X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=src%2Frrd_graph_helper.c;h=a33a8ef8641000ed8fcd9634abc297e2523bc097;hb=9106f186793f0bb8ed8b1849a1f6df295eb6b181;hp=d325bf0ae538f6dd45799a2804b65bcc8abdbc3d;hpb=47fb0693421e20cd23730a24c724cc44c38c145b;p=rrdtool.git

diff --git a/src/rrd_graph_helper.c b/src/rrd_graph_helper.c
index d325bf0..a33a8ef 100644
--- a/src/rrd_graph_helper.c
+++ b/src/rrd_graph_helper.c
@@ -1,81 +1,507 @@
-/**********************************************************
- *** Several generic helper functions for rrd_graph.c   ***
- **********************************************************/
-
 #include "rrd_graph.h"
-#include "rrd_graph_helper.h"
-
-/**********************************************************
- *** Helper functions for parsing command file          ***
- **********************************************************/
-
-/* Parse a VNAME followed by an equal sign ( CDEF:VNAME= )
- *
- * Input:	pointer to argv
- * Input:	pointer to im structure
- * Input:	pointer to error string
- * Output:	number of chars eaten (0 means error)
- *
- * Usage:	n=parse_vname( &argv[i][argstart],&im, "VDEF");
- *		if (n==0) { error } else { argstart+=n };
- */
+
+#define dprintf if (gdp->debug) printf
+
 int
-parse_vname1(cptr,im,err)
-char *		cptr;
-image_desc_t *	im;
-char *		err;
-{
-    int		n=0,vidx;
-
-    sscanf(cptr, DEF_NAM_FMT "=%n",im->gdes[im->gdes_c-1].vname,&n);
-
-    /* Check if the sequence matches, including the
-     * terminating equal sign */
-    if (n==0) {
-	im_free(im);
-	rrd_set_error("Can't parse VNAME in %s: '%s'",err,cptr);
-	return 0;
+rrd_parse_find_gf(char *line, unsigned int *eaten, graph_desc_t *gdp) {
+    char funcname[11],c1=0,c2=0;
+    int i=0;
+
+    sscanf(&line[*eaten], "DEBUG%n", &i);
+    if (i) {
+	gdp->debug=1;
+	(*eaten)+=i;
+	i=0;
+	dprintf("Scanning line '%s'\n",&line[*eaten]);
+    }
+    sscanf(&line[*eaten], "%10[A-Z]%n%c%c", funcname, &i, &c1, &c2);
+    if (!i) {
+	rrd_set_error("Could not make sense out of '%s'",line);
+	return 1;
+    }
+    if ((int)(gdp->gf=gf_conv(funcname)) == -1) {
+	rrd_set_error("'%s' is not a valid function name", funcname);
+	return 1;
     }
+    if (gdp->gf == GF_LINE) {
+	if (c1 < '1' || c1 > '3' || c2 != ':') {
+	    rrd_set_error("Malformed LINE command: %s",line);
+	    return 1;
+	}
+	gdp->linewidth=c1-'0';
+	i++;
+    } else {
+	if (c1 != ':') {
+	    rrd_set_error("Malformed %s command: %s",funcname,line);
+	    return 1;
+	}
+    }
+    *eaten+=++i;
+    return 0;
+}
 
-    /* Check if this is an unused variable */
-    vidx=find_var(im,im->gdes[im->gdes_c-1].vname);
-    if (vidx!=-1) {
-	switch(im->gdes[vidx].gf) {
-	    case GF_DEF:
-		rrd_set_error("Duplicate variable in %s: '%s' defined as DEF",
-			err,im->gdes[im->gdes_c-1].vname);
-		break;
-	    case GF_CDEF:
-		rrd_set_error("Duplicate variable in %s: '%s' defined as CDEF",
-			err,im->gdes[im->gdes_c-1].vname);
-		break;
-	    case GF_VDEF:
-		rrd_set_error("Duplicate variable in %s: '%s' defined as VDEF",
-			err,im->gdes[im->gdes_c-1].vname);
-		break;
-	    default:
-		rrd_set_error("Duplicate variable in %s: '%s' defined",
-			err,im->gdes[im->gdes_c-1].vname);
-		break;
-	};
-	im_free(im);
+int
+rrd_parse_legend(char *line, unsigned int *eaten, graph_desc_t *gdp) {
+    int i;
+
+    dprintf("- examining '%s'\n",&line[*eaten]);
+
+    i=scan_for_col(&line[*eaten],FMT_LEG_LEN,gdp->legend);
+
+    *eaten += i;
+    if (line[*eaten]!='\0' && line[*eaten]!=':') {
+	rrd_set_error("Legend too long");
+	return 1;
+    } else {
+	dprintf("- found legend '%s'\n", gdp->legend);
 	return 0;
     }
+}
+
+int
+rrd_parse_color(char *string, graph_desc_t *gdp) {
+    unsigned int r=0,g=0,b=0,a=0;
+    int i1=0,i2=0,i3=0;
+
+    if (string[0] != '#') return 1;
+    sscanf(string, "#%02x%02x%02x%n%02x%n%*s%n",
+				&r,&g,&b,&i1,&a,&i2,&i3);
+
+    if (i3) return 1; /* garbage after color */
+    if (!i2) a=0xFF;
+    if (!i1) return 1; /* no color after '#' */
+    gdp->col = r<<24|g<<16|b<<8|a;
+    return 0;
+}
+
+int
+rrd_parse_CF(char *line, unsigned int *eaten, graph_desc_t *gdp) {
+    char 		symname[CF_NAM_SIZE];
+    int			i=0;
+
+    sscanf(&line[*eaten], CF_NAM_FMT "%n", symname,&i);
+    if ((!i)||((line[*eaten+i]!='\0')&&(line[*eaten+i]!=':'))) {
+	rrd_set_error("Cannot parse CF in '%s'",line);
+	return 1;
+    }
+    (*eaten)+=i;
+    dprintf("- using CF '%s'\n",symname);
 
-    /* VNAME must start with a character other than numeric */
-    if (isdigit(im->gdes[im->gdes_c-1].vname[0])) {
-	rrd_set_error("Variable in %s starts with a digit: '%s'",
-		err,im->gdes[im->gdes_c-1].vname);
-	im_free(im);
+    if ((int)(gdp->cf = cf_conv(symname))==-1) {
+	rrd_set_error("Unknown CF '%s' in '%s'",symname,line);
+	return 1;
+    }
+
+    if (line[*eaten]!='\0') (*eaten)++;
+    return 0;
+}
+
+/* Parsing old-style xPRINT and new-style xPRINT */
+int
+rrd_parse_print(char *line, unsigned int *eaten, graph_desc_t *gdp, image_desc_t *im) {
+    /* vname:CF:format in case of DEF-based vname
+    ** vname:CF:format in case of CDEF-based vname
+    ** vname:format in case of VDEF-based vname
+    */
+    char tmpstr[MAX_VNAME_LEN+1];
+    int i=0;
+
+    sscanf(&line[*eaten], DEF_NAM_FMT ":%n", tmpstr,&i);
+    if (!i) {
+	rrd_set_error("Could not parse line '%s'",line);
+	return 1;
+    }
+    (*eaten)+=i;
+    dprintf("- Found candidate vname '%s'\n",tmpstr);
+
+    if ((gdp->vidx=find_var(im,tmpstr))<0) {
+	rrd_set_error("Not a valid vname: %s in line %s",tmpstr,line);
+	return 1;
+    }
+    switch (im->gdes[gdp->vidx].gf) {
+	case GF_DEF:
+	case GF_CDEF:
+	    dprintf("- vname is of type DEF or CDEF, looking for CF\n");
+	    if (rrd_parse_CF(line,eaten,gdp)) return 1;
+	    break;
+	case GF_VDEF:
+	    dprintf("- vname is of type VDEF\n");
+	    break;
+	default:
+	    rrd_set_error("Encountered unknown type variable '%s'",tmpstr);
+	    return 1;
+    }
+
+    if (rrd_parse_legend(line,eaten,gdp)) return 1;
+
+    /* Why is there a separate structure member "format" ??? */
+    strcpy(gdp->format,gdp->legend);
+
+    return 0;
+}
+
+/* Parsing of PART, VRULE, HRULE, LINE, AREA, STACK and TICK
+** is done in one function.  Stacking STACK is silently ignored
+** as it is redundant.  Stacking PART, VRULE, HRULE or TICK is
+** not allowed.  The check for color doesn't need to be so strict
+** anymore, the user can specify the color '#00000000' and
+** effectively circumvent this check, so why bother.
+**
+** If a number (which is valid to enter) is more than a
+** certain amount of characters, it is caught as an error.
+** While this is arguable, so is entering fixed numbers
+** with more than MAX_VNAME_LEN significant digits.
+*/
+int
+rrd_parse_PVHLAST(char *line, unsigned int *eaten, graph_desc_t *gdp, image_desc_t *im) {
+    int i,j;
+    int colorfound=0;
+    char tmpstr[MAX_VNAME_LEN + 10];	/* vname#RRGGBBAA\0 */
+
+    dprintf("- parsing '%s'\n",&line[*eaten]);
+    dprintf("- from line '%s'\n",line);
+
+    i=scan_for_col(&line[*eaten],MAX_VNAME_LEN+9,tmpstr);
+    if (line[*eaten+i]!='\0' && line[*eaten+i]!=':') {
+	rrd_set_error("Cannot parse line '%s'",line);
+	return 1;
+    }
+
+    j=i; while (j>0 && tmpstr[j]!='#') j--;
+
+    if (tmpstr[j]=='#') {
+	if (rrd_parse_color(&tmpstr[j],gdp)) {
+	    rrd_set_error("Could not parse color in '%s'",tmpstr[j]);
+	    return 1;
+	}
+	tmpstr[j]='\0';
+	dprintf("- parsed color 0x%08x\n",(unsigned int)gdp->col);
+	colorfound=1;
+    }
+
+    dprintf("- examining '%s'\n",tmpstr);
+    j=0;
+    if (gdp->gf == GF_VRULE) {
+	sscanf(tmpstr,"%li%n",&gdp->xrule,&j);
+	if (j) dprintf("- found time: %li\n",gdp->xrule);
+    } else {
+	sscanf(tmpstr,"%lf%n",&gdp->yrule,&j);
+	if (j) dprintf("- found number: %f\n",gdp->yrule);
+    }
+    if (!j) {
+	if ((gdp->vidx=find_var(im,tmpstr))<0) {
+	    rrd_set_error("Not a valid vname: %s in line %s",tmpstr,line);
+	    return 1;
+	}
+	dprintf("- found vname: '%s' vidx %li\n",tmpstr,gdp->vidx);
+    }
+    /* "*eaten" is still pointing to the original location,
+    ** "*eaten +i" is pointing to the character after the color
+    ** or to the terminating '\0' in which case we're finished.
+    */
+    if (line[*eaten+i]=='\0') {
+	*eaten+=i;
 	return 0;
-    };
+    }
+    *eaten+=++i;
+
+    /* If a color is specified and the only remaining part is
+    ** ":STACK" then it is assumed to be the legend.  An empty
+    ** legend can be specified as expected.  This means the
+    ** following can be done:  LINE1:x#FF0000FF::STACK
+    */
+    if (colorfound) { /* no legend if no color */
+	if (gdp->gf == GF_TICK) {
+	    dprintf("- looking for optional number\n");
+	    sscanf(&line[*eaten],"%lf:%n",&gdp->yrule,&j);
+	    if (j) {
+		dprintf("- found number %f\n",gdp->yrule);
+		(*eaten)+=j;
+		if (gdp->yrule > 1.0 || gdp->yrule < -1.0) {
+		    rrd_set_error("Tick factor should be <= 1.0");
+		    return 1;
+		}
+	    } else {
+		dprintf("- not found, defaulting to 0.1\n");
+		gdp->yrule=0.1;
+		return 0;
+	    }
+	}
+	dprintf("- looking for optional legend\n");
+	dprintf("- in '%s'\n",&line[*eaten]);
+	if (rrd_parse_legend(line, eaten, gdp)) return 1;
+    }
+
+    /* PART, HRULE, VRULE and TICK cannot be stacked.  We're finished */
+    if (   (gdp->gf == GF_HRULE)
+	|| (gdp->gf == GF_VRULE)
+	|| (gdp->gf == GF_PART)
+	|| (gdp->gf == GF_TICK)
+	) return 0;
+
+    if (line[*eaten]!='\0') {
+	dprintf("- still more, should be STACK\n");
+	(*eaten)++;
+	j=scan_for_col(&line[*eaten],5,tmpstr);
+	if (line[*eaten+j]!='\0') {
+	    rrd_set_error("Garbage found where STACK expected");
+	    return 1;
+	}
+	if (!strcmp("STACK",tmpstr)) {
+	    dprintf("- found STACK\n");
+	    gdp->stack=1;
+	    (*eaten)+=5;
+	} else {
+	    rrd_set_error("Garbage found where STACK expected");
+	    return 1;
+	}
+    }
+
+    return 0;
+}
+
+int
+rrd_parse_vname(char *line, unsigned int *eaten, graph_desc_t *gdp, image_desc_t *im) {
+    char tmpstr[MAX_VNAME_LEN + 10];
+    int i=0;
 
-    /* Reserved words checking.  Not at the moment. */
+    sscanf(&line[*eaten], DEF_NAM_FMT "=%n", tmpstr,&i);
+    if (!i) {
+	rrd_set_error("Cannot parse vname from '%s'",line);
+	return 1;
+    }
+    dprintf("- found candidate '%s'\n",tmpstr);
 
-    return n;
+    if ((gdp->vidx=find_var(im,tmpstr))>=0) {
+	rrd_set_error("Attempting to reuse '%s'",im->gdes[gdp->vidx].vname);
+	return 1;
+    }
+    strcpy(gdp->vname,tmpstr);
+    dprintf("- created vname '%s' vidx %lu\n", gdp->vname,im->gdes_c-1);
+    (*eaten)+=i;
+    return 0;
 }
 
-/**********************************************************
- ***                                                    ***
- **********************************************************/
+int
+rrd_parse_def(char *line, unsigned int *eaten, graph_desc_t *gdp, image_desc_t *im) {
+    int			i=0;
+    char 		command[6]; /* step, start, end */
+    char		tmpstr[256];
+    struct time_value	start_tv,end_tv;
+    time_t		start_tmp=0,end_tmp=0;
+    char		*parsetime_error=NULL;
+
+    start_tv.type   = end_tv.type=ABSOLUTE_TIME;
+    start_tv.offset = end_tv.offset=0;
+    localtime_r(&gdp->start, &start_tv.tm);
+    localtime_r(&gdp->end, &end_tv.tm);
+    
+    dprintf("- parsing '%s'\n",&line[*eaten]);
+    dprintf("- from line '%s'\n",line);
+
+    if (rrd_parse_vname(line,eaten,gdp,im)) return 1;
+    i=scan_for_col(&line[*eaten],254,gdp->rrd);
+    if (line[*eaten+i]!=':') {
+	rrd_set_error("Problems reading database name");
+	return 1;
+    }
+    (*eaten)+=++i;
+    dprintf("- using file '%s'\n",gdp->rrd);
+
+    i=0;
+    sscanf(&line[*eaten], DS_NAM_FMT ":%n", gdp->ds_nam,&i);
+    if (!i) {
+	rrd_set_error("Cannot parse DS in '%s'",line);
+	return 1;
+    }
+    (*eaten)+=i;
+    dprintf("- using DS '%s'\n",gdp->ds_nam);
+
+    if (rrd_parse_CF(line,eaten,gdp)) return 1;
+
+    if (line[*eaten]=='\0') return 0;
+
+    while (1) {
+	dprintf("- optional parameter follows: %s\n", &line[*eaten]);
+	i=0;
+	sscanf(&line[*eaten], "%5[a-z]=%n", command, &i);
+	if (!i) {
+	    rrd_set_error("Parse error in '%s'",line);
+	    return 1;
+	}
+	(*eaten)+=i;
+	dprintf("- processing '%s'\n",command);
+	if (!strcmp("step",command)) {
+	    i=0;
+	    sscanf(&line[*eaten],"%lu%n",&gdp->step,&i);
+	    (*eaten)+=i;
+	    dprintf("- using step %lu\n",gdp->step);
+	} else if (!strcmp("start",command)) {
+	    i=scan_for_col(&line[*eaten],255,tmpstr);
+	    (*eaten)+=i;
+	    if ((parsetime_error = parsetime(tmpstr, &start_tv))) {
+		rrd_set_error( "start time: %s", parsetime_error );
+		return 1;
+	    }
+	    dprintf("- done parsing:  '%s'\n",&line[*eaten]);
+	} else if (!strcmp("end",command)) {
+	    i=scan_for_col(&line[*eaten],255,tmpstr);
+	    (*eaten)+=i;
+	    if ((parsetime_error = parsetime(tmpstr, &end_tv))) {
+		rrd_set_error( "end time: %s", parsetime_error );
+		return 1;
+	    }
+	    dprintf("- done parsing:  '%s'\n",&line[*eaten]);
+	} else {
+	    rrd_set_error("Parse error in '%s'",line);
+	    return 1;
+	}
+	if (line[*eaten]=='\0') break;
+	if (line[*eaten]!=':') {
+	    dprintf("- Expected to see end of string but got '%s'\n",\
+							 &line[*eaten]);
+	    rrd_set_error("Parse error in '%s'",line);
+	    return 1;
+	}
+	(*eaten)++;
+    }
+    if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
+	/* error string is set in parsetime.c */
+	return 1;
+    }
+    if (start_tmp < 3600*24*365*10) {
+	rrd_set_error("the first entry to fetch should be "
+			"after 1980 (%ld)",start_tmp);
+	return 1;
+    }
+
+    if (end_tmp < start_tmp) {
+	rrd_set_error("start (%ld) should be less than end (%ld)",
+			start_tmp, end_tmp);
+	return 1;
+    }
+
+    gdp->start = start_tmp;
+    gdp->end = end_tmp;
+
+    dprintf("- start time %lu\n",gdp->start);
+    dprintf("- end   time %lu\n",gdp->end);
+
+    return 0;
+}
 
+int
+rrd_parse_vdef(char *line, unsigned int *eaten, graph_desc_t *gdp, image_desc_t *im) {
+    char tmpstr[MAX_VNAME_LEN+1];	/* vname\0 */
+    int i=0;
+
+    dprintf("- parsing '%s'\n",&line[*eaten]);
+    if (rrd_parse_vname(line,eaten,gdp,im)) return 1;
+
+    sscanf(&line[*eaten], DEF_NAM_FMT ",%n", tmpstr,&i);
+    if (!i) {
+	rrd_set_error("Cannot parse line '%s'",line);
+	return 1;
+    }
+    if ((gdp->vidx=find_var(im,tmpstr))<0) {
+	rrd_set_error("Not a valid vname: %s in line %s",tmpstr,line);
+	return 1;
+    }
+    if (   im->gdes[gdp->vidx].gf != GF_DEF
+	&& im->gdes[gdp->vidx].gf != GF_CDEF) {
+	rrd_set_error("variable '%s' not DEF nor "
+			"CDEF in VDEF '%s'", tmpstr,gdp->vname);
+	return 1;
+    }
+    dprintf("- found vname: '%s' vidx %li\n",tmpstr,gdp->vidx);
+    (*eaten)+=i;
+
+    dprintf("- calling vdef_parse with param '%s'\n",&line[*eaten]);
+    vdef_parse(gdp,&line[*eaten]);
+    while (line[*eaten]!='\0'&&line[*eaten]!=':')
+	(*eaten)++;
+
+    return 0;
+}
+
+int
+rrd_parse_cdef(char *line, unsigned int *eaten, graph_desc_t *gdp, image_desc_t *im) {
+    dprintf("- parsing '%s'\n",&line[*eaten]);
+    if (rrd_parse_vname(line,eaten,gdp,im)) return 1;
+    if ((gdp->rpnp = rpn_parse(
+	(void *)im,
+	&line[*eaten],
+	&find_var_wrapper)
+    )==NULL) {
+	rrd_set_error("invalid rpn expression in: %s",&line[*eaten]);
+	return 1;
+    };
+    while (line[*eaten]!='\0'&&line[*eaten]!=':')
+	(*eaten)++;
+    return 0;
+}
+
+void
+rrd_graph_script(int argc, char *argv[], image_desc_t *im) {
+    int i;
+
+    for (i=optind+1;i<argc;i++) {
+	graph_desc_t *gdp;
+	unsigned int eaten=0;
+
+	if (gdes_alloc(im)) return; /* the error string is already set */
+	gdp = &im->gdes[im->gdes_c-1];
+#ifdef DEBUG
+	gdp->debug = 1;
+#endif
+
+	if (rrd_parse_find_gf(argv[i],&eaten,gdp)) return;
+
+	switch (gdp->gf) {
+#if 0
+	/* future command */
+	    case GF_SHIFT:	vname:value
+#endif
+	    case GF_XPORT:
+		break;
+	    case GF_PRINT:	/* vname:CF:format -or- vname:format */
+	    case GF_GPRINT:	/* vname:CF:format -or- vname:format */
+		if (rrd_parse_print(argv[i],&eaten,gdp,im)) return;
+		break;
+            case GF_COMMENT:	/* text */
+		if (rrd_parse_legend(argv[i],&eaten,gdp)) return;
+		break;
+	    case GF_PART:	/* value[#color[:legend]] */
+	    case GF_VRULE:	/* value#color[:legend] */
+	    case GF_HRULE:	/* value#color[:legend] */
+	    case GF_LINE:	/* vname-or-value[#color[:legend]][:STACK] */
+	    case GF_AREA:	/* vname-or-value[#color[:legend]][:STACK] */
+	    case GF_STACK:	/* vname-or-value[#color[:legend]] */
+	    case GF_TICK:	/* vname#color[:num[:legend]] */
+		if (rrd_parse_PVHLAST(argv[i],&eaten,gdp,im)) return;
+		break;
+	/* data acquisition */
+	    case GF_DEF:	/* vname=x:DS:CF:[:step=#][:start=#][:end=#] */
+		if (rrd_parse_def(argv[i],&eaten,gdp,im)) return;
+		break;
+	    case GF_CDEF:	/* vname=rpn-expression */
+		if (rrd_parse_cdef(argv[i],&eaten,gdp,im)) return;
+		break;
+	    case GF_VDEF:	/* vname=rpn-expression */
+		if (rrd_parse_vdef(argv[i],&eaten,gdp,im)) return;
+		break;
+	}
+	if (gdp->debug) {
+	    dprintf("used %i out of %i chars\n",eaten,strlen(argv[i]));
+	    dprintf("parsed line: '%s'\n",argv[i]);
+	    dprintf("remaining: '%s'\n",&argv[i][eaten]);
+	    if (eaten >= strlen(argv[i]))
+		dprintf("Command finished successfully\n");
+	}
+	if (eaten < strlen(argv[i])) {
+	    rrd_set_error("Garbage '%s' after command:\n%s",
+			&argv[i][eaten],argv[i]);
+	    return;
+	}
+    }
+}