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modarray.c

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  • misc.h 4.42 KiB
    // a mini library of useful types and functions
    
    #ifndef _INCLUDED_MINILIB_H
    #define _INCLUDED_MINILIB_H
    
    /** types *******************************************************/
    
    #include <stdbool.h>
    
    typedef unsigned char byte;
    typedef unsigned int uint;
    
    /** generic ops *************************************************/
    
    #ifndef MIN
    #define MIN(x, y) ((x) < (y) ? (x) : (y))
    #endif
    #ifndef MAX
    #define MAX(x, y) ((x) > (y) ? (x) : (y))
    #endif
    
    /** memomry allocation ******************************************/
    
    // TODO make a lazy m_renew that can increase by a smaller amount than requested (but by at least 1 more element)
    
    #define m_new(type, num) ((type*)(m_malloc(sizeof(type) * (num))))
    #define m_new0(type, num) ((type*)(m_malloc0(sizeof(type) * (num))))
    #define m_new_obj(type) (m_new(type, 1))
    #define m_new_obj_var(obj_type, var_type, var_num) ((obj_type*)m_malloc(sizeof(obj_type) + sizeof(var_type) * (var_num)))
    #if MICROPY_ENABLE_FINALISER
    #define m_new_obj_with_finaliser(type) ((type*)(m_malloc_with_finaliser(sizeof(type))))
    #else
    #define m_new_obj_with_finaliser(type) m_new_obj(type)
    #endif
    #define m_renew(type, ptr, old_num, new_num) ((type*)(m_realloc((ptr), sizeof(type) * (old_num), sizeof(type) * (new_num))))
    #define m_del(type, ptr, num) m_free(ptr, sizeof(type) * (num))
    #define m_del_obj(type, ptr) (m_del(type, ptr, 1))
    #define m_del_var(obj_type, var_type, var_num, ptr) (m_free(ptr, sizeof(obj_type) + sizeof(var_type) * (var_num)))
    
    void *m_malloc(int num_bytes);
    void *m_malloc_maybe(int num_bytes);
    void *m_malloc_with_finaliser(int num_bytes);
    void *m_malloc0(int num_bytes);
    void *m_realloc(void *ptr, int old_num_bytes, int new_num_bytes);
    void m_free(void *ptr, int num_bytes);
    void *m_malloc_fail(int num_bytes);
    
    int m_get_total_bytes_allocated(void);
    int m_get_current_bytes_allocated(void);
    int m_get_peak_bytes_allocated(void);
    
    /** unichar / UTF-8 *********************************************/
    
    typedef int unichar; // TODO
    
    unichar utf8_get_char(const char *s);
    char *utf8_next_char(const char *s);
    
    bool unichar_isspace(unichar c);
    bool unichar_isalpha(unichar c);
    bool unichar_isprint(unichar c);
    bool unichar_isdigit(unichar c);
    bool unichar_isxdigit(unichar c);
    
    /** variable string *********************************************/
    
    typedef struct _vstr_t {
        uint alloc;
        uint len;
        char *buf;
        bool had_error : 1;
        bool fixed_buf : 1;
    } vstr_t;
    
    // convenience macro to declare a vstr with a fixed size buffer on the stack
    #define VSTR_FIXED(vstr, alloc) vstr_t vstr; char vstr##_buf[(alloc)]; vstr_init_fixed_buf(&vstr, (alloc), vstr##_buf);
    
    void vstr_init(vstr_t *vstr, int alloc);
    void vstr_init_fixed_buf(vstr_t *vstr, int alloc, char *buf);
    void vstr_clear(vstr_t *vstr);
    vstr_t *vstr_new(void);
    vstr_t *vstr_new_size(int alloc);
    void vstr_free(vstr_t *vstr);
    void vstr_reset(vstr_t *vstr);
    bool vstr_had_error(vstr_t *vstr);
    char *vstr_str(vstr_t *vstr);
    int vstr_len(vstr_t *vstr);
    void vstr_hint_size(vstr_t *vstr, int size);
    char *vstr_extend(vstr_t *vstr, int size);
    bool vstr_set_size(vstr_t *vstr, int size);
    bool vstr_shrink(vstr_t *vstr);
    char *vstr_add_len(vstr_t *vstr, int len);
    void vstr_add_byte(vstr_t *vstr, byte v);
    void vstr_add_char(vstr_t *vstr, unichar chr);
    void vstr_add_str(vstr_t *vstr, const char *str);
    void vstr_add_strn(vstr_t *vstr, const char *str, int len);
    //void vstr_add_le16(vstr_t *vstr, unsigned short v);
    //void vstr_add_le32(vstr_t *vstr, unsigned int v);
    void vstr_ins_byte(vstr_t *vstr, uint byte_pos, byte b);
    void vstr_ins_char(vstr_t *vstr, uint char_pos, unichar chr);
    void vstr_cut_head_bytes(vstr_t *vstr, uint bytes_to_cut);
    void vstr_cut_tail_bytes(vstr_t *vstr, uint bytes_to_cut);
    void vstr_cut_out_bytes(vstr_t *vstr, uint byte_pos, uint bytes_to_cut);
    void vstr_printf(vstr_t *vstr, const char *fmt, ...);
    
    /** non-dynamic size-bounded variable buffer/string *************/
    
    #define CHECKBUF(buf, max_size) char buf[max_size + 1]; uint buf##_len = max_size; char *buf##_p = buf;
    #define CHECKBUF_RESET(buf, max_size) buf##_len = max_size; buf##_p = buf;
    #define CHECKBUF_APPEND(buf, src, src_len) \
            { int l = MIN(src_len, buf##_len); \
            memcpy(buf##_p, src, l); \
            buf##_len -= l; \
            buf##_p += l; }
    #define CHECKBUF_APPEND_0(buf) { *buf##_p = 0; }
    #define CHECKBUF_LEN(buf) (buf##_p - buf)
    
    #ifdef va_start
    void vstr_vprintf(vstr_t *vstr, const char *fmt, va_list ap);
    #endif
    
    // Debugging helpers
    int DEBUG_printf(const char *fmt, ...);
    
    #endif // _INCLUDED_MINILIB_H