codekingpro/portable-devtools

1#ifndef Py_INTERNAL_BYTESOBJECT_H2#define Py_INTERNAL_BYTESOBJECT_H3#ifdef __cplusplus4extern "C" {5#endif6 7#ifndef Py_BUILD_CORE8#  error "this header requires Py_BUILD_CORE define"9#endif10 11extern PyObject* _PyBytes_FormatEx(12    const char *format,13    Py_ssize_t format_len,14    PyObject *args,15    int use_bytearray);16 17extern PyObject* _PyBytes_FromHex(18    PyObject *string,19    int use_bytearray);20 21// Helper for PyBytes_DecodeEscape that detects invalid escape chars.22// Export for test_peg_generator.23PyAPI_FUNC(PyObject*) _PyBytes_DecodeEscape2(const char *, Py_ssize_t,24                                             const char *,25                                             int *, const char **);26 27 28// Substring Search.29//30// Returns the index of the first occurrence of31// a substring ("needle") in a larger text ("haystack").32// If the needle is not found, return -1.33// If the needle is found, add offset to the index.34//35// Export for 'mmap' shared extension.36PyAPI_FUNC(Py_ssize_t)37_PyBytes_Find(const char *haystack, Py_ssize_t len_haystack,38              const char *needle, Py_ssize_t len_needle,39              Py_ssize_t offset);40 41// Same as above, but search right-to-left.42// Export for 'mmap' shared extension.43PyAPI_FUNC(Py_ssize_t)44_PyBytes_ReverseFind(const char *haystack, Py_ssize_t len_haystack,45                     const char *needle, Py_ssize_t len_needle,46                     Py_ssize_t offset);47 48 49// Helper function to implement the repeat and inplace repeat methods on a50// buffer.51//52// len_dest is assumed to be an integer multiple of len_src.53// If src equals dest, then assume the operation is inplace.54//55// This method repeately doubles the number of bytes copied to reduce56// the number of invocations of memcpy.57//58// Export for 'array' shared extension.59PyAPI_FUNC(void)60_PyBytes_Repeat(char* dest, Py_ssize_t len_dest,61    const char* src, Py_ssize_t len_src);62 63/* --- _PyBytesWriter ----------------------------------------------------- */64 65/* The _PyBytesWriter structure is big: it contains an embedded "stack buffer".66   A _PyBytesWriter variable must be declared at the end of variables in a67   function to optimize the memory allocation on the stack. */68typedef struct {69    /* bytes, bytearray or NULL (when the small buffer is used) */70    PyObject *buffer;71 72    /* Number of allocated size. */73    Py_ssize_t allocated;74 75    /* Minimum number of allocated bytes,76       incremented by _PyBytesWriter_Prepare() */77    Py_ssize_t min_size;78 79    /* If non-zero, use a bytearray instead of a bytes object for buffer. */80    int use_bytearray;81 82    /* If non-zero, overallocate the buffer (default: 0).83       This flag must be zero if use_bytearray is non-zero. */84    int overallocate;85 86    /* Stack buffer */87    int use_small_buffer;88    char small_buffer[512];89} _PyBytesWriter;90 91/* Initialize a bytes writer92 93   By default, the overallocation is disabled. Set the overallocate attribute94   to control the allocation of the buffer.95 96   Export _PyBytesWriter API for '_pickle' shared extension. */97PyAPI_FUNC(void) _PyBytesWriter_Init(_PyBytesWriter *writer);98 99/* Get the buffer content and reset the writer.100   Return a bytes object, or a bytearray object if use_bytearray is non-zero.101   Raise an exception and return NULL on error. */102PyAPI_FUNC(PyObject *) _PyBytesWriter_Finish(_PyBytesWriter *writer,103    void *str);104 105/* Deallocate memory of a writer (clear its internal buffer). */106PyAPI_FUNC(void) _PyBytesWriter_Dealloc(_PyBytesWriter *writer);107 108/* Allocate the buffer to write size bytes.109   Return the pointer to the beginning of buffer data.110   Raise an exception and return NULL on error. */111PyAPI_FUNC(void*) _PyBytesWriter_Alloc(_PyBytesWriter *writer,112    Py_ssize_t size);113 114/* Ensure that the buffer is large enough to write *size* bytes.115   Add size to the writer minimum size (min_size attribute).116 117   str is the current pointer inside the buffer.118   Return the updated current pointer inside the buffer.119   Raise an exception and return NULL on error. */120PyAPI_FUNC(void*) _PyBytesWriter_Prepare(_PyBytesWriter *writer,121    void *str,122    Py_ssize_t size);123 124/* Resize the buffer to make it larger.125   The new buffer may be larger than size bytes because of overallocation.126   Return the updated current pointer inside the buffer.127   Raise an exception and return NULL on error.128 129   Note: size must be greater than the number of allocated bytes in the writer.130 131   This function doesn't use the writer minimum size (min_size attribute).132 133   See also _PyBytesWriter_Prepare().134   */135PyAPI_FUNC(void*) _PyBytesWriter_Resize(_PyBytesWriter *writer,136    void *str,137    Py_ssize_t size);138 139/* Write bytes.140   Raise an exception and return NULL on error. */141PyAPI_FUNC(void*) _PyBytesWriter_WriteBytes(_PyBytesWriter *writer,142    void *str,143    const void *bytes,144    Py_ssize_t size);145 146#ifdef __cplusplus147}148#endif149#endif /* !Py_INTERNAL_BYTESOBJECT_H */150