Blame src/dalist_debug.c

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/*****************************************************************************/
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/*  dalist: a zero-dependency book-keeping library                           */
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/*  Copyright (C) 2013,2014,2015  Z. Gilboa                                  */
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/*  Released under GPLv2 and GPLv3; see COPYING.DALIST.                      */
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/*****************************************************************************/
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#include <dalist/dalist.h>
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#include "dalist_impl.h"
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dalist_api
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int dalist_debug_setup(
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	struct dalist_ex *	dlist,
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	struct dalist_debug *	dlist_debug,
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	enum dalist_dbgenv	dbgenv,
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	dalist_sprintf *	pfn_sprintf,
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	dalist_write *		pfn_write,
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	dalist_write_file *	pfn_write_file)
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{
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	if (dlist)
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		/* in case we fail */
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		dlist->debug = 0;
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	else
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		return DALIST_ELIST;
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	if (!dlist_debug)
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		return DALIST_EDEBUGSTRUCT;
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	else if (!pfn_sprintf)
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		return DALIST_EDEBUGSPRINTF;
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	switch (dbgenv) {
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		case DALIST_DEBUG_ENV_POSIX:
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			if (!pfn_write)
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				return DALIST_EDEBUGWRITE;
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			break;
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		case DALIST_DEBUG_ENV_NT:
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			if (!pfn_write_file)
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				return DALIST_EDEBUGWRITEFILE;
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			break;
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		default:
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			return DALIST_EDEBUGENV;
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	}
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	dlist_debug->dbgenv        = dbgenv;
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	dlist_debug->sprintf       = pfn_sprintf;
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	dlist_debug->write         = pfn_write;
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	dlist_debug->zw_write_file = pfn_write_file;
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	dlist->debug = dlist_debug;
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	return DALIST_OK;
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}
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static const char dalist_fmt_header_32[] =
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	"dlist:\t\t0x%08x\n"
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	"dlist->head:\t0x%08x\n"
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	"dlist->tail:\t0x%08x\n\n";
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static const char dalist_fmt_header_64[] =
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	"dlist:\t\t0x%016x\n"
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	"dlist->head:\t0x%016x\n"
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	"dlist->tail:\t0x%016x\n\n";
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static const char dalist_fmt_node_32[] =
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	"node: 0x%08x\t"
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	"prev: 0x%08x\t"
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	"next: 0x%08x\t"
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	"any:  0x%08x\t\n";
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static const char dalist_fmt_node_64[] =
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	"node: 0x%016x\t"
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	"prev: 0x%016x\t"
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	"next: 0x%016x\t"
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	"any:  0x%016x\t\n";
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static const char * dalist_fmt_headers[2] = {
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	dalist_fmt_header_32,
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	dalist_fmt_header_64
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};
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static const char * dalist_fmt_nodes[2] = {
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	dalist_fmt_node_32,
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	dalist_fmt_node_64
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};
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static int dalist_dbg_write_posix(
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	struct dalist_ex *	dlist,
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	intptr_t		fildes_or_hfile,
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	const void *		buf,
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	size_t			nbyte)
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{
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	int		fildes;
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	dalist_write *	pfn_write;
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	ssize_t		bytes_written;
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	fildes = (int)fildes_or_hfile;
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	pfn_write = (dalist_write *)dlist->debug->write;
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	bytes_written = pfn_write(fildes,buf,nbyte);
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	if (bytes_written < 0)
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		return DALIST_EDEBUGENV;
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	else if (bytes_written == (ssize_t)nbyte)
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		return DALIST_OK;
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	else
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		return DALIST_EDEBUGENV;
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}
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static int dalist_dbg_write_nt(
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	struct dalist_ex *	dlist,
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	intptr_t		fildes_or_hfile,
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	const void *		buf,
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	size_t			nbyte)
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{
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	void *			hfile;
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	struct dalist_iosb	iosb;
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	dalist_write_file *	pfn_write_file;
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	hfile          = (void *)fildes_or_hfile;
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	pfn_write_file = (dalist_write_file *)dlist->debug->zw_write_file;
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	return pfn_write_file(
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		hfile,
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		(void *)0,
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		(void *)0,
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		(void *)0,
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		&iosb,
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		(void *)buf,
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		(uint32_t)nbyte,
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		(int64_t *)0,
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		(uint32_t *)0);
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}
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dalist_api
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int dalist_debug_print(
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	struct dalist_ex *	dlist,
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	intptr_t		fildes_or_hfile)
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{
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	const char *		fmt_header;
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	const char *		fmt_node;
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	char			dbg_buf[128];
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	intptr_t		nbyte;
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	int			status;
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	struct dalist_node *	node;
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	dalist_sprintf *	dbg_sprintf;
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	dalist_dbg_write *	dbg_write;
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	if (!dlist)
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		return DALIST_ELIST;
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	else if (!dlist->debug)
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		return DALIST_EDEBUGENV;
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	/* initial setup */
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	dbg_sprintf = (dalist_sprintf *)dlist->debug->sprintf;
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	fmt_header  = dalist_fmt_headers[(sizeof(size_t)-4)/4];
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	fmt_node    = dalist_fmt_nodes[(sizeof(size_t)-4)/4];
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	if (dlist->debug->dbgenv == DALIST_DEBUG_ENV_POSIX)
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		dbg_write = dalist_dbg_write_posix;
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	else if (dlist->debug->dbgenv == DALIST_DEBUG_ENV_NT)
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		dbg_write = dalist_dbg_write_nt;
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	else
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		dbg_write = 0;
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	if ((!dbg_sprintf) || (!dbg_write))
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		return DALIST_EDEBUGENV;
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	/* print list header */
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	nbyte = dbg_sprintf((char *)dbg_buf,fmt_header,dlist,dlist->head,dlist->tail);
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	if (nbyte < 0)
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		return DALIST_EDEBUGENV;
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	status = dbg_write(dlist,fildes_or_hfile,dbg_buf,nbyte);
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	if (status != NT_STATUS_SUCCESS)
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		return DALIST_EDEBUGENV;
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	/* print node information */
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	status = DALIST_OK;
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	node   = (struct dalist_node *)dlist->head;
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	while (node && (status == DALIST_OK)) {
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		/* create output line */
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		nbyte = dbg_sprintf(
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			(char *)dbg_buf,
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			fmt_node,
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			node,
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			node->prev,
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			node->next,
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			node->any);
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		if (nbyte < 0)
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			return DALIST_EDEBUGENV;
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		/* write output line */
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		status = dbg_write(
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			dlist,
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			fildes_or_hfile,
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			dbg_buf,
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			nbyte);
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		node = node->next;
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	}
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	return DALIST_OK;
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}