src/common/header.c

#ifndef lint
static const char       RCSid[] = "$Id: header.c,v 2.22 2004/01/02 11:35:17 schorsch Exp $";
#endif
/*
 *  header.c - routines for reading and writing information headers.
 *
 *  Externals declared in resolu.h
 *
 *  newheader(t,fp)     start new information header identified by string t
 *  isheadid(s)         returns true if s is a header id line
 *  headidval(r,s)      copy header identifier value in s to r
 *  dateval(t,s)        get capture date value
 *  isdate(s)           returns true if s is a date line
 *  fputdate(t,fp)      put out the given capture date and time
 *  fputnow(fp)         put out the current date and time
 *  printargs(ac,av,fp) print an argument list to fp, followed by '\n'
 *  isformat(s)         returns true if s is of the form "FORMAT=*"
 *  formatval(r,s)      copy the format value in s to r
 *  fputformat(s,fp)    write "FORMAT=%s" to fp
 *  getheader(fp,f,p)   read header from fp, calling f(s,p) on each line
 *  globmatch(pat, str) check for glob match of str against pat
 *  checkheader(i,p,o)  check header format from i against p and copy to o
 *
 *  To copy header from input to output, use getheader(fin, fputs, fout)
 */

#include "copyright.h"

#include  <ctype.h>

#include  "rtio.h"
#include  "resolu.h"

#define  MAXLINE        512

char  HDRSTR[] = "#?";          /* information header magic number */

char  FMTSTR[] = "FORMAT=";     /* format identifier */

char  TMSTR[] = "CAPDATE=";     /* capture date identifier */

static gethfunc mycheck;


extern void
newheader(              /* identifying line of information header */
        char  *s,
        register FILE  *fp
)
{
        fputs(HDRSTR, fp);
        fputs(s, fp);
        putc('\n', fp);
}


extern int
headidval(                      /* get header id (return true if is id) */
        register char  *r,
        register char   *s
)
{
        register char  *cp = HDRSTR;

        while (*cp) if (*cp++ != *s++) return(0);
        if (r == NULL) return(1);
        while (*s && !isspace(*s)) *r++ = *s++;
        *r = '\0';
        return(1);
}


extern int
isheadid(                       /* check to see if line is header id */
        char  *s
)
{
        return(headidval(NULL, s));
}


extern int
dateval(                /* get capture date value */
        time_t  *tloc,
        char    *s
)
{
        struct tm       tms;
        register char  *cp = TMSTR;

        while (*cp) if (*cp++ != *s++) return(0);
        while (isspace(*s)) s++;
        if (!*s) return(0);
        if (sscanf(s, "%d:%d:%d %d:%d:%d",
                        &tms.tm_year, &tms.tm_mon, &tms.tm_mday,
                        &tms.tm_hour, &tms.tm_min, &tms.tm_sec) != 6)
                return(0);
        if (tloc == NULL)
                return(1);
        tms.tm_mon--;
        tms.tm_year -= 1900;
        tms.tm_isdst = -1;      /* ask mktime() to figure out DST */
        *tloc = mktime(&tms);
        return(1);
}


extern int
isdate(                 /* is the given line a capture date? */
        char *s
)
{
        return(dateval(NULL, s));
}


extern void
fputdate(               /* write out the given time value */
        time_t  tv,
        FILE    *fp
)
{
        struct tm       *tm = localtime(&tv);
        if (tm == NULL)
                return;
        fprintf(fp, "%s %04d:%02d:%02d %02d:%02d:%02d\n", TMSTR,
                        tm->tm_year+1900, tm->tm_mon+1, tm->tm_mday,
                        tm->tm_hour, tm->tm_min, tm->tm_sec);
}


extern void
fputnow(                        /* write out the current time */
        FILE    *fp
)
{
        time_t  tv;
        time(&tv);
        fputdate(tv, fp);
}


extern void
printargs(              /* print arguments to a file */
        int  ac,
        char  **av,
        FILE  *fp
)
{
        while (ac-- > 0) {
                fputword(*av++, fp);
                fputc(ac ? ' ' : '\n', fp);
        }
}


extern int
formatval(                      /* get format value (return true if format) */
        register char  *r,
        register char  *s
)
{
        register char  *cp = FMTSTR;

        while (*cp) if (*cp++ != *s++) return(0);
        while (isspace(*s)) s++;
        if (!*s) return(0);
        if (r == NULL) return(1);
        do
                *r++ = *s++;
        while(*s && !isspace(*s));
        *r = '\0';
        return(1);
}


extern int
isformat(                       /* is line a format line? */
        char  *s
)
{
        return(formatval(NULL, s));
}


extern void
fputformat(             /* put out a format value */
        char  *s,
        FILE  *fp
)
{
        fputs(FMTSTR, fp);
        fputs(s, fp);
        putc('\n', fp);
}


extern int
getheader(              /* get header from file */
        FILE  *fp,
        gethfunc *f,
        void  *p
)
{
        char  buf[MAXLINE];

        for ( ; ; ) {
                buf[MAXLINE-2] = '\n';
                if (fgets(buf, MAXLINE, fp) == NULL)
                        return(-1);
                if (buf[0] == '\n')
                        return(0);
#ifdef MSDOS
                if (buf[0] == '\r' && buf[1] == '\n')
                        return(0);
#endif
                if (buf[MAXLINE-2] != '\n') {
                        ungetc(buf[MAXLINE-2], fp);     /* prevent false end */
                        buf[MAXLINE-2] = '\0';
                }
                if (f != NULL && (*f)(buf, p) < 0)
                        return(-1);
        }
}


struct check {
        FILE    *fp;
        char    fs[64];
};


static int
mycheck(                        /* check a header line for format info. */
        char  *s,
        void  *cp
)
{
        if (!formatval(((struct check*)cp)->fs, s)
                        && ((struct check*)cp)->fp != NULL) {
                fputs(s, ((struct check*)cp)->fp);
        }
        return(0);
}


extern int
globmatch(                      /* check for match of s against pattern p */
        register char   *p,
        register char   *s
)
{
        int     setmatch;

        do {
                switch (*p) {
                case '?':                       /* match any character */
                        if (!*s++)
                                return(0);
                        break;
                case '*':                       /* match any string */
                        while (p[1] == '*') p++;
                        do
                                if ( (p[1]=='?' || p[1]==*s) &&
                                                globmatch(p+1,s) )
                                        return(1);
                        while (*s++);
                        return(0);
                case '[':                       /* character set */
                        setmatch = *s == *++p;
                        if (!*p)
                                return(0);
                        while (*++p != ']') {
                                if (!*p)
                                        return(0);
                                if (*p == '-') {
                                        setmatch += p[-1] <= *s && *s <= p[1];
                                        if (!*++p)
                                                break;
                                } else
                                        setmatch += *p == *s;
                        }
                        if (!setmatch)
                                return(0);
                        s++;
                        break;
                case '\\':                      /* literal next */
                        p++;
                /* fall through */
                default:                        /* normal character */
                        if (*p != *s)
                                return(0);
                        s++;
                        break;
                }
        } while (*p++);
        return(1);
}


/*
 * Checkheader(fin,fmt,fout) returns a value of 1 if the input format
 * matches the specification in fmt, 0 if no input format was found,
 * and -1 if the input format does not match or there is an
 * error reading the header.  If fmt is empty, then -1 is returned
 * if any input format is found (or there is an error), and 0 otherwise.
 * If fmt contains any '*' or '?' characters, then checkheader
 * does wildcard expansion and copies a matching result into fmt.
 * Be sure that fmt is big enough to hold the match in such cases,
 * and that it is not a static, read-only string!
 * The input header (minus any format lines) is copied to fout
 * if fout is not NULL.
 */

extern int
checkheader(
        FILE  *fin,
        char  *fmt,
        FILE  *fout
)
{
        struct check    cdat;
        register char   *cp;

        cdat.fp = fout;
        cdat.fs[0] = '\0';
        if (getheader(fin, mycheck, &cdat) < 0)
                return(-1);
        if (!cdat.fs[0])
                return(0);
        for (cp = fmt; *cp; cp++)               /* check for globbing */
                if ((*cp == '?') | (*cp == '*')) {
                        if (globmatch(fmt, cdat.fs)) {
                                strcpy(fmt, cdat.fs);
                                return(1);
                        } else
                                return(-1);
                }
        return(strcmp(fmt, cdat.fs) ? -1 : 1);  /* literal match */
}
Revision:	2.23
Committed:	Tue Feb 1 01:28:16 2005 UTC (19 years, 3 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad3R7P2, rad3R7P1, rad3R8, rad3R9
Changes since 2.22:	+1 -2 lines
Log Message:	Eliminated redundant include files.
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.23	static const char RCSid[] = "$Id: header.c,v 2.22 2004/01/02 11:35:17 schorsch Exp $";
3	greg	1.1	#endif
4			/*
5			* header.c - routines for reading and writing information headers.
6			*
7	greg	2.11	* Externals declared in resolu.h
8	greg	1.3	*
9	greg	2.4	* newheader(t,fp) start new information header identified by string t
10			* isheadid(s) returns true if s is a header id line
11			* headidval(r,s) copy header identifier value in s to r
12	greg	2.11	* dateval(t,s) get capture date value
13			* isdate(s) returns true if s is a date line
14			* fputdate(t,fp) put out the given capture date and time
15			* fputnow(fp) put out the current date and time
16	greg	2.3	* printargs(ac,av,fp) print an argument list to fp, followed by '\n'
17	greg	1.3	* isformat(s) returns true if s is of the form "FORMAT=*"
18			* formatval(r,s) copy the format value in s to r
19			* fputformat(s,fp) write "FORMAT=%s" to fp
20			* getheader(fp,f,p) read header from fp, calling f(s,p) on each line
21	greg	2.6	* globmatch(pat, str) check for glob match of str against pat
22	greg	1.3	* checkheader(i,p,o) check header format from i against p and copy to o
23			*
24			* To copy header from input to output, use getheader(fin, fputs, fout)
25	greg	1.1	*/
26
27	greg	2.12	#include "copyright.h"
28	greg	2.11
29	greg	1.3	#include <ctype.h>
30	schorsch	2.17
31	greg	2.18	#include "rtio.h"
32			#include "resolu.h"
33	schorsch	2.14
34	greg	2.3	#define MAXLINE 512
35	greg	2.2
36	greg	2.4	char HDRSTR[] = "#?"; /* information header magic number */
37	greg	1.2
38	greg	2.4	char FMTSTR[] = "FORMAT="; /* format identifier */
39	greg	1.2
40	greg	2.11	char TMSTR[] = "CAPDATE="; /* capture date identifier */
41	greg	2.16
42	schorsch	2.22	static gethfunc mycheck;
43	greg	2.4
44	greg	2.11
45	schorsch	2.22	extern void
46			newheader( /* identifying line of information header */
47			char *s,
48			register FILE *fp
49			)
50	greg	2.4	{
51			fputs(HDRSTR, fp);
52			fputs(s, fp);
53			putc('\n', fp);
54			}
55
56
57	schorsch	2.22	extern int
58			headidval( /* get header id (return true if is id) */
59			register char *r,
60			register char *s
61			)
62	greg	2.4	{
63			register char *cp = HDRSTR;
64
65			while (cp) if (cp++ != *s++) return(0);
66			if (r == NULL) return(1);
67	gregl	2.9	while (s && !isspace(s)) r++ = s++;
68	greg	2.4	*r = '\0';
69			return(1);
70			}
71
72
73	schorsch	2.22	extern int
74			isheadid( /* check to see if line is header id */
75			char *s
76			)
77	greg	2.4	{
78			return(headidval(NULL, s));
79			}
80
81
82	schorsch	2.22	extern int
83			dateval( /* get capture date value */
84			time_t *tloc,
85			char *s
86			)
87	greg	2.11	{
88			struct tm tms;
89			register char *cp = TMSTR;
90
91			while (cp) if (cp++ != *s++) return(0);
92			while (isspace(*s)) s++;
93			if (!*s) return(0);
94			if (sscanf(s, "%d:%d:%d %d:%d:%d",
95			&tms.tm_year, &tms.tm_mon, &tms.tm_mday,
96			&tms.tm_hour, &tms.tm_min, &tms.tm_sec) != 6)
97			return(0);
98			if (tloc == NULL)
99			return(1);
100			tms.tm_mon--;
101			tms.tm_year -= 1900;
102			tms.tm_isdst = -1; /* ask mktime() to figure out DST */
103			*tloc = mktime(&tms);
104			return(1);
105			}
106
107
108	schorsch	2.22	extern int
109			isdate( /* is the given line a capture date? */
110			char *s
111			)
112	greg	2.11	{
113			return(dateval(NULL, s));
114			}
115
116
117	schorsch	2.22	extern void
118			fputdate( /* write out the given time value */
119			time_t tv,
120			FILE *fp
121			)
122	greg	2.11	{
123			struct tm *tm = localtime(&tv);
124			if (tm == NULL)
125			return;
126			fprintf(fp, "%s %04d:%02d:%02d %02d:%02d:%02d\n", TMSTR,
127			tm->tm_year+1900, tm->tm_mon+1, tm->tm_mday,
128			tm->tm_hour, tm->tm_min, tm->tm_sec);
129			}
130
131
132	schorsch	2.22	extern void
133			fputnow( /* write out the current time */
134			FILE *fp
135			)
136	greg	2.11	{
137			time_t tv;
138			time(&tv);
139			fputdate(tv, fp);
140			}
141
142
143	schorsch	2.22	extern void
144			printargs( /* print arguments to a file */
145			int ac,
146			char **av,
147			FILE *fp
148			)
149	greg	1.1	{
150			while (ac-- > 0) {
151	greg	2.11	fputword(*av++, fp);
152			fputc(ac ? ' ' : '\n', fp);
153	greg	1.1	}
154			}
155
156
157	schorsch	2.22	extern int
158			formatval( /* get format value (return true if format) */
159			register char *r,
160			register char *s
161			)
162	greg	1.2	{
163	greg	2.4	register char *cp = FMTSTR;
164
165			while (cp) if (cp++ != *s++) return(0);
166	greg	1.3	while (isspace(*s)) s++;
167	greg	2.4	if (!*s) return(0);
168			if (r == NULL) return(1);
169	greg	2.5	do
170			r++ = s++;
171			while(s && !isspace(s));
172	greg	1.2	*r = '\0';
173	greg	2.4	return(1);
174	greg	1.2	}
175
176
177	schorsch	2.22	extern int
178			isformat( /* is line a format line? */
179			char *s
180			)
181	greg	2.4	{
182			return(formatval(NULL, s));
183			}
184
185
186	schorsch	2.22	extern void
187			fputformat( /* put out a format value */
188			char *s,
189			FILE *fp
190			)
191	greg	1.2	{
192			fputs(FMTSTR, fp);
193			fputs(s, fp);
194			putc('\n', fp);
195			}
196
197
198	schorsch	2.22	extern int
199			getheader( /* get header from file */
200			FILE *fp,
201			gethfunc *f,
202			void *p
203			)
204	greg	1.1	{
205			char buf[MAXLINE];
206
207			for ( ; ; ) {
208			buf[MAXLINE-2] = '\n';
209	greg	2.3	if (fgets(buf, MAXLINE, fp) == NULL)
210	greg	1.1	return(-1);
211			if (buf[0] == '\n')
212			return(0);
213	greg	2.3	#ifdef MSDOS
214			if (buf[0] == '\r' && buf[1] == '\n')
215			return(0);
216			#endif
217	greg	1.1	if (buf[MAXLINE-2] != '\n') {
218			ungetc(buf[MAXLINE-2], fp); /* prevent false end */
219			buf[MAXLINE-2] = '\0';
220			}
221	gwlarson	2.10	if (f != NULL && (*f)(buf, p) < 0)
222			return(-1);
223	greg	1.1	}
224			}
225
226
227	greg	1.2	struct check {
228			FILE *fp;
229	greg	1.3	char fs[64];
230	greg	1.2	};
231	greg	1.1
232	greg	1.2
233	greg	2.11	static int
234	schorsch	2.22	mycheck( /* check a header line for format info. */
235			char *s,
236			void *cp
237			)
238			{
239			if (!formatval(((struct check*)cp)->fs, s)
240			&& ((struct check*)cp)->fp != NULL) {
241			fputs(s, ((struct check*)cp)->fp);
242			}
243	greg	2.11	return(0);
244	greg	1.1	}
245
246
247	schorsch	2.22	extern int
248			globmatch( /* check for match of s against pattern p */
249			register char *p,
250			register char *s
251			)
252	greg	1.3	{
253	greg	2.11	int setmatch;
254	greg	1.3
255			do {
256			switch (*p) {
257			case '?': /* match any character */
258			if (!*s++)
259			return(0);
260			break;
261			case '': / match any string */
262			while (p[1] == '*') p++;
263			do
264	greg	2.6	if ( (p[1]=='?' \|\| p[1]==*s) &&
265			globmatch(p+1,s) )
266	greg	1.3	return(1);
267			while (*s++);
268			return(0);
269	greg	2.11	case '[': /* character set */
270			setmatch = s == ++p;
271			if (!*p)
272			return(0);
273			while (*++p != ']') {
274			if (!*p)
275			return(0);
276			if (*p == '-') {
277			setmatch += p[-1] <= s && s <= p[1];
278			if (!*++p)
279			break;
280			} else
281			setmatch += p == s;
282			}
283			if (!setmatch)
284			return(0);
285			s++;
286			break;
287	greg	1.3	case '\\': /* literal next */
288			p++;
289			/* fall through */
290			default: /* normal character */
291			if (p != s)
292			return(0);
293			s++;
294			break;
295			}
296			} while (*p++);
297			return(1);
298			}
299
300
301			/*
302			* Checkheader(fin,fmt,fout) returns a value of 1 if the input format
303			* matches the specification in fmt, 0 if no input format was found,
304			* and -1 if the input format does not match or there is an
305	greg	1.4	* error reading the header. If fmt is empty, then -1 is returned
306	greg	1.3	* if any input format is found (or there is an error), and 0 otherwise.
307			* If fmt contains any '*' or '?' characters, then checkheader
308			* does wildcard expansion and copies a matching result into fmt.
309	greg	2.7	* Be sure that fmt is big enough to hold the match in such cases,
310			* and that it is not a static, read-only string!
311	greg	1.3	* The input header (minus any format lines) is copied to fout
312			* if fout is not NULL.
313			*/
314
315	schorsch	2.22	extern int
316			checkheader(
317			FILE *fin,
318			char *fmt,
319			FILE *fout
320			)
321	greg	1.1	{
322	greg	1.2	struct check cdat;
323	greg	2.7	register char *cp;
324	greg	1.2
325			cdat.fp = fout;
326			cdat.fs[0] = '\0';
327	schorsch	2.22	if (getheader(fin, mycheck, &cdat) < 0)
328	greg	1.3	return(-1);
329	greg	2.6	if (!cdat.fs[0])
330			return(0);
331	greg	2.7	for (cp = fmt; cp; cp++) / check for globbing */
332	schorsch	2.20	if ((cp == '?') \| (cp == '*')) {
333	greg	2.7	if (globmatch(fmt, cdat.fs)) {
334			strcpy(fmt, cdat.fs);
335			return(1);
336			} else
337			return(-1);
338	schorsch	2.19	}
339	greg	2.7	return(strcmp(fmt, cdat.fs) ? -1 : 1); /* literal match */
340	greg	1.1	}