 +389,14 @@ int match_multistr (const char *multistr,const char *match);
int gnupg_compare_version (const char *a, const char *b);
struct debug_flags_s
{
unsigned int flag;
const char *name;
};
int parse_debug_flag (const char *string, unsigned int *debugvar,
const struct debug_flags_s *flags);
/*-- Simple replacement functions. */