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/* -*-c-*- -------------- mix_src_file.c :
* Implementation of the functions declared in mix_src_file.h
* ------------------------------------------------------------------
* Copyright (C) 2000, 2001, 2007 Free Software Foundation, Inc.
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include <ctype.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include "mix_src_file.h"
/* the MIXAL source file type */
struct mix_src_file_t
{
gchar *path; /* the path to the disk file */
GPtrArray *lines; /* an array of the file lines */
guint lineno; /* the number of lines */
};
/* format a source line */
static gchar *
format_line_ (gchar *line)
{
const gchar *label, *op, *rest;
gint k = 0;
if (!line) return line;
if (line[0] == '*' || strlen(line) == 0)
return g_strdup (line);
if (isspace (line[0]))
{
label = " ";
while (line[k] && isspace (line[k])) ++k;
}
else
{
label = line;
while (line[k] && !isspace (line[k])) ++k;
while (line[k] && isspace (line[k])) ++k;
}
if (line[k])
{
line[k - 1] = 0;
op = line + k;
while (line[k] && !isspace (line[k])) ++k;
while (line[k] && isspace (line[k])) ++k;
line[k - 1] = 0;
rest = (line[k]) ? line + k: "";
}
else
{
op = rest = "";
}
return g_strdup_printf ("%-11s %-5s %s", label, op, rest);
}
/* load the source file lines into memory */
static gboolean
load_file_ (mix_src_file_t *file)
{
mix_file_t *mf = mix_file_new_with_def_ext (file->path,
mix_io_READ,
MIX_SRC_DEFEXT);
if (mf != NULL)
{
enum {BUFFER_SIZE = 256};
static gchar BUFFER[BUFFER_SIZE];
FILE *f = mix_file_to_FILE (mf);
file->lines = g_ptr_array_new ();
file->lineno = 0;
while (fgets (BUFFER, BUFFER_SIZE, f) == BUFFER)
{
g_ptr_array_add (file->lines, (gpointer) format_line_ (BUFFER));
file->lineno++;
}
mix_file_delete (mf);
return TRUE;
}
return FALSE;
}
/* create a new src file from an existing disk file */
mix_src_file_t *
mix_src_file_new_for_read (const gchar *path)
{
mix_src_file_t *result = g_new (mix_src_file_t, 1);
result->lines = NULL;
result->path = g_strdup (path);
result->lineno = 0;
return result;
}
/* destroy a src file object */
void
mix_src_file_delete (mix_src_file_t *src)
{
g_return_if_fail (src != NULL);
if (src->lines) g_ptr_array_free (src->lines, TRUE);
g_free (src->path);
g_free (src);
}
/* get the source file path */
const gchar *
mix_src_file_get_path (const mix_src_file_t *src)
{
g_return_val_if_fail (src != NULL, NULL);
return src->path;
}
/* get a given line of the source file */
const gchar *
mix_src_file_get_line (const mix_src_file_t *src, guint lineno)
{
g_return_val_if_fail (src != NULL, NULL);
if (src->lines == NULL && !load_file_ ((mix_src_file_t*)src))
return NULL;
if (lineno > src->lineno || lineno == 0)
return NULL;
return (gchar *)g_ptr_array_index (src->lines, lineno - 1);
}
/* get the total no. of lines in the file */
guint
mix_src_file_get_line_no (const mix_src_file_t *src)
{
g_return_val_if_fail (src != NULL, 0);
if (src->lines == NULL && !load_file_ ((mix_src_file_t*)src))
return 0;
return src->lineno;
}
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