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cmdutils: split parse_option().

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Separate the code that searches for the option to use and the code that
actually writes it. The writing code will be reused by the new options
parser.
This commit is contained in:
Anton Khirnov 2012-06-10 17:57:52 +02:00
parent 10bca66101
commit a01c02bcff
1 changed files with 40 additions and 30 deletions
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70
cmdutils.c
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@ -228,36 +228,14 @@ static inline void prepare_app_arguments(int *argc_ptr, char ***argv_ptr)
} }
#endif /* HAVE_COMMANDLINETOARGVW */ #endif /* HAVE_COMMANDLINETOARGVW */
int parse_option(void *optctx, const char *opt, const char *arg, static int write_option(void *optctx, const OptionDef *po, const char *opt,
const OptionDef *options) const char *arg)
{ {
const OptionDef *po;
int bool_val = 1;
int *dstcount;
void *dst;
po = find_option(options, opt);
if (!po->name && opt[0] == 'n' && opt[1] == 'o') {
/* handle 'no' bool option */
po = find_option(options, opt + 2);
if ((po->name && (po->flags & OPT_BOOL)))
bool_val = 0;
}
if (!po->name)
po = find_option(options, "default");
if (!po->name) {
av_log(NULL, AV_LOG_ERROR, "Unrecognized option '%s'\n", opt);
return AVERROR(EINVAL);
}
if (po->flags & HAS_ARG && !arg) {
av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'\n", opt);
return AVERROR(EINVAL);
}
/* new-style options contain an offset into optctx, old-style address of /* new-style options contain an offset into optctx, old-style address of
* a global var*/ * a global var*/
dst = po->flags & (OPT_OFFSET | OPT_SPEC) ? (uint8_t *)optctx + po->u.off void *dst = po->flags & (OPT_OFFSET | OPT_SPEC) ?
: po->u.dst_ptr; (uint8_t *)optctx + po->u.off : po->u.dst_ptr;
int *dstcount;
if (po->flags & OPT_SPEC) { if (po->flags & OPT_SPEC) {
SpecifierOpt **so = dst; SpecifierOpt **so = dst;
@ -274,9 +252,7 @@ int parse_option(void *optctx, const char *opt, const char *arg,
str = av_strdup(arg); str = av_strdup(arg);
av_freep(dst); av_freep(dst);
*(char **)dst = str; *(char **)dst = str;
} else if (po->flags & OPT_BOOL) { } else if (po->flags & OPT_BOOL || po->flags & OPT_INT) {
*(int *)dst = bool_val;
} else if (po->flags & OPT_INT) {
*(int *)dst = parse_number_or_die(opt, arg, OPT_INT64, INT_MIN, INT_MAX); *(int *)dst = parse_number_or_die(opt, arg, OPT_INT64, INT_MIN, INT_MAX);
} else if (po->flags & OPT_INT64) { } else if (po->flags & OPT_INT64) {
*(int64_t *)dst = parse_number_or_die(opt, arg, OPT_INT64, INT64_MIN, INT64_MAX); *(int64_t *)dst = parse_number_or_die(opt, arg, OPT_INT64, INT64_MIN, INT64_MAX);
@ -296,6 +272,40 @@ int parse_option(void *optctx, const char *opt, const char *arg,
} }
if (po->flags & OPT_EXIT) if (po->flags & OPT_EXIT)
exit(0); exit(0);
return 0;
}
int parse_option(void *optctx, const char *opt, const char *arg,
const OptionDef *options)
{
const OptionDef *po;
int ret;
po = find_option(options, opt);
if (!po->name && opt[0] == 'n' && opt[1] == 'o') {
/* handle 'no' bool option */
po = find_option(options, opt + 2);
if ((po->name && (po->flags & OPT_BOOL)))
arg = "0";
} else if (po->flags & OPT_BOOL)
arg = "1";
if (!po->name)
po = find_option(options, "default");
if (!po->name) {
av_log(NULL, AV_LOG_ERROR, "Unrecognized option '%s'\n", opt);
return AVERROR(EINVAL);
}
if (po->flags & HAS_ARG && !arg) {
av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'\n", opt);
return AVERROR(EINVAL);
}
ret = write_option(optctx, po, opt, arg);
if (ret < 0)
return ret;
return !!(po->flags & HAS_ARG); return !!(po->flags & HAS_ARG);
} }