# Copyright 2019 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import("//build/zircon/migrated_targets.gni")
import("//zircon/system/ulib/c/libc.gni")

group("string") {
  deps = [
    ":strerror_r",
    ":strsignal",
    ":strverscmp",
    ":wcs",
    ":wmem",
  ]
  if (!use_llvm_libc_string_functions) {
    deps += [
      ":bsd",
      ":extmem",
      ":extstr",
      ":stdmem",
      ":stdstr",
    ]
  }
}

# These are the functions the compiler produces implicit calls to.
source_set("compiler") {
  visibility = [ ":*" ]

  deps = [ "//zircon/third_party/ulib/musl:musl_internal" ]
  if (current_cpu == "arm64") {
    # These use '#include "third_party/lib/cortex-strings/src/aarch64/..."'.
    include_dirs = [ "//zircon/" ]
    sources = [
      "aarch64/memcpy.S",
      "aarch64/memset.S",
    ]
  } else if (current_cpu == "x64") {
    sources = [
      "x86_64/memcpy.S",
      "x86_64/memset.S",
    ]
  } else {
    sources = [
      "memcpy.c",
      "memset.c",
    ]
  }

  if (zircon_toolchain != false) {
    # When compiling for libc, the C functions should be exported, so don't
    # compile with default hidden visibility.  The functions aren't annotated
    # for export so that they can be compiled in non-libc contexts where their
    # definitions need to have hidden visibility for hermetic linking.
    configs -= [ "//build/config:symbol_visibility_hidden" ]
  } else {
    # When not compiling for libc, the C functions get the default hidden
    # visibility like all other code.  But the assembly sources need -DHIDDEN
    # to tell them to use hidden visibility.
    defines = [ "HIDDEN=1" ]
  }
}

source_set("stdmem") {
  visibility = [ ":*" ]

  deps = [
    ":compiler",
    "//zircon/third_party/ulib/musl:musl_internal",
  ]
  sources = [ "memrchr.c" ]
  if (current_cpu == "arm64") {
    # These use '#include "third_party/lib/cortex-strings/src/aarch64/..."'.
    include_dirs = [ "//zircon/" ]
    sources += [
      "aarch64/memchr.S",
      "aarch64/memcmp.S",
      "aarch64/memmove.S",
    ]
  } else {
    sources += [
      "memchr.c",
      "memcmp.c",
    ]
    if (current_cpu == "x64") {
      sources += [ "x86_64/memmove.S" ]
    } else {
      sources += [ "memmove.c" ]
    }
  }

  if (zircon_toolchain != false) {
    configs -= [ "//build/config:symbol_visibility_hidden" ]
  } else {
    defines = [ "HIDDEN=1" ]
  }
}

source_set("extmem") {
  visibility = [ ":*" ]

  deps = [ "//zircon/third_party/ulib/musl:musl_internal" ]
  sources = [
    "memccpy.c",
    "memmem.c",
  ]
  if (current_cpu == "x64" && toolchain_variant.tags + [ "asan" ] -
                              [ "asan" ] == toolchain_variant.tags) {
    # Only use the assembly version if x86-64 and not sanitized.
    sources += [ "x86_64/mempcpy.S" ]
  } else {
    sources += [ "mempcpy.c" ]
  }

  if (zircon_toolchain != false) {
    configs -= [ "//build/config:symbol_visibility_hidden" ]
  } else {
    defines = [ "HIDDEN=1" ]
  }

  # TODO(https://fxbug.dev/42136089): delete the below and fix compiler warnings
  configs += [ "//build/config:Wno-conversion" ]
}

source_set("minimal_str") {
  visibility = [ ":*" ]

  deps = [ "//zircon/third_party/ulib/musl:musl_internal" ]
  if (current_cpu == "arm64") {
    # These use '#include "third_party/lib/cortex-strings/src/aarch64/..."'.
    include_dirs = [ "//zircon/" ]
    sources = [
      "aarch64/strlen.S",
      "aarch64/strncmp.S",
    ]
  } else {
    sources = [
      "strlen.c",
      "strncmp.c",
    ]
  }

  if (zircon_toolchain != false) {
    configs -= [ "//build/config:symbol_visibility_hidden" ]
  } else {
    defines = [ "HIDDEN=1" ]
  }
}

source_set("stdstr") {
  visibility = [ ":*" ]

  deps = [
    ":minimal_str",
    "//zircon/third_party/ulib/musl:musl_internal",
  ]
  sources = [
    "strcat.c",
    "strcspn.c",
    "strdup.c",
    "strncat.c",
    "strncpy.c",
    "strpbrk.c",
    "strrchr.c",
    "strspn.c",
    "strstr.c",
    "strtok.c",
    "strtok_r.c",
  ]
  if (current_cpu == "arm64") {
    # These use '#include "third_party/lib/cortex-strings/src/aarch64/..."'.
    include_dirs = [ "//zircon/" ]
    sources += [
      "aarch64/strchr.S",
      "aarch64/strcmp.S",
      "aarch64/strcpy.S",
    ]
  } else {
    sources += [
      "strchr.c",
      "strcmp.c",
      "strcpy.c",
    ]
  }

  if (zircon_toolchain != false) {
    configs -= [ "//build/config:symbol_visibility_hidden" ]
  } else {
    defines = [ "HIDDEN=1" ]
  }

  # TODO(https://fxbug.dev/42136089): delete the below and fix compiler warnings
  configs += [ "//build/config:Wno-conversion" ]
}

source_set("strerror_r") {
  visibility = [
    ":*",
    "//zircon/system/ulib/c/*",
  ]

  deps = [ "//zircon/third_party/ulib/musl:musl_internal" ]
  sources = [ "strerror_r.c" ]
  if (zircon_toolchain != false) {
    configs -= [ "//build/config:symbol_visibility_hidden" ]
  }
}

source_set("strsignal") {
  visibility = [
    ":*",
    "//zircon/system/ulib/c/*",
  ]

  deps = [ "//zircon/third_party/ulib/musl:musl_internal" ]
  sources = [ "strsignal.c" ]
  if (zircon_toolchain != false) {
    configs -= [ "//build/config:symbol_visibility_hidden" ]
  }
}

source_set("strverscmp") {
  visibility = [
    ":*",
    "//zircon/system/ulib/c/*",
  ]

  deps = [ "//zircon/third_party/ulib/musl:musl_internal" ]
  sources = [ "strverscmp.c" ]
  if (zircon_toolchain != false) {
    configs -= [ "//build/config:symbol_visibility_hidden" ]
  }
}

source_set("extstr") {
  visibility = [ ":*" ]

  deps = [
    ":strverscmp",
    "//zircon/third_party/ulib/musl:musl_internal",
  ]
  sources = [
    "stpcpy.c",
    "stpncpy.c",
    "strcasecmp.c",
    "strcasestr.c",
    "strlcat.c",
    "strlcpy.c",
    "strncasecmp.c",
    "strndup.c",
    "strsep.c",
  ]
  if (current_cpu == "arm64") {
    # These use '#include "third_party/lib/cortex-strings/src/aarch64/..."'.
    include_dirs = [ "//zircon/" ]
    sources += [
      "//zircon/third_party/lib/cortex-strings/src/aarch64/strnlen.S",
      "aarch64/strchrnul.S",
    ]
  } else {
    sources += [
      "strchrnul.c",
      "strnlen.c",
    ]
  }

  if (zircon_toolchain != false) {
    configs -= [ "//build/config:symbol_visibility_hidden" ]
  } else {
    defines = [ "HIDDEN=1" ]
  }
}

source_set("bsd") {
  visibility = [ ":*" ]

  deps = [ "//zircon/third_party/ulib/musl:musl_internal" ]
  sources = [
    "bcmp.c",
    "bcopy.c",
    "bzero.c",
    "index.c",
    "rindex.c",
    "swab.c",
  ]

  if (zircon_toolchain != false) {
    configs -= [ "//build/config:symbol_visibility_hidden" ]
  } else {
    defines = [ "HIDDEN=1" ]
  }
}

source_set("wcs") {
  visibility = [ ":*" ]

  deps = [ "//zircon/third_party/ulib/musl:musl_internal" ]
  sources = [
    "wcpcpy.c",
    "wcpncpy.c",
    "wcscasecmp.c",
    "wcscat.c",
    "wcschr.c",
    "wcscmp.c",
    "wcscpy.c",
    "wcscspn.c",
    "wcsdup.c",
    "wcslen.c",
    "wcsncasecmp.c",
    "wcsncat.c",
    "wcsncmp.c",
    "wcsncpy.c",
    "wcsnlen.c",
    "wcspbrk.c",
    "wcsrchr.c",
    "wcsspn.c",
    "wcsstr.c",
    "wcstok.c",
    "wcswcs.c",
  ]

  if (zircon_toolchain != false) {
    configs -= [ "//build/config:symbol_visibility_hidden" ]
  } else {
    defines = [ "HIDDEN=1" ]
  }
}

source_set("wmem") {
  visibility = [ ":*" ]

  deps = [ "//zircon/third_party/ulib/musl:musl_internal" ]
  sources = [
    "wmemchr.c",
    "wmemcmp.c",
    "wmemcpy.c",
    "wmemmove.c",
    "wmemset.c",
  ]

  if (zircon_toolchain != false) {
    configs -= [ "//build/config:symbol_visibility_hidden" ]
  } else {
    defines = [ "HIDDEN=1" ]
  }
}