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Impl flag_desc, to get the description of a flag, similar to flag_name #18

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Impl flag_desc, to get the description of a flag, similar to flag_name #18

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21 changes: 21 additions & 0 deletions flag.h
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Original file line number Diff line number Diff line change
Expand Up @@ -99,6 +99,7 @@ typedef struct {
/// API that operate on implicit global flag context

char *flag_name(void *val);
char *flag_desc(void *val);

bool *flag_bool(const char *name, bool def, const char *desc);
void flag_bool_var(bool *var, const char *name, bool def, const char *desc);
Expand Down Expand Up @@ -147,6 +148,7 @@ void flag_print_options(FILE *stream);
void *flag_c_new(const char *program_name);
void flag_c_free(void *c);
char *flag_c_name(void *c, void *val);
char *flag_c_desc(void *c, void *val);

bool *flag_c_bool(void *c, const char *name, bool def, const char *desc);
void flag_c_bool_var(void *c, bool *var, const char *name, bool def, const char *desc);
Expand Down Expand Up @@ -302,6 +304,25 @@ char *flag_c_name(void *c, void *val)
return NULL;
}

char *flag_desc(void *val)
{
return flag_c_desc(&flag_global_context, val);
}

char *flag_c_desc(void *c, void *val)
{
Flag_Context *fc = (Flag_Context*)c;

for (size_t i = 0; i < fc->flags_count; ++i) {
Flag *flag = &fc->flags[i];
if (flag__get_ref(flag) == val) {
return flag->desc;
}
}

return NULL;
}

bool *flag_c_bool(void *c, const char *name, bool def, const char *desc)
{
Flag *flag = flag__new_flag((Flag_Context*)c, FLAG_BOOL, name, desc);
Expand Down