annotate modules/string.tp @ 339:74cab9b5f2a4

Added parseFloat64 and parseFloat32 along with a sample that exercises number parsing from a string
author Michael Pavone <pavone@retrodev.com>
date Sat, 04 Apr 2015 12:34:43 -0700
parents 8dbb2d2522a5
children 6871e72b6db2
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1 #{
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2 llProperty: len withType: uint32_t
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3 llProperty: bytes withType: uint32_t
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4 llProperty: data withType: (char ptr)
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5
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6 llMessage: length withVars: {
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7 intret <- (obj_int32 ptr)
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8 } andCode: {
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9 intret <- make_object: (addr_of: obj_int32_meta) NULL 0
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10 intret num!: len
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11 intret
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12 }
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14 llMessage: byte_length withVars: {
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15 intret <- (obj_int32 ptr)
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16 } andCode: {
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17 intret <- make_object: (addr_of: obj_int32_meta) NULL 0
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18 intret num!: bytes
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19 intret
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20 }
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22 llMessage: "=" withVars: {
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23 argb <- (string ptr)
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24 } andCode: :argb {
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25 if: len = (argb len) && bytes = (argb bytes) && (not: (memcmp: data (argb data) bytes)) {
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26 true
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27 }
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28 }
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30 llMessage: compareSub withVars: {
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31 argb <- string ptr
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32 myoff <- obj_int32 ptr
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33 boff <- obj_int32 ptr
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34 clen <- obj_int32 ptr
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35 intret <- obj_int32 ptr
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36 } andCode: :argb myoff boff clen {
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37 intret <- make_object: (addr_of: obj_int32_meta) NULL 0
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38 intret num!: (memcmp: data + (myoff num) (argb data) + (boff num) (clen num))
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39 intret
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40 }
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42 llMessage: "!=" withVars: {
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43 argb <- (string ptr)
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44 } andCode: :argb {
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45 if: len != (argb len) || bytes != (argb bytes) || (memcmp: data (argb data) bytes) {
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46 true
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47 }
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48 }
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50 print <- {
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51 (file stdout) write: self
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52 self
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53 }
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55 llMessage: string withVars: {} andCode: {
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56 self
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57 }
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59 llMessage: "." withVars: {
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60 argbo <- (object ptr)
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61 argb <- (string ptr)
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62 out <- (string ptr)
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63 } andCode: :argbo {
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64 argb <- (mcall: string 1 argbo) castTo: (string ptr)
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65 out <- make_object: (addr_of: string_meta) NULL 0
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66 out bytes!: bytes + (argb bytes)
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67 out len!: len + (argb len)
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68 out data!: (GC_MALLOC_ATOMIC: (out bytes) + 1)
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69 memcpy: (out data) data bytes
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70 memcpy: (out data) + bytes (argb data) (argb bytes) + 1
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71 out
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72 }
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74 llMessage: byte withVars: {
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75 index <- (obj_int32 ptr)
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76 intret <- (obj_int32 ptr)
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77 } andCode: :index {
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78 intret <- make_object: (addr_of: obj_int32_meta) NULL 0
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79 intret num!: (if: (index num) < bytes { data get: (index num) } else: {0})
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80 intret
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81 }
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83 llMessage: int32 withVars: {
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84 intret <- (obj_int32 ptr)
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85 } andCode: {
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86 intret <- make_object: (addr_of: obj_int32_meta) NULL 0
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87 intret num!: (atoi: data)
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88 intret
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89 }
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91 parseHex32 <- {
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92 num <- 0u32
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93 cur <- 0
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94 a <- uint32: ("a" byte: 0)
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95 A <- uint32: ("A" byte: 0)
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96 f <- uint32: ("f" byte: 0)
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97 F <- uint32: ("F" byte: 0)
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98 zero <- "0" byte: 0
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99 nine <- "9" byte: 0
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100 while: { cur < byte_length} do: {
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101 b <- uint32: (byte: cur)
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102 cur <- cur + 1
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103 if: b >= zero && b <= nine {
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104 num <- num * 16 + (b - zero)
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105 } else: {
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106 if: b >= a && b <= f {
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107 num <- num * 16 + (b - a) + 10u32
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108 } else: {
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109 if: b >= A && b <= F {
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110 num <- num * 16 + (b - A) + 10u32
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111 } else: {
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112 cur <- byte_length
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113 }
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114 }
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115 }
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116 }
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117 num
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118 }
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119
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120 parseHex64 <- {
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121 num <- 0u64
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122 cur <- 0
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123 a <- uint64: ("a" byte: 0)
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124 A <- uint64: ("A" byte: 0)
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125 f <- uint64: ("f" byte: 0)
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126 F <- uint64: ("F" byte: 0)
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127 zero <- "0" byte: 0
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128 nine <- "9" byte: 0
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129 while: { cur < byte_length} do: {
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130 b <- uint64: (byte: cur)
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131 cur <- cur + 1
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132 if: b >= zero && b <= nine {
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133 num <- num * 16 + (b - zero)
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134 } else: {
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135 if: b >= a && b <= f {
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136 num <- num * 16 + (b - a) + 10u64
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137 } else: {
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138 if: b >= A && b <= F {
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139 num <- num * 16 + (b - A) + 10u64
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140 } else: {
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141 cur <- byte_length
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142 }
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143 }
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144 }
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145 }
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146 num
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147 }
339
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148
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149 llMessage: parseFloat64 withVars: {
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150 fret64 <- obj_float64 ptr
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151 } andCode: {
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152 //TODO: This should probably detect non-numeric values and return an option type
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153 fret64 <- make_object: (addr_of: obj_float64_meta) NULL 0
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154 fret64 num!: (atof: data)
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155 fret64
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156 }
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157
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158 parseFloat32 <- {
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159 parseFloat64 f32
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160 }
158
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161
88
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162 llMessage: hash withVars: {
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163 intret <- (obj_int32 ptr)
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164 i <- uint32_t
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165 } andCode: {
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166 intret <- make_object: (addr_of: obj_int32_meta) NULL 0
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167 intret num!: 0
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168 if: bytes {
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169 intret num!: (data get: 0) * 128
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170 i <- 0
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171 while: { i < bytes } do: {
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172 intret num!: (1000003 * (intret num)) xor (data get: i)
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173 i <- i + 1
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174 }
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175 intret num!: (intret num) xor bytes
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176 }
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177 intret
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178 }
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179
154
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180 llMessage: find:startingAt:else withVars: {
150
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181 intret <- obj_int32 ptr
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182 oneedle <- object ptr
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183 startpos <- obj_int32 ptr
150
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184 ifNotFound <- object ptr
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185 sneedle <- string ptr
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186 i <- uint32_t
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187 notFound <- uint32_t
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188 } andCode: :oneedle :startpos :ifNotFound {
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189 sneedle <- (mcall: string 1 oneedle) castTo: (string ptr)
154
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190 i <- startpos num
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191 notFound <- 1
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192 while: { notFound && i + (sneedle bytes) <= bytes} do: {
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193 if: (memcmp: data + i (sneedle data) (sneedle bytes)) = 0 {
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194 notFound <- 0
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195 } else: {
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196 i <- i + 1
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197 }
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198 }
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199 if: notFound {
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200 ccall: ifNotFound 0
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201 } else: {
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202 intret <- make_object: (addr_of: obj_int32_meta) NULL 0
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203 intret num!: i
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204 intret
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205 }
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206 }
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207
154
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208 find:else <- :toFind :orElse {
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209 find: toFind startingAt: 0 else: orElse
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210 }
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211
151
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212 llMessage: from:withLength withVars: {
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213 from <- obj_int32 ptr
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214 tocopy <- obj_int32 ptr
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215 ret <- string ptr
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216 start <- int32_t
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217 clampedLen <- int32_t
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218 } andCode: :from :tocopy {
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219 start <- from num
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220 if: start < 0 {
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221 start <- bytes + start
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222 }
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223 if: start > bytes {
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224 start <- bytes
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225 }
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226 clampedLen <- tocopy num
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227 if: clampedLen < 0 {
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228 clampedLen <- bytes - clampedLen
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229 if: clampedLen < 0 {
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230 clampedLen <- 0
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231 }
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232 }
151
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233 if: start + clampedLen > bytes {
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234 clampedLen <- bytes - start
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235 }
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236 ret <- make_object: (addr_of: string_meta) NULL 0
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237 ret data!: (GC_MALLOC_ATOMIC: clampedLen + 1)
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238 memcpy: (ret data) data + start clampedLen
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239 ret len!: clampedLen
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240 ret bytes!: clampedLen
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241 (ret data) set: clampedLen 0
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242 ret
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243 }
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244
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245 from <- :start {
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246 from: start withLength: length
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247 }
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248
152
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249 partitionOn <- :delim {
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250 pos <- find: delim else: { -1 }
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251 if: pos >= 0 {
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252 _before <- from: 0 withLength: pos
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253 _after <- from: (pos + (delim length))
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254 #{
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255 before <- _before
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256 after <- _after
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257 }
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258 } else: {
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259 _before <- self
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260 #{
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261 before <- _before
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262 after <- ""
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263 }
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264 }
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265 }
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266
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267 splitOn <- :delim {
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268 pos <- 0
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269 pieces <- #[]
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270 while: {
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271 pos <- find: delim else: { -1 }
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272 pos >= 0
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273 } do: {
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274 pieces append: (from: 0 withLength: pos)
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275 self <- from: pos + (delim length)
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276 }
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277 pieces append: self
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278 }
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279
259
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280 ltrim <- {
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281 l <- length
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282 start <- 0
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283 space <- " " byte: 0
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284 tab <- "\t" byte: 0
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285 nl <- "\n" byte: 0
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286 cr <- "\r" byte: 0
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287
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288 while: {
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289 if: start < l {
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290 b <- byte: start
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291 b = space || b = tab || b = nl || b = cr
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292 }
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293 } do: {
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294 start <- start + 1
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295 }
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296 from: start
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297 }
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298
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299 trim <- {
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300 l <- length
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301 start <- 0
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302 space <- " " byte: 0
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303 tab <- "\t" byte: 0
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304 nl <- "\n" byte: 0
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305 cr <- "\r" byte: 0
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306
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307 while: {
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308 if: start < l {
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309 b <- byte: start
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310 b = space || b = tab || b = nl || b = cr
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311 }
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312 } do: {
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313 start <- start + 1
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314 }
306
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315 end <- l - 1
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316 while: {
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317 if: end > start {
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318 b <- byte: end
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319 b = space || b = tab || b = nl || b = cr
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320 }
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321 } do: {
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322 end <- end - 1
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323 }
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324 from: start withLength: (end + 1 - start)
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325 }
301
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326
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327 startsWith? <- :prefix {
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328 if: (prefix length) <= length {
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329 0 = (compareSub: prefix 0 0 (prefix length))
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330 }
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331 }
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332
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333 endsWith? <- :suffix {
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334 if: (suffix length) <= length {
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335 0 = (compareSub: suffix (length - (suffix length)) 0 (suffix length))
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336 }
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337 }
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338
271
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339 jsonEncode <- {
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340 i <- 0
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341 start <- 0
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342 parts <- #["\""]
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343 q <- "\"" byte: 0
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344 s <- "\\" byte: 0
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345 while: { i < byte_length } do: {
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346 b <- byte: i
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347 if: b = q {
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348 parts append: (from: start withLength: i - start)
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349 start <- i + 1
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350 parts append: "\\\""
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351 } else: {
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352 if: b = s {
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353 parts append: (from: start withLength: i - start)
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354 start <- i + 1
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355 parts append: "\\\\"
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356 }
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357 }
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358
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359 i <- i + 1
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360 }
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361 if: start < byte_length {
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362 parts append: (from: start)
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363 }
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364 parts append: "\""
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365 parts join: ""
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366 }
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367
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368 isInteger? <- { false }
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369 isString? <- { true }
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370 isBasicString? <- { true }
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371 }