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Factor out quoted string print function for reuse (mp_str_print_quoted()).

This commit is contained in:
Paul Sokolovsky 2014-01-28 03:40:06 +02:00
parent 8e991e0680
commit 0b7e29c025
2 changed files with 36 additions and 31 deletions
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1
py/obj.h
View File

@ -291,6 +291,7 @@ uint mp_obj_str_get_len(mp_obj_t self_in);
qstr mp_obj_str_get_qstr(mp_obj_t self_in); // use this if you will anyway convert the string to a qstr
const char *mp_obj_str_get_str(mp_obj_t self_in); // use this only if you need the string to be null terminated
const byte *mp_obj_str_get_data(mp_obj_t self_in, uint *len);
void mp_str_print_quoted(void (*print)(void *env, const char *fmt, ...), void *env, const byte *str_data, uint str_len);
// bytes
extern const mp_obj_type_t bytes_type;

66
py/objstr.c
View File

@ -34,45 +34,49 @@ static mp_obj_t mp_obj_new_bytes_iterator(mp_obj_t str);
/******************************************************************************/
/* str */
void str_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
void mp_str_print_quoted(void (*print)(void *env, const char *fmt, ...), void *env, const byte *str_data, uint str_len) {
// this escapes characters, but it will be very slow to print (calling print many times)
bool has_single_quote = false;
bool has_double_quote = false;
for (const byte *s = str_data, *top = str_data + str_len; (!has_single_quote || !has_double_quote) && s < top; s++) {
if (*s == '\'') {
has_single_quote = true;
} else if (*s == '"') {
has_double_quote = true;
}
}
int quote_char = '\'';
if (has_single_quote && !has_double_quote) {
quote_char = '"';
}
print(env, "%c", quote_char);
for (const byte *s = str_data, *top = str_data + str_len; s < top; s++) {
if (*s == quote_char) {
print(env, "\\%c", quote_char);
} else if (*s == '\\') {
print(env, "\\\\");
} else if (32 <= *s && *s <= 126) {
print(env, "%c", *s);
} else if (*s == '\n') {
print(env, "\\n");
// TODO add more escape codes here if we want to match CPython
} else {
print(env, "\\x%02x", *s);
}
}
print(env, "%c", quote_char);
}
static void str_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
GET_STR_DATA_LEN(self_in, str_data, str_len);
bool is_bytes = MP_OBJ_IS_TYPE(self_in, &bytes_type);
if (kind == PRINT_STR && !is_bytes) {
print(env, "%.*s", str_len, str_data);
} else {
// this escapes characters, but it will be very slow to print (calling print many times)
bool has_single_quote = false;
bool has_double_quote = false;
for (const byte *s = str_data, *top = str_data + str_len; (!has_single_quote || !has_double_quote) && s < top; s++) {
if (*s == '\'') {
has_single_quote = true;
} else if (*s == '"') {
has_double_quote = true;
}
}
if (is_bytes) {
print(env, "b");
}
int quote_char = '\'';
if (has_single_quote && !has_double_quote) {
quote_char = '"';
}
print(env, "%c", quote_char);
for (const byte *s = str_data, *top = str_data + str_len; s < top; s++) {
if (*s == quote_char) {
print(env, "\\%c", quote_char);
} else if (*s == '\\') {
print(env, "\\\\");
} else if (32 <= *s && *s <= 126) {
print(env, "%c", *s);
} else if (*s == '\n') {
print(env, "\\n");
// TODO add more escape codes here if we want to match CPython
} else {
print(env, "\\x%02x", *s);
}
}
print(env, "%c", quote_char);
mp_str_print_quoted(print, env, str_data, str_len);
}
}