implemented f$file_put_contents and f$getimagesize

Author: Nikita Siniachenko

builtin-functions/kphp-light/stdlib/file-functions.txt

@@ -30,6 +30,7 @@ function fflush ($stream ::: mixed): bool;
 function fclose ($stream ::: mixed): bool;
 
 function file_get_contents ($name ::: string) ::: string | false;
+function file_put_contents ($name ::: string, $content ::: mixed, $flags ::: int = 0) ::: int | false;
 
 function printf ($format ::: string, ...$args) ::: int;
 
@@ -48,8 +49,6 @@ function dirname ($name ::: string) ::: string;
 /** @kphp-extern-func-info stub generation-required */
 function file ($name ::: string) ::: string[] | false;
 /** @kphp-extern-func-info stub generation-required */
-function file_put_contents ($name ::: string, $content ::: mixed, $flags ::: int = 0) ::: int | false;
-/** @kphp-extern-func-info stub generation-required */
 function file_exists ($name ::: string) ::: bool;
 /** @kphp-extern-func-info stub generation-required */
 function filectime ($name ::: string) ::: int | false;

runtime-light/k2-platform/k2-api.h

@@ -196,6 +196,10 @@ inline size_t read(k2::descriptor descriptor, size_t buf_len, void* buf) noexcep
   return k2_read(descriptor, buf_len, buf);
 }
 
+inline size_t pread(k2::descriptor descriptor, size_t buf_len, void* buf, off_t offset) noexcept {
+  return k2_pread(descriptor, buf_len, buf, offset);
+}
+
 inline void please_shutdown(k2::descriptor descriptor) noexcept {
   k2_please_shutdown(descriptor);
 }

runtime-light/k2-platform/k2-header.h

@@ -329,6 +329,13 @@ size_t k2_write(uint64_t stream_d, size_t data_len, const void* data);
  */
 size_t k2_read(uint64_t stream_d, size_t buf_len, void* buf);
 
+/**
+ * reads at most `buf_len` bytes to `buf` from `offset` position without modifying stream state.
+ *
+ * @return number of read bytes.
+ */
+size_t k2_pread(uint64_t stream_d, size_t buf_len, void* buf, off_t offset);
+
 /**
  * Sets `StreamStatus.please_whutdown_write=true` for the component on the
  * opposite side (does not affect `StreamStatus` on your side).