1.1 --- a/src/printf.c Tue Jan 16 23:12:43 2024 +0100
1.2 +++ b/src/printf.c Tue Jan 16 23:13:01 2024 +0100
1.3 @@ -127,3 +127,73 @@
1.4 return s;
1.5 }
1.6
1.7 +int cx_sprintf_a(CxAllocator *alloc, char **str, size_t len, const char *fmt, ... ) {
1.8 + va_list ap;
1.9 + va_start(ap, fmt);
1.10 + int ret = cx_vsprintf_a(alloc, str, len, fmt, ap);
1.11 + va_end(ap);
1.12 + return ret;
1.13 +}
1.14 +
1.15 +int cx_vsprintf_a(CxAllocator *alloc, char **str, size_t len, const char *fmt, va_list ap) {
1.16 + va_list ap2;
1.17 + va_copy(ap2, ap);
1.18 + int ret = vsnprintf(*str, len, fmt, ap);
1.19 + if (ret < 0 || ((unsigned)ret) < len) {
1.20 + va_end(ap2);
1.21 + return ret;
1.22 + } else {
1.23 + unsigned newlen = ret + 1;
1.24 + char *ptr = cxRealloc(alloc, *str, newlen);
1.25 + if (ptr) {
1.26 + int newret = vsnprintf(ptr, newlen, fmt, ap2);
1.27 + va_end(ap2);
1.28 + if (newret < 0) {
1.29 + cxFree(alloc, ptr);
1.30 + return ret;
1.31 + } else {
1.32 + *str = ptr;
1.33 + return newret;
1.34 + }
1.35 + } else {
1.36 + va_end(ap2);
1.37 + return ret;
1.38 + }
1.39 + }
1.40 +}
1.41 +
1.42 +int cx_sprintf_sa(CxAllocator *alloc, char *buf, size_t len, char **str, const char *fmt, ... ) {
1.43 + va_list ap;
1.44 + va_start(ap, fmt);
1.45 + int ret = cx_vsprintf_sa(alloc, buf, len, str, fmt, ap);
1.46 + va_end(ap);
1.47 + return ret;
1.48 +}
1.49 +
1.50 +int cx_vsprintf_sa(CxAllocator *alloc, char *buf, size_t len, char **str, const char *fmt, va_list ap) {
1.51 + va_list ap2;
1.52 + va_copy(ap2, ap);
1.53 + int ret = vsnprintf(buf, len, fmt, ap);
1.54 + *str = buf;
1.55 + if (ret < 0 || ((unsigned)ret) < len) {
1.56 + va_end(ap2);
1.57 + return ret;
1.58 + } else {
1.59 + unsigned newlen = ret + 1;
1.60 + char *ptr = cxMalloc(alloc, newlen);
1.61 + if (ptr) {
1.62 + int newret = vsnprintf(ptr, newlen, fmt, ap2);
1.63 + va_end(ap2);
1.64 + if (newret < 0) {
1.65 + cxFree(alloc, ptr);
1.66 + return ret;
1.67 + } else {
1.68 + *str = ptr;
1.69 + return newret;
1.70 + }
1.71 + } else {
1.72 + va_end(ap2);
1.73 + return ret;
1.74 + }
1.75 + }
1.76 +}
