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-rw-r--r--src/mds-kbdc/raw-data.c289
1 files changed, 289 insertions, 0 deletions
diff --git a/src/mds-kbdc/raw-data.c b/src/mds-kbdc/raw-data.c
new file mode 100644
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+++ b/src/mds-kbdc/raw-data.c
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+/**
+ * mds — A micro-display server
+ * Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "raw-data.h"
+
+#include "globals.h"
+
+#include <libmdsserver/macros.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+
+
+
+/**
+ * Initialise a `source_code_t*`
+ *
+ * @param this The `source_code_t*`
+ */
+void source_code_initialise(source_code_t* restrict this)
+{
+ this->lines = NULL;
+ this->real_lines = NULL;
+ this->content = NULL;
+ this->real_content = NULL;
+ this->line_count = 0;
+}
+
+
+/**
+ * Release all data in a `source_code_t*`
+ *
+ * @param this The `source_code_t*`
+ */
+void source_code_destroy(source_code_t* restrict this)
+{
+ free(this->lines), this->lines = NULL;
+ free(this->real_lines), this->real_lines = NULL;
+ free(this->content), this->content = NULL;
+ free(this->real_content), this->real_content = NULL;
+}
+
+
+/**
+ * Release all data in a `source_code_t*`, and free it
+ *
+ * @param this The `source_code_t*`
+ */
+void source_code_free(source_code_t* restrict this)
+{
+ free(this->lines);
+ free(this->real_lines);
+ free(this->content);
+ free(this->real_content);
+ free(this);
+}
+
+
+
+/**
+ * Read the content of a file, ignoring interruptions
+ *
+ * @param pathname The file to read
+ * @param size Output parameter for the size of the read content, in char:s
+ * @return The read content, `NULL` on error
+ */
+static char* read_file(const char* restrict pathname, size_t* restrict size)
+{
+ size_t buf_size = 8096;
+ size_t buf_ptr = 0;
+ char* restrict content = NULL;
+ char* restrict old = NULL;
+ int fd = -1;
+ ssize_t got;
+
+ /* Allocate buffer for the file's content. */
+ fail_if (xmalloc(content, buf_size, char));
+ /* Open the file to compile. */
+ fail_if ((fd = open(pathname, O_RDONLY)) < 0);
+
+ /* Read the file to compile. */
+ for (;;)
+ {
+ /* Make sure the buffer is not small. */
+ if (buf_size - buf_ptr < 2048)
+ {
+ fail_if (xxrealloc(old, content, buf_size <<= 1, char));
+ }
+ /* Read a chunk of the file. */
+ got = read(fd, content + buf_ptr, (buf_size - buf_ptr) * sizeof(char));
+ if ((got < 0) && (errno == EINTR)) continue;
+ else if (got < 0) goto pfail;
+ else if (got == 0) break;
+ buf_ptr += (size_t)got;
+ }
+
+ /* Shrink the buffer so it is not excessively large. */
+ fail_if (xxrealloc(old, content, buf_ptr, char));
+
+ /* Close file decriptor for the file. */
+ close(fd);
+
+ *size = buf_ptr;
+ return content;
+
+ pfail:
+ xperror(*argv);
+ free(old);
+ free(content);
+ if (fd >= 0)
+ close(fd);
+ return NULL;
+}
+
+
+/**
+ * Remove comments from the content
+ *
+ * @param content The code to shrink
+ * @param size The size of `content`, in char:s
+ * @return The new size of `content`, in char:s; this function cannot fail
+ */
+static size_t remove_comments(char* restrict content, size_t size)
+{
+#define t content[n_ptr++] = c
+
+ size_t n_ptr = 0, o_ptr = 0;
+ int comment = 0, quote = 0, escape = 0;
+
+ while (o_ptr < size)
+ {
+ char c = content[o_ptr++];
+ /* Remove comment */
+ if (comment)
+ {
+ if (c == '\n') t, comment = 0;
+ }
+ /* Quotes can contain comment symbols, quotes by also contain escapes. */
+ else if (escape) t, escape = 0;
+ else if (quote)
+ {
+ t;
+ if (c == '\\') escape = 1;
+ else if (c == '"') quote = 0;
+ }
+ /* # is the comment symbol. */
+ else if (c == '#') comment = 1;
+ /* " is the quote symbol. */
+ else if (c == '"') t, quote = 1;
+ /* Code and whitespace. */
+ else t;
+ }
+
+ return n_ptr;
+
+#undef t
+}
+
+
+/**
+ * Create an array of each line in a text
+ *
+ * @param content The text to split, it must end with an LF.
+ * LF:s are treated as line endings rather than
+ * new lines, this means that the final LF will
+ * not create a new line in the returned array.
+ * Each LF will be replaced by a NUL-character.
+ * @param length The length of `content`.
+ * @return An array of each line in `content`. This
+ * array will be `NULL`-terminated. It will also
+ * reuse the allocate of `content`. This means
+ * that each element must not be free:d, rather
+ * you should simply free this returned allocation
+ * and the allocation of `content`. On error
+ * `NULL` is returned, and `content` will not
+ * have been modified.
+ */
+static char** line_split(char* content, size_t length)
+{
+ char** restrict lines = NULL;
+ size_t count = 0;
+ size_t i, j;
+ int new_line = 1;
+
+ for (i = 0; i < length; i++)
+ if (content[i] == '\n')
+ count++;
+
+ fail_if (xmalloc(lines, count + 1, char));
+ lines[count] = NULL;
+
+ for (i = j = 0; i < length; i++)
+ {
+ if (new_line)
+ new_line = 0, lines[j++] = content + i;
+ if (content[i] == '\n')
+ {
+ new_line = 1;
+ content[i] = '\0';
+ }
+ }
+
+ return lines;
+
+ pfail:
+ xperror(*argv);
+ return NULL;
+}
+
+
+/**
+ * Read lines of a source file
+ *
+ * @param pathname The pathname of the source file
+ * @parma source_code Output parameter for read data
+ * @return Zero on success, -1 on error
+ */
+int read_source_lines(const char* restrict pathname, source_code_t* restrict source_code)
+{
+ char* content = NULL;
+ char* real_content = NULL;
+ char* old = NULL;
+ size_t content_size;
+ size_t real_content_size;
+ char** lines = NULL;
+ char** real_lines = NULL;
+ size_t line_count = 0;
+
+ /* Read the file. */
+ content = read_file(pathname, &content_size);
+ fail_if (content == NULL);
+
+ /* Make sure the content ends with a new line. */
+ if (!content_size || (content[content_size - 1] != '\n'))
+ {
+ fail_if (xxrealloc(old, content, content_size + 1, char));
+ content[content_size++] = '\n';
+ }
+
+ /* Simplify file. */
+ fail_if (xmalloc(real_content, content_size, char));
+ memcpy(real_content, content, content_size * sizeof(char));
+ real_content_size = content_size;
+ content_size = remove_comments(content, content_size);
+ fail_if (xxrealloc(old, content, content_size, char));
+
+ /* Split by line. */
+ fail_if ((lines = line_split(content, content_size)) == NULL);
+ fail_if ((real_lines = line_split(real_content, real_content_size)) == NULL);
+
+ /* Count the number of lines. */
+ while (lines[line_count] != NULL)
+ line_count++;
+
+ source_code->lines = lines;
+ source_code->real_lines = real_lines;
+ source_code->content = content;
+ source_code->real_content = real_content;
+ source_code->line_count = line_count;
+ return 0;
+
+ pfail:
+ xperror(*argv);
+ free(old);
+ free(content);
+ free(real_content);
+ free(lines);
+ free(real_lines);
+ return -1;
+}
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