116 lines
1.9 KiB
C
116 lines
1.9 KiB
C
#include <stdio.h>
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#include "em.h"
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arith cur_pos = 0;
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dist( lab)
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char *lab;
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/* Just output a reference which must be filled in on a second pass */
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{
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out( "($%s$ - %ld)", lab, cur_pos);
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}
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#define MAX_LABEL 10
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#define TRUE 1
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#define FALSE 0
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struct t_label {
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char *lab;
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arith position;
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};
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struct t_label label_list[ MAX_LABEL];
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int n_labs = 0;
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handle_label( lab)
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char *lab;
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/* Record position of this label */
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{
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char *Salloc();
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if ( n_labs >= MAX_LABEL)
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error( "Too many labels!!\n");
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else {
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label_list[ n_labs].lab = Salloc( lab, strlen( lab) + 1);
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label_list[ n_labs++].position = cur_pos;
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}
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process_label( lab);
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}
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relocate( f)
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FILE *f;
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/* Output position-count of the label in file 'f', remove also trailing $ */
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{
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char buf[256];
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int i;
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fscanf( f, " %[^$]$", buf);
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for ( i = 0; i < n_labs; i++)
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if ( strcmp( buf, label_list[i].lab) == 0) {
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out( "%ld", label_list[i].position);
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return;
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}
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error( "relocate() : can't find local label %s\n", buf);
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}
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#include <system.h>
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File *oldout;
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extern File *outfile;
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back_patch()
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/* Echo the text on file '.tmp', but replace every occurence of label-
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*reference's by its position-count. Reference of label 'foo' is '$foo$'.
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*/
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{
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FILE *save;
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char c, c1;
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sys_close( outfile);
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outfile = oldout;
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save = fopen( ".tmp", "r");
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while ( ( c = getc( save)) != EOF)
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if ( c == '$')
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relocate( save);
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else if ( c == '/') { /* skip comments */
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c = getc( save);
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out( "/%c", c);
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if ( c == '*') {
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c = getc( save);
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do {
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out( "%c", c);
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c1 = c;
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c = getc( save);
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}
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while ( !( c1 == '*' && c == '/'));
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out( "%c", c);
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}
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}
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else
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out( "%c", c);
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fclose( save);
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}
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save_output()
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{
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extern arith cur_pos;
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extern int n_labs;
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oldout = outfile;
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if ( ! sys_open( ".tmp", OP_WRITE, &outfile))
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fprint( STDERR, "can't open .tmp\n");
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cur_pos = 0;
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n_labs = 0;
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}
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