src/px/ra_rgbe.c

#ifndef lint
static const char       RCSid[] = "$Id: ra_rgbe.c,v 2.19 2016/08/18 00:52:48 greg Exp $";
#endif
/*
 *  program to convert from RADIANCE RLE to flat format
 */

#include  <stdio.h>
#include  <math.h>
#include  <time.h>
#include  <string.h>

#include  "platform.h"
#include  "rtio.h"
#include  "paths.h"
#include  "color.h"
#include  "resolu.h"

#define dumpheader(fp)  putbinary(headlines, 1, headlen, fp)

int  bradj = 0;                         /* brightness adjustment */
int  doflat = 1;                        /* produce flat file */
int  force = 0;                         /* force file overwrite? */
int  findframe = 0;                     /* find a specific frame? */
int  frameno = 0;                       /* current frame number */
int  fmterr = 0;                        /* got input format error */
char  *headlines;                       /* current header info. */
int  headlen;                           /* current header length */

char  *progname;

static gethfunc addhline;
static int transfer(char *ospec);
static int loadheader(FILE *fp);


int
main(int  argc, char  *argv[])
{
        char    *ospec;
        int  i;

        progname = argv[0];

        for (i = 1; i < argc; i++)
                if (argv[i][0] == '-')
                        switch (argv[i][1]) {
                        case 'r':
                                doflat = !doflat;
                                break;
                        case 'e':
                                if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
                                        goto userr;
                                bradj = atoi(argv[++i]);
                                break;
                        case 'n':
                                findframe = atoi(argv[++i]);
                                break;
                        case 'f':
                                force++;
                                break;
                        case '\0':
                                goto gotfile;
                        default:
                                goto userr;
                        }
                else
                        break;
gotfile:
        if (i < argc-2)
                goto userr;
        if (i <= argc-1 && strcmp(argv[i], "-") &&
                        freopen(argv[i], "r", stdin) == NULL) {
                fprintf(stderr, "%s: can't open input \"%s\"\n",
                                progname, argv[i]);
                exit(1);
        }
        SET_FILE_BINARY(stdin);
        ospec = i==argc-2 ? argv[i+1] : (char *)NULL;
        while (transfer(ospec))
                ;
        exit(0);
userr:
        fprintf(stderr,
        "Usage: %s [-r][-e +/-stops][-f][-n frame] [input [outspec]]\n",
                        progname);
        exit(1);
}


static int
transfer(                       /* transfer a Radiance picture */
        char    *ospec
)
{
        char    oname[PATH_MAX];
        FILE    *fp;
        int     order;
        int     xmax, ymax;
        COLR    *scanin;
        int     y;
                                        /* get header info. */
        if (!(y = loadheader(stdin)))
                return(0);
        if (y < 0 || (order = fgetresolu(&xmax, &ymax, stdin)) < 0) {
                fprintf(stderr, "%s: bad input format\n", progname);
                exit(1);
        }
                                        /* did we pass the target frame? */
        if (findframe && findframe < frameno)
                return(0);
                                        /* allocate scanline */
        scanin = (COLR *)tempbuffer(xmax*sizeof(COLR));
        if (scanin == NULL) {
                perror(progname);
                exit(1);
        }
                                        /* skip frame? */
        if (findframe > frameno) {
                for (y = ymax; y--; )
                        if (freadcolrs(scanin, xmax, stdin) < 0) {
                                fprintf(stderr,
                                        "%s: error reading input picture\n",
                                                progname);
                                exit(1);
                        }
                return(1);
        }
                                        /* open output file/command */
        if (ospec == NULL) {
                strcpy(oname, "<stdout>");
                fp = stdout;
        } else {
                sprintf(oname, ospec, frameno);
                if (oname[0] == '!') {
                        if ((fp = popen(oname+1, "w")) == NULL) {
                                fprintf(stderr, "%s: cannot start \"%s\"\n",
                                                progname, oname);
                                exit(1);
                        }
                } else {
                        if (!force && access(oname, 0) >= 0) {
                                fprintf(stderr,
                                        "%s: output file \"%s\" exists\n",
                                                progname, oname);
                                exit(1);
                        }
                        if ((fp = fopen(oname, "w")) == NULL) {
                                fprintf(stderr, "%s: ", progname);
                                perror(oname);
                                exit(1);
                        }
                }
        }
        SET_FILE_BINARY(fp);
        dumpheader(fp);                 /* put out header */
        fputs(progname, fp);
        if (bradj)
                fprintf(fp, " -e %+d", bradj);
        if (!doflat)
                fputs(" -r", fp);
        fputc('\n', fp);
        if (bradj)
                fputexpos(pow(2.0, (double)bradj), fp);
        fputc('\n', fp);
        fputresolu(order, xmax, ymax, fp);
                                        /* transfer picture */
        for (y = ymax; y--; ) {
                if (freadcolrs(scanin, xmax, stdin) < 0) {
                        fprintf(stderr, "%s: error reading input picture\n",
                                        progname);
                        exit(1);
                }
                if (bradj)
                        shiftcolrs(scanin, xmax, bradj);
                if (doflat)
                        putbinary((char *)scanin, sizeof(COLR), xmax, fp);
                else
                        fwritecolrs(scanin, xmax, fp);
                if (ferror(fp)) {
                        fprintf(stderr, "%s: error writing output to \"%s\"\n",
                                        progname, oname);
                        exit(1);
                }
        }
                                        /* clean up */
        if (oname[0] == '!')
                pclose(fp);
        else if (ospec != NULL)
                fclose(fp);
        return(1);
}


static int
addhline(                       /* add a line to our info. header */
        char    *s,
        void    *p
)
{
        char    fmt[MAXFMTLEN];
        int     n;

        if (formatval(fmt, s))
                fmterr += !globmatch(PICFMT, fmt);
        else if (!strncmp(s, "FRAME=", 6))
                frameno = atoi(s+6);
        n = strlen(s);
        if (headlen)
                headlines = (char *)realloc((void *)headlines, headlen+n+1);
        else
                headlines = (char *)malloc(n+1);
        if (headlines == NULL) {
                perror(progname);
                exit(1);
        }
        strcpy(headlines+headlen, s);
        headlen += n;
        return(0);
}


static int
loadheader(                     /* load an info. header into memory */
        FILE    *fp
)
{
        fmterr = 0; frameno = 0;
        if (headlen) {                  /* free old header */
                free(headlines);
                headlen = 0;
        }
        if (getheader(fp, addhline, NULL) < 0)
                return(0);
        if (fmterr)
                return(-1);
        return(1);
}
Revision:	2.20
Committed:	Thu Aug 2 18:33:47 2018 UTC (5 years, 9 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad5R2
Changes since 2.19:	+2 -2 lines
Log Message:	Created MAXFMTLEN to guard against buffer overrun attacks in header input
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.20	static const char RCSid[] = "$Id: ra_rgbe.c,v 2.19 2016/08/18 00:52:48 greg Exp $";
3	greg	1.1	#endif
4			/*
5			* program to convert from RADIANCE RLE to flat format
6			*/
7
8			#include <stdio.h>
9	greg	2.4	#include <math.h>
10	greg	2.10	#include <time.h>
11	schorsch	2.13	#include <string.h>
12	schorsch	2.12
13			#include "platform.h"
14	greg	2.19	#include "rtio.h"
15	greg	2.18	#include "paths.h"
16	greg	2.4	#include "color.h"
17			#include "resolu.h"
18
19	greg	2.19	#define dumpheader(fp) putbinary(headlines, 1, headlen, fp)
20	gregl	2.8
21	greg	1.1	int bradj = 0; /* brightness adjustment */
22			int doflat = 1; /* produce flat file */
23	gregl	2.8	int force = 0; /* force file overwrite? */
24			int findframe = 0; /* find a specific frame? */
25			int frameno = 0; /* current frame number */
26			int fmterr = 0; /* got input format error */
27			char headlines; / current header info. */
28			int headlen; /* current header length */
29
30	greg	1.1	char *progname;
31
32	schorsch	2.16	static gethfunc addhline;
33	schorsch	2.17	static int transfer(char *ospec);
34			static int loadheader(FILE *fp);
35	schorsch	2.16
36	greg	1.1
37	schorsch	2.17	int
38			main(int argc, char *argv[])
39	greg	1.1	{
40	gregl	2.8	char *ospec;
41	greg	1.1	int i;
42	gregl	2.7
43	greg	1.1	progname = argv[0];
44
45			for (i = 1; i < argc; i++)
46			if (argv[i][0] == '-')
47			switch (argv[i][1]) {
48			case 'r':
49			doflat = !doflat;
50			break;
51			case 'e':
52			if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
53			goto userr;
54			bradj = atoi(argv[++i]);
55			break;
56	gregl	2.8	case 'n':
57			findframe = atoi(argv[++i]);
58			break;
59			case 'f':
60			force++;
61			break;
62			case '\0':
63			goto gotfile;
64	greg	1.1	default:
65			goto userr;
66			}
67			else
68			break;
69	gregl	2.8	gotfile:
70	greg	1.1	if (i < argc-2)
71			goto userr;
72	gregl	2.8	if (i <= argc-1 && strcmp(argv[i], "-") &&
73			freopen(argv[i], "r", stdin) == NULL) {
74	greg	1.1	fprintf(stderr, "%s: can't open input \"%s\"\n",
75			progname, argv[i]);
76			exit(1);
77			}
78	schorsch	2.12	SET_FILE_BINARY(stdin);
79	gregl	2.8	ospec = i==argc-2 ? argv[i+1] : (char *)NULL;
80			while (transfer(ospec))
81			;
82	greg	1.1	exit(0);
83			userr:
84	gregl	2.8	fprintf(stderr,
85			"Usage: %s [-r][-e +/-stops][-f][-n frame] [input [outspec]]\n",
86	greg	1.1	progname);
87			exit(1);
88			}
89
90
91	schorsch	2.17	static int
92			transfer( /* transfer a Radiance picture */
93			char *ospec
94			)
95	greg	1.1	{
96	schorsch	2.15	char oname[PATH_MAX];
97	gregl	2.8	FILE *fp;
98	greg	1.2	int order;
99	greg	2.3	int xmax, ymax;
100	greg	1.1	COLR *scanin;
101			int y;
102	gregl	2.8	/* get header info. */
103			if (!(y = loadheader(stdin)))
104			return(0);
105			if (y < 0 \|\| (order = fgetresolu(&xmax, &ymax, stdin)) < 0) {
106			fprintf(stderr, "%s: bad input format\n", progname);
107			exit(1);
108			}
109			/* did we pass the target frame? */
110			if (findframe && findframe < frameno)
111			return(0);
112			/* allocate scanline */
113			scanin = (COLR )tempbuffer(xmaxsizeof(COLR));
114			if (scanin == NULL) {
115			perror(progname);
116			exit(1);
117			}
118			/* skip frame? */
119			if (findframe > frameno) {
120			for (y = ymax; y--; )
121			if (freadcolrs(scanin, xmax, stdin) < 0) {
122			fprintf(stderr,
123			"%s: error reading input picture\n",
124			progname);
125			exit(1);
126			}
127			return(1);
128			}
129			/* open output file/command */
130			if (ospec == NULL) {
131			strcpy(oname, "<stdout>");
132			fp = stdout;
133			} else {
134			sprintf(oname, ospec, frameno);
135			if (oname[0] == '!') {
136			if ((fp = popen(oname+1, "w")) == NULL) {
137			fprintf(stderr, "%s: cannot start \"%s\"\n",
138			progname, oname);
139			exit(1);
140			}
141			} else {
142			if (!force && access(oname, 0) >= 0) {
143			fprintf(stderr,
144			"%s: output file \"%s\" exists\n",
145			progname, oname);
146			exit(1);
147			}
148			if ((fp = fopen(oname, "w")) == NULL) {
149			fprintf(stderr, "%s: ", progname);
150			perror(oname);
151			exit(1);
152			}
153			}
154			}
155	schorsch	2.12	SET_FILE_BINARY(fp);
156	gregl	2.8	dumpheader(fp); /* put out header */
157			fputs(progname, fp);
158	greg	1.1	if (bradj)
159	gregl	2.8	fprintf(fp, " -e %+d", bradj);
160	gregl	2.7	if (!doflat)
161	gregl	2.8	fputs(" -r", fp);
162			fputc('\n', fp);
163	greg	2.2	if (bradj)
164	gregl	2.8	fputexpos(pow(2.0, (double)bradj), fp);
165			fputc('\n', fp);
166			fputresolu(order, xmax, ymax, fp);
167			/* transfer picture */
168	gregl	2.7	for (y = ymax; y--; ) {
169	gregl	2.8	if (freadcolrs(scanin, xmax, stdin) < 0) {
170			fprintf(stderr, "%s: error reading input picture\n",
171			progname);
172			exit(1);
173			}
174	greg	1.1	if (bradj)
175			shiftcolrs(scanin, xmax, bradj);
176			if (doflat)
177	greg	2.19	putbinary((char *)scanin, sizeof(COLR), xmax, fp);
178	greg	1.1	else
179	gregl	2.8	fwritecolrs(scanin, xmax, fp);
180			if (ferror(fp)) {
181			fprintf(stderr, "%s: error writing output to \"%s\"\n",
182			progname, oname);
183			exit(1);
184			}
185	greg	1.1	}
186	gregl	2.8	/* clean up */
187			if (oname[0] == '!')
188			pclose(fp);
189			else if (ospec != NULL)
190			fclose(fp);
191			return(1);
192			}
193
194
195	schorsch	2.16	static int
196			addhline( /* add a line to our info. header */
197			char *s,
198			void *p
199			)
200	gregl	2.8	{
201	greg	2.20	char fmt[MAXFMTLEN];
202	gregl	2.8	int n;
203
204			if (formatval(fmt, s))
205			fmterr += !globmatch(PICFMT, fmt);
206			else if (!strncmp(s, "FRAME=", 6))
207			frameno = atoi(s+6);
208			n = strlen(s);
209			if (headlen)
210	greg	2.11	headlines = (char )realloc((void )headlines, headlen+n+1);
211	gregl	2.8	else
212			headlines = (char *)malloc(n+1);
213			if (headlines == NULL) {
214			perror(progname);
215			exit(1);
216			}
217			strcpy(headlines+headlen, s);
218			headlen += n;
219	gwlarson	2.9	return(0);
220	gregl	2.8	}
221
222
223	schorsch	2.17	static int
224			loadheader( /* load an info. header into memory */
225			FILE *fp
226			)
227	gregl	2.8	{
228			fmterr = 0; frameno = 0;
229			if (headlen) { /* free old header */
230			free(headlines);
231			headlen = 0;
232			}
233			if (getheader(fp, addhline, NULL) < 0)
234			return(0);
235			if (fmterr)
236			return(-1);
237			return(1);
238	greg	1.1	}