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|00001b00| 61 73 20 61 74 20 6d 6f | 73 74 0a 58 09 20 20 20 |as at mo|st.X.   |
|00001b10| 20 34 35 20 64 69 67 69 | 74 73 20 69 6e 20 69 74 | 45 digi|ts in it|
|00001b20| 2c 20 61 6e 64 20 6c 65 | 66 74 6f 76 65 72 20 69 |, and le|ftover i|
|00001b30| 73 20 61 74 20 6c 65 61 | 73 74 20 31 36 20 63 68 |s at lea|st 16 ch|
|00001b40| 61 72 61 63 74 65 72 73 | 2e 0a 58 09 2a 2f 0a 58 |aracters|..X.*/.X|
|00001b50| 09 73 61 76 65 20 3d 20 | 73 70 2c 20 65 78 70 74 |.save = |sp, expt|
|00001b60| 20 3d 20 30 2c 20 65 73 | 69 67 6e 20 3d 20 31 3b | = 0, es|ign = 1;|
|00001b70| 0a 58 09 64 6f 20 7b 0a | 58 09 20 20 20 20 63 20 |.X.do {.|X.    c |
|00001b80| 3d 20 2a 73 70 2b 2b 3b | 0a 58 09 20 20 20 20 69 |= *sp++;|.X.    i|
|00001b90| 66 20 28 63 20 21 3d 20 | 27 65 27 20 26 26 20 63 |f (c != |'e' && c|
|00001ba0| 20 21 3d 20 27 45 27 29 | 20 62 72 65 61 6b 3b 0a | != 'E')| break;.|
|00001bb0| 58 09 20 20 20 20 63 20 | 3d 20 2a 73 70 2b 2b 3b |X.    c |= *sp++;|
|00001bc0| 0a 58 09 20 20 20 20 69 | 66 20 28 63 20 3d 3d 20 |.X.    i|f (c == |
|00001bd0| 27 2d 27 29 20 65 73 69 | 67 6e 20 2d 3d 20 32 2c |'-') esi|gn -= 2,|
|00001be0| 20 63 20 3d 20 2a 73 70 | 2b 2b 3b 20 65 6c 73 65 | c = *sp|++; else|
|00001bf0| 0a 58 09 20 20 20 20 69 | 66 20 28 63 20 3d 3d 20 |.X.    i|f (c == |
|00001c00| 27 2b 27 20 7c 7c 20 63 | 20 3d 3d 20 27 20 27 29 |'+' || c| == ' ')|
|00001c10| 20 63 20 3d 20 2a 73 70 | 2b 2b 3b 0a 58 09 20 20 | c = *sp|++;.X.  |
|00001c20| 20 20 69 66 20 28 28 75 | 6e 73 69 67 6e 65 64 29 |  if ((u|nsigned)|
|00001c30| 28 63 2d 27 30 27 29 20 | 3e 20 28 75 6e 73 69 67 |(c-'0') |> (unsig|
|00001c40| 6e 65 64 29 28 27 39 27 | 2d 27 30 27 29 29 20 62 |ned)('9'|-'0')) b|
|00001c50| 72 65 61 6b 3b 0a 58 09 | 20 20 20 20 77 68 69 6c |reak;.X.|    whil|
|00001c60| 65 20 28 63 20 3d 3d 20 | 27 30 27 29 20 63 20 3d |e (c == |'0') c =|
|00001c70| 20 2a 73 70 2b 2b 3b 0a | 58 09 20 20 20 20 66 6f | *sp++;.|X.    fo|
|00001c80| 72 20 28 3b 20 28 75 6e | 73 69 67 6e 65 64 29 28 |r (; (un|signed)(|
|00001c90| 63 2d 27 30 27 29 20 3c | 3d 20 28 75 6e 73 69 67 |c-'0') <|= (unsig|
|00001ca0| 6e 65 64 29 28 27 39 27 | 2d 27 30 27 29 3b 20 63 |ned)('9'|-'0'); c|
|00001cb0| 20 3d 20 2a 73 70 2b 2b | 29 0a 58 09 09 65 78 70 | = *sp++|).X..exp|
|00001cc0| 74 20 3d 20 65 78 70 74 | 2a 31 30 20 2b 20 63 2d |t = expt|*10 + c-|
|00001cd0| 27 30 27 3b 09 20 20 20 | 20 0a 58 09 20 20 20 20 |'0';.   | .X.    |
|00001ce0| 69 66 20 28 65 73 69 67 | 6e 20 3c 20 30 29 20 65 |if (esig|n < 0) e|
|00001cf0| 78 70 74 20 3d 20 2d 65 | 78 70 74 3b 0a 58 09 20 |xpt = -e|xpt;.X. |
|00001d00| 20 20 20 73 61 76 65 20 | 3d 20 73 70 2d 31 3b 0a |   save |= sp-1;.|
|00001d10| 58 09 7d 20 77 68 69 6c | 65 20 28 30 29 3b 0a 58 |X.} whil|e (0);.X|
|00001d20| 09 69 66 20 28 70 74 72 | 29 20 2a 70 74 72 20 3d |.if (ptr|) *ptr =|
|00001d30| 20 73 61 76 65 3b 0a 58 | 09 65 78 70 74 20 2b 3d | save;.X|.expt +=|
|00001d40| 20 73 63 61 6c 65 3b 0a | 58 09 2f 2a 20 20 4e 6f | scale;.|X./*  No|
|00001d50| 77 20 74 68 65 20 6e 75 | 6d 62 65 72 20 69 73 20 |w the nu|mber is |
|00001d60| 73 69 67 6e 2a 30 2e 66 | 72 61 63 74 69 6f 6e 2a |sign*0.f|raction*|
|00001d70| 31 30 2a 2a 65 78 70 74 | 20 20 2a 2f 0a 58 09 65 |10**expt|  */.X.e|
|00001d80| 72 72 6e 6f 20 3d 20 45 | 52 41 4e 47 45 3b 0a 58 |rrno = E|RANGE;.X|
|00001d90| 09 69 66 20 28 65 78 70 | 74 20 3e 20 4d 44 4d 41 |.if (exp|t > MDMA|
|00001da0| 58 45 58 50 54 29 20 7b | 0a 58 09 20 20 20 20 72 |XEXPT) {|.X.    r|
|00001db0| 65 74 75 72 6e 20 48 55 | 47 45 2a 73 69 67 6e 3b |eturn HU|GE*sign;|
|00001dc0| 0a 58 09 7d 20 65 6c 73 | 65 0a 58 09 69 66 20 28 |.X.} els|e.X.if (|
|00001dd0| 65 78 70 74 20 3d 3d 20 | 4d 44 4d 41 58 45 58 50 |expt == |MDMAXEXP|
|00001de0| 54 29 20 7b 0a 58 09 20 | 20 20 20 69 66 20 28 73 |T) {.X. |   if (s|
|00001df0| 74 72 63 6d 70 28 62 75 | 66 6f 72 67 2c 20 4d 44 |trcmp(bu|forg, MD|
|00001e00| 4d 41 58 46 52 41 43 29 | 20 3e 20 30 29 20 72 65 |MAXFRAC)| > 0) re|
|00001e10| 74 75 72 6e 20 48 55 47 | 45 2a 73 69 67 6e 3b 0a |turn HUG|E*sign;.|
|00001e20| 58 09 7d 20 65 6c 73 65 | 0a 58 09 69 66 20 28 65 |X.} else|.X.if (e|
|00001e30| 78 70 74 20 3c 20 4d 44 | 4d 49 4e 45 58 50 54 29 |xpt < MD|MINEXPT)|
|00001e40| 20 7b 0a 58 09 20 20 20 | 20 72 65 74 75 72 6e 20 | {.X.   | return |
|00001e50| 5a 45 52 4f 2a 73 69 67 | 6e 3b 0a 58 09 7d 20 65 |ZERO*sig|n;.X.} e|
|00001e60| 6c 73 65 0a 58 09 69 66 | 20 28 65 78 70 74 20 3d |lse.X.if| (expt =|
|00001e70| 3d 20 4d 44 4d 49 4e 45 | 58 50 54 29 20 7b 0a 58 |= MDMINE|XPT) {.X|
|00001e80| 09 20 20 20 20 69 66 20 | 28 73 74 72 63 6d 70 28 |.    if |(strcmp(|
|00001e90| 62 75 66 6f 72 67 2c 20 | 4d 44 4d 49 4e 46 52 41 |buforg, |MDMINFRA|
|00001ea0| 43 29 20 3c 20 30 29 20 | 72 65 74 75 72 6e 20 5a |C) < 0) |return Z|
|00001eb0| 45 52 4f 2a 73 69 67 6e | 3b 0a 58 09 7d 0a 58 09 |ERO*sign|;.X.}.X.|
|00001ec0| 2f 2a 20 20 57 65 20 68 | 61 76 65 20 6e 6f 77 20 |/*  We h|ave now |
|00001ed0| 65 73 74 61 62 6c 69 73 | 68 65 64 20 74 68 61 74 |establis|hed that|
|00001ee0| 20 74 68 65 20 6e 75 6d | 62 65 72 20 63 61 6e 20 | the num|ber can |
|00001ef0| 62 65 20 20 2a 2f 0a 58 | 09 2f 2a 20 20 72 65 70 |be  */.X|./*  rep|
|00001f00| 72 65 73 65 6e 74 65 64 | 20 77 69 74 68 6f 75 74 |resented| without|
|00001f10| 20 6f 76 65 72 66 6c 6f | 77 20 6f 72 20 75 6e 64 | overflo|w or und|
|00001f20| 65 72 66 6c 6f 77 20 20 | 2a 2f 0a 58 09 28 76 6f |erflow  |*/.X.(vo|
|00001f30| 69 64 29 20 73 70 72 69 | 6e 74 66 28 64 70 2c 20 |id) spri|ntf(dp, |
|00001f40| 22 45 25 64 22 2c 20 65 | 78 70 74 29 3b 0a 58 09 |"E%d", e|xpt);.X.|
|00001f50| 65 72 72 6e 6f 20 3d 20 | 30 3b 0a 58 09 72 65 74 |errno = |0;.X.ret|
|00001f60| 75 72 6e 20 61 74 6f 66 | 28 62 75 66 66 65 72 29 |urn atof|(buffer)|
|00001f70| 2a 73 69 67 6e 3b 0a 58 | 20 20 20 20 7d 0a 58 0a |*sign;.X|    }.X.|
|00001f80| 2d 2d 2d 2d 2d 2d 20 45 | 4f 46 20 2d 2d 2d 2d 2d |------ E|OF -----|
|00001f90| 2d 0a 6c 73 20 2d 6c 20 | 73 74 72 32 64 62 6c 2e |-.ls -l |str2dbl.|
|00001fa0| 63 0a 65 78 69 74 20 30 | 0a                      |c.exit 0|.       |
+--------+-------------------------+-------------------------+--------+--------+