1 files changed, 0 insertions, 383 deletions
diff --git a/prism/util/pm_string.c b/prism/util/pm_string.c
deleted file mode 100644
index 75422fbdf2..0000000000
--- a/prism/util/pm_string.c
+++ /dev/null
@@ -1,383 +0,0 @@
-#include "prism/util/pm_string.h"
-
-/**
- * Returns the size of the pm_string_t struct. This is necessary to allocate the
- * correct amount of memory in the FFI backend.
- */
-PRISM_EXPORTED_FUNCTION size_t
-pm_string_sizeof(void) {
-    return sizeof(pm_string_t);
-}
-
-/**
- * Initialize a shared string that is based on initial input.
- */
-void
-pm_string_shared_init(pm_string_t *string, const uint8_t *start, const uint8_t *end) {
-    assert(start <= end);
-
-    *string = (pm_string_t) {
-        .type = PM_STRING_SHARED,
-        .source = start,
-        .length = (size_t) (end - start)
-    };
-}
-
-/**
- * Initialize an owned string that is responsible for freeing allocated memory.
- */
-void
-pm_string_owned_init(pm_string_t *string, uint8_t *source, size_t length) {
-    *string = (pm_string_t) {
-        .type = PM_STRING_OWNED,
-        .source = source,
-        .length = length
-    };
-}
-
-/**
- * Initialize a constant string that doesn't own its memory source.
- */
-void
-pm_string_constant_init(pm_string_t *string, const char *source, size_t length) {
-    *string = (pm_string_t) {
-        .type = PM_STRING_CONSTANT,
-        .source = (const uint8_t *) source,
-        .length = length
-    };
-}
-
-#ifdef _WIN32
-/**
- * Represents a file handle on Windows, where the path will need to be freed
- * when the file is closed.
- */
-typedef struct {
-    /** The path to the file, which will become allocated memory. */
-    WCHAR *path;
-
-    /** The handle to the file, which will start as uninitialized memory. */
-    HANDLE file;
-} pm_string_file_handle_t;
-
-/**
- * Open the file indicated by the filepath parameter for reading on Windows.
- * Perform any kind of normalization that needs to happen on the filepath.
- */
-static pm_string_init_result_t
-pm_string_file_handle_open(pm_string_file_handle_t *handle, const char *filepath) {
-    int length = MultiByteToWideChar(CP_UTF8, 0, filepath, -1, NULL, 0);
-    if (length == 0) return PM_STRING_INIT_ERROR_GENERIC;
-
-    handle->path = xmalloc(sizeof(WCHAR) * ((size_t) length));
-    if ((handle->path == NULL) || (MultiByteToWideChar(CP_UTF8, 0, filepath, -1, handle->path, length) == 0)) {
-        xfree(handle->path);
-        return PM_STRING_INIT_ERROR_GENERIC;
-    }
-
-    handle->file = CreateFileW(handle->path, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_READONLY, NULL);
-    if (handle->file == INVALID_HANDLE_VALUE) {
-        pm_string_init_result_t result = PM_STRING_INIT_ERROR_GENERIC;
-
-        if (GetLastError() == ERROR_ACCESS_DENIED) {
-            DWORD attributes = GetFileAttributesW(handle->path);
-            if ((attributes != INVALID_FILE_ATTRIBUTES) && (attributes & FILE_ATTRIBUTE_DIRECTORY)) {
-                result = PM_STRING_INIT_ERROR_DIRECTORY;
-            }
-        }
-
-        xfree(handle->path);
-        return result;
-    }
-
-    return PM_STRING_INIT_SUCCESS;
-}
-
-/**
- * Close the file handle and free the path.
- */
-static void
-pm_string_file_handle_close(pm_string_file_handle_t *handle) {
-    xfree(handle->path);
-    CloseHandle(handle->file);
-}
-#endif
-
-/**
- * Read the file indicated by the filepath parameter into source and load its
- * contents and size into the given `pm_string_t`. The given `pm_string_t`
- * should be freed using `pm_string_free` when it is no longer used.
- *
- * We want to use demand paging as much as possible in order to avoid having to
- * read the entire file into memory (which could be detrimental to performance
- * for large files). This means that if we're on windows we'll use
- * `MapViewOfFile`, on POSIX systems that have access to `mmap` we'll use
- * `mmap`, and on other POSIX systems we'll use `read`.
- */
-PRISM_EXPORTED_FUNCTION pm_string_init_result_t
-pm_string_mapped_init(pm_string_t *string, const char *filepath) {
-#ifdef _WIN32
-    // Open the file for reading.
-    pm_string_file_handle_t handle;
-    pm_string_init_result_t result = pm_string_file_handle_open(&handle, filepath);
-    if (result != PM_STRING_INIT_SUCCESS) return result;
-
-    // Get the file size.
-    DWORD file_size = GetFileSize(handle.file, NULL);
-    if (file_size == INVALID_FILE_SIZE) {
-        pm_string_file_handle_close(&handle);
-        return PM_STRING_INIT_ERROR_GENERIC;
-    }
-
-    // If the file is empty, then we don't need to do anything else, we'll set
-    // the source to a constant empty string and return.
-    if (file_size == 0) {
-        pm_string_file_handle_close(&handle);
-        const uint8_t source[] = "";
-        *string = (pm_string_t) { .type = PM_STRING_CONSTANT, .source = source, .length = 0 };
-        return PM_STRING_INIT_SUCCESS;
-    }
-
-    // Create a mapping of the file.
-    HANDLE mapping = CreateFileMapping(handle.file, NULL, PAGE_READONLY, 0, 0, NULL);
-    if (mapping == NULL) {
-        pm_string_file_handle_close(&handle);
-        return PM_STRING_INIT_ERROR_GENERIC;
-    }
-
-    // Map the file into memory.
-    uint8_t *source = (uint8_t *) MapViewOfFile(mapping, FILE_MAP_READ, 0, 0, 0);
-    CloseHandle(mapping);
-    pm_string_file_handle_close(&handle);
-
-    if (source == NULL) {
-        return PM_STRING_INIT_ERROR_GENERIC;
-    }
-
-    *string = (pm_string_t) { .type = PM_STRING_MAPPED, .source = source, .length = (size_t) file_size };
-    return PM_STRING_INIT_SUCCESS;
-#elif defined(_POSIX_MAPPED_FILES)
-    // Open the file for reading
-    int fd = open(filepath, O_RDONLY);
-    if (fd == -1) {
-        return PM_STRING_INIT_ERROR_GENERIC;
-    }
-
-    // Stat the file to get the file size
-    struct stat sb;
-    if (fstat(fd, &sb) == -1) {
-        close(fd);
-        return PM_STRING_INIT_ERROR_GENERIC;
-    }
-
-    // Ensure it is a file and not a directory
-    if (S_ISDIR(sb.st_mode)) {
-        close(fd);
-        return PM_STRING_INIT_ERROR_DIRECTORY;
-    }
-
-    // mmap the file descriptor to virtually get the contents
-    size_t size = (size_t) sb.st_size;
-    uint8_t *source = NULL;
-
-    if (size == 0) {
-        close(fd);
-        const uint8_t source[] = "";
-        *string = (pm_string_t) { .type = PM_STRING_CONSTANT, .source = source, .length = 0 };
-        return PM_STRING_INIT_SUCCESS;
-    }
-
-    source = mmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0);
-    if (source == MAP_FAILED) {
-        close(fd);
-        return PM_STRING_INIT_ERROR_GENERIC;
-    }
-
-    close(fd);
-    *string = (pm_string_t) { .type = PM_STRING_MAPPED, .source = source, .length = size };
-    return PM_STRING_INIT_SUCCESS;
-#else
-    return pm_string_file_init(string, filepath);
-#endif
-}
-
-/**
- * Read the file indicated by the filepath parameter into source and load its
- * contents and size into the given `pm_string_t`. The given `pm_string_t`
- * should be freed using `pm_string_free` when it is no longer used.
- */
-PRISM_EXPORTED_FUNCTION pm_string_init_result_t
-pm_string_file_init(pm_string_t *string, const char *filepath) {
-#ifdef _WIN32
-    // Open the file for reading.
-    pm_string_file_handle_t handle;
-    pm_string_init_result_t result = pm_string_file_handle_open(&handle, filepath);
-    if (result != PM_STRING_INIT_SUCCESS) return result;
-
-    // Get the file size.
-    DWORD file_size = GetFileSize(handle.file, NULL);
-    if (file_size == INVALID_FILE_SIZE) {
-        pm_string_file_handle_close(&handle);
-        return PM_STRING_INIT_ERROR_GENERIC;
-    }
-
-    // If the file is empty, then we don't need to do anything else, we'll set
-    // the source to a constant empty string and return.
-    if (file_size == 0) {
-        pm_string_file_handle_close(&handle);
-        const uint8_t source[] = "";
-        *string = (pm_string_t) { .type = PM_STRING_CONSTANT, .source = source, .length = 0 };
-        return PM_STRING_INIT_SUCCESS;
-    }
-
-    // Create a buffer to read the file into.
-    uint8_t *source = xmalloc(file_size);
-    if (source == NULL) {
-        pm_string_file_handle_close(&handle);
-        return PM_STRING_INIT_ERROR_GENERIC;
-    }
-
-    // Read the contents of the file
-    DWORD bytes_read;
-    if (!ReadFile(handle.file, source, file_size, &bytes_read, NULL)) {
-        pm_string_file_handle_close(&handle);
-        return PM_STRING_INIT_ERROR_GENERIC;
-    }
-
-    // Check the number of bytes read
-    if (bytes_read != file_size) {
-        xfree(source);
-        pm_string_file_handle_close(&handle);
-        return PM_STRING_INIT_ERROR_GENERIC;
-    }
-
-    pm_string_file_handle_close(&handle);
-    *string = (pm_string_t) { .type = PM_STRING_OWNED, .source = source, .length = (size_t) file_size };
-    return PM_STRING_INIT_SUCCESS;
-#elif defined(PRISM_HAS_FILESYSTEM)
-    // Open the file for reading
-    int fd = open(filepath, O_RDONLY);
-    if (fd == -1) {
-        return PM_STRING_INIT_ERROR_GENERIC;
-    }
-
-    // Stat the file to get the file size
-    struct stat sb;
-    if (fstat(fd, &sb) == -1) {
-        close(fd);
-        return PM_STRING_INIT_ERROR_GENERIC;
-    }
-
-    // Ensure it is a file and not a directory
-    if (S_ISDIR(sb.st_mode)) {
-        close(fd);
-        return PM_STRING_INIT_ERROR_DIRECTORY;
-    }
-
-    // Check the size to see if it's empty
-    size_t size = (size_t) sb.st_size;
-    if (size == 0) {
-        close(fd);
-        const uint8_t source[] = "";
-        *string = (pm_string_t) { .type = PM_STRING_CONSTANT, .source = source, .length = 0 };
-        return PM_STRING_INIT_SUCCESS;
-    }
-
-    size_t length = (size_t) size;
-    uint8_t *source = xmalloc(length);
-    if (source == NULL) {
-        close(fd);
-        return PM_STRING_INIT_ERROR_GENERIC;
-    }
-
-    long bytes_read = (long) read(fd, source, length);
-    close(fd);
-
-    if (bytes_read == -1) {
-        xfree(source);
-        return PM_STRING_INIT_ERROR_GENERIC;
-    }
-
-    *string = (pm_string_t) { .type = PM_STRING_OWNED, .source = source, .length = length };
-    return PM_STRING_INIT_SUCCESS;
-#else
-    (void) string;
-    (void) filepath;
-    perror("pm_string_file_init is not implemented for this platform");
-    return PM_STRING_INIT_ERROR_GENERIC;
-#endif
-}
-
-/**
- * Ensure the string is owned. If it is not, then reinitialize it as owned and
- * copy over the previous source.
- */
-void
-pm_string_ensure_owned(pm_string_t *string) {
-    if (string->type == PM_STRING_OWNED) return;
-
-    size_t length = pm_string_length(string);
-    const uint8_t *source = pm_string_source(string);
-
-    uint8_t *memory = xmalloc(length);
-    if (!memory) return;
-
-    pm_string_owned_init(string, memory, length);
-    memcpy((void *) string->source, source, length);
-}
-
-/**
- * Compare the underlying lengths and bytes of two strings. Returns 0 if the
- * strings are equal, a negative number if the left string is less than the
- * right string, and a positive number if the left string is greater than the
- * right string.
- */
-int
-pm_string_compare(const pm_string_t *left, const pm_string_t *right) {
-    size_t left_length = pm_string_length(left);
-    size_t right_length = pm_string_length(right);
-
-    if (left_length < right_length) {
-        return -1;
-    } else if (left_length > right_length) {
-        return 1;
-    }
-
-    return memcmp(pm_string_source(left), pm_string_source(right), left_length);
-}
-
-/**
- * Returns the length associated with the string.
- */
-PRISM_EXPORTED_FUNCTION size_t
-pm_string_length(const pm_string_t *string) {
-    return string->length;
-}
-
-/**
- * Returns the start pointer associated with the string.
- */
-PRISM_EXPORTED_FUNCTION const uint8_t *
-pm_string_source(const pm_string_t *string) {
-    return string->source;
-}
-
-/**
- * Free the associated memory of the given string.
- */
-PRISM_EXPORTED_FUNCTION void
-pm_string_free(pm_string_t *string) {
-    void *memory = (void *) string->source;
-
-    if (string->type == PM_STRING_OWNED) {
-        xfree(memory);
-#ifdef PRISM_HAS_MMAP
-    } else if (string->type == PM_STRING_MAPPED && string->length) {
-#if defined(_WIN32)
-        UnmapViewOfFile(memory);
-#elif defined(_POSIX_MAPPED_FILES)
-        munmap(memory, string->length);
-#endif
-#endif /* PRISM_HAS_MMAP */
-    }
-}