Alien-TinyCC

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src/libtcc.c  view on Meta::CPAN

    pstrcpy(bf->filename, sizeof(bf->filename), filename);
#ifdef _WIN32
    normalize_slashes(bf->filename);
#endif
    bf->line_num = 1;
    bf->ifndef_macro = 0;
    bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
    bf->fd = -1;
    bf->prev = file;
    file = bf;
}

ST_FUNC void tcc_close(void)
{
    BufferedFile *bf = file;
    if (bf->fd > 0) {
        close(bf->fd);
        total_lines += bf->line_num;
    }
    file = bf->prev;
    tcc_free(bf);
}

ST_FUNC int tcc_open(TCCState *s1, const char *filename)
{
    int fd;
    if (strcmp(filename, "-") == 0)
        fd = 0, filename = "stdin";
    else
        fd = open(filename, O_RDONLY | O_BINARY);
    if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
        printf("%s %*s%s\n", fd < 0 ? "nf":"->",
               (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
    if (fd < 0)
        return -1;

    tcc_open_bf(s1, filename, 0);
    file->fd = fd;
    return fd;
}

/* compile the C file opened in 'file'. Return non zero if errors. */
static int tcc_compile(TCCState *s1)
{
    Sym *define_start;
    SValue *pvtop;
    char buf[512];
    volatile int section_sym;

#ifdef INC_DEBUG
    printf("%s: **** new file\n", file->filename);
#endif
    preprocess_init(s1);

    cur_text_section = NULL;
    funcname = "";
    anon_sym = SYM_FIRST_ANOM; 

    /* file info: full path + filename */
    section_sym = 0; /* avoid warning */
    if (s1->do_debug) {
        section_sym = put_elf_sym(symtab_section, 0, 0, 
                                  ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0, 
                                  text_section->sh_num, NULL);
        getcwd(buf, sizeof(buf));
#ifdef _WIN32
        normalize_slashes(buf);
#endif
        pstrcat(buf, sizeof(buf), "/");
        put_stabs_r(buf, N_SO, 0, 0, 
                    text_section->data_offset, text_section, section_sym);
        put_stabs_r(file->filename, N_SO, 0, 0, 
                    text_section->data_offset, text_section, section_sym);
    }
    /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
       symbols can be safely used */
    put_elf_sym(symtab_section, 0, 0, 
                ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0, 
                SHN_ABS, file->filename);

    /* define some often used types */
    int_type.t = VT_INT;

    char_pointer_type.t = VT_BYTE;
    mk_pointer(&char_pointer_type);

#if PTR_SIZE == 4
    size_type.t = VT_INT;
#else
    size_type.t = VT_LLONG;
#endif

    func_old_type.t = VT_FUNC;
    func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
#ifdef TCC_TARGET_ARM
    arm_init_types();
#endif

#if 0
    /* define 'void *alloca(unsigned int)' builtin function */
    {
        Sym *s1;

        p = anon_sym++;
        sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
        s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
        s1->next = NULL;
        sym->next = s1;
        sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
    }
#endif

    define_start = define_stack;
    nocode_wanted = 1;

    if (setjmp(s1->error_jmp_buf) == 0) {
        s1->nb_errors = 0;
        s1->error_set_jmp_enabled = 1;

        ch = file->buf_ptr[0];
        tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
        parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM;
        pvtop = vtop;
        next();
        decl(VT_CONST);
        if (tok != TOK_EOF)
            expect("declaration");
        if (pvtop != vtop)
            tcc_warning("internal compiler error: vstack leak? (%d)", vtop - pvtop);

        /* end of translation unit info */
        if (s1->do_debug) {
            put_stabs_r(NULL, N_SO, 0, 0, 
                        text_section->data_offset, text_section, section_sym);
        }
    }

    s1->error_set_jmp_enabled = 0;

    /* reset define stack, but leave -Dsymbols (may be incorrect if
       they are undefined) */
    free_defines(define_start); 

    gen_inline_functions();

    sym_pop(&global_stack, NULL);
    sym_pop(&local_stack, NULL);

    return s1->nb_errors != 0 ? -1 : 0;
}

LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
{
    int len, ret;
    len = strlen(str);

    tcc_open_bf(s, "<string>", len);
    memcpy(file->buffer, str, len);
    ret = tcc_compile(s);
    tcc_close();
    return ret;
}

/* define a preprocessor symbol. A value can also be provided with the '=' operator */
LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
{
    int len1, len2;
    /* default value */
    if (!value)
        value = "1";
    len1 = strlen(sym);
    len2 = strlen(value);

    /* init file structure */
    tcc_open_bf(s1, "<define>", len1 + len2 + 1);
    memcpy(file->buffer, sym, len1);
    file->buffer[len1] = ' ';
    memcpy(file->buffer + len1 + 1, value, len2);

    /* parse with define parser */
    ch = file->buf_ptr[0];
    next_nomacro();
    parse_define();

    tcc_close();
}

/* undefine a preprocessor symbol */
LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
{
    TokenSym *ts;
    Sym *s;

src/libtcc.c  view on Meta::CPAN

{
#ifdef TCC_TARGET_PE
    const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
    const char **pp = s->static_link ? libs + 4 : libs;
#else
    const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
    const char **pp = s->static_link ? libs + 1 : libs;
#endif
    while (*pp) {
        if (0 == tcc_add_library_internal(s, *pp,
            libraryname, 0, s->library_paths, s->nb_library_paths))
            return 0;
        ++pp;
    }
    return -1;
}

LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
{
#ifdef TCC_TARGET_PE
    /* On x86_64 'val' might not be reachable with a 32bit offset.
       So it is handled here as if it were in a DLL. */
    pe_putimport(s, 0, name, (uintptr_t)val);
#else
    /* XXX: Same problem on linux but currently "solved" elsewhere
       via the rather dirty 'runtime_plt_and_got' hack. */
    add_elf_sym(symtab_section, (uintptr_t)val, 0,
        ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
        SHN_ABS, name);
#endif
    return 0;
}

LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
{
    s->output_type = output_type;

    if (!s->nostdinc) {
        /* default include paths */
        /* -isystem paths have already been handled */
        tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
    }

    /* if bound checking, then add corresponding sections */
#ifdef CONFIG_TCC_BCHECK
    if (s->do_bounds_check) {
        /* define symbol */
        tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
        /* create bounds sections */
        bounds_section = new_section(s, ".bounds", 
                                     SHT_PROGBITS, SHF_ALLOC);
        lbounds_section = new_section(s, ".lbounds", 
                                      SHT_PROGBITS, SHF_ALLOC);
    }
#endif

    if (s->char_is_unsigned) {
        tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
    }

    /* add debug sections */
    if (s->do_debug) {
        /* stab symbols */
        stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
        stab_section->sh_entsize = sizeof(Stab_Sym);
        stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
        put_elf_str(stabstr_section, "");
        stab_section->link = stabstr_section;
        /* put first entry */
        put_stabs("", 0, 0, 0, 0);
    }

    tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
#ifdef TCC_TARGET_PE
# ifdef _WIN32
    tcc_add_systemdir(s);
# endif
#else
    /* add libc crt1/crti objects */
    if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
        !s->nostdlib) {
        if (output_type != TCC_OUTPUT_DLL)
            tcc_add_crt(s, "crt1.o");
        tcc_add_crt(s, "crti.o");
    }
#endif
    return 0;
}

LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
{
    tcc_free(s->tcc_lib_path);
    s->tcc_lib_path = tcc_strdup(path);
}

#define WD_ALL    0x0001 /* warning is activated when using -Wall */
#define FD_INVERT 0x0002 /* invert value before storing */

typedef struct FlagDef {
    uint16_t offset;
    uint16_t flags;
    const char *name;
} FlagDef;

static const FlagDef warning_defs[] = {
    { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
    { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
    { offsetof(TCCState, warn_error), 0, "error" },
    { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
      "implicit-function-declaration" },
};

ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
                    const char *name, int value)
{
    int i;
    const FlagDef *p;
    const char *r;

    r = name;
    if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
        r += 3;

src/libtcc.c  view on Meta::CPAN

        /* find option in table */
        for(popt = tcc_options; ; ++popt) {
            const char *p1 = popt->name;
            const char *r1 = r + 1;
            if (p1 == NULL)
                tcc_error("invalid option -- '%s'", r);
            if (!strstart(p1, &r1))
                continue;
            optarg = r1;
            if (popt->flags & TCC_OPTION_HAS_ARG) {
                if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
                    if (optind >= argc)
                        tcc_error("argument to '%s' is missing", r);
                    optarg = argv[optind++];
                }
            } else if (*r1 != '\0')
                continue;
            break;
        }

        switch(popt->index) {
        case TCC_OPTION_HELP:
            return 0;
        case TCC_OPTION_I:
            if (tcc_add_include_path(s, optarg) < 0)
                tcc_error("too many include paths");
            break;
        case TCC_OPTION_D:
            parse_option_D(s, optarg);
            break;
        case TCC_OPTION_U:
            tcc_undefine_symbol(s, optarg);
            break;
        case TCC_OPTION_L:
            tcc_add_library_path(s, optarg);
            break;
        case TCC_OPTION_B:
            /* set tcc utilities path (mainly for tcc development) */
            tcc_set_lib_path(s, optarg);
            break;
        case TCC_OPTION_l:
            dynarray_add((void ***)&s->files, &s->nb_files, tcc_strdup(r));
            s->nb_libraries++;
            break;
        case TCC_OPTION_pthread:
            parse_option_D(s, "_REENTRANT");
            pthread = 1;
            break;
        case TCC_OPTION_bench:
            s->do_bench = 1;
            break;
#ifdef CONFIG_TCC_BACKTRACE
        case TCC_OPTION_bt:
            tcc_set_num_callers(atoi(optarg));
            break;
#endif
#ifdef CONFIG_TCC_BCHECK
        case TCC_OPTION_b:
            s->do_bounds_check = 1;
            s->do_debug = 1;
            break;
#endif
        case TCC_OPTION_g:
            s->do_debug = 1;
            break;
        case TCC_OPTION_c:
            s->output_type = TCC_OUTPUT_OBJ;
            break;
        case TCC_OPTION_static:
            s->static_link = 1;
            break;
        case TCC_OPTION_shared:
            s->output_type = TCC_OUTPUT_DLL;
            break;
        case TCC_OPTION_soname:
            s->soname = tcc_strdup(optarg);
            break;
        case TCC_OPTION_m:
            s->option_m = tcc_strdup(optarg);
            break;
        case TCC_OPTION_o:
            s->outfile = tcc_strdup(optarg);
            break;
        case TCC_OPTION_r:
            /* generate a .o merging several output files */
            s->option_r = 1;
            s->output_type = TCC_OUTPUT_OBJ;
            break;
        case TCC_OPTION_isystem:
            tcc_add_sysinclude_path(s, optarg);
            break;
        case TCC_OPTION_nostdinc:
            s->nostdinc = 1;
            break;
        case TCC_OPTION_nostdlib:
            s->nostdlib = 1;
            break;
        case TCC_OPTION_print_search_dirs:
            s->print_search_dirs = 1;
            break;
        case TCC_OPTION_run:
            s->output_type = TCC_OUTPUT_MEMORY;
            tcc_set_options(s, optarg);
            run = 1;
            break;
        case TCC_OPTION_norunsrc:
            norunsrc = 1;
            break;
        case TCC_OPTION_v:
            do ++s->verbose; while (*optarg++ == 'v');
            break;
        case TCC_OPTION_f:
            if (tcc_set_flag(s, optarg, 1) < 0 && s->warn_unsupported)
                goto unsupported_option;
            break;
        case TCC_OPTION_W:
            if (tcc_set_warning(s, optarg, 1) < 0 && 
                s->warn_unsupported)
                goto unsupported_option;
            break;
        case TCC_OPTION_w:
            s->warn_none = 1;
            break;
        case TCC_OPTION_rdynamic: