pfenv.c 6.39 KB
Newer Older
Dave Hylands's avatar
Dave Hylands committed
1
2
3
4
5
6
7
#include <stdint.h>
#include <string.h>

#include "misc.h"
#include "mpconfig.h"
#include "qstr.h"
#include "obj.h"
8
9
#include "mpz.h"
#include "objint.h"
Dave Hylands's avatar
Dave Hylands committed
10
11
12
13
14
15
16
17
18
19
#include "pfenv.h"

#if MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_DOUBLE
#include <stdio.h>
#endif

#if MICROPY_ENABLE_FLOAT
#include "formatfloat.h"
#endif

20
21
static const char pad_spaces[] = "                ";
static const char pad_zeroes[] = "0000000000000000";
Dave Hylands's avatar
Dave Hylands committed
22
23
24
25
26
27
28
29
30

void pfenv_vstr_add_strn(void *data, const char *str, unsigned int len){
    vstr_add_strn(data, str, len);
}

int pfenv_print_strn(const pfenv_t *pfenv, const char *str, unsigned int len, int flags, char fill, int width) {
    int left_pad = 0;
    int right_pad = 0;
    int pad = width - len;
31
    int pad_size;
Dave Hylands's avatar
Dave Hylands committed
32
33
34
35
    const char *pad_chars;

    if (!fill || fill == ' ' ) {
        pad_chars = pad_spaces;
36
        pad_size = sizeof(pad_spaces) - 1;
Dave Hylands's avatar
Dave Hylands committed
37
38
    } else if (fill == '0') {
        pad_chars = pad_zeroes;
39
        pad_size = sizeof(pad_zeroes) - 1;
Dave Hylands's avatar
Dave Hylands committed
40
    } else {
41
42
43
44
        // Other pad characters are fairly unusual, so we'll take the hit
        // and output them 1 at a time.
        pad_chars = &fill;
        pad_size = 1;
Dave Hylands's avatar
Dave Hylands committed
45
46
47
48
49
50
51
52
53
54
55
56
57
58
    }

    if (flags & PF_FLAG_CENTER_ADJUST) {
        left_pad = pad / 2;
        right_pad = pad - left_pad;
    } else if (flags & PF_FLAG_LEFT_ADJUST) {
        right_pad = pad;
    } else {
        left_pad = pad;
    }

    if (left_pad) {
        while (left_pad > 0) {
            int p = left_pad;
59
            if (p > pad_size) {
60
                p = pad_size;
61
            }
Dave Hylands's avatar
Dave Hylands committed
62
63
64
65
66
67
68
69
            pfenv->print_strn(pfenv->data, pad_chars, p);
            left_pad -= p;
        }
    }
    pfenv->print_strn(pfenv->data, str, len);
    if (right_pad) {
        while (right_pad > 0) {
            int p = right_pad;
70
            if (p > pad_size) {
71
                p = pad_size;
72
            }
Dave Hylands's avatar
Dave Hylands committed
73
74
75
76
77
78
79
            pfenv->print_strn(pfenv->data, pad_chars, p);
            right_pad -= p;
        }
    }
    return len;
}

80
81
82
// 32-bits is 10 digits, add 3 for commas, 1 for sign, 1 for terminating null
// We can use 16 characters for 32-bit and 32 characters for 64-bit
#define INT_BUF_SIZE (sizeof(machine_int_t) * 4)
Dave Hylands's avatar
Dave Hylands committed
83

84
85
86
87
88
int pfenv_print_int(const pfenv_t *pfenv, mp_obj_t x, int sgn, int base, int base_char, int flags, char fill, int width) {
    if (!MP_OBJ_IS_INT(x)) {
        // This will convert booleans to int, or raise an error for
        // non-integer types.
        x = MP_OBJ_NEW_SMALL_INT(mp_obj_get_int(x));
Dave Hylands's avatar
Dave Hylands committed
89
90
    }

91
92
    char prefix_buf[4];
    char *prefix = prefix_buf;
Dave Hylands's avatar
Dave Hylands committed
93

94
95
96
97
98
99
    if (mp_obj_int_is_positive(x)) {
        if (flags & PF_FLAG_SHOW_SIGN) {
            *prefix++ = '+';
        } else if (flags & PF_FLAG_SPACE_SIGN) {
            *prefix++ = ' ';
        }
Dave Hylands's avatar
Dave Hylands committed
100
101
102
103
    }

    if (flags & PF_FLAG_SHOW_PREFIX) {
        if (base == 2) {
104
105
            *prefix++ = '0';
            *prefix++ = base_char + 'b' - 'a';
Dave Hylands's avatar
Dave Hylands committed
106
        } else if (base == 8) {
107
108
109
110
            *prefix++ = '0';
            if (flags & PF_FLAG_SHOW_OCTAL_LETTER) {
                *prefix++ = base_char + 'o' - 'a';
            }
Dave Hylands's avatar
Dave Hylands committed
111
        } else if (base == 16) {
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
            *prefix++ = '0';
            *prefix++ = base_char + 'x' - 'a';
        }
    }
    *prefix = '\0';
    int prefix_len = prefix - prefix_buf;
    prefix = prefix_buf;

    char comma = '\0';
    if (flags & PF_FLAG_SHOW_COMMA) {
        comma = ',';
    }

    // The size of this buffer is rather arbitrary. If it's not large
    // enough, a dynamic one will be allocated.
    char stack_buf[sizeof(machine_int_t) * 4];
    char *buf = stack_buf;
    int buf_size = sizeof(stack_buf);
    int fmt_size = 0;
    char *str;

    char sign = '\0';
    if (flags & PF_FLAG_PAD_AFTER_SIGN) {
        // We add the pad in this function, so since the pad goes after
        // the sign & prefix, we format without a prefix
        str = mp_obj_int_formatted(&buf, &buf_size, &fmt_size,
                                   x, base, NULL, base_char, comma);
        if (*str == '-') {
            sign = *str++;
            fmt_size--;
Dave Hylands's avatar
Dave Hylands committed
142
        }
143
144
145
    } else {
        str = mp_obj_int_formatted(&buf, &buf_size, &fmt_size,
                                   x, base, prefix, base_char, comma);
Dave Hylands's avatar
Dave Hylands committed
146
147
148
149
    }

    int len = 0;
    if (flags & PF_FLAG_PAD_AFTER_SIGN) {
150
        // pad after sign implies pad after prefix as well.
Dave Hylands's avatar
Dave Hylands committed
151
        if (sign) {
152
            len += pfenv_print_strn(pfenv, &sign, 1, 0, 0, 1);
Dave Hylands's avatar
Dave Hylands committed
153
154
            width--;
        }
155
156
157
        if (prefix_len) {
            len += pfenv_print_strn(pfenv, prefix, prefix_len, 0, 0, 1);
            width -= prefix_len;
Dave Hylands's avatar
Dave Hylands committed
158
159
160
        }
    }

161
162
163
164
165
    len += pfenv_print_strn(pfenv, str, fmt_size, flags, fill, width);

    if (buf != stack_buf) {
        m_free(buf, buf_size);
    }
Dave Hylands's avatar
Dave Hylands committed
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
    return len;
}

#if MICROPY_ENABLE_FLOAT
int pfenv_print_float(const pfenv_t *pfenv, mp_float_t f, char fmt, int flags, char fill, int width, int prec) {
    char buf[32];
    char sign = '\0';
    int chrs = 0;

    if (flags & PF_FLAG_SHOW_SIGN) {
        sign = '+';
    }
    else
    if (flags & PF_FLAG_SPACE_SIGN) {
        sign = ' ';
    }
    int len;
#if MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_FLOAT
    len = format_float(f, buf, sizeof(buf), fmt, prec, sign);
#elif MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_DOUBLE
    char fmt_buf[6];
    char *fmt_s = fmt_buf;

    *fmt_s++ = '%';
    if (sign) {
        *fmt_s++ = sign;
    }
    *fmt_s++ = '.';
    *fmt_s++ = '*';
    *fmt_s++ = fmt;
    *fmt_s = '\0';

    len = snprintf(buf, sizeof(buf), fmt_buf, prec, f);
#else
#error Unknown MICROPY FLOAT IMPL
#endif
    char *s = buf;

    if ((flags & PF_FLAG_ADD_PERCENT) && (len + 1) < sizeof(buf)) {
        buf[len++] = '%';
        buf[len] = '\0';
    }

    // buf[0] < '0' returns true if the first character is space, + or -
    if ((flags & PF_FLAG_PAD_AFTER_SIGN) && buf[0] < '0') {
        // We have a sign character
        s++;
        if (*s <= '9' || (flags & PF_FLAG_PAD_NAN_INF)) {
            // We have a number, or we have a inf/nan and PAD_NAN_INF is set
            // With '{:06e}'.format(float('-inf')) you get '-00inf'
            chrs += pfenv_print_strn(pfenv, &buf[0], 1, 0, 0, 1);
            width--;
            len--;
        }
    }

    if (*s > 'A' && (flags & PF_FLAG_PAD_NAN_INF) == 0) {
        // We have one of the inf or nan variants, suppress zero fill.
        // With printf, if you use: printf("%06e", -inf) then you get "  -inf"
        // so suppress the zero fill.
        fill = ' ';
    }
228
    chrs += pfenv_print_strn(pfenv, s, len, flags, fill, width);
Dave Hylands's avatar
Dave Hylands committed
229
230
231
232

    return chrs;
}
#endif