annotate Meerwald/gen_dugad_sig.c @ 0:be303a3f5ea8

import
author Peter Meerwald <pmeerw@cosy.sbg.ac.at>
date Sun, 12 Aug 2007 13:14:34 +0200
parents
children f83ef905a63d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
1 #include "wm.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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2
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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3 char *progname;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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4
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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5 void usage(void) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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6 fprintf(stderr, "usage: %s [-a n] [-e n] [-f n] [-F file] [-l n] [-n n] [-o file] [-s file] [-S n] [-t n] [-T n]\n\n", progname);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
7 fprintf(stderr, "\t-a n\t\talpha factor (default 0.2)\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
8 fprintf(stderr, "\t-d n\t\tdeviation (default 1.0)\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
9 fprintf(stderr, "\t-e n\t\twavelet filtering method (default 2)\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
10 fprintf(stderr, "\t-f n\t\tfilter number (default 1)\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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11 fprintf(stderr, "\t-F file\t\tfilter definition file (default 'filter.dat')\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
12 fprintf(stderr, "\t-h\t\tprint usage\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
13 fprintf(stderr, "\t-l n\t\tdecomposition levels (default 3)\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
14 fprintf(stderr, "\t-m n \t\tmean value (default 0.0)\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
15 fprintf(stderr, "\t-n n\t\twatermark length (default 1000)\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
16 fprintf(stderr, "\t-o file\t\toutput file\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
17 fprintf(stderr, "\t-s file\t\tsignature to embed in input image\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
18 fprintf(stderr, "\t-S n\t\tseed\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
19 fprintf(stderr, "\t-t n\t\tcasting threshold (default 40.0)\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
20 fprintf(stderr, "\t-T n\t\tdetection threshold (default 50.0)\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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21 exit(0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
22 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
23
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
24 int main(int argc, char *argv[]) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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25 FILE *out = stdout;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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26 FILE *sig = NULL;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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27
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
28 char output_name[MAXPATHLEN] = "(stdout)";
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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29 char signature_name[MAXPATHLEN];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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30
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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31 int c;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
32 int i;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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33 int n = 1000;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
34 int s = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
35 int e = 2;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
36 int f = 1;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
37 int l = 3;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
38 char F[MAXPATHLEN] = "filter.dat";
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
39 double a = 0.2;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
40 double t1 = 40.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
41 double t2 = 50.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
42 double m = 0.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
43 double d = 1.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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44
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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45 progname = argv[0];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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46
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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47 while ((c = getopt(argc, argv, "a:b:d:e:f:F:h?l:m:n:o:s:S:t:T:")) != EOF) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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48 switch (c) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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49 case 'a':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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50 a = atof(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
51 if (a <= 0.0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
52 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, a);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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53 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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54 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
55 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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56 case 'd':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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57 d = atof(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
58 if (d <= 0.0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
59 fprintf(stderr, "%s: deviation %f out of range\n", progname, d);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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60 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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61 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
62 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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63
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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64 case 'e':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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65 e = atoi(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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66 if (e < 0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
67 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, e);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
68 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
69 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
70 case 'f':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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71 f = atoi(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
72 if (f <= 0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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73 fprintf(stderr, "%s: filter number %d out of range\n", progname, f);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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74 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
75 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
76 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
77 case 'F':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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78 strcpy(F, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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79 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
80 case 'h':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
81 case '?':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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82 usage();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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83 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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84 case 'l':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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85 l = atoi(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
86 if (l <= 0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
87 fprintf(stderr, "%s: decomposition level %d out of range\n", l);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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88 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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89 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
90 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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91 case 'm':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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92 m = atof(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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93 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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94 case 'n':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
95 n = atoi(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
96 if (n < 1 || n > 32000) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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97 fprintf(stderr, "%s: watermark length %d out of range\n", progname, n);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
98 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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99 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
100 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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101 case 'o':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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102 if ((out = fopen(optarg, "w")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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103 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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104 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
105 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
106 strcpy(output_name, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
107 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
108 case 's':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
109 if ((sig = fopen(optarg, "r")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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110 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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111 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
112 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
113 strcpy(signature_name, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
114 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
115 case 'S':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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116 s = atoi(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
117 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
118 case 't':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
119 t1 = atof(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
120 if (t1 <= 0.0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
121 fprintf(stderr, "%s: casting threshold %f out of range\n", progname, t1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
122 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
123 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
124 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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125 case 'T':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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126 t2 = atof(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
127 if (t2 <= 0.0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
128 fprintf(stderr, "%s: detection threshold %f out of range\n", progname, t2);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
129 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
130 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
131 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
132 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
133 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
134
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
135 argc -= optind;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
136 argv += optind;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
137
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
138 if (argc > 0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
139 usage();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
140 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
141 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
142
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
143 if (sig) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
144 char line[32];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
145 fgets(line, sizeof(line), sig);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
146 if (strspn(line, "DGSG") >= 4) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
147 if (n == 0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
148 fscanf(sig, "%d\n", &n);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
149 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
150 fscanf(sig, "%*d\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
151 if (l == 0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
152 fscanf(sig, "%d\n", &l);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
153 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
154 fscanf(sig, "%*d\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
155 if (a == 0.0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
156 fscanf(sig, "%lf\n", &a);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
157 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
158 fscanf(sig, "%*lf\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
159 if (t1 == 0.0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
160 fscanf(sig, "%lf\n", &t1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
161 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
162 fscanf(sig, "%*lf\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
163 if (t2 == 0.0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
164 fscanf(sig, "%lf\n", &t2);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
165 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
166 fscanf(sig, "%*lf\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
167 if (e < 0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
168 fscanf(sig, "%d\n", &e);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
169 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
170 fscanf(sig, "%*d\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
171 if (f == 0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
172 fscanf(sig, "%d\n", &f);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
173 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
174 fscanf(sig, "%*d\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
175 if (!strcmp(F, ""))
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
176 fscanf(sig, "%[^\n\r]\n", &F);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
177 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
178 fscanf(sig, "%*[^\n\r]\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
179 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
180 else {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
181 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
182 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
183 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
184 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
185
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
186 if (s)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
187 srandom(s);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
188 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
189 srandom(time(NULL) * getpid());
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
190
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
191 fprintf(out, "DGSG\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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192 fprintf(out, "%d\n", n);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
193 fprintf(out, "%d\n", l);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
194 fprintf(out, "%f\n", a);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
195 fprintf(out, "%f\n", t1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
196 fprintf(out, "%f\n", t2);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
197 fprintf(out, "%d\n", e);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
198 fprintf(out, "%d\n", f);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
199 fprintf(out, "%s\n", F);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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200
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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201 n >>= 1;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
202 while (n > 0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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203 double x;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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204 double x1, x2;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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205
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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206 /*
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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207 * Algorithm P (Polar method for normal deviates),
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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208 * Knuth, D., "The Art of Computer Programming", Vol. 2, 3rd Edition, p. 122
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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209 */
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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210 do {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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211 x1 = 2.0 * ((random() & RAND_MAX) / ((double) RAND_MAX + 1.0)) - 1.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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212 x2 = 2.0 * ((random() & RAND_MAX) / ((double) RAND_MAX + 1.0)) - 1.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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213 x = x1 * x1 + x2 * x2;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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214 } while (x >= 1.0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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215 x1 *= sqrt((-2.0) * log(x) / x);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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216 x2 *= sqrt((-2.0) * log(x) / x);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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217
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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218 fprintf(out, "%f\n", m + d * x1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
219 fprintf(out, "%f\n", m + d * x2);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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220
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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221 n--;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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222 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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223
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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224 fclose(out);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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225
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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226 exit(0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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227 }

Repositories maintained by Peter Meerwald, pmeerw@pmeerw.net.