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parse-opt: create parse_options_step. 

For now it's unable to stop at unknown options, this commit merely
reorganize some code around.

Signed-off-by: Pierre Habouzit <madcoder@debian.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Pierre Habouzit 2008-06-23 22:38:58 +02:00 committed by Junio C Hamano
parent ee68b87a62
commit ff43ec3e2d
2 changed files with 69 additions and 52 deletions
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117
parse-options.c
View File

@ -250,6 +250,58 @@ void parse_options_start(struct parse_opt_ctx_t *ctx,
ctx->flags = flags;
}
static int usage_with_options_internal(const char * const *,
const struct option *, int);
int parse_options_step(struct parse_opt_ctx_t *ctx,
const struct option *options,
const char * const usagestr[])
{
for (; ctx->argc; ctx->argc--, ctx->argv++) {
const char *arg = ctx->argv[0];
if (*arg != '-' || !arg[1]) {
if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)
break;
ctx->out[ctx->cpidx++] = ctx->argv[0];
continue;
}
if (arg[1] != '-') {
ctx->opt = arg + 1;
if (*ctx->opt == 'h')
return parse_options_usage(usagestr, options);
if (parse_short_opt(ctx, options) < 0)
usage_with_options(usagestr, options);
if (ctx->opt)
check_typos(arg + 1, options);
while (ctx->opt) {
if (*ctx->opt == 'h')
return parse_options_usage(usagestr, options);
if (parse_short_opt(ctx, options) < 0)
usage_with_options(usagestr, options);
}
continue;
}
if (!arg[2]) { /* "--" */
if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) {
ctx->argc--;
ctx->argv++;
}
break;
}
if (!strcmp(arg + 2, "help-all"))
return usage_with_options_internal(usagestr, options, 1);
if (!strcmp(arg + 2, "help"))
return parse_options_usage(usagestr, options);
if (parse_long_opt(ctx, arg + 2, options))
usage_with_options(usagestr, options);
}
return PARSE_OPT_DONE;
}
int parse_options_end(struct parse_opt_ctx_t *ctx)
{
memmove(ctx->out + ctx->cpidx, ctx->argv, ctx->argc * sizeof(*ctx->out));
@ -257,56 +309,19 @@ int parse_options_end(struct parse_opt_ctx_t *ctx)
return ctx->cpidx + ctx->argc;
}
static int usage_with_options_internal(const char * const *,
const struct option *, int, int);
int parse_options(int argc, const char **argv, const struct option *options,
const char * const usagestr[], int flags)
const char * const usagestr[], int flags)
{
struct parse_opt_ctx_t ctx;
parse_options_start(&ctx, argc, argv, flags);
for (; ctx.argc; ctx.argc--, ctx.argv++) {
const char *arg = ctx.argv[0];
if (*arg != '-' || !arg[1]) {
if (ctx.flags & PARSE_OPT_STOP_AT_NON_OPTION)
break;
ctx.out[ctx.cpidx++] = ctx.argv[0];
continue;
}
if (arg[1] != '-') {
ctx.opt = arg + 1;
if (*ctx.opt == 'h')
usage_with_options(usagestr, options);
if (parse_short_opt(&ctx, options) < 0)
usage_with_options(usagestr, options);
if (ctx.opt)
check_typos(arg + 1, options);
while (ctx.opt) {
if (*ctx.opt == 'h')
usage_with_options(usagestr, options);
if (parse_short_opt(&ctx, options) < 0)
usage_with_options(usagestr, options);
}
continue;
}
if (!arg[2]) { /* "--" */
if (!(ctx.flags & PARSE_OPT_KEEP_DASHDASH)) {
ctx.argc--;
ctx.argv++;
}
break;
}
if (!strcmp(arg + 2, "help-all"))
usage_with_options_internal(usagestr, options, 1, 1);
if (!strcmp(arg + 2, "help"))
usage_with_options(usagestr, options);
if (parse_long_opt(&ctx, arg + 2, options))
usage_with_options(usagestr, options);
switch (parse_options_step(&ctx, options, usagestr)) {
case PARSE_OPT_HELP:
exit(129);
case PARSE_OPT_DONE:
break;
default: /* PARSE_OPT_UNKNOWN */
abort(); /* unreached yet */
}
return parse_options_end(&ctx);
@ -316,7 +331,7 @@ int parse_options(int argc, const char **argv, const struct option *options,
#define USAGE_GAP 2
int usage_with_options_internal(const char * const *usagestr,
const struct option *opts, int full, int do_exit)
const struct option *opts, int full)
{
fprintf(stderr, "usage: %s\n", *usagestr++);
while (*usagestr && **usagestr)
@ -401,22 +416,20 @@ int usage_with_options_internal(const char * const *usagestr,
}
fputc('\n', stderr);
if (do_exit)
exit(129);
return PARSE_OPT_HELP;
}
void usage_with_options(const char * const *usagestr,
const struct option *opts)
const struct option *opts)
{
usage_with_options_internal(usagestr, opts, 0, 1);
exit(129); /* make gcc happy */
usage_with_options_internal(usagestr, opts, 0);
exit(129);
}
int parse_options_usage(const char * const *usagestr,
const struct option *opts)
{
return usage_with_options_internal(usagestr, opts, 0, 0);
return usage_with_options_internal(usagestr, opts, 0);
}

4
parse-options.h
View File

@ -133,6 +133,10 @@ extern int parse_options_usage(const char * const *usagestr,
extern void parse_options_start(struct parse_opt_ctx_t *ctx,
int argc, const char **argv, int flags);
extern int parse_options_step(struct parse_opt_ctx_t *ctx,
const struct option *options,
const char * const usagestr[]);
extern int parse_options_end(struct parse_opt_ctx_t *ctx);