4916b3ca0cb0b507038a22dc3bfb7613c301339a
1 #include <stdlib.h>
2 #include <stdio.h>
3 #include <stdint.h>
4 #include <inttypes.h>
5 #include <string.h>
6 #include <ctype.h>
7 #include <errno.h>
8 #include <sys/types.h>
9 #include <sys/stat.h>
10 #include <unistd.h>
11 #include <dirent.h>
12 #include <assert.h>
13 #include <math.h>
15 #include <rrd.h>
17 #include "common.h"
18 #include "graph_list.h"
20 #include <fcgiapp.h>
21 #include <fcgi_stdio.h>
23 size_t c_strlcat (char *dst, const char *src, size_t size) /* {{{ */
24 {
25 size_t retval;
26 size_t dst_len;
27 size_t src_len;
29 dst_len = strlen (dst);
30 src_len = strlen (src);
31 retval = dst_len + src_len;
33 if ((dst_len + 1) >= size)
34 return (retval);
36 dst += dst_len;
37 size -= dst_len;
38 assert (size >= 2);
40 /* Result will be truncated. */
41 if (src_len >= size)
42 src_len = size - 1;
44 memcpy (dst, src, src_len);
45 dst[src_len] = 0;
47 return (retval);
48 } /* }}} size_t c_strlcat */
50 int ds_list_from_rrd_file (char *file, /* {{{ */
51 size_t *ret_dses_num, char ***ret_dses)
52 {
53 char *rrd_argv[] = { "info", file, NULL };
54 int rrd_argc = (sizeof (rrd_argv) / sizeof (rrd_argv[0])) - 1;
56 rrd_info_t *info;
57 rrd_info_t *ptr;
59 char **dses = NULL;
60 size_t dses_num = 0;
62 info = rrd_info (rrd_argc, rrd_argv);
63 if (info == NULL)
64 {
65 printf ("%s: rrd_info (%s) failed.\n", __func__, file);
66 return (-1);
67 }
69 for (ptr = info; ptr != NULL; ptr = ptr->next)
70 {
71 size_t keylen;
72 size_t dslen;
73 char *ds;
74 char **tmp;
76 if (strncmp ("ds[", ptr->key, strlen ("ds[")) != 0)
77 continue;
79 keylen = strlen (ptr->key);
80 if (keylen < strlen ("ds[?].index"))
81 continue;
83 dslen = keylen - strlen ("ds[].index");
84 assert (dslen >= 1);
86 if (strcmp ("].index", ptr->key + (strlen ("ds[") + dslen)) != 0)
87 continue;
89 ds = malloc (dslen + 1);
90 if (ds == NULL)
91 continue;
93 memcpy (ds, ptr->key + strlen ("ds["), dslen);
94 ds[dslen] = 0;
96 tmp = realloc (dses, sizeof (*dses) * (dses_num + 1));
97 if (tmp == NULL)
98 {
99 free (ds);
100 continue;
101 }
102 dses = tmp;
104 dses[dses_num] = ds;
105 dses_num++;
106 }
108 rrd_info_free (info);
110 if (dses_num < 1)
111 {
112 assert (dses == NULL);
113 return (ENOENT);
114 }
116 *ret_dses_num = dses_num;
117 *ret_dses = dses;
119 return (0);
120 } /* }}} int ds_list_from_rrd_file */
122 static int hsv_to_rgb (double *hsv, double *rgb) /* {{{ */
123 {
124 double c = hsv[2] * hsv[1];
125 double h = hsv[0] / 60.0;
126 double x = c * (1.0 - fabs (fmod (h, 2.0) - 1));
127 double m = hsv[2] - c;
129 rgb[0] = 0.0;
130 rgb[1] = 0.0;
131 rgb[2] = 0.0;
133 if ((0.0 <= h) && (h < 1.0)) { rgb[0] = 1.0; rgb[1] = x; rgb[2] = 0.0; }
134 else if ((1.0 <= h) && (h < 2.0)) { rgb[0] = x; rgb[1] = 1.0; rgb[2] = 0.0; }
135 else if ((2.0 <= h) && (h < 3.0)) { rgb[0] = 0.0; rgb[1] = 1.0; rgb[2] = x; }
136 else if ((3.0 <= h) && (h < 4.0)) { rgb[0] = 0.0; rgb[1] = x; rgb[2] = 1.0; }
137 else if ((4.0 <= h) && (h < 5.0)) { rgb[0] = x; rgb[1] = 0.0; rgb[2] = 1.0; }
138 else if ((5.0 <= h) && (h < 6.0)) { rgb[0] = 1.0; rgb[1] = 0.0; rgb[2] = x; }
140 rgb[0] += m;
141 rgb[1] += m;
142 rgb[2] += m;
144 return (0);
145 } /* }}} int hsv_to_rgb */
147 static uint32_t rgb_to_uint32 (double *rgb) /* {{{ */
148 {
149 uint8_t r;
150 uint8_t g;
151 uint8_t b;
153 r = (uint8_t) (255.0 * rgb[0]);
154 g = (uint8_t) (255.0 * rgb[1]);
155 b = (uint8_t) (255.0 * rgb[2]);
157 return ((((uint32_t) r) << 16)
158 | (((uint32_t) g) << 8)
159 | ((uint32_t) b));
160 } /* }}} uint32_t rgb_to_uint32 */
162 uint32_t get_random_color (void) /* {{{ */
163 {
164 double hsv[3] = { 0.0, 1.0, 1.0 };
165 double rgb[3] = { 0.0, 0.0, 0.0 };
167 hsv[0] = 360.0 * ((double) rand ()) / (((double) RAND_MAX) + 1.0);
169 hsv_to_rgb (hsv, rgb);
171 return (rgb_to_uint32 (rgb));
172 } /* }}} uint32_t get_random_color */
174 int print_debug (const char *format, ...) /* {{{ */
175 {
176 static _Bool have_header = 0;
178 va_list ap;
179 int status;
181 if (!have_header)
182 {
183 printf ("Content-Type: text/plain\n\n");
184 have_header = 1;
185 }
187 va_start (ap, format);
188 status = vprintf (format, ap);
189 va_end (ap);
191 return (status);
192 } /* }}} int print_debug */
194 char *strtolower (char *str) /* {{{ */
195 {
196 unsigned int i;
198 if (str == NULL)
199 return (NULL);
201 for (i = 0; str[i] != 0; i++)
202 str[i] = (char) tolower ((int) str[i]);
204 return (str);
205 } /* }}} char *strtolower */
207 char *strtolower_copy (const char *str)
208 {
209 if (str == NULL)
210 return (NULL);
212 return (strdup (str));
213 }
215 /* vim: set sw=2 sts=2 et fdm=marker : */