diff options
Diffstat (limited to 'formatting.c')
| -rw-r--r-- | formatting.c | 265 |
1 files changed, 68 insertions, 197 deletions
diff --git a/formatting.c b/formatting.c index c806f4d..ac0222c 100644 --- a/formatting.c +++ b/formatting.c @@ -1,4 +1,8 @@ +/* if ever in need of formatting functions like in this file, but signed, they + * can be found wasted in the version history, commit + * f975594e55bdc05ee436bc7bdcd6e09aec5357b1. */ + #include <math.h> #include <stdlib.h> #include <string.h> @@ -7,6 +11,7 @@ #include "formatting.h" #include "minitest.h" + size_t int_charcount(int x) { size_t n = x < 0; x *= -(x < 0) * 2 + 1; @@ -22,27 +27,17 @@ size_t int_charcount(int x) { * * `unsigned int base` affects the precision. */ -exp_notated int_floored_exponent_notation_base +exp_notated ull_floored_exponent_notation_base ( - int x, + unsigned long long x, unsigned int precision, unsigned int base ) { - int original = x; - int sign = (x < 0) * -2 + 1; - x *= sign; - int i = 0; while (x >= int_pown(base, precision)) { x /= base; i++; } - x += (sign == -1) && (original != -x * int_pown(base, i)); - if (x >= int_pown(base, precision)) { - x /= base; - i++; - } - x *= sign; exp_notated res = { .mantissa = x, @@ -52,26 +47,47 @@ exp_notated int_floored_exponent_notation_base return res; } -exp_notated int_floored_exponent_notation(int x, unsigned int precision) { - return int_floored_exponent_notation_base(x, precision, 10); +exp_notated ull_floored_exponent_notation( + unsigned long long x, + unsigned int precision +) { + return ull_floored_exponent_notation_base(x, precision, 10); } -exp_notated int_ceiled_exponent_notation_base( - int x, +exp_notated ull_ceiled_exponent_notation_base( + unsigned long long x, unsigned int precision, unsigned int base ) { - exp_notated res = int_floored_exponent_notation_base(-x, precision, base); - res.mantissa = -res.mantissa; + unsigned long long original = x; + + int i = 0; + while (x >= int_pown(base, precision)) { + x /= base; + i++; + } + + if (x * ull_pown(base, i) != original) { + x += 1; + } + + exp_notated res = { + .mantissa = x, + .exponent = i, + .base = base + }; return res; } -exp_notated int_ceiled_exponent_notation(int x, unsigned int precision) { - return int_ceiled_exponent_notation_base(x, precision, 10); +exp_notated ull_ceiled_exponent_notation( + unsigned long long x, + unsigned int precision +) { + return ull_ceiled_exponent_notation_base(x, precision, 10); } -int exp_notated_to_int(exp_notated x) { - return x.mantissa * int_pown(x.base, x.exponent); +unsigned long long exp_notated_to_ull(exp_notated x) { + return x.mantissa * (unsigned long long) int_pown(x.base, x.exponent); } /* Returns the appropriate binary prefix for `exp_notated x`. `x` must have @@ -110,20 +126,20 @@ const char* binary_prefix(exp_notated x) { } /* Modifies the string pointed to by `char** res` to a string describing the - * argument `int x` floored to the appropriate multiple of 1024 followed with a - * binary prefix (Ki, Mi, Gi...). + * argument `unsigned long long x` floored to the appropriate multiple of 1024 + * followed with a binary prefix (Ki, Mi, Gi...). * * `size_t* res_bufsize` should point to a value describing the size of the * string buffer pointed to by `char** res`. Returns a negative value upon * failure in memory allocation or `snprintf`, otherwise returns the length of * `char* res`. */ -int int_floored_with_binary_prefix(char** res, size_t* res_bufsize, int x) { - exp_notated x_exp = int_floored_exponent_notation_base(x, 1, 1024); - if (x_exp.exponent > 10) { /* quebi-=1024^10 greatest defined prefix */ - x_exp.mantissa *= int_pown(1024, x_exp.exponent - 10); - x_exp.exponent = 10; - } +int ull_floored_with_binary_prefix( + char** res, + size_t* res_bufsize, + unsigned long long x +) { + exp_notated x_exp = ull_floored_exponent_notation_base(x, 1, 1024); const char* prefix = binary_prefix(x_exp); @@ -138,7 +154,7 @@ int int_floored_with_binary_prefix(char** res, size_t* res_bufsize, int x) { *res_bufsize = bufsize; } if (*res == NULL) return -1; - return snprintf(*res, *res_bufsize, "%d %s", x_exp.mantissa, prefix); + return snprintf(*res, *res_bufsize, "%llu %s", x_exp.mantissa, prefix); } /* Returns the unit prefix resembling the exponent `int x`. If there is no @@ -211,14 +227,14 @@ const char* unit_prefix(int exponent) { * failure and the length of `char* res` on success. Failure can be caused by * problems in memory allocation or failure in `snprintf`. */ -int int_floored_with_prefix( +int ull_floored_with_prefix( char** res, size_t* res_bufsize, - int x, + long long unsigned x, unsigned int precision ) { exp_notated x_exp - = int_floored_exponent_notation_base(x, precision, 10); + = ull_floored_exponent_notation_base(x, precision, 10); double mantissa = (double) x_exp.mantissa * int_pow10(x_exp.exponent % 3); unsigned int exponent = x_exp.exponent - x_exp.exponent % 3; @@ -255,9 +271,9 @@ char* test_floored_exponent_notation() { const size_t bufsize = 128; char* msg = malloc(bufsize); - exp_notated res = int_floored_exponent_notation(9489345, 3); + exp_notated res = ull_floored_exponent_notation(9489345, 3); snprintf(msg, bufsize, - "int_floored_exponent_notation(9489345, 3): expected 948*10^4, got %d*%d^%d", + "ull_floored_exponent_notation(9489345, 3): expected 948*10^4, got %d*%d^%d", res.mantissa, res.base, res.exponent ); mt_assert( @@ -266,31 +282,9 @@ char* test_floored_exponent_notation() { res.exponent == 4 , msg); - res = int_floored_exponent_notation(-88, 1); + res = ull_floored_exponent_notation_base(3145733, 1, 1024); snprintf(msg, bufsize, - "int_floored_exponent_notation(-88, 1): expected -9*10^1, got %d*%d^%d", - res.mantissa, res.base, res.exponent - ); - mt_assert( - res.mantissa == -9 && - res.base == 10 && - res.exponent == 1 - , msg); - - res = int_floored_exponent_notation(-99, 1); - snprintf(msg, bufsize, - "int_floored_exponent_notation(-99, 1): expected -1*10^2, got %d*%d^%d", - res.mantissa, res.base, res.exponent - ); - mt_assert( - res.mantissa == -1 && - res.base == 10 && - res.exponent == 2 - , msg); - - res = int_floored_exponent_notation_base(3145733, 1, 1024); - snprintf(msg, bufsize, - "int_floored_exponent_notation_base(3145733, 1, 1024): expected 3*1024^2, got %d*%d^%d", + "ull_floored_exponent_notation_base(3145733, 1, 1024): expected 3*1024^2, got %d*%d^%d", res.mantissa, res.base, res.exponent ); mt_assert( @@ -299,39 +293,6 @@ char* test_floored_exponent_notation() { res.exponent == 2 , msg); - res = int_floored_exponent_notation_base(-1022, 1, 1024); - snprintf(msg, bufsize, - "int_floored_exponent_notation(-1022, 1, 1024): expected -1022*1024^0, got %d*%d^%d", - res.mantissa, res.base, res.exponent - ); - mt_assert( - res.mantissa == -1022 && - res.base == 1024 && - res.exponent == 0 - , msg); - - res = int_floored_exponent_notation_base(-1023, 1, 1024); - snprintf(msg, bufsize, - "int_floored_exponent_notation(-1023, 1, 1024): expected -1023*1024^0, got %d*%d^%d", - res.mantissa, res.base, res.exponent - ); - mt_assert( - res.mantissa == -1023 && - res.base == 1024 && - res.exponent == 0 - , msg); - - res = int_floored_exponent_notation_base(-1024, 1, 1024); - snprintf(msg, bufsize, - "int_floored_exponent_notation(-1024, 1, 1024): expected -1*1024^1, got %d*%d^%d", - res.mantissa, res.base, res.exponent - ); - mt_assert( - res.mantissa == -1 && - res.base == 1024 && - res.exponent == 1 - , msg); - free(msg); return 0; } @@ -340,9 +301,9 @@ char* test_ceiled_exponent_notation() { const size_t bufsize = 128; char* msg = malloc(bufsize); - exp_notated res = int_ceiled_exponent_notation(9489345, 3); + exp_notated res = ull_ceiled_exponent_notation(9489345, 3); snprintf(msg, bufsize, - "int_ceiled_exponent_notation(9489345, 3): expected 949*10^4, got %d*%d^%d", + "ull_ceiled_exponent_notation(9489345, 3): expected 949*10^4, got %d*%d^%d", res.mantissa, res.base, res.exponent ); mt_assert( @@ -351,31 +312,9 @@ char* test_ceiled_exponent_notation() { res.exponent == 4 , msg); - res = int_ceiled_exponent_notation(-99, 1); - snprintf(msg, bufsize, - "int_ceiled_exponent_notation(-99, 1): expected -9*10^1, got %d*%d^%d", - res.mantissa, res.base, res.exponent - ); - mt_assert( - res.mantissa == -9 && - res.base == 10 && - res.exponent == 1 - , msg); - - res = int_ceiled_exponent_notation(-100, 1); + res = ull_ceiled_exponent_notation_base(3145733, 1, 1024); snprintf(msg, bufsize, - "int_ceiled_exponent_notation(-100, 1): expected -1*10^2, got %d*%d^%d", - res.mantissa, res.base, res.exponent - ); - mt_assert( - res.mantissa == -1 && - res.base == 10 && - res.exponent == 2 - , msg); - - res = int_ceiled_exponent_notation_base(3145733, 1, 1024); - snprintf(msg, bufsize, - "int_ceiled_exponent_notation_base(3145733, 1, 1024): expected 4*1024^2, got %d*%d^%d", + "ull_ceiled_exponent_notation_base(3145733, 1, 1024): expected 4*1024^2, got %d*%d^%d", res.mantissa, res.base, res.exponent ); mt_assert( @@ -384,39 +323,17 @@ char* test_ceiled_exponent_notation() { res.exponent == 2 , msg); - res = int_ceiled_exponent_notation_base(-1023, 1, 1024); - snprintf(msg, bufsize, - "int_ceiled_exponent_notation(-1023, 1, 1024): expected -1023*1024^0, got %d*%d^%d", - res.mantissa, res.base, res.exponent - ); - mt_assert( - res.mantissa == -1023 && - res.base == 1024 && - res.exponent == 0 - , msg); - - res = int_ceiled_exponent_notation_base(-1024, 1, 1024); - snprintf(msg, bufsize, - "int_ceiled_exponent_notation(-1024, 1, 1024): expected -1*1024^1, got %d*%d^%d", - res.mantissa, res.base, res.exponent - ); - mt_assert( - res.mantissa == -1 && - res.base == 1024 && - res.exponent == 1 - , msg); - free(msg); return 0; } -char* test_exponent_notated_to_int() { +char* test_exponent_notated_to_ull() { exp_notated x = { .mantissa = 3, .exponent = 2, .base = 10 }; - mt_assert_eq(300, exp_notated_to_int(x)); + mt_assert_eq(300, exp_notated_to_ull(x)); return 0; } @@ -426,7 +343,7 @@ char* test_floored_with_binary_prefix() { size_t res_bufsize = 2; char* res = malloc(res_bufsize); - int_floored_with_binary_prefix( + ull_floored_with_binary_prefix( &res, &res_bufsize, 1026 @@ -437,29 +354,7 @@ char* test_floored_with_binary_prefix() { "1 Ki" ) == 0, msg); - int_floored_with_binary_prefix( - &res, - &res_bufsize, - -1023 - ); - snprintf(msg, bufsize, "-1023 yielded `%s` instead of `-1023`", res); - mt_assert(strcmp( - res, - "-1023 " - ) == 0, msg); - - int_floored_with_binary_prefix( - &res, - &res_bufsize, - -1026 - ); - snprintf(msg, bufsize, "-1026 yielded `%s` instead of `-2 Ki`", res); - mt_assert(strcmp( - res, - "-2 Ki" - ) == 0, msg); - - int_floored_with_binary_prefix( + ull_floored_with_binary_prefix( &res, &res_bufsize, 1049088 @@ -470,7 +365,7 @@ char* test_floored_with_binary_prefix() { "1 Mi" ) == 0, msg); - int_floored_with_binary_prefix( + ull_floored_with_binary_prefix( &res, &res_bufsize, 5243392 @@ -493,7 +388,7 @@ char* test_floored_with_prefix() { size_t res_bufsize = 2; char* res = malloc(res_bufsize); - int_floored_with_prefix( + ull_floored_with_prefix( &res, &res_bufsize, 1001, @@ -505,7 +400,7 @@ char* test_floored_with_prefix() { "1.00 k" ) == 0, msg); - int_floored_with_prefix( + ull_floored_with_prefix( &res, &res_bufsize, 300, @@ -517,31 +412,7 @@ char* test_floored_with_prefix() { "300 " ) == 0, msg); - int_floored_with_prefix( - &res, - &res_bufsize, - -999, - 3 - ); - snprintf(msg, bufsize, "-999 yielded `%s` instead of `-999 `", res); - mt_assert(strcmp( - res, - "-999 " - ) == 0, msg); - - int_floored_with_prefix( - &res, - &res_bufsize, - -1026, - 3 - ); - snprintf(msg, bufsize, "-1021 yielded `%s` instead of `-1.03 k`", res); - mt_assert(strcmp( - res, - "-1.03 k" - ) == 0, msg); - - int_floored_with_prefix( + ull_floored_with_prefix( &res, &res_bufsize, 1000000, @@ -553,7 +424,7 @@ char* test_floored_with_prefix() { "1.0 M" ) == 0, msg); - int_floored_with_prefix( + ull_floored_with_prefix( &res, &res_bufsize, 5243392, @@ -587,7 +458,7 @@ void formatting_tests() { mt_run_test(test_int_charcount); mt_run_test(test_floored_exponent_notation); mt_run_test(test_ceiled_exponent_notation); - mt_run_test(test_exponent_notated_to_int); + mt_run_test(test_exponent_notated_to_ull); mt_run_test(test_floored_with_binary_prefix); mt_run_test(test_floored_with_prefix); } |