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src/libtcc.c  view on Meta::CPAN

/* add a new relocation entry to symbol 'sym' in section 's' */
ST_FUNC void greloc(Section *s, Sym *sym, unsigned long offset, int type)
{
    int c = 0;
    if (sym) {
        if (0 == sym->c)
            put_extern_sym(sym, NULL, 0, 0);
        c = sym->c;
    }
    /* now we can add ELF relocation info */
    put_elf_reloc(symtab_section, s, offset, type, c);
}

/********************************************************/

static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
{
    int len;
    len = strlen(buf);
    vsnprintf(buf + len, buf_size - len, fmt, ap);
}

static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
{
    va_list ap;
    va_start(ap, fmt);
    strcat_vprintf(buf, buf_size, fmt, ap);
    va_end(ap);
}

static void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
{
    char buf[2048];
    BufferedFile **pf, *f;
    
    buf[0] = '\0';
    /* use upper file if inline ":asm:" or token ":paste:" */
    for (f = file; f && f->filename[0] == ':'; f = f->prev)
     ;
    if (f) {
        for(pf = s1->include_stack; pf < s1->include_stack_ptr; pf++)
            strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
                (*pf)->filename, (*pf)->line_num);
        if (f->line_num > 0) {
            strcat_printf(buf, sizeof(buf), "%s:%d: ",
                f->filename, f->line_num);
        } else {
            strcat_printf(buf, sizeof(buf), "%s: ",
                f->filename);
        }
    } else {
        strcat_printf(buf, sizeof(buf), "tcc: ");
    }
    if (is_warning)
        strcat_printf(buf, sizeof(buf), "warning: ");
    else
        strcat_printf(buf, sizeof(buf), "error: ");
    strcat_vprintf(buf, sizeof(buf), fmt, ap);

    if (!s1->error_func) {
        /* default case: stderr */
        fprintf(stderr, "%s\n", buf);
    } else {
        s1->error_func(s1->error_opaque, buf);
    }
    if (!is_warning || s1->warn_error)
        s1->nb_errors++;
}

LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque,
                        void (*error_func)(void *opaque, const char *msg))
{
    s->error_opaque = error_opaque;
    s->error_func = error_func;
}

/* error without aborting current compilation */
PUB_FUNC void tcc_error_noabort(const char *fmt, ...)
{
    TCCState *s1 = tcc_state;
    va_list ap;

    va_start(ap, fmt);
    error1(s1, 0, fmt, ap);
    va_end(ap);
}

PUB_FUNC void tcc_error(const char *fmt, ...)
{
    TCCState *s1 = tcc_state;
    va_list ap;

    va_start(ap, fmt);
    error1(s1, 0, fmt, ap);
    va_end(ap);
    /* better than nothing: in some cases, we accept to handle errors */
    if (s1->error_set_jmp_enabled) {
        longjmp(s1->error_jmp_buf, 1);
    } else {
        /* XXX: eliminate this someday */
        exit(1);
    }
}

PUB_FUNC void tcc_warning(const char *fmt, ...)
{
    TCCState *s1 = tcc_state;
    va_list ap;

    if (s1->warn_none)
        return;

    va_start(ap, fmt);
    error1(s1, 1, fmt, ap);
    va_end(ap);
}

/********************************************************/
/* I/O layer */

ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
{