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annotate third_party/luajit/src/lj_strscan.c @ 279:b3b547563ec7
Add Google connector service and agent wiki
Implement the C/Seobeo Google Drive and Gmail connector with encrypted OAuth storage, Zenbu authentication, browser testing, AI tool discovery, chunked HTTP decoding, and Bazel coverage. Consolidate repository guidance into progressive wiki documentation and enforce arena-first allocation for new first-party C code.
Co-authored-by: Copilot <[email protected]>
Copilot-Session: 84c338fd-0939-4bb3-b7f3-1062eb213e5d
| author | MrJuneJune <me@mrjunejune.com> |
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| date | Mon, 17 Aug 2026 22:22:36 -0700 |
| parents | 94705b5986b3 |
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| rev | line source |
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1 /* |
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2 ** String scanning. |
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3 ** Copyright (C) 2005-2023 Mike Pall. See Copyright Notice in luajit.h |
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4 */ |
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5 |
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6 #include <math.h> |
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7 |
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8 #define lj_strscan_c |
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9 #define LUA_CORE |
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10 |
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11 #include "lj_obj.h" |
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12 #include "lj_char.h" |
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13 #include "lj_strscan.h" |
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14 |
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15 /* -- Scanning numbers ---------------------------------------------------- */ |
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16 |
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17 /* |
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18 ** Rationale for the builtin string to number conversion library: |
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19 ** |
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20 ** It removes a dependency on libc's strtod(), which is a true portability |
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21 ** nightmare. Mainly due to the plethora of supported OS and toolchain |
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22 ** combinations. Sadly, the various implementations |
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23 ** a) are often buggy, incomplete (no hex floats) and/or imprecise, |
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24 ** b) sometimes crash or hang on certain inputs, |
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25 ** c) return non-standard NaNs that need to be filtered out, and |
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26 ** d) fail if the locale-specific decimal separator is not a dot, |
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27 ** which can only be fixed with atrocious workarounds. |
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28 ** |
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29 ** Also, most of the strtod() implementations are hopelessly bloated, |
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30 ** which is not just an I-cache hog, but a problem for static linkage |
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31 ** on embedded systems, too. |
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32 ** |
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33 ** OTOH the builtin conversion function is very compact. Even though it |
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34 ** does a lot more, like parsing long longs, octal or imaginary numbers |
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35 ** and returning the result in different formats: |
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36 ** a) It needs less than 3 KB (!) of machine code (on x64 with -Os), |
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37 ** b) it doesn't perform any dynamic allocation and, |
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38 ** c) it needs only around 600 bytes of stack space. |
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39 ** |
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40 ** The builtin function is faster than strtod() for typical inputs, e.g. |
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41 ** "123", "1.5" or "1e6". Arguably, it's slower for very large exponents, |
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42 ** which are not very common (this could be fixed, if needed). |
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43 ** |
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44 ** And most importantly, the builtin function is equally precise on all |
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45 ** platforms. It correctly converts and rounds any input to a double. |
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46 ** If this is not the case, please send a bug report -- but PLEASE verify |
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47 ** that the implementation you're comparing to is not the culprit! |
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48 ** |
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49 ** The implementation quickly pre-scans the entire string first and |
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50 ** handles simple integers on-the-fly. Otherwise, it dispatches to the |
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51 ** base-specific parser. Hex and octal is straightforward. |
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52 ** |
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53 ** Decimal to binary conversion uses a fixed-length circular buffer in |
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54 ** base 100. Some simple cases are handled directly. For other cases, the |
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55 ** number in the buffer is up-scaled or down-scaled until the integer part |
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56 ** is in the proper range. Then the integer part is rounded and converted |
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57 ** to a double which is finally rescaled to the result. Denormals need |
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58 ** special treatment to prevent incorrect 'double rounding'. |
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59 */ |
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60 |
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61 /* Definitions for circular decimal digit buffer (base 100 = 2 digits/byte). */ |
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62 #define STRSCAN_DIG 1024 |
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63 #define STRSCAN_MAXDIG 800 /* 772 + extra are sufficient. */ |
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64 #define STRSCAN_DDIG (STRSCAN_DIG/2) |
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65 #define STRSCAN_DMASK (STRSCAN_DDIG-1) |
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66 #define STRSCAN_MAXEXP (1 << 20) |
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67 |
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68 /* Helpers for circular buffer. */ |
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69 #define DNEXT(a) (((a)+1) & STRSCAN_DMASK) |
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70 #define DPREV(a) (((a)-1) & STRSCAN_DMASK) |
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71 #define DLEN(lo, hi) ((int32_t)(((lo)-(hi)) & STRSCAN_DMASK)) |
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72 |
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73 #define casecmp(c, k) (((c) | 0x20) == k) |
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74 |
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75 /* Final conversion to double. */ |
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76 static void strscan_double(uint64_t x, TValue *o, int32_t ex2, int32_t neg) |
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77 { |
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78 double n; |
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79 |
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80 /* Avoid double rounding for denormals. */ |
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81 if (LJ_UNLIKELY(ex2 <= -1075 && x != 0)) { |
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82 /* NYI: all of this generates way too much code on 32 bit CPUs. */ |
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83 #if (defined(__GNUC__) || defined(__clang__)) && LJ_64 |
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84 int32_t b = (int32_t)(__builtin_clzll(x)^63); |
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85 #else |
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86 int32_t b = (x>>32) ? 32+(int32_t)lj_fls((uint32_t)(x>>32)) : |
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87 (int32_t)lj_fls((uint32_t)x); |
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88 #endif |
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89 if ((int32_t)b + ex2 <= -1023 && (int32_t)b + ex2 >= -1075) { |
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90 uint64_t rb = (uint64_t)1 << (-1075-ex2); |
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91 if ((x & rb) && ((x & (rb+rb+rb-1)))) x += rb+rb; |
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92 x = (x & ~(rb+rb-1)); |
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93 } |
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94 } |
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95 |
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96 /* Convert to double using a signed int64_t conversion, then rescale. */ |
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97 lj_assertX((int64_t)x >= 0, "bad double conversion"); |
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98 n = (double)(int64_t)x; |
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99 if (neg) n = -n; |
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100 if (ex2) n = ldexp(n, ex2); |
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101 o->n = n; |
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102 } |
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103 |
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104 /* Parse hexadecimal number. */ |
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105 static StrScanFmt strscan_hex(const uint8_t *p, TValue *o, |
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106 StrScanFmt fmt, uint32_t opt, |
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107 int32_t ex2, int32_t neg, uint32_t dig) |
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108 { |
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109 uint64_t x = 0; |
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110 uint32_t i; |
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111 |
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112 /* Scan hex digits. */ |
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113 for (i = dig > 16 ? 16 : dig ; i; i--, p++) { |
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114 uint32_t d = (*p != '.' ? *p : *++p); if (d > '9') d += 9; |
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115 x = (x << 4) + (d & 15); |
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116 } |
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117 |
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118 /* Summarize rounding-effect of excess digits. */ |
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119 for (i = 16; i < dig; i++, p++) |
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120 x |= ((*p != '.' ? *p : *++p) != '0'), ex2 += 4; |
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121 |
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122 /* Format-specific handling. */ |
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123 switch (fmt) { |
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124 case STRSCAN_INT: |
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125 if (!(opt & STRSCAN_OPT_TONUM) && x < 0x80000000u+neg && |
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126 !(x == 0 && neg)) { |
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127 o->i = neg ? (int32_t)(~x+1u) : (int32_t)x; |
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128 return STRSCAN_INT; /* Fast path for 32 bit integers. */ |
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129 } |
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130 if (!(opt & STRSCAN_OPT_C)) { fmt = STRSCAN_NUM; break; } |
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131 /* fallthrough */ |
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132 case STRSCAN_U32: |
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133 if (dig > 8) return STRSCAN_ERROR; |
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134 o->i = neg ? (int32_t)(~x+1u) : (int32_t)x; |
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135 return STRSCAN_U32; |
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136 case STRSCAN_I64: |
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137 case STRSCAN_U64: |
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138 if (dig > 16) return STRSCAN_ERROR; |
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139 o->u64 = neg ? ~x+1u : x; |
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140 return fmt; |
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141 default: |
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142 break; |
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143 } |
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144 |
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145 /* Reduce range, then convert to double. */ |
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146 if ((x & U64x(c0000000,0000000))) { x = (x >> 2) | (x & 3); ex2 += 2; } |
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147 strscan_double(x, o, ex2, neg); |
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148 return fmt; |
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149 } |
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150 |
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151 /* Parse octal number. */ |
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152 static StrScanFmt strscan_oct(const uint8_t *p, TValue *o, |
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153 StrScanFmt fmt, int32_t neg, uint32_t dig) |
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154 { |
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155 uint64_t x = 0; |
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156 |
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157 /* Scan octal digits. */ |
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158 if (dig > 22 || (dig == 22 && *p > '1')) return STRSCAN_ERROR; |
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159 while (dig-- > 0) { |
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160 if (!(*p >= '0' && *p <= '7')) return STRSCAN_ERROR; |
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161 x = (x << 3) + (*p++ & 7); |
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162 } |
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163 |
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164 /* Format-specific handling. */ |
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165 switch (fmt) { |
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166 case STRSCAN_INT: |
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167 if (x >= 0x80000000u+neg) fmt = STRSCAN_U32; |
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168 /* fallthrough */ |
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169 case STRSCAN_U32: |
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170 if ((x >> 32)) return STRSCAN_ERROR; |
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171 o->i = neg ? (int32_t)(~(uint32_t)x+1u) : (int32_t)x; |
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172 break; |
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173 default: |
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174 case STRSCAN_I64: |
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175 case STRSCAN_U64: |
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176 o->u64 = neg ? ~x+1u : x; |
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177 break; |
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178 } |
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179 return fmt; |
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180 } |
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181 |
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182 /* Parse decimal number. */ |
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183 static StrScanFmt strscan_dec(const uint8_t *p, TValue *o, |
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184 StrScanFmt fmt, uint32_t opt, |
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185 int32_t ex10, int32_t neg, uint32_t dig) |
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186 { |
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187 uint8_t xi[STRSCAN_DDIG], *xip = xi; |
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188 |
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189 if (dig) { |
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190 uint32_t i = dig; |
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191 if (i > STRSCAN_MAXDIG) { |
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192 ex10 += (int32_t)(i - STRSCAN_MAXDIG); |
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193 i = STRSCAN_MAXDIG; |
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194 } |
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195 /* Scan unaligned leading digit. */ |
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196 if (((ex10^i) & 1)) |
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197 *xip++ = ((*p != '.' ? *p : *++p) & 15), i--, p++; |
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198 /* Scan aligned double-digits. */ |
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199 for ( ; i > 1; i -= 2) { |
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200 uint32_t d = 10 * ((*p != '.' ? *p : *++p) & 15); p++; |
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201 *xip++ = d + ((*p != '.' ? *p : *++p) & 15); p++; |
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202 } |
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203 /* Scan and realign trailing digit. */ |
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204 if (i) *xip++ = 10 * ((*p != '.' ? *p : *++p) & 15), ex10--, dig++, p++; |
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205 |
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206 /* Summarize rounding-effect of excess digits. */ |
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207 if (dig > STRSCAN_MAXDIG) { |
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208 do { |
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209 if ((*p != '.' ? *p : *++p) != '0') { xip[-1] |= 1; break; } |
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210 p++; |
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211 } while (--dig > STRSCAN_MAXDIG); |
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212 dig = STRSCAN_MAXDIG; |
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213 } else { /* Simplify exponent. */ |
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214 while (ex10 > 0 && dig <= 18) *xip++ = 0, ex10 -= 2, dig += 2; |
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215 } |
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216 } else { /* Only got zeros. */ |
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217 ex10 = 0; |
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218 xi[0] = 0; |
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219 } |
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220 |
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221 /* Fast path for numbers in integer format (but handles e.g. 1e6, too). */ |
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222 if (dig <= 20 && ex10 == 0) { |
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223 uint8_t *xis; |
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224 uint64_t x = xi[0]; |
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225 double n; |
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226 for (xis = xi+1; xis < xip; xis++) x = x * 100 + *xis; |
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227 if (!(dig == 20 && (xi[0] > 18 || (int64_t)x >= 0))) { /* No overflow? */ |
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228 /* Format-specific handling. */ |
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229 switch (fmt) { |
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230 case STRSCAN_INT: |
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231 if (!(opt & STRSCAN_OPT_TONUM) && x < 0x80000000u+neg) { |
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232 o->i = neg ? (int32_t)(~x+1u) : (int32_t)x; |
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233 return STRSCAN_INT; /* Fast path for 32 bit integers. */ |
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234 } |
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235 if (!(opt & STRSCAN_OPT_C)) { fmt = STRSCAN_NUM; goto plainnumber; } |
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236 /* fallthrough */ |
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237 case STRSCAN_U32: |
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238 if ((x >> 32) != 0) return STRSCAN_ERROR; |
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239 o->i = neg ? (int32_t)(~x+1u) : (int32_t)x; |
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240 return STRSCAN_U32; |
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241 case STRSCAN_I64: |
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242 case STRSCAN_U64: |
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243 o->u64 = neg ? ~x+1u : x; |
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244 return fmt; |
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245 default: |
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246 plainnumber: /* Fast path for plain numbers < 2^63. */ |
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247 if ((int64_t)x < 0) break; |
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248 n = (double)(int64_t)x; |
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249 if (neg) n = -n; |
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250 o->n = n; |
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251 return fmt; |
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252 } |
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253 } |
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254 } |
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255 |
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256 /* Slow non-integer path. */ |
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257 if (fmt == STRSCAN_INT) { |
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258 if ((opt & STRSCAN_OPT_C)) return STRSCAN_ERROR; |
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259 fmt = STRSCAN_NUM; |
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260 } else if (fmt > STRSCAN_INT) { |
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261 return STRSCAN_ERROR; |
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262 } |
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263 { |
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264 uint32_t hi = 0, lo = (uint32_t)(xip-xi); |
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265 int32_t ex2 = 0, idig = (int32_t)lo + (ex10 >> 1); |
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266 |
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267 lj_assertX(lo > 0 && (ex10 & 1) == 0, "bad lo %d ex10 %d", lo, ex10); |
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268 |
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269 /* Handle simple overflow/underflow. */ |
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270 if (idig > 310/2) { if (neg) setminfV(o); else setpinfV(o); return fmt; } |
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271 else if (idig < -326/2) { o->n = neg ? -0.0 : 0.0; return fmt; } |
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272 |
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273 /* Scale up until we have at least 17 or 18 integer part digits. */ |
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274 while (idig < 9 && idig < DLEN(lo, hi)) { |
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275 uint32_t i, cy = 0; |
|
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276 ex2 -= 6; |
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277 for (i = DPREV(lo); ; i = DPREV(i)) { |
|
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278 uint32_t d = (xi[i] << 6) + cy; |
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279 cy = (((d >> 2) * 5243) >> 17); d = d - cy * 100; /* Div/mod 100. */ |
|
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280 xi[i] = (uint8_t)d; |
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281 if (i == hi) break; |
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282 if (d == 0 && i == DPREV(lo)) lo = i; |
|
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283 } |
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284 if (cy) { |
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285 hi = DPREV(hi); |
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286 if (xi[DPREV(lo)] == 0) lo = DPREV(lo); |
|
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287 else if (hi == lo) { lo = DPREV(lo); xi[DPREV(lo)] |= xi[lo]; } |
|
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288 xi[hi] = (uint8_t)cy; idig++; |
|
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289 } |
|
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290 } |
|
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291 |
|
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parents:
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292 /* Scale down until no more than 17 or 18 integer part digits remain. */ |
|
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293 while (idig > 9) { |
|
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294 uint32_t i = hi, cy = 0; |
|
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295 ex2 += 6; |
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296 do { |
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297 cy += xi[i]; |
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298 xi[i] = (cy >> 6); |
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299 cy = 100 * (cy & 0x3f); |
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300 if (xi[i] == 0 && i == hi) hi = DNEXT(hi), idig--; |
|
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301 i = DNEXT(i); |
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302 } while (i != lo); |
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parents:
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303 while (cy) { |
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parents:
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304 if (hi == lo) { xi[DPREV(lo)] |= 1; break; } |
|
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305 xi[lo] = (cy >> 6); lo = DNEXT(lo); |
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306 cy = 100 * (cy & 0x3f); |
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307 } |
|
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308 } |
|
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309 |
|
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parents:
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|
310 /* Collect integer part digits and convert to rescaled double. */ |
|
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parents:
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311 { |
|
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312 uint64_t x = xi[hi]; |
|
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parents:
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313 uint32_t i; |
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parents:
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314 for (i = DNEXT(hi); --idig > 0 && i != lo; i = DNEXT(i)) |
|
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parents:
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315 x = x * 100 + xi[i]; |
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parents:
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316 if (i == lo) { |
|
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parents:
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317 while (--idig >= 0) x = x * 100; |
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parents:
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318 } else { /* Gather round bit from remaining digits. */ |
|
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319 x <<= 1; ex2--; |
|
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parents:
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320 do { |
|
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parents:
diff
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321 if (xi[i]) { x |= 1; break; } |
|
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parents:
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322 i = DNEXT(i); |
|
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parents:
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323 } while (i != lo); |
|
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parents:
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324 } |
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325 strscan_double(x, o, ex2, neg); |
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326 } |
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327 } |
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328 return fmt; |
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329 } |
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330 |
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331 /* Parse binary number. */ |
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332 static StrScanFmt strscan_bin(const uint8_t *p, TValue *o, |
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333 StrScanFmt fmt, uint32_t opt, |
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334 int32_t ex2, int32_t neg, uint32_t dig) |
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335 { |
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336 uint64_t x = 0; |
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337 uint32_t i; |
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338 |
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339 if (ex2 || dig > 64) return STRSCAN_ERROR; |
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340 |
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341 /* Scan binary digits. */ |
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342 for (i = dig; i; i--, p++) { |
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343 if ((*p & ~1) != '0') return STRSCAN_ERROR; |
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344 x = (x << 1) | (*p & 1); |
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345 } |
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346 |
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347 /* Format-specific handling. */ |
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348 switch (fmt) { |
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349 case STRSCAN_INT: |
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350 if (!(opt & STRSCAN_OPT_TONUM) && x < 0x80000000u+neg) { |
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351 o->i = neg ? (int32_t)(~x+1u) : (int32_t)x; |
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352 return STRSCAN_INT; /* Fast path for 32 bit integers. */ |
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353 } |
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354 if (!(opt & STRSCAN_OPT_C)) { fmt = STRSCAN_NUM; break; } |
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355 /* fallthrough */ |
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356 case STRSCAN_U32: |
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357 if (dig > 32) return STRSCAN_ERROR; |
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358 o->i = neg ? (int32_t)(~x+1u) : (int32_t)x; |
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359 return STRSCAN_U32; |
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360 case STRSCAN_I64: |
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361 case STRSCAN_U64: |
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362 o->u64 = neg ? ~x+1u : x; |
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363 return fmt; |
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364 default: |
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365 break; |
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366 } |
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367 |
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parents:
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368 /* Reduce range, then convert to double. */ |
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369 if ((x & U64x(c0000000,0000000))) { x = (x >> 2) | (x & 3); ex2 += 2; } |
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parents:
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370 strscan_double(x, o, ex2, neg); |
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371 return fmt; |
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372 } |
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373 |
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374 /* Scan string containing a number. Returns format. Returns value in o. */ |
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parents:
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375 StrScanFmt lj_strscan_scan(const uint8_t *p, MSize len, TValue *o, |
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376 uint32_t opt) |
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377 { |
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378 int32_t neg = 0; |
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379 const uint8_t *pe = p + len; |
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380 |
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381 /* Remove leading space, parse sign and non-numbers. */ |
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382 if (LJ_UNLIKELY(!lj_char_isdigit(*p))) { |
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383 while (lj_char_isspace(*p)) p++; |
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384 if (*p == '+' || *p == '-') neg = (*p++ == '-'); |
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385 if (LJ_UNLIKELY(*p >= 'A')) { /* Parse "inf", "infinity" or "nan". */ |
|
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parents:
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386 TValue tmp; |
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387 setnanV(&tmp); |
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parents:
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388 if (casecmp(p[0],'i') && casecmp(p[1],'n') && casecmp(p[2],'f')) { |
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parents:
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389 if (neg) setminfV(&tmp); else setpinfV(&tmp); |
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390 p += 3; |
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parents:
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391 if (casecmp(p[0],'i') && casecmp(p[1],'n') && casecmp(p[2],'i') && |
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parents:
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392 casecmp(p[3],'t') && casecmp(p[4],'y')) p += 5; |
|
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parents:
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393 } else if (casecmp(p[0],'n') && casecmp(p[1],'a') && casecmp(p[2],'n')) { |
|
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parents:
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394 p += 3; |
|
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parents:
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395 } |
|
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parents:
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396 while (lj_char_isspace(*p)) p++; |
|
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parents:
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397 if (*p || p < pe) return STRSCAN_ERROR; |
|
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parents:
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|
398 o->u64 = tmp.u64; |
|
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parents:
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399 return STRSCAN_NUM; |
|
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parents:
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400 } |
|
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parents:
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401 } |
|
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parents:
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|
402 |
|
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parents:
diff
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|
403 /* Parse regular number. */ |
|
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parents:
diff
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|
404 { |
|
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parents:
diff
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|
405 StrScanFmt fmt = STRSCAN_INT; |
|
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parents:
diff
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|
406 int cmask = LJ_CHAR_DIGIT; |
|
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parents:
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407 int base = (opt & STRSCAN_OPT_C) && *p == '0' ? 0 : 10; |
|
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parents:
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|
408 const uint8_t *sp, *dp = NULL; |
|
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parents:
diff
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|
409 uint32_t dig = 0, hasdig = 0, x = 0; |
|
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parents:
diff
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|
410 int32_t ex = 0; |
|
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parents:
diff
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|
411 |
|
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parents:
diff
changeset
|
412 /* Determine base and skip leading zeros. */ |
|
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parents:
diff
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|
413 if (LJ_UNLIKELY(*p <= '0')) { |
|
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parents:
diff
changeset
|
414 if (*p == '0') { |
|
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parents:
diff
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|
415 if (casecmp(p[1], 'x')) |
|
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parents:
diff
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|
416 base = 16, cmask = LJ_CHAR_XDIGIT, p += 2; |
|
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parents:
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|
417 else if (casecmp(p[1], 'b')) |
|
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parents:
diff
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|
418 base = 2, cmask = LJ_CHAR_DIGIT, p += 2; |
|
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parents:
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419 } |
|
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parents:
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420 for ( ; ; p++) { |
|
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parents:
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|
421 if (*p == '0') { |
|
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parents:
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|
422 hasdig = 1; |
|
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parents:
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|
423 } else if (*p == '.') { |
|
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parents:
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424 if (dp) return STRSCAN_ERROR; |
|
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parents:
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|
425 dp = p; |
|
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parents:
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|
426 } else { |
|
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parents:
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427 break; |
|
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parents:
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428 } |
|
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parents:
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429 } |
|
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parents:
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|
430 } |
|
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parents:
diff
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|
431 |
|
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parents:
diff
changeset
|
432 /* Preliminary digit and decimal point scan. */ |
|
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parents:
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433 for (sp = p; ; p++) { |
|
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parents:
diff
changeset
|
434 if (LJ_LIKELY(lj_char_isa(*p, cmask))) { |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
435 x = x * 10 + (*p & 15); /* For fast path below. */ |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
436 dig++; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
437 } else if (*p == '.') { |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
438 if (dp) return STRSCAN_ERROR; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
439 dp = p; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
440 } else { |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
441 break; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
442 } |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
443 } |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
444 if (!(hasdig | dig)) return STRSCAN_ERROR; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
445 |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
446 /* Handle decimal point. */ |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
447 if (dp) { |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
448 if (base == 2) return STRSCAN_ERROR; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
449 fmt = STRSCAN_NUM; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
450 if (dig) { |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
451 ex = (int32_t)(dp-(p-1)); dp = p-1; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
452 while (ex < 0 && *dp-- == '0') ex++, dig--; /* Skip trailing zeros. */ |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
453 if (ex <= -STRSCAN_MAXEXP) return STRSCAN_ERROR; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
454 if (base == 16) ex *= 4; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
455 } |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
456 } |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
457 |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
458 /* Parse exponent. */ |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
459 if (base >= 10 && casecmp(*p, (uint32_t)(base == 16 ? 'p' : 'e'))) { |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
460 uint32_t xx; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
461 int negx = 0; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
462 fmt = STRSCAN_NUM; p++; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
463 if (*p == '+' || *p == '-') negx = (*p++ == '-'); |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
464 if (!lj_char_isdigit(*p)) return STRSCAN_ERROR; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
465 xx = (*p++ & 15); |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
466 while (lj_char_isdigit(*p)) { |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
467 xx = xx * 10 + (*p & 15); |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
468 if (xx >= STRSCAN_MAXEXP) return STRSCAN_ERROR; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
469 p++; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
470 } |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
471 ex += negx ? (int32_t)(~xx+1u) : (int32_t)xx; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
472 } |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
473 |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
474 /* Parse suffix. */ |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
475 if (*p) { |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
476 /* I (IMAG), U (U32), LL (I64), ULL/LLU (U64), L (long), UL/LU (ulong). */ |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
477 /* NYI: f (float). Not needed until cp_number() handles non-integers. */ |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
478 if (casecmp(*p, 'i')) { |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
479 if (!(opt & STRSCAN_OPT_IMAG)) return STRSCAN_ERROR; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
480 p++; fmt = STRSCAN_IMAG; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
481 } else if (fmt == STRSCAN_INT) { |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
482 if (casecmp(*p, 'u')) p++, fmt = STRSCAN_U32; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
483 if (casecmp(*p, 'l')) { |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
484 p++; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
485 if (casecmp(*p, 'l')) p++, fmt += STRSCAN_I64 - STRSCAN_INT; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
486 else if (!(opt & STRSCAN_OPT_C)) return STRSCAN_ERROR; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
487 else if (sizeof(long) == 8) fmt += STRSCAN_I64 - STRSCAN_INT; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
488 } |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
489 if (casecmp(*p, 'u') && (fmt == STRSCAN_INT || fmt == STRSCAN_I64)) |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
490 p++, fmt += STRSCAN_U32 - STRSCAN_INT; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
491 if ((fmt == STRSCAN_U32 && !(opt & STRSCAN_OPT_C)) || |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
492 (fmt >= STRSCAN_I64 && !(opt & STRSCAN_OPT_LL))) |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
493 return STRSCAN_ERROR; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
494 } |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
495 while (lj_char_isspace(*p)) p++; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
496 if (*p) return STRSCAN_ERROR; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
497 } |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
498 if (p < pe) return STRSCAN_ERROR; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
499 |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
500 /* Fast path for decimal 32 bit integers. */ |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
501 if (fmt == STRSCAN_INT && base == 10 && |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
502 (dig < 10 || (dig == 10 && *sp <= '2' && x < 0x80000000u+neg))) { |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
503 if ((opt & STRSCAN_OPT_TONUM)) { |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
504 o->n = neg ? -(double)x : (double)x; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
505 return STRSCAN_NUM; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
506 } else if (x == 0 && neg) { |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
507 o->n = -0.0; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
508 return STRSCAN_NUM; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
509 } else { |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
510 o->i = neg ? (int32_t)(~x+1u) : (int32_t)x; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
511 return STRSCAN_INT; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
512 } |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
513 } |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
514 |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
515 /* Dispatch to base-specific parser. */ |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
516 if (base == 0 && !(fmt == STRSCAN_NUM || fmt == STRSCAN_IMAG)) |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
517 return strscan_oct(sp, o, fmt, neg, dig); |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
518 if (base == 16) |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
519 fmt = strscan_hex(sp, o, fmt, opt, ex, neg, dig); |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
520 else if (base == 2) |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
521 fmt = strscan_bin(sp, o, fmt, opt, ex, neg, dig); |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
522 else |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
523 fmt = strscan_dec(sp, o, fmt, opt, ex, neg, dig); |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
524 |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
525 /* Try to convert number to integer, if requested. */ |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
526 if (fmt == STRSCAN_NUM && (opt & STRSCAN_OPT_TOINT) && !tvismzero(o)) { |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
527 double n = o->n; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
528 int32_t i = lj_num2int(n); |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
529 if (n == (lua_Number)i) { o->i = i; return STRSCAN_INT; } |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
530 } |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
531 return fmt; |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
532 } |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
533 } |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
534 |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
535 int LJ_FASTCALL lj_strscan_num(GCstr *str, TValue *o) |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
536 { |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
537 StrScanFmt fmt = lj_strscan_scan((const uint8_t *)strdata(str), str->len, o, |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
538 STRSCAN_OPT_TONUM); |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
539 lj_assertX(fmt == STRSCAN_ERROR || fmt == STRSCAN_NUM, "bad scan format"); |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
540 return (fmt != STRSCAN_ERROR); |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
541 } |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
|
542 |
|
94705b5986b3
[ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff
changeset
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543 #if LJ_DUALNUM |
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544 int LJ_FASTCALL lj_strscan_number(GCstr *str, TValue *o) |
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545 { |
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546 StrScanFmt fmt = lj_strscan_scan((const uint8_t *)strdata(str), str->len, o, |
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547 STRSCAN_OPT_TOINT); |
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548 lj_assertX(fmt == STRSCAN_ERROR || fmt == STRSCAN_NUM || fmt == STRSCAN_INT, |
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549 "bad scan format"); |
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550 if (fmt == STRSCAN_INT) setitype(o, LJ_TISNUM); |
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551 return (fmt != STRSCAN_ERROR); |
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552 } |
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553 #endif |
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554 |
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555 #undef DNEXT |
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556 #undef DPREV |
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557 #undef DLEN |
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558 |