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143 lines
3.3 KiB
143 lines
3.3 KiB
#include "utils.h"
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#include <bitcoin/chainparams.h>
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#include <ccan/list/list.h>
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#include <ccan/str/hex/hex.h>
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#include <ccan/tal/str/str.h>
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#include <locale.h>
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secp256k1_context *secp256k1_ctx;
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const tal_t *tmpctx;
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const struct chainparams *chainparams;
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bool is_elements(const struct chainparams *chainparams)
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{
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return chainparams->is_elements;
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}
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#if DEVELOPER
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/* If you've got a softref, we assume no reallocs. */
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static void dont_move_softref(tal_t *ctx, enum tal_notify_type ntype, void *info)
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{
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abort();
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}
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#endif
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static void softref_nullify(tal_t *obj, void **ptr)
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{
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*ptr = NULL;
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#if DEVELOPER
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tal_del_notifier(obj, dont_move_softref);
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#endif
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}
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static void softref_cleanup(const tal_t *outer, void **ptr)
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{
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if (*ptr) {
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tal_del_destructor2(*ptr, softref_nullify, ptr);
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}
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#if DEVELOPER
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tal_del_notifier(outer, dont_move_softref);
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#endif
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}
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void set_softref_(const tal_t *outer, size_t outersize, void **ptr, tal_t *obj)
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{
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/* pointer is inside outer, right? */
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assert((char *)ptr >= (char *)outer);
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assert((char *)ptr < (char *)outer + outersize);
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/* This is harmless if there was no prior, otherwise constrains the
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* leak: we don't have enough information in softref_nullify to
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* clear softref_cleanup */
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tal_del_destructor2(outer, softref_cleanup, ptr);
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if (obj) {
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tal_add_destructor2(outer, softref_cleanup, ptr);
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tal_add_destructor2(obj, softref_nullify, ptr);
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#if DEVELOPER
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tal_add_notifier(obj, TAL_NOTIFY_MOVE, dont_move_softref);
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#endif
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}
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#if DEVELOPER
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tal_add_notifier(outer, TAL_NOTIFY_MOVE, dont_move_softref);
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#endif
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*ptr = obj;
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}
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void clear_softref_(const tal_t *outer, size_t outersize, void **ptr)
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{
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assert((char *)ptr >= (char *)outer);
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assert((char *)ptr < (char *)outer + outersize);
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if (*ptr) {
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tal_del_destructor2(outer, softref_cleanup, ptr);
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tal_del_destructor2(*ptr, softref_nullify, ptr);
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#if DEVELOPER
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tal_del_notifier(*ptr, dont_move_softref);
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#endif
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}
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#if DEVELOPER
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tal_del_notifier(outer, dont_move_softref);
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#endif
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*ptr = NULL;
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}
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char *tal_hexstr(const tal_t *ctx, const void *data, size_t len)
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{
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char *str = tal_arr(ctx, char, hex_str_size(len));
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hex_encode(data, len, str, hex_str_size(len));
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return str;
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}
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char *tal_hex(const tal_t *ctx, const tal_t *data)
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{
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return tal_hexstr(ctx, data, tal_bytelen(data));
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}
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u8 *tal_hexdata(const tal_t *ctx, const void *str, size_t len)
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{
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u8 *data = tal_arr(ctx, u8, hex_data_size(len));
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if (!hex_decode(str, len, data, hex_data_size(len)))
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return NULL;
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return data;
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}
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/* Use the POSIX C locale. */
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void setup_locale(void)
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{
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setlocale(LC_ALL, "C");
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putenv("LC_ALL=C"); /* For exec{l,lp,v,vp}(...) */
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}
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/* Initial creation of tmpctx. */
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void setup_tmpctx(void)
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{
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tmpctx = tal_arr_label(NULL, char, 0, "tmpctx");
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}
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/* Free any children of tmpctx. */
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void clean_tmpctx(void)
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{
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const tal_t *p;
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/* Don't actually free tmpctx: we hand pointers to it around. */
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while ((p = tal_first(tmpctx)) != NULL)
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tal_free(p);
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}
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void tal_arr_remove_(void *p, size_t elemsize, size_t n)
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{
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// p is a pointer-to-pointer for tal_resize.
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char *objp = *(char **)p;
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size_t len = tal_bytelen(objp);
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assert(len % elemsize == 0);
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assert((n + 1) * elemsize <= len);
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memmove(objp + elemsize * n, objp + elemsize * (n+1),
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len - (elemsize * (n+1)));
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tal_resize((char **)p, len - elemsize);
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}
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