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      1 /*
      2  * v4l-test: Test environment for Video For Linux Two API
      3  *
      4  * 30 Jan 2009  0.1  First release
      5  *
      6  * Written by Mrton Nmeth <nm127 (at) freemail.hu>
      7  * Released under GPL
      8  */
      9 
     10 #include <stdio.h>
     11 #include <sys/types.h>
     12 #include <sys/stat.h>
     13 #include <fcntl.h>
     14 #include <unistd.h>
     15 #include <sys/ioctl.h>
     16 #include <errno.h>
     17 #include <string.h>
     18 
     19 #include <linux/videodev2.h>
     20 #include <linux/errno.h>
     21 
     22 #include "v4l2_test.h"
     23 #include "dev_video.h"
     24 #include "video_limits.h"
     25 #include "v4l2_validator.h"
     26 
     27 int valid_v4l2_std_id(v4l2_std_id std_id)
     28 {
     29 	int valid = 0;
     30 
     31 	if ((std_id & ~(V4L2_STD_PAL_B |
     32 			V4L2_STD_PAL_B1 |
     33 			V4L2_STD_PAL_G |
     34 			V4L2_STD_PAL_H |
     35 			V4L2_STD_PAL_I |
     36 			V4L2_STD_PAL_D |
     37 			V4L2_STD_PAL_D1 |
     38 			V4L2_STD_PAL_K |
     39 			V4L2_STD_PAL_M |
     40 			V4L2_STD_PAL_N |
     41 			V4L2_STD_PAL_Nc |
     42 			V4L2_STD_PAL_60 |
     43 			V4L2_STD_NTSC_M |
     44 			V4L2_STD_NTSC_M_JP |
     45 			V4L2_STD_NTSC_443 |
     46 			V4L2_STD_NTSC_M_KR |
     47 			V4L2_STD_SECAM_B |
     48 			V4L2_STD_SECAM_D |
     49 			V4L2_STD_SECAM_G |
     50 			V4L2_STD_SECAM_H |
     51 			V4L2_STD_SECAM_K |
     52 			V4L2_STD_SECAM_K1 |
     53 			V4L2_STD_SECAM_L |
     54 			V4L2_STD_SECAM_LC |
     55 			V4L2_STD_ATSC_8_VSB | V4L2_STD_ATSC_16_VSB))
     56 	    == 0) {
     57 		valid = 1;
     58 	} else {
     59 		valid = 0;
     60 	}
     61 	return valid;
     62 }
     63 
     64 int valid_tuner_capability(__u32 capability)
     65 {
     66 	int valid = 0;
     67 
     68 	if ((capability & ~(V4L2_TUNER_CAP_LOW |
     69 			    V4L2_TUNER_CAP_NORM |
     70 			    V4L2_TUNER_CAP_STEREO |
     71 			    V4L2_TUNER_CAP_LANG1 |
     72 			    V4L2_TUNER_CAP_LANG2 | V4L2_TUNER_CAP_SAP))
     73 	    == 0) {
     74 		valid = 1;
     75 	} else {
     76 		valid = 0;
     77 	}
     78 	return valid;
     79 }
     80 
     81 int valid_modulator_capability(__u32 capability)
     82 {
     83 	return valid_tuner_capability(capability);
     84 }
     85 
     86 int valid_string(char *str, unsigned int max_length)
     87 {
     88 	int valid = 1;
     89 	unsigned int i;
     90 
     91 	i = 0;
     92 	while (i < max_length && str[i] != 0) {
     93 		/* Printable characters start with SPACE (32) and
     94 		 * ends with '~' (126) inclusively.
     95 		 */
     96 		if (str[i] < 32 || 126 < str[i]) {
     97 			valid = 0;
     98 			break;
     99 		}
    100 		i++;
    101 	}
    102 
    103 	/* check if the string was closed with zero byte properly */
    104 	if (i == max_length) {
    105 		valid = 0;
    106 	}
    107 
    108 	return valid;
    109 }
    110