#include "subsegs.h"
#include "bfdver.h"
#include <time.h>
+#include <stdarg.h>
#ifndef NO_LISTING
static void listing_message (const char *, const char *);
static file_info_type *file_info (const char *);
static void new_frag (void);
-static char *buffer_line (file_info_type *, char *, unsigned int);
static void listing_page (list_info_type *);
static unsigned int calc_hex (list_info_type *);
static void print_lines (list_info_type *, unsigned int, char *, unsigned int);
static void list_symbol_table (void);
-static void print_source (file_info_type *, list_info_type *, char *, unsigned int);
static int debugging_pseudo (list_info_type *, const char *);
static void listing_listing (char *);
/* This function returns the next source line from the file supplied,
truncated to size. It appends a fake line to the end of each input
- file to make. */
+ file to make using the returned buffer simpler. */
static char *
buffer_line (file_info_type *file, char *line, unsigned int size)
{
unsigned int count = 0;
int c;
-
char *p = line;
/* If we couldn't open the file, return an empty line. */
fseek (last_open_file, file->pos, SEEK_SET);
}
- c = fgetc (last_open_file);
-
/* Leave room for null. */
size -= 1;
+ c = fgetc (last_open_file);
+
while (c != EOF && c != '\n' && c != '\r')
{
if (count < size)
count++;
c = fgetc (last_open_file);
-
}
/* If '\r' is followed by '\n', swallow that. Likewise, if '\n'
if (c == '\r' || c == '\n')
{
int next = fgetc (last_open_file);
+
if ((c == '\r' && next != '\n')
|| (c == '\n' && next != '\r'))
ungetc (next, last_open_file);
return line;
}
+
+/* This function rewinds the requested file back to the line requested,
+ reads it in again into the buffer provided and then restores the file
+ back to its original location. */
+
+static char *
+rebuffer_line (file_info_type * file,
+ unsigned int linenum,
+ char * buffer,
+ unsigned int size)
+{
+ unsigned int count = 0;
+ unsigned int current_line = 1;
+ char * p = buffer;
+ long pos;
+ int c;
+
+ /* Sanity checks. */
+ if (file == NULL || buffer == NULL || size == 0 || file->linenum <= linenum)
+ return "";
+
+ /* Check the cache and see if we last used this file. */
+ if (last_open_file_info == NULL || file != last_open_file_info)
+ {
+ if (last_open_file)
+ {
+ last_open_file_info->pos = ftell (last_open_file);
+ fclose (last_open_file);
+ }
+
+ /* Open the file in the binary mode so that ftell above can
+ return a reliable value that we can feed to fseek below. */
+ last_open_file_info = file;
+ last_open_file = fopen (file->filename, FOPEN_RB);
+ if (last_open_file == NULL)
+ {
+ file->at_end = 1;
+ return "";
+ }
+
+ /* Seek to where we were last time this file was open. */
+ if (file->pos)
+ fseek (last_open_file, file->pos, SEEK_SET);
+ }
+
+ /* Remember where we are in the current file. */
+ pos = ftell (last_open_file);
+
+ /* Go back to the beginning. */
+ fseek (last_open_file, 0, SEEK_SET);
+
+ /* Skip lines prior to the one we are interested in. */
+ while (current_line < linenum)
+ {
+ /* fgets only stops on newlines and has a size limit,
+ so we read one character at a time instead. */
+ do
+ {
+ c = fgetc (last_open_file);
+ }
+ while (c != EOF && c != '\n' && c != '\r');
+
+ ++ current_line;
+
+ if (c == '\r' || c == '\n')
+ {
+ int next = fgetc (last_open_file);
+
+ /* If '\r' is followed by '\n', swallow that. Likewise, if '\n'
+ is followed by '\r', swallow that as well. */
+ if ((c == '\r' && next != '\n')
+ || (c == '\n' && next != '\r'))
+ ungetc (next, last_open_file);
+ }
+ }
+
+ /* Leave room for the nul at the end of the buffer. */
+ size -= 1;
+
+ /* Read in the line. */
+ c = fgetc (last_open_file);
+
+ while (c != EOF && c != '\n' && c != '\r')
+ {
+ if (count < size)
+ *p++ = c;
+ count++;
+
+ c = fgetc (last_open_file);
+ }
+
+ /* If '\r' is followed by '\n', swallow that. Likewise, if '\n'
+ is followed by '\r', swallow that as well. */
+ if (c == '\r' || c == '\n')
+ {
+ int next = fgetc (last_open_file);
+
+ if ((c == '\r' && next != '\n')
+ || (c == '\n' && next != '\r'))
+ ungetc (next, last_open_file);
+ }
+
+ /* Terminate the line. */
+ *p++ = 0;
+
+ /* Reset the file position. */
+ fseek (last_open_file, pos, SEEK_SET);
+
+ return buffer;
+}
+
static const char *fn;
static unsigned int eject; /* Eject pending */
}
}
+/* Print a line into the list_file. Update the line count
+ and if necessary start a new page. */
+
+static void
+emit_line (list_info_type * list, const char * format, ...)
+{
+ va_list args;
+
+ va_start (args, format);
+
+ vfprintf (list_file, format, args);
+ on_page++;
+ listing_page (list);
+
+ va_end (args);
+}
+
static unsigned int
calc_hex (list_info_type *list)
{
for (idx = 0; idx < nchars; idx++)
fprintf (list_file, " ");
- fprintf (list_file, "\t%s\n", string ? string : "");
-
- on_page++;
-
- listing_page (0);
-
+ emit_line (NULL, "\t%s\n", string ? string : "");
return;
}
for (; idx < nchars; idx++)
fprintf (list_file, " ");
- fprintf (list_file, "\t%s\n", string ? string : "");
- on_page++;
- listing_page (list);
+ emit_line (list, "\t%s\n", string ? string : "");
if (list->message)
- {
- fprintf (list_file, "**** %s\n", list->message);
- listing_page (list);
- on_page++;
- }
+ emit_line (list, "**** %s\n", list->message);
for (lines = 0;
lines < (unsigned int) listing_lhs_cont_lines
}
}
- fprintf (list_file, "\n");
- on_page++;
- listing_page (list);
+ emit_line (list, "\n");
}
}
symbolS *ptr;
eject = 1;
- listing_page (0);
+ listing_page (NULL);
for (ptr = symbol_rootP; ptr != (symbolS *) NULL; ptr = symbol_next (ptr))
{
}
on_page++;
- listing_page (0);
+ listing_page (NULL);
}
}
fprintf (list_file, "NO DEFINED SYMBOLS\n");
on_page++;
}
- fprintf (list_file, "\n");
- on_page++;
- listing_page (0);
+ emit_line (NULL, "\n");
got_some = 0;
if (!got_some)
{
got_some = 1;
- fprintf (list_file, "UNDEFINED SYMBOLS\n");
- on_page++;
- listing_page (0);
+
+ emit_line (NULL, "UNDEFINED SYMBOLS\n");
}
- fprintf (list_file, "%s\n", S_GET_NAME (ptr));
- on_page++;
- listing_page (0);
+
+ emit_line (NULL, "%s\n", S_GET_NAME (ptr));
}
}
}
+
if (!got_some)
- {
- fprintf (list_file, "NO UNDEFINED SYMBOLS\n");
- on_page++;
- listing_page (0);
- }
+ emit_line (NULL, "NO UNDEFINED SYMBOLS\n");
}
+typedef struct cached_line
+{
+ file_info_type * file;
+ unsigned int line;
+ char buffer [LISTING_RHS_WIDTH];
+} cached_line;
+
static void
-print_source (file_info_type *current_file, list_info_type *list,
- char *buffer, unsigned int width)
+print_source (file_info_type * current_file,
+ list_info_type * list,
+ unsigned int width)
{
+#define NUM_CACHE_LINES 3
+ static cached_line cached_lines[NUM_CACHE_LINES];
+ static int next_free_line = 0;
+ cached_line * cache;
+
+ if (current_file->linenum > list->hll_line
+ && list->hll_line > 0)
+ {
+ /* This can happen with modern optimizing compilers. The source
+ lines from the high level language input program are split up
+ and interleaved, meaning the line number we want to display
+ (list->hll_line) can have already been displayed. We have
+ three choices:
+
+ a. Do nothing, since we have already displayed the source
+ line. This was the old behaviour.
+
+ b. Display the particular line requested again, but only
+ that line. This is the new behaviour.
+
+ c. Display the particular line requested again and reset
+ the current_file->line_num value so that we redisplay
+ all the following lines as well the next time we
+ encounter a larger line number. */
+ int i;
+
+ /* Check the cache, maybe we already have the line saved. */
+ for (i = 0; i < NUM_CACHE_LINES; i++)
+ if (cached_lines[i].file == current_file
+ && cached_lines[i].line == list->hll_line)
+ {
+ cache = cached_lines + i;
+ break;
+ }
+
+ if (i == NUM_CACHE_LINES)
+ {
+ cache = cached_lines + next_free_line;
+ next_free_line ++;
+ if (next_free_line == NUM_CACHE_LINES)
+ next_free_line = 0;
+
+ cache->file = current_file;
+ cache->line = list->hll_line;
+ cache->buffer[0] = 0;
+ rebuffer_line (current_file, cache->line, cache->buffer, width);
+ }
+
+ emit_line (list, "%4u:%-13s **** %s\n",
+ cache->line, cache->file->filename, cache->buffer);
+ return;
+ }
+
if (!current_file->at_end)
{
+ int num_lines_shown = 0;
+
while (current_file->linenum < list->hll_line
&& !current_file->at_end)
{
- char *p = buffer_line (current_file, buffer, width);
+ cached_line * cache = cached_lines + next_free_line;
+ char *p;
+
+ cache->file = current_file;
+ cache->line = current_file->linenum;
+ cache->buffer[0] = 0;
+ p = buffer_line (current_file, cache->buffer, width);
+
+ /* Cache optimization: If printing a group of lines
+ cache the first and last lines in the group. */
+ if (num_lines_shown == 0)
+ {
+ next_free_line ++;
+ if (next_free_line == NUM_CACHE_LINES)
+ next_free_line = 0;
+ }
- fprintf (list_file, "%4u:%-13s **** %s\n", current_file->linenum,
- current_file->filename, p);
- on_page++;
- listing_page (list);
+ emit_line (list, "%4u:%-13s **** %s\n",
+ cache->line, cache->file->filename, p);
+ num_lines_shown ++;
}
}
}
current_hll_file = list->hll_file;
if (current_hll_file && list->hll_line && (listing & LISTING_HLL))
- print_source (current_hll_file, list, buffer, width);
+ print_source (current_hll_file, list, width);
if (list->line_contents)
{
{
/* Print the stuff on the first line. */
eject = 1;
- listing_page (0);
+ listing_page (NULL);
fprintf (list_file,
_(" GNU assembler version %s (%s)\n\t using BFD version %s."),
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