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118 lines
4.0 KiB
118 lines
4.0 KiB
#ifndef LIGHTNING_COMMON_UTILS_H
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#define LIGHTNING_COMMON_UTILS_H
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#include "config.h"
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#include <ccan/crypto/ripemd160/ripemd160.h>
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#include <ccan/crypto/sha256/sha256.h>
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#include <ccan/short_types/short_types.h>
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#include <ccan/structeq/structeq.h>
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#include <ccan/tal/tal.h>
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#include <secp256k1.h>
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extern secp256k1_context *secp256k1_ctx;
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extern const struct chainparams *chainparams;
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/* Marker which indicates an (tal) pointer argument is stolen
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* (i.e. eventually freed) by the function. Unlike TAKEN, which
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* indicates it's only stolen if caller says take() */
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#define STEALS
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/* Simple accessor function for our own dependencies to use, in order to avoid
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* circular dependencies (should only be used in `bitcoin/y`). */
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bool is_elements(const struct chainparams *chainparams);
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/* Allocate and fill in a hex-encoded string of this data. */
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char *tal_hexstr(const tal_t *ctx, const void *data, size_t len);
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/* Allocate and fill a hex-encoding of this tal pointer. */
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char *tal_hex(const tal_t *ctx, const tal_t *data);
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/* Allocate and fill a buffer with the data of this hex string. */
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u8 *tal_hexdata(const tal_t *ctx, const void *str, size_t len);
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/* Macro to set memberptr in tal object outer to point to tal object obj,
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* if it isn't NULL.
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* The 0*sizeof() checks that *memberptr = obj is valid */
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#define set_softref(outer, memberptr, obj) \
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set_softref_((outer), sizeof(*(outer)) + 0*sizeof(*(memberptr) = obj), \
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(void **)(memberptr), (obj))
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/* Macro to clear a (set) softref ptr to NULL */
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#define clear_softref(outer, memberptr) \
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clear_softref_((outer), sizeof(*(outer)), (void **)(memberptr))
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void set_softref_(const tal_t *outer, size_t outersize, void **ptr, tal_t *obj);
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void clear_softref_(const tal_t *outer, size_t outersize, void **ptr);
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/* Note: p is never a complex expression, otherwise this multi-evaluates! */
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#define tal_arr_expand(p, s) \
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do { \
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size_t n_ = tal_count(*(p)); \
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tal_resize((p), n_+1); \
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(*(p))[n_] = (s); \
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} while(0)
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/**
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* Remove an element from an array
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*
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* This will shift the elements past the removed element, changing
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* their position in memory, so only use this for arrays of pointers.
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*/
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#define tal_arr_remove(p, n) tal_arr_remove_((p), sizeof(**p), (n))
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void tal_arr_remove_(void *p, size_t elemsize, size_t n);
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/**
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* The comon case of duplicating an entire tal array.
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*
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* A macro because we must not double-evaluate p.
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*/
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#define tal_dup_talarr(ctx, type, p) \
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((type *)tal_dup_talarr_((ctx), tal_typechk_(p, type *), \
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TAL_LABEL(type, "[]")))
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void *tal_dup_talarr_(const tal_t *ctx, const tal_t *src TAKES,
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const char *label);
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/* Use the POSIX C locale. */
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void setup_locale(void);
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/* Global temporary convenience context: children freed in io loop core. */
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extern const tal_t *tmpctx;
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/* Initial creation of tmpctx. */
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void setup_tmpctx(void);
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/* Free any children of tmpctx. */
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void clean_tmpctx(void);
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/* Call this before any libwally function which allocates. */
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void tal_wally_start(void);
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/* Then call this to reparent everything onto this parent (which must
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* have been tal_steal() if it was allocated by libwally here) */
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void tal_wally_end(const tal_t *parent);
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/* Define sha256_eq. */
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STRUCTEQ_DEF(sha256, 0, u);
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/* Define ripemd160_eq. */
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STRUCTEQ_DEF(ripemd160, 0, u);
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/* If gcc complains about 'may be uninitialized' even at -O3, and the code is
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* clear, use this to suppress it. Argument should be gcc version it
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* complained on, so we can re-test as gcc evolves. */
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#define COMPILER_WANTS_INIT(compiler_versions) = 0
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/* For case where we want one thing if DEVELOPER, another if not, particularly
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* for function parameters.
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*
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* Usefully, you can refer to DEVELOPER-only fields here. */
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#if DEVELOPER
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/* Make sure that nondev is evaluated, and valid */
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#define IFDEV(dev, nondev) ((void)(nondev), (dev))
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#else
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#define IFDEV(dev, nondev) (nondev)
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#endif
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/* Context which all wally allocations use (see common/setup.c) */
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extern const tal_t *wally_tal_ctx;
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#endif /* LIGHTNING_COMMON_UTILS_H */
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