f2a7f83595
Add support for getenv as defined by the Open Group's "System Interface & Header" in https://pubs.opengroup.org/onlinepubs/7908799/xsh/getenv.html getenv requires a standard way of accessing the environment, so a pointer to the environment is added to the startup in crt1. Consquently, this function is not usable on top of other libcs. Added starts_with method to StringView. getenv function uses it. Co-authored-by: Jeff Bailey <jeffbailey@google.com> Reviewed By: sivachandra, rtenneti Differential Revision: https://reviews.llvm.org/D119403
46 lines
1.7 KiB
C++
46 lines
1.7 KiB
C++
//===-- Unittests for getenv ----------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "loader_test.h"
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#include "src/stdlib/getenv.h"
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static bool my_streq(const char *lhs, const char *rhs) {
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if (lhs == rhs)
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return true;
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if (((lhs == static_cast<char *>(nullptr)) &&
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(rhs != static_cast<char *>(nullptr))) ||
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((lhs != static_cast<char *>(nullptr)) &&
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(rhs == static_cast<char *>(nullptr)))) {
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return false;
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}
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const char *l, *r;
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for (l = lhs, r = rhs; *l != '\0' && *r != '\0'; ++l, ++r)
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if (*l != *r)
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return false;
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return *l == '\0' && *r == '\0';
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}
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int main(int argc, char **argv, char **envp) {
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ASSERT_TRUE(my_streq(__llvm_libc::getenv(""), static_cast<char *>(nullptr)));
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ASSERT_TRUE(my_streq(__llvm_libc::getenv("="), static_cast<char *>(nullptr)));
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ASSERT_TRUE(my_streq(__llvm_libc::getenv("MISSING ENV VARIABLE"),
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static_cast<char *>(nullptr)));
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ASSERT_FALSE(
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my_streq(__llvm_libc::getenv("PATH"), static_cast<char *>(nullptr)));
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ASSERT_TRUE(my_streq(__llvm_libc::getenv("FRANCE"), "Paris"));
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ASSERT_FALSE(my_streq(__llvm_libc::getenv("FRANCE"), "Berlin"));
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ASSERT_TRUE(my_streq(__llvm_libc::getenv("GERMANY"), "Berlin"));
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ASSERT_TRUE(
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my_streq(__llvm_libc::getenv("FRANC"), static_cast<char *>(nullptr)));
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ASSERT_TRUE(
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my_streq(__llvm_libc::getenv("FRANCE1"), static_cast<char *>(nullptr)));
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return 0;
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}
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