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This commit is contained in:
nanochess
parent
8d640bdeaa
commit
2554866b1b
524
pretty6502.c
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524
pretty6502.c
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/*
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** Pretty6502
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**
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** by Oscar Toledo G.
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**
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** © Copyright 2017 Oscar Toledo G.
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**
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** Creation date: Nov/03/2017.
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** Revision date: Nov/06/2017. Processor selection. Indents nested IF/ENDIF. Tries to preserve vertical structure of comments. Allows label in its own line.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#define VERSION "v0.2"
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int tabs;
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/*
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** 6502 mnemonics
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*/
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char *mnemonics_6502[] = {
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"adc", "anc", "and", "ane", "arr", "asl", "asr", "bcc",
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"bcs", "beq", "bit", "bmi", "bne", "bpl", "brk", "bvc",
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"bvs", "clc", "cld", "cli", "clv", "cmp", "cpx", "cpy",
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"dcp", "dec", "dex", "dey", "eor", "inc", "inx", "iny",
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"isb", "jmp", "jsr", "las", "lax", "lda", "ldx", "ldy",
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"lsr", "lxa", "nop", "ora", "pha", "php", "pla", "plp",
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"rla", "rol", "ror", "rra", "rti", "rts", "sax", "sbc",
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"sbx", "sec", "sed", "sei", "sha", "shs", "shx", "shy",
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"slo", "sre", "sta", "stx", "sty", "tax", "tay", "tsx",
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"txa", "txs", "tya", NULL,
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};
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#define DONT_RELOCATE_LABEL 0x01
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#define LEVEL_IN 0x02
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#define LEVEL_OUT 0x04
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#define LEVEL_MINUS 0x08
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/*
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** DASM directives
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*/
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struct {
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char *directive;
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int flags;
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} directives_dasm[] = {
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"=", DONT_RELOCATE_LABEL,
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"align", 0,
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"byte", 0,
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"dc", 0,
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"ds", 0,
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"dv", 0,
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"echo", 0,
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"eif", LEVEL_OUT,
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"else", LEVEL_MINUS,
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"end", 0,
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"endif", LEVEL_OUT,
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"endm", LEVEL_OUT,
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"eqm", DONT_RELOCATE_LABEL,
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"equ", DONT_RELOCATE_LABEL,
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"err", 0,
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"hex", 0,
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"if", LEVEL_IN,
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"ifconst", LEVEL_IN,
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"ifnconst", LEVEL_IN,
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"incbin", 0,
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"incdir", 0,
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"include", 0,
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"list", 0,
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"long", 0,
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"mac", LEVEL_IN,
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"mexit", 0,
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"org", 0,
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"processor", 0,
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"rend", 0,
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"repeat", LEVEL_IN,
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"repend", LEVEL_OUT,
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"rorg", 0,
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"seg", 0,
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"set", DONT_RELOCATE_LABEL,
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"subroutine", DONT_RELOCATE_LABEL,
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"trace", 0,
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"word", 0,
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NULL, 0,
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};
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/*
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** Comparison without case
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*/
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int memcmpcase(char *p1, char *p2, int size)
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{
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while (size--) {
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if (tolower(*p1) != tolower(*p2))
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return 1;
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p1++;
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p2++;
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}
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return 0;
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}
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/*
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** Check for opcode or directive
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*/
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int check_opcode(char *p1, char *p2)
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{
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int c;
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int length;
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for (c = 0; directives_dasm[c].directive != NULL; c++) {
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length = strlen(directives_dasm[c].directive);
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if ((*p1 == '.' && length == p2 - p1 - 1 && memcmpcase(p1 + 1, directives_dasm[c].directive, p2 - p1 - 1) == 0) || (length == p2 - p1 && memcmpcase(p1, directives_dasm[c].directive, p2 - p1) == 0)) {
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return c + 1;
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}
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}
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for (c = 0; mnemonics_6502[c] != NULL; c++) {
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length = strlen(mnemonics_6502[c]);
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if (length == p2 - p1 && memcmpcase(p1, mnemonics_6502[c], p2 - p1) == 0)
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return -(c + 1);
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}
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return 0;
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}
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/*
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** Request space in line
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*/
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void request_space(FILE *output, int *current, int new, int force)
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{
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/*
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** If already exceeded space...
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*/
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if (*current >= new) {
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if (force)
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fputc(' ', output);
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(*current)++;
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return;
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}
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/*
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** Advance one step at a time
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*/
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while (1) {
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if (tabs == 0) {
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fprintf(output, "%*s", new - *current, "");
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*current = new;
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} else {
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fputc('\t', output);
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*current = (*current + tabs) / tabs * tabs;
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}
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if (*current >= new)
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return;
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}
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}
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/*
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** Main program
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*/
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int main(int argc, char *argv[])
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{
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int c;
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int style;
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int processor;
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int start_mnemonic;
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int start_operand;
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int start_comment;
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int align_comment;
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int nesting_space;
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int labels_own_line;
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FILE *input;
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FILE *output;
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int allocation;
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char *data;
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char *p;
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char *p1;
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char *p2;
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int current_column;
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int request;
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int current_level;
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int prev_comment_original_location;
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int prev_comment_final_location;
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int flags;
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/*
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** Show usage if less than 3 arguments (program name counts as one)
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*/
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if (argc < 3) {
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fprintf(stderr, "\n");
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fprintf(stderr, "Pretty6502 " VERSION " by Oscar Toledo G. http://nanochess.org/\n");
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fprintf(stderr, "\n");
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fprintf(stderr, "Usage:\n");
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fprintf(stderr, " pretty6502 [args] input.asm output.asm\n");
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fprintf(stderr, "\n");
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fprintf(stderr, "DON'T USE SAME OUTPUT FILE AS INPUT, though it's possible,\n");
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fprintf(stderr, "you can DAMAGE YOUR SOURCE if this program has bugs.\n");
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fprintf(stderr, "\n");
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fprintf(stderr, "Arguments:\n");
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fprintf(stderr, " -s0 Code in four columns (default)\n");
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fprintf(stderr, " label: mnemonic operand comment\n");
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fprintf(stderr, " -s1 Code in three columns\n");
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fprintf(stderr, " label: mnemonic+operand comment\n");
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fprintf(stderr, " -p0 Processor unknown\n");
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fprintf(stderr, " -p1 Processor 6502 + DASM syntax (default)\n");
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fprintf(stderr, " -m8 Start of mnemonic column (default)\n");
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fprintf(stderr, " -o16 Start of operand column (default)\n");
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fprintf(stderr, " -c32 Start of comment column (default)\n");
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fprintf(stderr, " -t8 Use tabs of size 8 to reach column\n");
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fprintf(stderr, " -t0 Use spaces to align (default)\n");
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fprintf(stderr, " -a0 Align comments to nearest column\n");
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fprintf(stderr, " -a1 Comments at line start are aligned\n");
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fprintf(stderr, " to mnemonic (default)\n");
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fprintf(stderr, " -n4 Nesting spacing (can be any number\n");
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fprintf(stderr, " of spaces or multiple of tab size)\n");
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fprintf(stderr, " -l Puts labels in its own line\n");
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fprintf(stderr, "\n");
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fprintf(stderr, "Assumes all your labels are at start of line and there is space\n");
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fprintf(stderr, "before mnemonic.\n");
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fprintf(stderr, "\n");
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fprintf(stderr, "Accepts any assembler file where ; means comment\n");
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fprintf(stderr, "[label] mnemonic [operand] ; comment\n");
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exit(1);
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}
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/*
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** Default settings
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*/
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style = 0;
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processor = 1;
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start_mnemonic = 8;
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start_operand = 16;
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start_comment = 32;
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tabs = 0;
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align_comment = 1;
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nesting_space = 4;
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labels_own_line = 0;
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/*
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** Process arguments
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*/
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c = 1;
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while (c < argc - 2) {
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if (argv[c][0] != '-') {
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fprintf(stderr, "Bad argument\n");
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exit(1);
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}
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switch (argv[c][1]) {
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case 's': /* Style */
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style = atoi(&argv[c][2]);
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if (style != 0 && style != 1) {
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fprintf(stderr, "Bad style code: %d\n", style);
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exit(1);
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}
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break;
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case 'p': /* Processor */
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processor = atoi(&argv[c][2]);
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if (processor < 0 || processor > 1) {
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fprintf(stderr, "Bad processor code: %d\n", processor);
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exit(1);
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}
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break;
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case 'm': /* Mnemonic start */
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start_mnemonic = atoi(&argv[c][2]);
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break;
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case 'o': /* Operand start */
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start_operand = atoi(&argv[c][2]);
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break;
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case 'c': /* Comment start */
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start_comment = atoi(&argv[c][2]);
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break;
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case 't': /* Tab size */
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tabs = atoi(&argv[c][2]);
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break;
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case 'a': /* Comment alignment */
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align_comment = atoi(&argv[c][2]);
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if (align_comment != 0 && align_comment != 1) {
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fprintf(stderr, "Bad comment alignment: %d\n", align_comment);
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exit(1);
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}
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break;
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case 'n': /* Nesting space */
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nesting_space = atoi(&argv[c][2]);
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break;
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case 'l': /* Labels in own line */
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labels_own_line = 1;
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break;
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default: /* Other */
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fprintf(stderr, "Unknown argument: %c\n", argv[c][1]);
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exit(1);
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}
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c++;
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}
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/*
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** Validate constraints
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*/
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if (style == 1) {
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if (start_mnemonic > start_comment) {
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fprintf(stderr, "Operand error: -m%d > -c%d\n", start_mnemonic, start_comment);
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exit(1);
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}
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start_operand = start_mnemonic;
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} else if (style == 0) {
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|
if (start_mnemonic > start_operand) {
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fprintf(stderr, "Operand error: -m%d > -o%d\n", start_mnemonic, start_operand);
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exit(1);
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}
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|
if (start_operand > start_comment) {
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fprintf(stderr, "Operand error: -o%d > -c%d\n", start_operand, start_comment);
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exit(1);
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}
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|
}
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|
if (tabs > 0) {
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|
if (start_mnemonic % tabs) {
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fprintf(stderr, "Operand error: -m%d isn't a multiple of %d\n", start_mnemonic, tabs);
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exit(1);
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|
}
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|
if (start_operand % tabs) {
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|
fprintf(stderr, "Operand error: -m%d isn't a multiple of %d\n", start_operand, tabs);
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|
exit(1);
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|
}
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|
if (start_comment % tabs) {
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|
fprintf(stderr, "Operand error: -m%d isn't a multiple of %d\n", start_comment, tabs);
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|
exit(1);
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|
}
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|
if (nesting_space % tabs) {
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|
fprintf(stderr, "Operand error: -n%d isn't a multiple of %d\n", nesting_space, tabs);
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|
exit(1);
|
||||||
|
}
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||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
** Open input file, measure it and read it into buffer
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||||||
|
*/
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||||||
|
input = fopen(argv[c], "rb");
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||||||
|
if (input == NULL) {
|
||||||
|
fprintf(stderr, "Unable to open input file: %s\n", argv[c]);
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||||||
|
exit(1);
|
||||||
|
}
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|
fprintf(stderr, "Processing %s...\n", argv[c]);
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|
fseek(input, 0, SEEK_END);
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|
allocation = ftell(input);
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||||||
|
data = malloc(allocation + sizeof(char));
|
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|
if (data == NULL) {
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||||||
|
fprintf(stderr, "Unable to allocate memory\n");
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||||||
|
fclose(input);
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|
exit(1);
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||||||
|
}
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||||||
|
fseek(input, 0, SEEK_SET);
|
||||||
|
if (fread(data, sizeof(char), allocation, input) != allocation) {
|
||||||
|
fprintf(stderr, "Something went wrong reading the input file\n");
|
||||||
|
fclose(input);
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||||||
|
free(data);
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
fclose(input);
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||||||
|
|
||||||
|
/*
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||||||
|
** Ease processing of input file
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||||||
|
*/
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||||||
|
request = 0;
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||||||
|
p1 = data;
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||||||
|
p2 = data;
|
||||||
|
while (p1 < data + allocation) {
|
||||||
|
if (*p1 == '\r') { /* Ignore \r characters */
|
||||||
|
p1++;
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
if (*p1 == '\n') {
|
||||||
|
p1++;
|
||||||
|
*p2++ = '\0'; /* Break line */
|
||||||
|
request = 1;
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
*p2++ = *p1++;
|
||||||
|
request = 0;
|
||||||
|
}
|
||||||
|
if (request == 0)
|
||||||
|
*p2++ = '\0'; /* Force line break */
|
||||||
|
allocation = p2 - data;
|
||||||
|
|
||||||
|
/*
|
||||||
|
** Now generate output file
|
||||||
|
*/
|
||||||
|
c++;
|
||||||
|
output = fopen(argv[c], "w");
|
||||||
|
if (output == NULL) {
|
||||||
|
fprintf(stderr, "Unable to open output file: %s\n", argv[c]);
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
prev_comment_original_location = 0;
|
||||||
|
prev_comment_final_location = 0;
|
||||||
|
current_level = 0;
|
||||||
|
p = data;
|
||||||
|
while (p < data + allocation) {
|
||||||
|
current_column = 0;
|
||||||
|
p1 = p;
|
||||||
|
p2 = p1;
|
||||||
|
while (*p2 && !isspace(*p2) && *p2 != ';')
|
||||||
|
p2++;
|
||||||
|
if (p2 - p1) { /* Label */
|
||||||
|
fwrite(p1, sizeof(char), p2 - p1, output);
|
||||||
|
current_column = p2 - p1;
|
||||||
|
p1 = p2;
|
||||||
|
} else {
|
||||||
|
current_column = 0;
|
||||||
|
}
|
||||||
|
while (*p1 && isspace(*p1))
|
||||||
|
p1++;
|
||||||
|
flags = 0;
|
||||||
|
if (*p1 && *p1 != ';') { /* Mnemonic */
|
||||||
|
p2 = p1;
|
||||||
|
while (*p2 && !isspace(*p2) && *p2 != ';')
|
||||||
|
p2++;
|
||||||
|
if (processor == 1) {
|
||||||
|
c = check_opcode(p1, p2);
|
||||||
|
if (c == 0) {
|
||||||
|
request = start_mnemonic;
|
||||||
|
} else if (c < 0) {
|
||||||
|
request = start_mnemonic;
|
||||||
|
} else {
|
||||||
|
flags = directives_dasm[c - 1].flags;
|
||||||
|
if (flags & DONT_RELOCATE_LABEL)
|
||||||
|
request = start_operand;
|
||||||
|
else
|
||||||
|
request = start_mnemonic;
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
request = start_mnemonic;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
** Move label to own line
|
||||||
|
*/
|
||||||
|
if (current_column != 0 && labels_own_line != 0 && (flags & DONT_RELOCATE_LABEL) == 0) {
|
||||||
|
fputc('\n', output);
|
||||||
|
current_column = 0;
|
||||||
|
}
|
||||||
|
if (flags & LEVEL_OUT) {
|
||||||
|
if (current_level > 0)
|
||||||
|
current_level--;
|
||||||
|
}
|
||||||
|
request += current_level * nesting_space;
|
||||||
|
if (flags & LEVEL_MINUS)
|
||||||
|
request -= nesting_space;
|
||||||
|
request_space(output, ¤t_column, request, 1);
|
||||||
|
fwrite(p1, sizeof(char), p2 - p1, output);
|
||||||
|
current_column += p2 - p1;
|
||||||
|
p1 = p2;
|
||||||
|
while (*p1 && isspace(*p1))
|
||||||
|
p1++;
|
||||||
|
if (*p1 && *p1 != ';') { /* Operand */
|
||||||
|
request = start_operand;
|
||||||
|
request += current_level * nesting_space;
|
||||||
|
request_space(output, ¤t_column, request, 1);
|
||||||
|
p2 = p1;
|
||||||
|
while (*p2 && *p2 != ';') {
|
||||||
|
if (*p2 == '"') {
|
||||||
|
p2++;
|
||||||
|
while (*p2 && *p2 != '"')
|
||||||
|
p2++;
|
||||||
|
p2++;
|
||||||
|
} else if (*p2 == '\'') {
|
||||||
|
p2++;
|
||||||
|
while (*p2 && *p2 != '"')
|
||||||
|
p2++;
|
||||||
|
p2++;
|
||||||
|
} else {
|
||||||
|
p2++;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
while (p2 > p1 && isspace(*(p2 - 1)))
|
||||||
|
p2--;
|
||||||
|
fwrite(p1, sizeof(char), p2 - p1, output);
|
||||||
|
current_column += p2 - p1;
|
||||||
|
p1 = p2;
|
||||||
|
while (*p1 && isspace(*p1))
|
||||||
|
p1++;
|
||||||
|
}
|
||||||
|
if (flags & LEVEL_IN) {
|
||||||
|
current_level++;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (*p1 == ';') { /* Comment */
|
||||||
|
|
||||||
|
/*
|
||||||
|
** Try to keep comments horizontally aligned (only works
|
||||||
|
** if spaces were used in source file)
|
||||||
|
*/
|
||||||
|
p2 = p1;
|
||||||
|
while (p2 - 1 >= p && isspace(*(p2 - 1)))
|
||||||
|
p2--;
|
||||||
|
if (p2 == p && p1 - p == prev_comment_original_location) {
|
||||||
|
request = prev_comment_final_location;
|
||||||
|
} else {
|
||||||
|
prev_comment_original_location = p1 - p;
|
||||||
|
if (current_column == 0)
|
||||||
|
request = 0;
|
||||||
|
else if (current_column < start_mnemonic)
|
||||||
|
request = start_mnemonic;
|
||||||
|
else
|
||||||
|
request = start_comment;
|
||||||
|
if (current_column == 0 && align_comment == 1)
|
||||||
|
request = start_mnemonic;
|
||||||
|
prev_comment_final_location = request;
|
||||||
|
}
|
||||||
|
request_space(output, ¤t_column, request, 0);
|
||||||
|
p2 = p1;
|
||||||
|
while (*p2)
|
||||||
|
p2++;
|
||||||
|
while (p2 > p1 && isspace(*(p2 - 1)))
|
||||||
|
p2--;
|
||||||
|
fwrite(p1, sizeof(char), p2 - p1, output);
|
||||||
|
fputc('\n', output);
|
||||||
|
current_column += p2 - p1;
|
||||||
|
while (*p++) ;
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
fputc('\n', output);
|
||||||
|
while (*p++) ;
|
||||||
|
}
|
||||||
|
fclose(output);
|
||||||
|
free(data);
|
||||||
|
exit(0);
|
||||||
|
}
|
||||||
Loading…
Reference in New Issue
Block a user