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    return ch == ' ' || ch == '\t' || ch == '\v' || ch == '\f' || ch == '\r';
}
static inline int isid(int c) {
    return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_';
}
static inline int isnum(int c) {
    return c >= '0' && c <= '9';
}
static inline int isoct(int c) {
    return c >= '0' && c <= '7';
}
static inline int toup(int c) {
    return (c >= 'a' && c <= 'z') ? c - 'a' + 'A' : c;
}

/* ------------ tccgen.c ------------ */

#define SYM_POOL_NB (8192 / sizeof(Sym))
ST_DATA Sym *sym_free_first;
ST_DATA void **sym_pools;
ST_DATA int nb_sym_pools;

ST_DATA Sym *global_stack;
ST_DATA Sym *local_stack;
ST_DATA Sym *local_label_stack;
ST_DATA Sym *global_label_stack;
ST_DATA Sym *define_stack;
ST_DATA CType char_pointer_type, func_old_type, int_type, size_type;
ST_DATA SValue __vstack[1+/*to make bcheck happy*/ VSTACK_SIZE], *vtop, *pvtop;
#define vstack  (__vstack + 1)
ST_DATA int rsym, anon_sym, ind, loc;

ST_DATA int const_wanted; /* true if constant wanted */
ST_DATA int nocode_wanted; /* true if no code generation wanted for an expression */
ST_DATA int global_expr;  /* true if compound literals must be allocated globally (used during initializers parsing */
ST_DATA CType func_vt; /* current function return type (used by return instruction) */
ST_DATA int func_var; /* true if current function is variadic */
ST_DATA int func_vc;
ST_DATA int last_line_num, last_ind, func_ind; /* debug last line number and pc */
ST_DATA const char *funcname;

ST_FUNC void tccgen_start(TCCState *s1);
ST_FUNC void tccgen_end(TCCState *s1);
ST_FUNC void free_inline_functions(TCCState *s);
ST_FUNC void check_vstack(void);

ST_INLN int is_float(int t);
ST_FUNC int ieee_finite(double d);
ST_FUNC void test_lvalue(void);
ST_FUNC void swap(int *p, int *q);
ST_FUNC void vpushi(int v);
ST_FUNC Sym *external_global_sym(int v, CType *type, int r);
ST_FUNC void vset(CType *type, int r, int v);
ST_FUNC void vswap(void);
ST_FUNC void vpush_global_sym(CType *type, int v);
ST_FUNC void vrote(SValue *e, int n);
ST_FUNC void vrott(int n);
ST_FUNC void vrotb(int n);
#ifdef TCC_TARGET_ARM
ST_FUNC int get_reg_ex(int rc, int rc2);
ST_FUNC void lexpand_nr(void);
#endif
ST_FUNC void vpushv(SValue *v);
ST_FUNC void save_reg(int r);
ST_FUNC void save_reg_upstack(int r, int n);
ST_FUNC int get_reg(int rc);
ST_FUNC void save_regs(int n);
ST_FUNC void gaddrof(void);
ST_FUNC int gv(int rc);
ST_FUNC void gv2(int rc1, int rc2);
ST_FUNC void vpop(void);
ST_FUNC void gen_op(int op);
ST_FUNC int type_size(CType *type, int *a);
ST_FUNC void mk_pointer(CType *type);
ST_FUNC void vstore(void);
ST_FUNC void inc(int post, int c);
ST_FUNC void parse_asm_str(CString *astr);
ST_FUNC int lvalue_type(int t);
ST_FUNC void indir(void);
ST_FUNC void unary(void);
ST_FUNC void expr_prod(void);
ST_FUNC void expr_sum(void);
ST_FUNC void gexpr(void);
ST_FUNC int expr_const(void);
ST_FUNC void decl(int l);
#if defined CONFIG_TCC_BCHECK || defined TCC_TARGET_C67
ST_FUNC Sym *get_sym_ref(CType *type, Section *sec, unsigned long offset, unsigned long size);
#endif
#if defined TCC_TARGET_X86_64 && !defined TCC_TARGET_PE
ST_FUNC int classify_x86_64_va_arg(CType *ty);
#endif

/* ------------ tccelf.c ------------ */

#define TCC_OUTPUT_FORMAT_ELF    0 /* default output format: ELF */
#define TCC_OUTPUT_FORMAT_BINARY 1 /* binary image output */
#define TCC_OUTPUT_FORMAT_COFF   2 /* COFF */

#define ARMAG  "!<arch>\012"    /* For COFF and a.out archives */

typedef struct {
    unsigned int n_strx;         /* index into string table of name */
    unsigned char n_type;         /* type of symbol */
    unsigned char n_other;        /* misc info (usually empty) */
    unsigned short n_desc;        /* description field */
    unsigned int n_value;        /* value of symbol */
} Stab_Sym;

ST_DATA Section *text_section, *data_section, *bss_section; /* predefined sections */
ST_DATA Section *cur_text_section; /* current section where function code is generated */
#ifdef CONFIG_TCC_ASM
ST_DATA Section *last_text_section; /* to handle .previous asm directive */
#endif
#ifdef CONFIG_TCC_BCHECK
/* bound check related sections */
ST_DATA Section *bounds_section; /* contains global data bound description */
ST_DATA Section *lbounds_section; /* contains local data bound description */
ST_FUNC void tccelf_bounds_new(TCCState *s);
#endif
/* symbol sections */
ST_DATA Section *symtab_section, *strtab_section;