| 1 | /* depend: */ |
| 2 | /* cflags: */ |
| 3 | /* linker: atoi.o debug.o fdprintf.o parser.o -lm */ |
| 4 | |
| 5 | //#include <malloc.h> |
| 6 | #include <stddef.h> |
| 7 | #include <stdio.h> |
| 8 | #include <unistd.h> |
| 9 | |
| 10 | #include "atoi.h" |
| 11 | #include "debug.h" |
| 12 | #include "fdprintf.h" |
| 13 | #include "parser.h" |
| 14 | |
| 15 | /* constants */ |
| 16 | |
| 17 | //#define BUFFER_SIZE 4096 |
| 18 | #define BUFFER_SIZE 256 |
| 19 | |
| 20 | /* macros */ |
| 21 | |
| 22 | #define CEIL(x, y) (((x) + (y) - 1) / (y)) |
| 23 | #define MIN(x, y) (((x) < (y)) ? (x) : (y)) |
| 24 | #define MAX(x, y) (((x) > (y)) ? (x) : (y)) |
| 25 | |
| 26 | /* gobal variables */ |
| 27 | |
| 28 | char *progname = NULL; |
| 29 | |
| 30 | /* help function */ |
| 31 | |
| 32 | int usage (int ret) |
| 33 | { |
| 34 | int fd = ret ? stdfderr : stdfdout; |
| 35 | fdprintf (fd, "usage: %s\n", progname); |
| 36 | fdprintf (fd, " -h : help message\n"); |
| 37 | fdprintf (fd, " -v : verbose level (%d)\n", verbose); |
| 38 | |
| 39 | return ret; |
| 40 | } |
| 41 | |
| 42 | /* main function */ |
| 43 | |
| 44 | int main (int argc, char *argv[]) |
| 45 | { |
| 46 | char buffer[BUFFER_SIZE + 1] = {0}; |
| 47 | char *pt = buffer; |
| 48 | int i = 0, j = 0, n; |
| 49 | int ret = 0; |
| 50 | |
| 51 | /* program name */ |
| 52 | |
| 53 | progname = argv[0]; |
| 54 | while (progname[i] != '\0') { |
| 55 | if ((progname[i] == '/') || (progname[i] == '\\')) { |
| 56 | progname += i + 1; |
| 57 | i = 0; |
| 58 | } else { |
| 59 | i++; |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | /* argument processing */ |
| 64 | |
| 65 | while (argc-- > 1) { |
| 66 | char *arg = *(++argv); |
| 67 | if (arg[0] != '-') { |
| 68 | PRINTERR ("%s: invalid option -- %s\n", progname, arg); |
| 69 | return usage (1); |
| 70 | } |
| 71 | char c = arg[1]; |
| 72 | switch (c) { |
| 73 | case 'v': |
| 74 | arg = (arg[2]) ? arg + 2 : (--argc > 0) ? *(++argv) : NULL; |
| 75 | if (arg == NULL) { |
| 76 | PRINTERR ("%s: missing verbose level\n", progname); |
| 77 | return usage (1); |
| 78 | } |
| 79 | verbose = atoi (arg); |
| 80 | break; |
| 81 | case 'h': |
| 82 | default: |
| 83 | return usage (c != 'h'); |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | /* read from input stream */ |
| 88 | |
| 89 | while ((n = read (stdfdin, pt, BUFFER_SIZE - (pt - buffer))) != 0) { |
| 90 | VERBOSE (INFO, PRINTOUT ("read %d bytes\n", n)); |
| 91 | n += (pt - buffer); |
| 92 | if ((n == 2) && (buffer[0] == '.')) { |
| 93 | return 0; |
| 94 | } |
| 95 | |
| 96 | /* look for end of line */ |
| 97 | for (i = 0, j = 0; i < n; i++) { |
| 98 | if (buffer[i] == '\n') { |
| 99 | buffer[i] = 0; |
| 100 | VERBOSE (INFO, PRINTOUT ("line(%d): %s\n", j, buffer + j)); |
| 101 | element_t *element = parser (buffer, NULL, 0); |
| 102 | if (element == (void *)(-1)) { |
| 103 | VERBOSE (WARNING, PRINTOUT ("error while parsing: %s\n", buffer)); |
| 104 | ret = 1; |
| 105 | } else { |
| 106 | VERBOSE (INFO, print_element (element, 0)); |
| 107 | PRINTOUT ("=> %f\n", evaluate_element (element)); |
| 108 | ret = 0; |
| 109 | } |
| 110 | //fsync (stdfdout); |
| 111 | j = i + 1; |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | /* keep remainding */ |
| 116 | if (j < n) { |
| 117 | for (i = 0; i < n - j; i++) { |
| 118 | buffer[i] = buffer[i + j]; |
| 119 | } |
| 120 | pt = buffer + n - j; |
| 121 | for (i = n - j; i < BUFFER_SIZE; i++) { |
| 122 | buffer[i] = 0; |
| 123 | } |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | return ret; |
| 128 | } |
| 129 | |
| 130 | // test: calc.exe -h |
| 131 | // test: calc.exe -h | awk '/usage:/ { rc=1 } END { exit (1-rc) }' |
| 132 | // test: calc.exe -_ 2> /dev/null | awk 'END { if (NR == 0) { exit(0) } else exit (1) }' |
| 133 | // test: calc.exe -_ 2>&1 | awk '/usage:/ { rc=1 } END { exit (1-rc) }' |
| 134 | // test: echo "1 + 2" | calc.exe | grep -q '=> 3' |
| 135 | // test: echo "1 - 2" | calc.exe | grep -q '=> -1' |
| 136 | // test: echo "2 * 3" | calc.exe | grep -q '=> 6' |
| 137 | // test: echo "1 / 2" | calc.exe | grep -q '=> 5e-1' |
| 138 | // test: echo "2 ^ 3" | calc.exe | grep -q '=> 8' |
| 139 | // test: echo "1e-1 + 2.34e3" | calc.exe | grep -q '=> 2.3401' |
| 140 | // test: echo "sqrt (2)" | calc.exe | grep -q '=> 1.414213' |
| 141 | // test: echo "pow (2, 3)" | calc.exe | grep -q '=> 8' |
| 142 | // test: echo "cos (2)" | calc.exe | grep -q '=> -4.161468e-1' |
| 143 | // test: echo "sin (2)" | calc.exe | grep -q '=> 9.092974e-1' |
| 144 | // test: echo "atan (2)" | calc.exe | grep -q '=> 1.107148' |
| 145 | // test: echo "exp (2)" | calc.exe | grep -q '=> 7.389056' |
| 146 | // test: echo "log (2)" | calc.exe | grep -q '=> 6.931471e-1' |
| 147 | // test: echo "2 + 3 - 4" | calc.exe | grep -q '=> 1' |
| 148 | // test: echo "1 + cos (2 - 3)" | calc.exe | grep -q '=> 1.54030' |
| 149 | // test: echo "cos (1 / 2) * 3" | calc.exe | grep -q '=> 2.63274' |
| 150 | // test: echo "1 + 4 * (2 - 3)" | calc.exe | grep -q '=> -3' |
| 151 | // test: echo "(2 - 3) / 4" | calc.exe | grep -q '=> -2.5e-1' |
| 152 | // test: echo "pow (8 - 3, 4 / 3)" | calc.exe | grep -q '=> 8.549879' |
| 153 | // test: echo "1 + -2" | calc.exe | grep -q '=> -1' |
| 154 | // test: echo "1 - +2" | calc.exe | grep -q '=> -1' |
| 155 | // test: echo "-1 + +2" | calc.exe | grep -q '=> 1' |
| 156 | // test: echo "-1+2" | calc.exe | grep -q '=> 1' |
| 157 | // test: echo "1-2" | calc.exe | grep -q '=> -1' |
| 158 | // test: echo "1 * 2 / 3 + 4" | calc.exe | grep -q '=> 4.666666' |
| 159 | // test: echo "2 ^ 3 * 4 + 5" | calc.exe | grep -q '=> 3.7e1' |
| 160 | // test: echo "2 + 3 * 4 ^ 5" | calc.exe | grep -q '=> 3.074e3' |
| 161 | // test: echo "2 ^ 3 * 4 + cos(5/6)" | calc.exe | grep -q '=> 3.267241e1' |
| 162 | |
| 163 | /* vim: set ts=4 sw=4 et: */ |