[FL-3927] FuriThread stdin (#3979)

* feat: FuriThread stdin
* ci: fix f18
* feat: stdio callback context

Co-authored-by: Georgii Surkov <37121527+gsurkov@users.noreply.github.com>
Co-authored-by: あく <alleteam@gmail.com>

lib/print/SConscript

@@ -44,18 +44,24 @@ wrapped_fn_list = [
     "vsiprintf",
     "vsniprintf",
     #
-    # Scanf is not implemented 4 now
+    # standard input
+    #
+    "fgetc",
+    "getc",
+    "getchar",
+    "fgets",
+    "ungetc",
+    #
+    # standard input, but unimplemented
+    #
+    "gets",
+    #
+    # scanf, not implemented for now
     #
     # "fscanf",
     # "scanf",
     # "sscanf",
     # "vsprintf",
-    # "fgetc",
-    # "fgets",
-    # "getc",
-    # "getchar",
-    # "gets",
-    # "ungetc",
     # "vfscanf",
     # "vscanf",
     # "vsscanf",

lib/print/wrappers.c

@@ -51,11 +51,54 @@ int __wrap_snprintf(char* str, size_t size, const char* format, ...) {
 }
 
 int __wrap_fflush(FILE* stream) {
-    UNUSED(stream);
-    furi_thread_stdout_flush();
+    if(stream == stdout) furi_thread_stdout_flush();
     return 0;
 }
 
+int __wrap_fgetc(FILE* stream) {
+    if(stream != stdin) return EOF;
+    char c;
+    if(furi_thread_stdin_read(&c, 1, FuriWaitForever) == 0) return EOF;
+    return c;
+}
+
+int __wrap_getc(FILE* stream) {
+    return __wrap_fgetc(stream);
+}
+
+int __wrap_getchar(void) {
+    return __wrap_fgetc(stdin);
+}
+
+char* __wrap_fgets(char* str, size_t n, FILE* stream) {
+    // leave space for the zero terminator
+    furi_check(n >= 1);
+    n--;
+
+    if(stream != stdin) {
+        *str = '\0';
+        return str;
+    }
+
+    // read characters
+    int c;
+    do {
+        c = __wrap_fgetc(stdin);
+        if(c > 0) *(str++) = c;
+    } while(c != EOF && c != '\n' && --n);
+
+    // place zero terminator
+    *str = '\0';
+    return str;
+}
+
+int __wrap_ungetc(int ch, FILE* stream) {
+    char c = ch;
+    if(stream != stdin) return EOF;
+    furi_thread_stdin_unread(&c, 1);
+    return ch;
+}
+
 __attribute__((__noreturn__)) void __wrap___assert(const char* file, int line, const char* e) {
     UNUSED(file);
     UNUSED(line);

lib/print/wrappers.h

@@ -16,6 +16,12 @@ int __wrap_putc(int ch, FILE* stream);
 int __wrap_snprintf(char* str, size_t size, const char* format, ...);
 int __wrap_fflush(FILE* stream);
 
+int __wrap_fgetc(FILE* stream);
+int __wrap_getc(FILE* stream);
+int __wrap_getchar(void);
+char* __wrap_fgets(char* str, size_t n, FILE* stream);
+int __wrap_ungetc(int ch, FILE* stream);
+
 __attribute__((__noreturn__)) void __wrap___assert(const char* file, int line, const char* e);
 
 __attribute__((__noreturn__)) void