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Add string precision and width (experimental)

This commit is contained in:
gingerBill 2016-05-11 00:47:05 +01:00
parent a80a71284e
commit 6948a29196
2 changed files with 23 additions and 8 deletions
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2
README.md
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@ -4,7 +4,7 @@ gb single-file public domain libraries for C & C++
library | latest version | category | description
----------------|----------------|----------|-------------
**gb.h** | 0.10c | misc | A helper library for C & C++
**gb.h** | 0.11a | misc | A helper library for C & C++
**gb_math.h** | 0.06c | math | A C/C++ vector math library geared towards game development
**gb_gl.h** | 0.04b | graphics | A C/C++ OpenGL Helper Library
**gb_string.h** | 0.95 | strings | A better string library for C & C++ (this is built into gb.h too with custom allocator support!)

29
gb.h
View File

@ -1,4 +1,4 @@
/* gb.h - v0.11 - Ginger Bill's C Helper Library - public domain
/* gb.h - v0.11a - Ginger Bill's C Helper Library - public domain
- no warranty implied; use at your own risk
This is a single header file with a bunch of useful stuff
@ -26,6 +26,7 @@ Conventions used:
Version History:
0.11a - Add string precision and width (experimental)
0.11 - Started making stdio & stdlib optional (Not tested much)
0.10c - Fix gb_endian_swap32()
0.10b - Probable timing bug for gb_time_now()
@ -2005,9 +2006,14 @@ typedef struct {
gb_internal isize
gb__print_string(char *text, isize max_len, gb__FmtInfo *info, char const *string)
{
/* TODO(bill): Get precision and width to work correctly
* How does it actually work?!
*/
isize len = 0;
isize str_len = gb_strlen(string);
isize precision = str_len;
if (info && info->width && info->width > gb_strlen(string)) {
if (info && info->width && info->width > str_len) {
char fill = info->pad_zeroes ? '0' : ' ';
isize width = info->width - gb_strlen(string);
while (width-- > 0 && max_len > 0) {
@ -2016,7 +2022,9 @@ gb__print_string(char *text, isize max_len, gb__FmtInfo *info, char const *strin
}
}
len += gb_strlcpy(text, string, max_len);
if (info && info->precision > 0) precision = gb_min(info->precision, precision);
len += gb_strlcpy(text, string, gb_min(max_len, precision));
if (info) {
if (info->force_case == GB__LETTER_CASE_UPPER)
@ -2026,7 +2034,6 @@ gb__print_string(char *text, isize max_len, gb__FmtInfo *info, char const *strin
}
return len;
}
gb_internal isize
@ -2143,7 +2150,7 @@ gb__print_f64(char *text, isize max_len, gb__FmtInfo *info, f64 arg)
gb_no_inline isize
gb_snprintf_va(char *text, isize max_len, char const *fmt, va_list va)
{
#if !defined(GB_NO_STDIO)
#if 0 && !defined(GB_NO_STDIO)
i32 res;
#if defined(_WIN32)
res = _vsnprintf(text, max_len, fmt, va);
@ -2186,13 +2193,21 @@ gb_snprintf_va(char *text, isize max_len, char const *fmt, va_list va)
if (*fmt >= '0' && *fmt <= '9')
info.width = gb_str_to_i64(fmt, cast(char **)&fmt, 0);
if (*fmt == '*') {
info.width = cast(isize)va_arg(va, int);
if (fmt[1] == '.') fmt++;
}
if (*fmt == '.') {
fmt++;
if (*fmt >= '0' && *fmt <= '9')
if (*fmt >= '0' && *fmt <= '9') {
info.precision = cast(i32)gb_str_to_i64(fmt, cast(char **)&fmt, 0);
else
} else if (*fmt == '*') {
info.precision = cast(i32)va_arg(va, int);
} else {
info.precision = 0;
}
fmt++;
}
while (!finish_parse) {