paxmirabilis/src/gen_subs.c

/*      $OpenBSD: gen_subs.c,v 1.19 2007/04/04 21:55:10 millert Exp $   */
/*      $NetBSD: gen_subs.c,v 1.5 1995/03/21 09:07:26 cgd Exp $ */

/*-
 * Copyright (c) 1992 Keith Muller.
 * Copyright (c) 1992, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Keith Muller of the University of California, San Diego.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/param.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <stdio.h>
#ifdef __INTERIX
#include <utmpx.h>
#else
#include <utmp.h>
#endif
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#ifndef __GLIBC__
#include <vis.h>
#endif
#include "pax.h"
#include "extern.h"

__SCCSID("@(#)gen_subs.c        8.1 (Berkeley) 5/31/93");
__RCSID("$MirOS: src/bin/pax/gen_subs.c,v 1.9 2008/03/14 15:55:21 tg Exp $");

#ifdef __GLIBC__
void strmode(mode_t, char *);
#endif

/*
 * a collection of general purpose subroutines used by pax
 */

/*
 * constants used by ls_list() when printing out archive members
 */
#define MODELEN 20
#define DATELEN 64
#define SIXMONTHS        ((DAYSPERNYEAR / 2) * SECSPERDAY)
#define CURFRMT         "%b %e %H:%M"
#define OLDFRMT         "%b %e  %Y"
#define NAME_WIDTH      8

/*
 * ls_list()
 *      list the members of an archive in ls format
 */

void
ls_list(ARCHD *arcn, time_t now, FILE *fp)
{
        struct stat *sbp;
        char f_mode[MODELEN];
        char f_date[DATELEN];
        const char *timefrmt;
        int term;

        term = zeroflag ? '\0' : '\n';  /* path termination character */

        /*
         * if not verbose, just print the file name
         */
        if (!vflag) {
                if (zeroflag)
                        (void)fputs(arcn->name, fp);
                else
                        safe_print(arcn->name, fp);
                (void)putc(term, fp);
                (void)fflush(fp);
                return;
        }

        /*
         * user wants long mode
         */
        sbp = &(arcn->sb);
        strmode(sbp->st_mode, f_mode);

        if (ltmfrmt == NULL) {
                /*
                 * no locale specified format. time format based on age
                 * compared to the time pax was started.
                 */
                if ((sbp->st_mtime + SIXMONTHS) <= now)
                        timefrmt = OLDFRMT;
                else
                        timefrmt = CURFRMT;
        } else
                timefrmt = ltmfrmt;

        /*
         * print file mode, link count, uid, gid and time
         */
        if (strftime(f_date,DATELEN,timefrmt,localtime(&(sbp->st_mtime))) == 0)
                f_date[0] = '\0';
        (void)fprintf(fp, "%s%2u %-*.*s %-*.*s ", f_mode,
                (unsigned)sbp->st_nlink,
                NAME_WIDTH, UT_NAMESIZE, name_uid(sbp->st_uid, 1),
                NAME_WIDTH, UT_NAMESIZE, name_gid(sbp->st_gid, 1));

        /*
         * print device id's for devices, or sizes for other nodes
         */
        if ((arcn->type == PAX_CHR) || (arcn->type == PAX_BLK))
                (void)fprintf(fp, "%4lu,%4lu ", (unsigned long)MAJOR(sbp->st_rdev),
                    (unsigned long)MINOR(sbp->st_rdev));
        else {
#               ifdef LONG_OFF_T
                (void)fprintf(fp, "%9lu ", sbp->st_size);
#               else
                (void)fprintf(fp, "%9llu ", sbp->st_size);
#               endif
        }

        /*
         * print name and link info for hard and soft links
         */
        (void)fputs(f_date, fp);
        (void)putc(' ', fp);
        safe_print(arcn->name, fp);
        if ((arcn->type == PAX_HLK) || (arcn->type == PAX_HRG)) {
                fputs(" == ", fp);
                safe_print(arcn->ln_name, fp);
        } else if (arcn->type == PAX_SLK) {
                fputs(" -> ", fp);
                safe_print(arcn->ln_name, fp);
        }
        (void)putc(term, fp);
        (void)fflush(fp);
        return;
}

/*
 * tty_ls()
 *      print a short summary of file to tty.
 */

void
ls_tty(ARCHD *arcn)
{
        char f_date[DATELEN];
        char f_mode[MODELEN];
        const char *timefrmt;

        if (ltmfrmt == NULL) {
                /*
                 * no locale specified format
                 */
                if ((arcn->sb.st_mtime + SIXMONTHS) <= time(NULL))
                        timefrmt = OLDFRMT;
                else
                        timefrmt = CURFRMT;
        } else
                timefrmt = ltmfrmt;

        /*
         * convert time to string, and print
         */
        if (strftime(f_date, DATELEN, timefrmt,
            localtime(&(arcn->sb.st_mtime))) == 0)
                f_date[0] = '\0';
        strmode(arcn->sb.st_mode, f_mode);
        tty_prnt("%s%s %s\n", f_mode, f_date, arcn->name);
        return;
}

void
safe_print(const char *str, FILE *fp)
{
#ifndef __GLIBC__
        char visbuf[5];
        const char *cp;

        /*
         * if printing to a tty, use vis(3) to print special characters.
         */
        if (isatty(fileno(fp))) {
                for (cp = str; *cp; cp++) {
                        (void)vis(visbuf, cp[0], VIS_CSTYLE, cp[1]);
                        (void)fputs(visbuf, fp);
                }
        } else
#endif
                (void)fputs(str, fp);
}

/*
 * asc_ul()
 *      convert hex/octal character string into a u_long. We do not have to
 *      check for overflow! (the headers in all supported formats are not large
 *      enough to create an overflow).
 *      NOTE: strings passed to us are NOT TERMINATED.
 * Return:
 *      unsigned long value
 */

u_long
asc_ul(char *str, int len, int base)
{
        char *stop;
        u_long tval = 0;

        stop = str + len;

        /*
         * skip over leading blanks and zeros
         */
        while ((str < stop) && ((*str == ' ') || (*str == '0')))
                ++str;

        /*
         * for each valid digit, shift running value (tval) over to next digit
         * and add next digit
         */
        if (base == HEX) {
                while (str < stop) {
                        if ((*str >= '0') && (*str <= '9'))
                                tval = (tval << 4) + (*str++ - '0');
                        else if ((*str >= 'A') && (*str <= 'F'))
                                tval = (tval << 4) + 10 + (*str++ - 'A');
                        else if ((*str >= 'a') && (*str <= 'f'))
                                tval = (tval << 4) + 10 + (*str++ - 'a');
                        else
                                break;
                }
        } else {
                while ((str < stop) && (*str >= '0') && (*str <= '7'))
                        tval = (tval << 3) + (*str++ - '0');
        }
        return(tval);
}

/*
 * ul_asc()
 *      convert an unsigned long into an hex/oct ascii string. pads with LEADING
 *      ascii 0's to fill string completely
 *      NOTE: the string created is NOT TERMINATED.
 */

int
ul_asc(u_long val, char *str, int len, int base)
{
        char *pt;
        u_long digit;

        /*
         * WARNING str is not '\0' terminated by this routine
         */
        pt = str + len - 1;

        /*
         * do a tailwise conversion (start at right most end of string to place
         * least significant digit). Keep shifting until conversion value goes
         * to zero (all digits were converted)
         */
        if (base == HEX) {
                while (pt >= str) {
                        if ((digit = (val & 0xf)) < 10)
                                *pt-- = '0' + (char)digit;
                        else
                                *pt-- = 'a' + (char)(digit - 10);
                        if ((val = (val >> 4)) == (u_long)0)
                                break;
                }
        } else {
                while (pt >= str) {
                        *pt-- = '0' + (char)(val & 0x7);
                        if ((val = (val >> 3)) == (u_long)0)
                                break;
                }
        }

        /*
         * pad with leading ascii ZEROS. We return -1 if we ran out of space.
         */
        while (pt >= str)
                *pt-- = '0';
        if (val != (u_long)0)
                return(-1);
        return(0);
}

#ifndef LONG_OFF_T
/*
 * asc_uqd()
 *      convert hex/octal character string into a u_quad_t. We do not have to
 *      check for overflow! (the headers in all supported formats are not large
 *      enough to create an overflow).
 *      NOTE: strings passed to us are NOT TERMINATED.
 * Return:
 *      u_quad_t value
 */

u_quad_t
asc_uqd(char *str, int len, int base)
{
        char *stop;
        u_quad_t tval = 0;

        stop = str + len;

        /*
         * skip over leading blanks and zeros
         */
        while ((str < stop) && ((*str == ' ') || (*str == '0')))
                ++str;

        /*
         * for each valid digit, shift running value (tval) over to next digit
         * and add next digit
         */
        if (base == HEX) {
                while (str < stop) {
                        if ((*str >= '0') && (*str <= '9'))
                                tval = (tval << 4) + (*str++ - '0');
                        else if ((*str >= 'A') && (*str <= 'F'))
                                tval = (tval << 4) + 10 + (*str++ - 'A');
                        else if ((*str >= 'a') && (*str <= 'f'))
                                tval = (tval << 4) + 10 + (*str++ - 'a');
                        else
                                break;
                }
        } else {
                while ((str < stop) && (*str >= '0') && (*str <= '7'))
                        tval = (tval << 3) + (*str++ - '0');
        }
        return(tval);
}

/*
 * uqd_asc()
 *      convert an u_quad_t into a hex/oct ascii string. pads with LEADING
 *      ascii 0's to fill string completely
 *      NOTE: the string created is NOT TERMINATED.
 */

int
uqd_asc(u_quad_t val, char *str, int len, int base)
{
        char *pt;
        u_quad_t digit;

        /*
         * WARNING str is not '\0' terminated by this routine
         */
        pt = str + len - 1;

        /*
         * do a tailwise conversion (start at right most end of string to place
         * least significant digit). Keep shifting until conversion value goes
         * to zero (all digits were converted)
         */
        if (base == HEX) {
                while (pt >= str) {
                        if ((digit = (val & 0xf)) < 10)
                                *pt-- = '0' + (char)digit;
                        else
                                *pt-- = 'a' + (char)(digit - 10);
                        if ((val = (val >> 4)) == (u_quad_t)0)
                                break;
                }
        } else {
                while (pt >= str) {
                        *pt-- = '0' + (char)(val & 0x7);
                        if ((val = (val >> 3)) == (u_quad_t)0)
                                break;
                }
        }

        /*
         * pad with leading ascii ZEROS. We return -1 if we ran out of space.
         */
        while (pt >= str)
                *pt-- = '0';
        if (val != (u_quad_t)0)
                return(-1);
        return(0);
}
#endif

/*
 * Copy at max min(bufz, fieldsz) chars from field to buf, stopping
 * at the first NUL char. NUL terminate buf if there is room left.
 */
size_t
fieldcpy(char *buf, size_t bufsz, const char *field, size_t fieldsz)
{
        char *p = buf;
        const char *q = field;
        size_t i = 0;

        if (fieldsz > bufsz)
                fieldsz = bufsz;
        while (i < fieldsz && *q != '\0') {
                *p++ = *q++;
                i++;
        }
        if (i < bufsz)
                *p = '\0';
        return(i);
}
// Log In
// CVSweb
Project: FreeWRT
// Summary // Activity // Search // Tracker // Lists // News // SCM // Wiki
1	/* $OpenBSD: gen_subs.c,v 1.19 2007/04/04 21:55:10 millert Exp $ */
2	/* $NetBSD: gen_subs.c,v 1.5 1995/03/21 09:07:26 cgd Exp $ */
3
4	/*-
5	* Copyright (c) 1992 Keith Muller.
6	* Copyright (c) 1992, 1993
7	* The Regents of the University of California. All rights reserved.
8	*
9	* This code is derived from software contributed to Berkeley by
10	* Keith Muller of the University of California, San Diego.
11	*
12	* Redistribution and use in source and binary forms, with or without
13	* modification, are permitted provided that the following conditions
14	* are met:
15	* 1. Redistributions of source code must retain the above copyright
16	* notice, this list of conditions and the following disclaimer.
17	* 2. Redistributions in binary form must reproduce the above copyright
18	* notice, this list of conditions and the following disclaimer in the
19	* documentation and/or other materials provided with the distribution.
20	* 3. Neither the name of the University nor the names of its contributors
21	* may be used to endorse or promote products derived from this software
22	* without specific prior written permission.
23	*
24	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34	* SUCH DAMAGE.
35	*/
36
37	#include <sys/param.h>
38	#include <sys/time.h>
39	#include <sys/stat.h>
40	#include <stdio.h>
41	#ifdef __INTERIX
42	#include <utmpx.h>
43	#else
44	#include <utmp.h>
45	#endif
46	#include <unistd.h>
47	#include <stdlib.h>
48	#include <string.h>
49	#ifndef __GLIBC__
50	#include <vis.h>
51	#endif
52	#include "pax.h"
53	#include "extern.h"
54
55	__SCCSID("@(#)gen_subs.c 8.1 (Berkeley) 5/31/93");
56	__RCSID("$MirOS: src/bin/pax/gen_subs.c,v 1.9 2008/03/14 15:55:21 tg Exp $");
57
58	#ifdef __GLIBC__
59	void strmode(mode_t, char *);
60	#endif
61
62	/*
63	* a collection of general purpose subroutines used by pax
64	*/
65
66	/*
67	* constants used by ls_list() when printing out archive members
68	*/
69	#define MODELEN 20
70	#define DATELEN 64
71	#define SIXMONTHS ((DAYSPERNYEAR / 2) * SECSPERDAY)
72	#define CURFRMT "%b %e %H:%M"
73	#define OLDFRMT "%b %e %Y"
74	#define NAME_WIDTH 8
75
76	/*
77	* ls_list()
78	* list the members of an archive in ls format
79	*/
80
81	void
82	ls_list(ARCHD arcn, time_t now, FILE fp)
83	{
84	struct stat *sbp;
85	char f_mode[MODELEN];
86	char f_date[DATELEN];
87	const char *timefrmt;
88	int term;
89
90	term = zeroflag ? '\0' : '\n'; /* path termination character */
91
92	/*
93	* if not verbose, just print the file name
94	*/
95	if (!vflag) {
96	if (zeroflag)
97	(void)fputs(arcn->name, fp);
98	else
99	safe_print(arcn->name, fp);
100	(void)putc(term, fp);
101	(void)fflush(fp);
102	return;
103	}
104
105	/*
106	* user wants long mode
107	*/
108	sbp = &(arcn->sb);
109	strmode(sbp->st_mode, f_mode);
110
111	if (ltmfrmt == NULL) {
112	/*
113	* no locale specified format. time format based on age
114	* compared to the time pax was started.
115	*/
116	if ((sbp->st_mtime + SIXMONTHS) <= now)
117	timefrmt = OLDFRMT;
118	else
119	timefrmt = CURFRMT;
120	} else
121	timefrmt = ltmfrmt;
122
123	/*
124	* print file mode, link count, uid, gid and time
125	*/
126	if (strftime(f_date,DATELEN,timefrmt,localtime(&(sbp->st_mtime))) == 0)
127	f_date[0] = '\0';
128	(void)fprintf(fp, "%s%2u %-.s %-.s ", f_mode,
129	(unsigned)sbp->st_nlink,
130	NAME_WIDTH, UT_NAMESIZE, name_uid(sbp->st_uid, 1),
131	NAME_WIDTH, UT_NAMESIZE, name_gid(sbp->st_gid, 1));
132
133	/*
134	* print device id's for devices, or sizes for other nodes
135	*/
136	if ((arcn->type == PAX_CHR) \|\| (arcn->type == PAX_BLK))
137	(void)fprintf(fp, "%4lu,%4lu ", (unsigned long)MAJOR(sbp->st_rdev),
138	(unsigned long)MINOR(sbp->st_rdev));
139	else {
140	# ifdef LONG_OFF_T
141	(void)fprintf(fp, "%9lu ", sbp->st_size);
142	# else
143	(void)fprintf(fp, "%9llu ", sbp->st_size);
144	# endif
145	}
146
147	/*
148	* print name and link info for hard and soft links
149	*/
150	(void)fputs(f_date, fp);
151	(void)putc(' ', fp);
152	safe_print(arcn->name, fp);
153	if ((arcn->type == PAX_HLK) \|\| (arcn->type == PAX_HRG)) {
154	fputs(" == ", fp);
155	safe_print(arcn->ln_name, fp);
156	} else if (arcn->type == PAX_SLK) {
157	fputs(" -> ", fp);
158	safe_print(arcn->ln_name, fp);
159	}
160	(void)putc(term, fp);
161	(void)fflush(fp);
162	return;
163	}
164
165	/*
166	* tty_ls()
167	* print a short summary of file to tty.
168	*/
169
170	void
171	ls_tty(ARCHD *arcn)
172	{
173	char f_date[DATELEN];
174	char f_mode[MODELEN];
175	const char *timefrmt;
176
177	if (ltmfrmt == NULL) {
178	/*
179	* no locale specified format
180	*/
181	if ((arcn->sb.st_mtime + SIXMONTHS) <= time(NULL))
182	timefrmt = OLDFRMT;
183	else
184	timefrmt = CURFRMT;
185	} else
186	timefrmt = ltmfrmt;
187
188	/*
189	* convert time to string, and print
190	*/
191	if (strftime(f_date, DATELEN, timefrmt,
192	localtime(&(arcn->sb.st_mtime))) == 0)
193	f_date[0] = '\0';
194	strmode(arcn->sb.st_mode, f_mode);
195	tty_prnt("%s%s %s\n", f_mode, f_date, arcn->name);
196	return;
197	}
198
199	void
200	safe_print(const char str, FILE fp)
201	{
202	#ifndef __GLIBC__
203	char visbuf[5];
204	const char *cp;
205
206	/*
207	* if printing to a tty, use vis(3) to print special characters.
208	*/
209	if (isatty(fileno(fp))) {
210	for (cp = str; *cp; cp++) {
211	(void)vis(visbuf, cp[0], VIS_CSTYLE, cp[1]);
212	(void)fputs(visbuf, fp);
213	}
214	} else
215	#endif
216	(void)fputs(str, fp);
217	}
218
219	/*
220	* asc_ul()
221	* convert hex/octal character string into a u_long. We do not have to
222	* check for overflow! (the headers in all supported formats are not large
223	* enough to create an overflow).
224	* NOTE: strings passed to us are NOT TERMINATED.
225	* Return:
226	* unsigned long value
227	*/
228
229	u_long
230	asc_ul(char *str, int len, int base)
231	{
232	char *stop;
233	u_long tval = 0;
234
235	stop = str + len;
236
237	/*
238	* skip over leading blanks and zeros
239	*/
240	while ((str < stop) && ((str == ' ') \|\| (str == '0')))
241	++str;
242
243	/*
244	* for each valid digit, shift running value (tval) over to next digit
245	* and add next digit
246	*/
247	if (base == HEX) {
248	while (str < stop) {
249	if ((str >= '0') && (str <= '9'))
250	tval = (tval << 4) + (*str++ - '0');
251	else if ((str >= 'A') && (str <= 'F'))
252	tval = (tval << 4) + 10 + (*str++ - 'A');
253	else if ((str >= 'a') && (str <= 'f'))
254	tval = (tval << 4) + 10 + (*str++ - 'a');
255	else
256	break;
257	}
258	} else {
259	while ((str < stop) && (str >= '0') && (str <= '7'))
260	tval = (tval << 3) + (*str++ - '0');
261	}
262	return(tval);
263	}
264
265	/*
266	* ul_asc()
267	* convert an unsigned long into an hex/oct ascii string. pads with LEADING
268	* ascii 0's to fill string completely
269	* NOTE: the string created is NOT TERMINATED.
270	*/
271
272	int
273	ul_asc(u_long val, char *str, int len, int base)
274	{
275	char *pt;
276	u_long digit;
277
278	/*
279	* WARNING str is not '\0' terminated by this routine
280	*/
281	pt = str + len - 1;
282
283	/*
284	* do a tailwise conversion (start at right most end of string to place
285	* least significant digit). Keep shifting until conversion value goes
286	* to zero (all digits were converted)
287	*/
288	if (base == HEX) {
289	while (pt >= str) {
290	if ((digit = (val & 0xf)) < 10)
291	*pt-- = '0' + (char)digit;
292	else
293	*pt-- = 'a' + (char)(digit - 10);
294	if ((val = (val >> 4)) == (u_long)0)
295	break;
296	}
297	} else {
298	while (pt >= str) {
299	*pt-- = '0' + (char)(val & 0x7);
300	if ((val = (val >> 3)) == (u_long)0)
301	break;
302	}
303	}
304
305	/*
306	* pad with leading ascii ZEROS. We return -1 if we ran out of space.
307	*/
308	while (pt >= str)
309	*pt-- = '0';
310	if (val != (u_long)0)
311	return(-1);
312	return(0);
313	}
314
315	#ifndef LONG_OFF_T
316	/*
317	* asc_uqd()
318	* convert hex/octal character string into a u_quad_t. We do not have to
319	* check for overflow! (the headers in all supported formats are not large
320	* enough to create an overflow).
321	* NOTE: strings passed to us are NOT TERMINATED.
322	* Return:
323	* u_quad_t value
324	*/
325
326	u_quad_t
327	asc_uqd(char *str, int len, int base)
328	{
329	char *stop;
330	u_quad_t tval = 0;
331
332	stop = str + len;
333
334	/*
335	* skip over leading blanks and zeros
336	*/
337	while ((str < stop) && ((str == ' ') \|\| (str == '0')))
338	++str;
339
340	/*
341	* for each valid digit, shift running value (tval) over to next digit
342	* and add next digit
343	*/
344	if (base == HEX) {
345	while (str < stop) {
346	if ((str >= '0') && (str <= '9'))
347	tval = (tval << 4) + (*str++ - '0');
348	else if ((str >= 'A') && (str <= 'F'))
349	tval = (tval << 4) + 10 + (*str++ - 'A');
350	else if ((str >= 'a') && (str <= 'f'))
351	tval = (tval << 4) + 10 + (*str++ - 'a');
352	else
353	break;
354	}
355	} else {
356	while ((str < stop) && (str >= '0') && (str <= '7'))
357	tval = (tval << 3) + (*str++ - '0');
358	}
359	return(tval);
360	}
361
362	/*
363	* uqd_asc()
364	* convert an u_quad_t into a hex/oct ascii string. pads with LEADING
365	* ascii 0's to fill string completely
366	* NOTE: the string created is NOT TERMINATED.
367	*/
368
369	int
370	uqd_asc(u_quad_t val, char *str, int len, int base)
371	{
372	char *pt;
373	u_quad_t digit;
374
375	/*
376	* WARNING str is not '\0' terminated by this routine
377	*/
378	pt = str + len - 1;
379
380	/*
381	* do a tailwise conversion (start at right most end of string to place
382	* least significant digit). Keep shifting until conversion value goes
383	* to zero (all digits were converted)
384	*/
385	if (base == HEX) {
386	while (pt >= str) {
387	if ((digit = (val & 0xf)) < 10)
388	*pt-- = '0' + (char)digit;
389	else
390	*pt-- = 'a' + (char)(digit - 10);
391	if ((val = (val >> 4)) == (u_quad_t)0)
392	break;
393	}
394	} else {
395	while (pt >= str) {
396	*pt-- = '0' + (char)(val & 0x7);
397	if ((val = (val >> 3)) == (u_quad_t)0)
398	break;
399	}
400	}
401
402	/*
403	* pad with leading ascii ZEROS. We return -1 if we ran out of space.
404	*/
405	while (pt >= str)
406	*pt-- = '0';
407	if (val != (u_quad_t)0)
408	return(-1);
409	return(0);
410	}
411	#endif
412
413	/*
414	* Copy at max min(bufz, fieldsz) chars from field to buf, stopping
415	* at the first NUL char. NUL terminate buf if there is room left.
416	*/
417	size_t
418	fieldcpy(char buf, size_t bufsz, const char field, size_t fieldsz)
419	{
420	char *p = buf;
421	const char *q = field;
422	size_t i = 0;
423
424	if (fieldsz > bufsz)
425	fieldsz = bufsz;
426	while (i < fieldsz && *q != '\0') {
427	p++ = q++;
428	i++;
429	}
430	if (i < bufsz)
431	*p = '\0';
432	return(i);
433	}