| 1 | /* |
| 2 | * ustring.c: Unicode string routines |
| 3 | */ |
| 4 | |
| 5 | #include <wchar.h> |
| 6 | #include <time.h> |
| 7 | #include "halibut.h" |
| 8 | |
| 9 | wchar_t *ustrdup(wchar_t *s) { |
| 10 | wchar_t *r; |
| 11 | if (s) { |
| 12 | r = mknewa(wchar_t, 1+ustrlen(s)); |
| 13 | ustrcpy(r, s); |
| 14 | } else { |
| 15 | r = mknew(wchar_t); |
| 16 | *r = 0; |
| 17 | } |
| 18 | return r; |
| 19 | } |
| 20 | |
| 21 | char *ustrtoa(wchar_t *s, char *outbuf, int size) { |
| 22 | char *p; |
| 23 | if (!s) { |
| 24 | *outbuf = '\0'; |
| 25 | return outbuf; |
| 26 | } |
| 27 | for (p = outbuf; *s && p < outbuf+size; p++,s++) |
| 28 | *p = *s; |
| 29 | if (p < outbuf+size) |
| 30 | *p = '\0'; |
| 31 | else |
| 32 | outbuf[size-1] = '\0'; |
| 33 | return outbuf; |
| 34 | } |
| 35 | |
| 36 | int ustrlen(wchar_t *s) { |
| 37 | int len = 0; |
| 38 | while (*s++) len++; |
| 39 | return len; |
| 40 | } |
| 41 | |
| 42 | wchar_t *uadv(wchar_t *s) { |
| 43 | return s + 1 + ustrlen(s); |
| 44 | } |
| 45 | |
| 46 | wchar_t *ustrcpy(wchar_t *dest, wchar_t *source) { |
| 47 | wchar_t *ret = dest; |
| 48 | do { |
| 49 | *dest++ = *source; |
| 50 | } while (*source++); |
| 51 | return ret; |
| 52 | } |
| 53 | |
| 54 | int ustrcmp(wchar_t *lhs, wchar_t *rhs) { |
| 55 | if (!lhs && !rhs) return 0; |
| 56 | if (!lhs) return -1; |
| 57 | if (!rhs) return +1; |
| 58 | while (*lhs && *rhs && *lhs==*rhs) |
| 59 | lhs++, rhs++; |
| 60 | if (*lhs < *rhs) |
| 61 | return -1; |
| 62 | else if (*lhs > *rhs) |
| 63 | return 1; |
| 64 | return 0; |
| 65 | } |
| 66 | |
| 67 | wchar_t utolower(wchar_t c) { |
| 68 | if (c == L'\0') |
| 69 | return c; /* this property needed by ustricmp */ |
| 70 | /* FIXME: this doesn't even come close */ |
| 71 | if (c >= 'A' && c <= 'Z') |
| 72 | c += 'a'-'A'; |
| 73 | return c; |
| 74 | } |
| 75 | |
| 76 | int ustricmp(wchar_t *lhs, wchar_t *rhs) { |
| 77 | wchar_t lc, rc; |
| 78 | while ((lc = utolower(*lhs)) == (rc = utolower(*rhs)) && lc && rc) |
| 79 | lhs++, rhs++; |
| 80 | if (!lc && !rc) |
| 81 | return 0; |
| 82 | if (lc < rc) |
| 83 | return -1; |
| 84 | else |
| 85 | return 1; |
| 86 | } |
| 87 | |
| 88 | wchar_t *ustrlow(wchar_t *s) { |
| 89 | wchar_t *p = s; |
| 90 | while (*p) { |
| 91 | *p = utolower(*p); |
| 92 | p++; |
| 93 | } |
| 94 | return s; |
| 95 | } |
| 96 | |
| 97 | int utoi(wchar_t *s) { |
| 98 | int sign = +1; |
| 99 | int n; |
| 100 | |
| 101 | if (*s == L'-') { |
| 102 | s++; |
| 103 | sign = -1; |
| 104 | } |
| 105 | |
| 106 | n = 0; |
| 107 | while (*s && *s >= L'0' && *s <= L'9') { |
| 108 | n *= 10; |
| 109 | n += (*s - '0'); |
| 110 | s++; |
| 111 | } |
| 112 | |
| 113 | return n; |
| 114 | } |
| 115 | |
| 116 | int utob(wchar_t *s) { |
| 117 | if (!ustricmp(s, L"yes") || !ustricmp(s, L"y") || |
| 118 | !ustricmp(s, L"true") || !ustricmp(s, L"t")) |
| 119 | return TRUE; |
| 120 | return FALSE; |
| 121 | } |
| 122 | |
| 123 | int uisdigit(wchar_t c) { |
| 124 | return c >= L'0' && c <= L'9'; |
| 125 | } |
| 126 | |
| 127 | #define USTRFTIME_DELTA 128 |
| 128 | wchar_t *ustrftime(wchar_t *wfmt, struct tm *timespec) { |
| 129 | void *blk = NULL; |
| 130 | wchar_t *wblk, *wp; |
| 131 | char *fmt, *text, *p; |
| 132 | size_t size = 0; |
| 133 | size_t len; |
| 134 | |
| 135 | /* |
| 136 | * strftime has the entertaining property that it returns 0 |
| 137 | * _either_ on out-of-space _or_ on successful generation of |
| 138 | * the empty string. Hence we must ensure our format can never |
| 139 | * generate the empty string. Somebody throw a custard pie at |
| 140 | * whoever was responsible for that. Please? |
| 141 | */ |
| 142 | if (wfmt) { |
| 143 | len = ustrlen(wfmt); |
| 144 | fmt = mknewa(char, 2+len); |
| 145 | ustrtoa(wfmt, fmt+1, len+1); |
| 146 | fmt[0] = ' '; |
| 147 | } else |
| 148 | fmt = " %c"; |
| 149 | |
| 150 | while (1) { |
| 151 | size += USTRFTIME_DELTA; |
| 152 | blk = resize((char *)blk, size); |
| 153 | len = strftime((char *)blk, size-1, fmt, timespec); |
| 154 | if (len > 0) |
| 155 | break; |
| 156 | } |
| 157 | |
| 158 | /* Note: +1 for the terminating 0, -1 for the initial space in fmt */ |
| 159 | wblk = resize((wchar_t *)blk, len); |
| 160 | text = mknewa(char, len); |
| 161 | strftime(text, len, fmt+1, timespec); |
| 162 | /* |
| 163 | * We operate in the C locale, so this all ought to be kosher |
| 164 | * ASCII. If we ever move outside ASCII machines, we may need |
| 165 | * to make this more portable... |
| 166 | */ |
| 167 | for (wp = wblk, p = text; *p; p++, wp++) |
| 168 | *wp = *p; |
| 169 | *wp = 0; |
| 170 | if (wfmt) |
| 171 | sfree(fmt); |
| 172 | sfree(text); |
| 173 | return wblk; |
| 174 | } |