[libc][bazel] Add (v)asprintf targets and tests (#159476)

Author: michaelrj-google

libc/src/stdio/printf_core/vasprintf_internal.h

@@ -10,7 +10,6 @@
 #include "hdr/func/malloc.h"
 #include "hdr/func/realloc.h"
 #include "src/__support/arg_list.h"
-#include "src/stdio/printf.h"
 #include "src/stdio/printf_core/core_structs.h"
 #include "src/stdio/printf_core/printf_main.h"
 #include "src/stdio/printf_core/writer.h"

libc/test/src/stdio/CMakeLists.txt

@@ -270,7 +270,6 @@ add_libc_test(
      libc.src.stdio.vasprintf
      libc.src.string.memset
      libc.include.stdlib
-     libc.src.stdio.sprintf
  )
 
 if(LLVM_LIBC_FULL_BUILD)

libc/test/src/stdio/asprintf_test.cpp

@@ -76,6 +76,7 @@ TEST(LlvmLibcASPrintfTest, LargeStringNoConv) {
 TEST(LlvmLibcASPrintfTest, ManyReAlloc) {
   char *buff = nullptr;
   char long_str[1001];
+  // TODO: simplify test to match with vasprintf_test
   auto expected_num_chars =
       LIBC_NAMESPACE::sprintf(long_str, "%200s%200s%200s", "a", "b", "c");
   long_str[expected_num_chars] = '\0';

libc/test/src/stdio/vasprintf_test.cpp

@@ -6,7 +6,6 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "src/stdio/sprintf.h"
 #include "src/stdio/vasprintf.h"
 #include "src/string/memset.h"
 #include "test/UnitTest/Test.h"

utils/bazel/llvm-project-overlay/libc/BUILD.bazel

@@ -6328,6 +6328,31 @@ libc_support_library(
     ],
 )
 
+libc_support_library(
+    name = "vasprintf_internal",
+    hdrs = ["src/stdio/printf_core/vasprintf_internal.h"],
+    deps = [
+        ":__support_arg_list",
+        ":__support_macros_attributes",
+        ":func_free",
+        ":func_malloc",
+        ":func_realloc",
+        ":printf_main",
+        ":printf_writer",
+        ":types_FILE",
+    ],
+)
+
+libc_function(
+    name = "asprintf",
+    srcs = ["src/stdio/asprintf.cpp"],
+    hdrs = ["src/stdio/asprintf.h"],
+    deps = [
+        ":__support_arg_list",
+        ":vasprintf_internal",
+    ],
+)
+
 libc_function(
     name = "sprintf",
     srcs = ["src/stdio/sprintf.cpp"],
@@ -6379,6 +6404,16 @@ libc_function(
     ],
 )
 
+libc_function(
+    name = "vasprintf",
+    srcs = ["src/stdio/vasprintf.cpp"],
+    hdrs = ["src/stdio/vasprintf.h"],
+    deps = [
+        ":__support_arg_list",
+        ":vasprintf_internal",
+    ],
+)
+
 libc_function(
     name = "vsprintf",
     srcs = ["src/stdio/vsprintf.cpp"],

utils/bazel/llvm-project-overlay/libc/test/src/stdio/BUILD.bazel

@@ -47,6 +47,16 @@ libc_test(
     ],
 )
 
+libc_test(
+    name = "asprintf_test",
+    srcs = ["asprintf_test.cpp"],
+    deps = [
+        "//libc:asprintf",
+        "//libc:memset",
+        "//libc:sprintf",
+    ],
+)
+
 libc_test(
     name = "sprintf_test",
     srcs = ["sprintf_test.cpp"],
@@ -81,6 +91,15 @@ libc_test(
     ],
 )
 
+libc_test(
+    name = "vasprintf_test",
+    srcs = ["vasprintf_test.cpp"],
+    deps = [
+        "//libc:memset",
+        "//libc:vasprintf",
+    ],
+)
+
 libc_test(
     name = "vsprintf_test",
     srcs = ["vsprintf_test.cpp"],