Mercurial > sos > sos
annotate src/std.c @ 3:0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Yeah, I really should have done this in seperate commits...
My mistake in operations.h was fixed, the name table is now defined in
operations.c
All operations have been modified to start with op_ so I can identify
the functions easier
Functions ftoa and atof were defined (their functions are kind of obvious)
Functions ftoa and itoa now return the location of the string they create
iPrint was removed, it was useless
The function append was created, it appends two strings
| author | Jonathan Pevarnek <pevarnj@gmail.com> |
|---|---|
| date | Tue, 01 Mar 2011 23:33:51 -0500 |
| parents | b6182f00de82 |
| children | 90cd3d9a6ca3 |
| rev | line source |
|---|---|
|
3
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
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1 #include <std.h> |
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0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
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2 |
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0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
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3 char* itoa(int n, char *a) |
| 2 | 4 { |
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3
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
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5 char *ret = a; |
| 2 | 6 if(n < 0) { |
| 7 *a++ = '-'; | |
| 8 n *= -1; | |
| 9 } | |
| 10 char *b = a; | |
| 11 if(!n) *b++ = '0'; | |
| 12 for(; n; b++) { | |
| 13 *b = n%10 + '0'; | |
| 14 n = n/10; | |
| 15 } | |
| 16 *b-- = '\0'; | |
| 17 for(; a < b; a++, b--) { //reverse | |
| 18 char temp = *b; | |
| 19 *b = *a; | |
| 20 *a = temp; | |
| 21 } | |
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3
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
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22 return ret; |
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0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
23 } |
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0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
24 |
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0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
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25 char* ftoa(double x, char *a, unsigned int prec) |
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0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
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26 { |
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0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
27 char *ret = a; |
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0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
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28 int n = (int) x; //integer part |
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0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
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29 double d = x - (double) n; //fractional part; |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
30 itoa(n, a); |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
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31 if(prec) { |
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0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
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32 while(*a && *++a); |
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0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
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33 int i; |
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0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
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34 *a++ = '.'; |
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0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
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35 for(i = 0; i < prec; i++) { |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
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36 d = d*10; |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
37 *a++ = ((int) d) + '0'; |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
38 d -= (int) d; |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
39 } |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
40 *a = '\0'; |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
41 } |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
42 return ret; |
| 2 | 43 } |
| 44 | |
| 45 int atoi(char *a) | |
| 46 { | |
| 47 int neg = 0; | |
| 48 int n = 0; | |
| 49 if(*a == '-') { | |
| 50 neg = 1; | |
| 51 a++; | |
| 52 } | |
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3
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
53 while(*a >= '0' && *a <= '9') |
| 2 | 54 n = n*10 + (*a++ - '0'); |
| 55 if(neg) n *= -1; | |
| 56 return n; | |
| 57 } | |
| 58 | |
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3
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
59 double atof(char *a) |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
60 { |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
61 int n = atoi(a); |
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0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
62 double x = 0; |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
63 double dec = .1; |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
64 while(*a++ != '.'); |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
65 while(*a != '\0') { |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
66 x += (*a - '0')*dec; |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
67 dec *= .1; |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
68 a++; |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
69 } |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
70 return n + x; |
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0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
71 } |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
72 |
| 2 | 73 void sPrint(char *a) |
| 74 { | |
| 75 char *b = a; | |
| 76 while(*b && *++b); | |
| 77 putline(a, b - a); | |
| 78 } | |
| 79 | |
|
3
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
80 int strcmp(const char *a, const char *b) |
| 2 | 81 { |
| 82 while(1) { | |
| 83 if(*a - *b) return *a - *b; | |
| 84 if(*a == '\0') return 0; | |
| 85 a++; | |
| 86 b++; | |
| 87 } | |
| 88 return -1; | |
| 89 } | |
| 90 | |
| 91 void sGet(char *a, unsigned int n) //TODO bug Jeff about getline | |
| 92 { | |
| 93 int length = getline(a, n); | |
| 94 a[(length < n)?length:n - 1] = '\0'; | |
| 95 } | |
| 96 | |
| 97 int arrayLookup(char *text, const char array[][10], int last) | |
| 98 { | |
| 99 int i; | |
| 100 for(i = 0; i < last; i++) | |
| 101 if(!strcmp(array[i], text)) return i; | |
| 102 return last; | |
| 103 } | |
|
3
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
104 |
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0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
105 char* append(char *dest, char *src) |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
106 { |
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0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
107 char *ret = dest; |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
108 while(*dest&& *++dest); //get to null in first string |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
109 while((*dest++ = *src++)); |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
110 return ret; |
|
0aa0ad9e1cc3
Converted to work with doubles instead of ints (and other changes)
Jonathan Pevarnek <pevarnj@gmail.com>
parents:
2
diff
changeset
|
111 } |