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93bf7c4839
These routines free the 'struct command': a common coding error is not to return immediately. To catch this, we make them return a non-NULL 'struct command_result *', and we're going to make the command handlers return the same (to encourage 'return command_fail(...)'-style usage). We also provide two sources for external use: 1. command_param_failed() when param() fails. 2. command_its_complicated() for some complex cases. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
27 lines
862 B
C
27 lines
862 B
C
/* These functions must be supplied by any binary linking with common/param
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* so it can fail commands. */
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#ifndef LIGHTNING_COMMON_JSON_COMMAND_H
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#define LIGHTNING_COMMON_JSON_COMMAND_H
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#include "config.h"
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#include <ccan/compiler/compiler.h>
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#include <stdbool.h>
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struct command;
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struct command_result;
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/* Caller supplied this: param assumes it can call it. */
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struct command_result *command_fail(struct command *cmd, int code,
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const char *fmt, ...)
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PRINTF_FMT(3, 4);
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/* Also caller supplied: is this invoked simply to get usage? */
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bool command_usage_only(const struct command *cmd);
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/* If so, this is called. */
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void command_set_usage(struct command *cmd, const char *usage);
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/* Also caller supplied: is this invoked simply to check parameters? */
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bool command_check_only(const struct command *cmd);
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#endif /* LIGHTNING_COMMON_JSON_COMMAND_H */
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