portaudio: allow also case insensitive substr

Author: MartinPulec

src/audio/portaudio_common.c

@@ -42,6 +42,7 @@
 #include <stdlib.h>           // for calloc
 #include <string.h>           // for strncpy, strstr
 
+#include "compat/strings.h"   // for ug_strcasecmp
 #include "debug.h"
 #include "host.h"             // for uv_argv
 #include "portaudio_common.h"
@@ -259,6 +260,7 @@ portaudio_select_device_by_name(const char                     *name,
 {
         int prefix_idx = -1; // dev idx starting with name
         int substr_idx = -1; // dev idx with name as substr
+        int substr_icase_idx = -1; // dev idx with name as substr (ignore case)
         for (int i = 0; i < Pa_GetDeviceCount(); i++) {
                 const PaDeviceInfo *device_info = Pa_GetDeviceInfo(i);
                 if (!has_channels(device_info, dir)) {
@@ -274,13 +276,20 @@ portaudio_select_device_by_name(const char                     *name,
                                 prefix_idx = i;
                         }
                 }
+                if (ug_strcasestr(device_info->name, name) ==
+                    device_info->name) {
+                        substr_icase_idx = i;
+                }
         }
         if (prefix_idx != -1) {
                 return prefix_idx;
         }
         if (substr_idx != -1) {
                 return substr_idx;
         }
+        if (substr_icase_idx != -1) {
+                return substr_icase_idx;
+        }
         log_msg(LOG_LEVEL_ERROR, MOD_NAME "No device named \"%s\" was found!\n", name);
         return -2;
 }

src/compat/strings.h

@@ -5,7 +5,7 @@
  * compatibility header for strcasecmp. strdup, strerror_s
  */
 /*
- * Copyright (c) 2024 CESNET
+ * Copyright (c) 2024-2025 CESNET
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -77,6 +77,9 @@ COMPAT_MISC_EXT_C int __xpg_strerror_r(int errcode, char *buffer, size_t length)
 #define strdupa(s) (char *) memcpy(alloca(strlen(s) + 1), s, strlen(s) + 1)
 #endif // defined strdupa
 
+COMPAT_MISC_EXT_C const char *ug_strcasestr(const char *haystack,
+                                            const char *needle);
+
 #undef COMPAT_MISC_EXT_C
 
 #endif // ! defined COMPAT_STRINGS_H_D54CAFC8_A1A0_4FF5_80A0_91F34FB11E12

src/utils/string.c

@@ -3,7 +3,7 @@
  * @author Martin Pulec     <[email protected]>
  */
 /*
- * Copyright (c) 2014-2024 CESNET, z. s. p. o.
+ * Copyright (c) 2014-2025 CESNET
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -47,6 +47,7 @@
 #include <unistd.h>
 #endif
 
+#include "compat/strings.h"
 #include "debug.h"
 #include "utils/string.h"
 
@@ -223,3 +224,25 @@ pretty_print_fourcc(const void *fcc)
         *out_ptr = '\0';
         return out;
 }
+
+const char *
+ug_strcasestr(const char *haystick, const char *needle)
+{
+        while (strlen(haystick) >= strlen(needle)) {
+                const char *cur_haystick = haystick;
+                const char *cur_needle   = needle;
+                while (*cur_needle != '\0') {
+                        if (tolower(*cur_haystick) != tolower(*cur_needle)) {
+                                break;
+                        }
+                        cur_haystick += 1;
+                        cur_needle += 1;
+                }
+                if (*cur_needle == '\0') {
+                        return haystick;
+                }
+
+                haystick += 1;
+        }
+        return NULL;
+}