src/common/loadvars.c

#ifndef lint
static const char       RCSid[] = "$Id: loadvars.c,v 2.20 2023/06/10 15:49:55 greg Exp $";
#endif
/*
 *  Routines for loading and checking variables from file.
 */

#include "copyright.h"

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>

#include "standard.h"
#include "vars.h"

#define NOCHAR  127             /* constant for character to delete */

extern char  *fgetline();


void
loadvars(                       /* load variables into vv from file */
        const char      *rfname
)
{
        FILE    *fp;
        char    buf[512];
        char    *cp;

        if (rfname == NULL)
                fp = stdin;
        else if ((fp = fopen(rfname, "r")) == NULL) {
                perror(rfname);
                quit(1);
        }
        while (fgetline(buf, sizeof(buf), fp) != NULL) {
                for (cp = buf; *cp; cp++) {
                        switch (*cp) {
                        case '\\':
                                *cp++ = NOCHAR;
                                continue;
                        case '#':
                                *cp = '\0';
                                break;
                        default:
                                continue;
                        }
                        break;
                }
                if (setvariable(buf, matchvar) < 0) {
                        fprintf(stderr, "%s: unknown variable: %s\n",
                                        rfname, buf);
                        quit(1);
                }
        }
        if (fp != stdin)
                fclose(fp);
}


int
setvariable(                    /* assign variable according to string */
        const char      *ass,
        VARIABLE        *(*mv)(const char*)
)
{
        int     quote = '\0';
        char    varname[32];
        int     n;
        char    *cp;
        VARIABLE        *vp;
        int     i;

        while (isspace(*ass))           /* skip leading space */
                ass++;
        cp = varname;                   /* extract name */
        while (cp < varname+sizeof(varname)-1
                        && *ass && !isspace(*ass) && *ass != '=')
                *cp++ = *ass++;
        *cp = '\0';
        if (!varname[0])
                return(0);      /* no variable name! */
                                        /* trim value */
        while (isspace(*ass) || *ass == '=')
                ass++;
        for (n = strlen(ass); n > 0; n--)
                if (!isspace(ass[n-1]))
                        break;
        if (!n)
                return(0);      /* no assignment */
                                        /* match variable from list */
        vp = (*mv)(varname);
        if (vp == NULL)
                return(-1);
                                        /* assign new value */
        if ( (i = vp->nass) ) {
                cp = vp->value;
                while (i--)
                        while (*cp++)
                                ;
                i = cp - vp->value;
                vp->value = (char *)realloc((void *)vp->value, i+n+1);
        } else
                vp->value = (char *)malloc(n+1);
        if (vp->value == NULL) {
                perror(progname);
                quit(1);
        }
        cp = vp->value+i;               /* copy value */
        *cp = *ass;
        for (i = 1; i <= n; i++) {
                if (ass[i] == NOCHAR)
                        continue;
                if (quote) {            /* don't change quoted parts */
                        quote *= (ass[i] != quote);
                } else {                /* otherwise, squeeze spaces */
                        if (isspace(*cp))
                                while (isspace(ass[i])|(ass[i]==NOCHAR))
                                        i++;
                        if ((ass[i] == '"') | (ass[i] == '\''))
                                quote = ass[i];
                }
                *++cp = ass[i];
        }
        if (isspace(*cp))               /* remove trailing space */
                *cp = '\0';
        return(++vp->nass);
}


VARIABLE *
matchvar(                       /* match a variable by its name */
        const char      *nam
)
{
        int     n = strlen(nam);
        int     i;

        for (i = 0; i < NVARS; i++)
                if (n >= vv[i].nick && !strncmp(nam, vv[i].name, n))
                        return(vv+i);
        return(NULL);
}


char *
nvalue(                         /* return nth variable value */
        int     vn,
        int     n
)
{
        char    *cp;

        if ((vval(vn) == NULL) | (n < 0) | (n >= vdef(vn)))
                return(NULL);
        cp = vval(vn);
        while (n--)
                while (*cp++)
                        ;
        return(cp);
}


void
checkvalues(void)               /* check assignments */
{
        int     i;

        for (i = 0; i < NVARS; i++)
                if (vv[i].fixval != NULL)
                        (*vv[i].fixval)(vv+i);
}


void
onevalue(                       /* only one assignment for this variable */
        VARIABLE        *vp
)
{
        if (vp->nass < 2)
                return;
        if (!nowarn)
                fprintf(stderr,
                "%s: warning - multiple assignment of variable '%s'\n",
                        progname, vp->name);
        do
                vp->value += strlen(vp->value)+1;
        while (--vp->nass > 1);
}


void
catvalues(                      /* concatenate variable values */
        VARIABLE        *vp
)
{
        char    *cp;

        if (vp->nass < 2)
                return;
        for (cp = vp->value; vp->nass > 1; vp->nass--) {
                while (*cp)
                        cp++;
                *cp++ = ' ';
        }
}


int
badmatch(                       /* case insensitive truncated comparison */
        char    *tv,
        char    *cv
)
{
        if (!*tv) return(1);            /* null string cannot match */
        do
                if (UPPER(*tv) != *cv++)
                        return(1);
        while (*++tv);
        return(0);              /* OK */
}


void
boolvalue(                      /* check boolean for legal values */
        VARIABLE        *vp
)
{
        if (!vp->nass) return;
        onevalue(vp);
        switch (UPPER(vp->value[0])) {
        case 'T':
                if (badmatch(vp->value, "TRUE")) break;
                return;
        case 'F':
                if (badmatch(vp->value, "FALSE")) break;
                return;
        }
        fprintf(stderr, "%s: illegal value for boolean variable '%s'\n",
                        progname, vp->name);
        quit(1);
}


void
qualvalue(                      /* check qualitative var. for legal values */
        VARIABLE        *vp
)
{
        if (!vp->nass) return;
        onevalue(vp);
        switch (UPPER(vp->value[0])) {
        case 'L':
                if (badmatch(vp->value, "LOW")) break;
                return;
        case 'M':
                if (badmatch(vp->value, "MEDIUM")) break;
                return;
        case 'H':
                if (badmatch(vp->value, "HIGH")) break;
                return;
        }
        fprintf(stderr, "%s: illegal value for qualitative variable '%s'\n",
                        progname, vp->name);
        quit(1);
}

void
strvalue(                               /* check for single (quoted) string value */
        VARIABLE        *vp
)
{
        if (!vp->nass) return;
        onevalue(vp);
        if ((vp->value[0] == '"') | (vp->value[0] == '\'')) {
                char    *cp = vp->value + strlen(vp->value+1);
                if ((cp != vp->value) & (*cp == vp->value[0])) {
                        vp->value++;    /* elide quotation marks */
                        *cp = '\0';
                }
        }
}


void
intvalue(                               /* check integer variable for legal values */
        VARIABLE        *vp
)
{
        if (!vp->nass) return;
        onevalue(vp);
        if (isint(vp->value)) return;
        fprintf(stderr, "%s: illegal value for integer variable '%s'\n",
                        progname, vp->name);
        quit(1);
}


void
fltvalue(                               /* check float variable for legal values */
        VARIABLE        *vp
)
{
        if (!vp->nass) return;
        onevalue(vp);
        if (isflt(vp->value)) return;
        fprintf(stderr, "%s: illegal value for real variable '%s'\n",
                        progname, vp->name);
        quit(1);
}


void
printvars(                              /* print variable values */
        FILE    *fp
)
{
        int     i, j, k, clipline;
        char    *cp;

        for (i = 0; i < NVARS; i++)             /* print each variable */
            for (j = 0; j < vdef(i); j++) {     /* print each assignment */
                fputs(vnam(i), fp);
                fputs("= ", fp);
                k = clipline = ( vv[i].fixval == catvalues ? 64 : 236 )
                                - strlen(vnam(i)) ;
                cp = nvalue(i, j);
                while (*cp) {
                    putc(*cp++, fp);
                    if (--k <= 0) {             /* line too long */
                        while (*cp && !isspace(*cp))
                            fputc(*cp++, fp);   /* finish this word */
                        if (*cp) {              /* start new line */
                            if (vv[i].fixval == catvalues) {
                                fputc('\n', fp);
                                fputs(vnam(i), fp);
                                fputc('=', fp);
                            } else
                                fputs(" \\\n", fp);
                            k = clipline;
                        }
                    }
                }
                fputc('\n', fp);
            }
        fflush(fp);
}
Revision:	2.21
Committed:	Sat Jun 10 20:20:51 2023 UTC (11 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad5R4, HEAD
Changes since 2.20:	+2 -2 lines
Log Message:	fix: Now squeezes unquoted spaces across escaped newlines
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.21	static const char RCSid[] = "$Id: loadvars.c,v 2.20 2023/06/10 15:49:55 greg Exp $";
3	greg	2.1	#endif
4			/*
5			* Routines for loading and checking variables from file.
6			*/
7
8	greg	2.10	#include "copyright.h"
9	greg	2.9
10	greg	2.1	#include <stdio.h>
11	greg	2.9	#include <stdlib.h>
12	greg	2.1	#include <ctype.h>
13	schorsch	2.12
14			#include "standard.h"
15	greg	2.1	#include "vars.h"
16
17			#define NOCHAR 127 /* constant for character to delete */
18
19	greg	2.4	extern char *fgetline();
20
21	greg	2.1
22	greg	2.9	void
23	greg	2.15	loadvars( /* load variables into vv from file */
24	greg	2.17	const char *rfname
25	greg	2.15	)
26	greg	2.1	{
27			FILE *fp;
28			char buf[512];
29	greg	2.15	char *cp;
30	greg	2.1
31			if (rfname == NULL)
32			fp = stdin;
33			else if ((fp = fopen(rfname, "r")) == NULL) {
34			perror(rfname);
35	greg	2.5	quit(1);
36	greg	2.1	}
37			while (fgetline(buf, sizeof(buf), fp) != NULL) {
38			for (cp = buf; *cp; cp++) {
39			switch (*cp) {
40			case '\\':
41			*cp++ = NOCHAR;
42			continue;
43			case '#':
44			*cp = '\0';
45			break;
46			default:
47			continue;
48			}
49			break;
50			}
51	greg	2.6	if (setvariable(buf, matchvar) < 0) {
52			fprintf(stderr, "%s: unknown variable: %s\n",
53			rfname, buf);
54			quit(1);
55			}
56	greg	2.1	}
57	greg	2.16	if (fp != stdin)
58			fclose(fp);
59	greg	2.1	}
60
61
62	greg	2.6	int
63	greg	2.15	setvariable( /* assign variable according to string */
64	greg	2.17	const char *ass,
65	greg	2.18	VARIABLE (mv)(const char*)
66	greg	2.15	)
67	greg	2.1	{
68	greg	2.19	int quote = '\0';
69	greg	2.1	char varname[32];
70			int n;
71	greg	2.15	char *cp;
72			VARIABLE *vp;
73			int i;
74	greg	2.1
75			while (isspace(ass)) / skip leading space */
76			ass++;
77			cp = varname; /* extract name */
78			while (cp < varname+sizeof(varname)-1
79			&& ass && !isspace(ass) && *ass != '=')
80			cp++ = ass++;
81			*cp = '\0';
82			if (!varname[0])
83	greg	2.6	return(0); /* no variable name! */
84	greg	2.1	/* trim value */
85			while (isspace(ass) \|\| ass == '=')
86			ass++;
87			for (n = strlen(ass); n > 0; n--)
88			if (!isspace(ass[n-1]))
89			break;
90	greg	2.6	if (!n)
91			return(0); /* no assignment */
92	greg	2.1	/* match variable from list */
93	greg	2.6	vp = (*mv)(varname);
94			if (vp == NULL)
95			return(-1);
96	greg	2.1	/* assign new value */
97	schorsch	2.13	if ( (i = vp->nass) ) {
98	greg	2.1	cp = vp->value;
99			while (i--)
100			while (*cp++)
101			;
102			i = cp - vp->value;
103	greg	2.11	vp->value = (char )realloc((void )vp->value, i+n+1);
104	greg	2.1	} else
105	greg	2.9	vp->value = (char *)malloc(n+1);
106	greg	2.1	if (vp->value == NULL) {
107			perror(progname);
108	greg	2.5	quit(1);
109	greg	2.1	}
110	greg	2.19	cp = vp->value+i; /* copy value */
111	greg	2.1	cp = ass;
112			for (i = 1; i <= n; i++) {
113			if (ass[i] == NOCHAR)
114			continue;
115	greg	2.19	if (quote) { /* don't change quoted parts */
116			quote *= (ass[i] != quote);
117			} else { /* otherwise, squeeze spaces */
118			if (isspace(*cp))
119	greg	2.21	while (isspace(ass[i])\|(ass[i]==NOCHAR))
120	greg	2.19	i++;
121			if ((ass[i] == '"') \| (ass[i] == '\''))
122			quote = ass[i];
123			}
124	greg	2.1	*++cp = ass[i];
125			}
126			if (isspace(cp)) / remove trailing space */
127			*cp = '\0';
128	greg	2.6	return(++vp->nass);
129	greg	2.1	}
130
131
132			VARIABLE *
133	greg	2.15	matchvar( /* match a variable by its name */
134	greg	2.17	const char *nam
135	greg	2.15	)
136	greg	2.1	{
137			int n = strlen(nam);
138	greg	2.15	int i;
139	greg	2.1
140			for (i = 0; i < NVARS; i++)
141			if (n >= vv[i].nick && !strncmp(nam, vv[i].name, n))
142			return(vv+i);
143			return(NULL);
144			}
145
146
147			char *
148	greg	2.15	nvalue( /* return nth variable value */
149			int vn,
150			int n
151			)
152	greg	2.1	{
153	greg	2.15	char *cp;
154	greg	2.1
155	schorsch	2.13	if ((vval(vn) == NULL) \| (n < 0) \| (n >= vdef(vn)))
156	greg	2.1	return(NULL);
157	greg	2.2	cp = vval(vn);
158	greg	2.1	while (n--)
159			while (*cp++)
160			;
161			return(cp);
162			}
163
164
165	greg	2.9	void
166	greg	2.15	checkvalues(void) /* check assignments */
167	greg	2.1	{
168	greg	2.15	int i;
169	greg	2.1
170			for (i = 0; i < NVARS; i++)
171			if (vv[i].fixval != NULL)
172			(*vv[i].fixval)(vv+i);
173			}
174
175
176	greg	2.9	void
177	greg	2.15	onevalue( /* only one assignment for this variable */
178			VARIABLE *vp
179			)
180	greg	2.1	{
181			if (vp->nass < 2)
182			return;
183			if (!nowarn)
184			fprintf(stderr,
185			"%s: warning - multiple assignment of variable '%s'\n",
186			progname, vp->name);
187			do
188			vp->value += strlen(vp->value)+1;
189			while (--vp->nass > 1);
190			}
191
192
193	greg	2.9	void
194	greg	2.15	catvalues( /* concatenate variable values */
195			VARIABLE *vp
196			)
197	greg	2.1	{
198	greg	2.15	char *cp;
199	greg	2.1
200			if (vp->nass < 2)
201			return;
202			for (cp = vp->value; vp->nass > 1; vp->nass--) {
203			while (*cp)
204			cp++;
205			*cp++ = ' ';
206			}
207			}
208
209
210			int
211	greg	2.15	badmatch( /* case insensitive truncated comparison */
212			char *tv,
213			char *cv
214			)
215	greg	2.1	{
216			if (!tv) return(1); / null string cannot match */
217			do
218			if (UPPER(tv) != cv++)
219			return(1);
220			while (*++tv);
221			return(0); /* OK */
222			}
223
224
225	greg	2.9	void
226	greg	2.15	boolvalue( /* check boolean for legal values */
227			VARIABLE *vp
228			)
229	greg	2.1	{
230			if (!vp->nass) return;
231			onevalue(vp);
232			switch (UPPER(vp->value[0])) {
233			case 'T':
234			if (badmatch(vp->value, "TRUE")) break;
235			return;
236			case 'F':
237			if (badmatch(vp->value, "FALSE")) break;
238			return;
239			}
240			fprintf(stderr, "%s: illegal value for boolean variable '%s'\n",
241			progname, vp->name);
242	greg	2.5	quit(1);
243	greg	2.1	}
244
245
246	greg	2.9	void
247	greg	2.15	qualvalue( /* check qualitative var. for legal values */
248			VARIABLE *vp
249			)
250	greg	2.1	{
251			if (!vp->nass) return;
252			onevalue(vp);
253			switch (UPPER(vp->value[0])) {
254			case 'L':
255			if (badmatch(vp->value, "LOW")) break;
256			return;
257			case 'M':
258			if (badmatch(vp->value, "MEDIUM")) break;
259			return;
260			case 'H':
261			if (badmatch(vp->value, "HIGH")) break;
262			return;
263			}
264			fprintf(stderr, "%s: illegal value for qualitative variable '%s'\n",
265			progname, vp->name);
266	greg	2.5	quit(1);
267	greg	2.1	}
268
269	greg	2.20	void
270			strvalue( /* check for single (quoted) string value */
271			VARIABLE *vp
272			)
273			{
274			if (!vp->nass) return;
275			onevalue(vp);
276			if ((vp->value[0] == '"') \| (vp->value[0] == '\'')) {
277			char *cp = vp->value + strlen(vp->value+1);
278			if ((cp != vp->value) & (*cp == vp->value[0])) {
279			vp->value++; /* elide quotation marks */
280			*cp = '\0';
281			}
282			}
283			}
284
285	greg	2.1
286	greg	2.9	void
287	greg	2.15	intvalue( /* check integer variable for legal values */
288			VARIABLE *vp
289			)
290	greg	2.1	{
291			if (!vp->nass) return;
292			onevalue(vp);
293			if (isint(vp->value)) return;
294			fprintf(stderr, "%s: illegal value for integer variable '%s'\n",
295			progname, vp->name);
296	greg	2.5	quit(1);
297	greg	2.1	}
298
299
300	greg	2.9	void
301	greg	2.15	fltvalue( /* check float variable for legal values */
302			VARIABLE *vp
303			)
304	greg	2.1	{
305			if (!vp->nass) return;
306			onevalue(vp);
307			if (isflt(vp->value)) return;
308			fprintf(stderr, "%s: illegal value for real variable '%s'\n",
309			progname, vp->name);
310	greg	2.5	quit(1);
311	greg	2.1	}
312
313
314	greg	2.9	void
315	greg	2.15	printvars( /* print variable values */
316			FILE *fp
317			)
318	greg	2.1	{
319			int i, j, k, clipline;
320	greg	2.15	char *cp;
321	greg	2.1
322			for (i = 0; i < NVARS; i++) /* print each variable */
323			for (j = 0; j < vdef(i); j++) { /* print each assignment */
324			fputs(vnam(i), fp);
325			fputs("= ", fp);
326	gwlarson	2.8	k = clipline = ( vv[i].fixval == catvalues ? 64 : 236 )
327	greg	2.1	- strlen(vnam(i)) ;
328	greg	2.2	cp = nvalue(i, j);
329	greg	2.1	while (*cp) {
330			putc(*cp++, fp);
331			if (--k <= 0) { /* line too long */
332			while (cp && !isspace(cp))
333	gwlarson	2.7	fputc(cp++, fp); / finish this word */
334	greg	2.1	if (cp) { / start new line */
335	gwlarson	2.7	if (vv[i].fixval == catvalues) {
336			fputc('\n', fp);
337			fputs(vnam(i), fp);
338			fputc('=', fp);
339			} else
340			fputs(" \\\n", fp);
341	greg	2.1	k = clipline;
342			}
343			}
344			}
345	gwlarson	2.7	fputc('\n', fp);
346	greg	2.1	}
347			fflush(fp);
348			}