Mercurial > libanimone
annotate src/util.cc @ 30:a76e55e098d1
util: rewrite functions in C-ish
there are C++ bindings still put in place. the code should be valid
C, except for the use of <regex>, which ought to go anyway. eventually
I'll actually *test* this stuff aside from the TrimRight crap
| author | Paper <paper@tflc.us> |
|---|---|
| date | Sun, 09 Feb 2025 23:18:57 -0500 |
| parents | 27b988a1048c |
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| rev | line source |
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27b988a1048c
*: convert all files CRLF -> LF
Paper <paper@paper.us.eu.org>
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1 #include "animone/util.h" |
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*: convert all files CRLF -> LF
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2 |
| 30 | 3 #include <string.h> |
| 4 | |
| 5 #include <regex> // FIXME use a C library for this | |
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6 |
| 30 | 7 int animone_internal_util_ReadFile(const char *path, char **data, size_t *size) |
| 8 { | |
| 9 // whatever | |
| 10 size_t sz_local; | |
| 11 if (!size) | |
| 12 size = &sz_local; | |
| 13 | |
| 14 FILE *f = fopen(path, "r"); | |
| 15 if (!f) | |
| 16 return 0; | |
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17 |
| 30 | 18 fseek(f, 0, SEEK_END); |
| 19 long end = ftell(f); | |
| 20 if (end < 0) | |
| 21 return 0; | |
| 22 fseek(f, 0, SEEK_SET); | |
| 23 | |
| 24 *size = end; | |
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25 |
| 30 | 26 if (data) { |
| 27 // add a NUL terminator anyway | |
| 28 *data = (char *)malloc(end + 1); | |
| 29 if (!*data) { | |
| 30 *size = 0; | |
| 31 return 0; | |
| 32 } | |
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33 |
| 30 | 34 *size = fread(*data, 1, *size, f); |
| 35 (*data)[*size] = '\0'; | |
| 36 } | |
| 37 | |
| 38 return 1; | |
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39 } |
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40 |
| 30 | 41 static inline unsigned char _animone_internal_tolower(unsigned char c) |
| 42 { | |
| 43 return (c >= 'A' && c <= 'Z') ? (c | 0x20) : c; | |
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44 } |
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45 |
| 30 | 46 /* this is, in essence, strcasecmp. */ |
| 47 int animone_internal_util_EqualStrings(const char *str1, const char *str2) | |
| 48 { | |
| 49 unsigned char c1, c2; | |
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50 |
| 30 | 51 do { |
| 52 c1 = _animone_internal_tolower(*str1++); | |
| 53 c2 = _animone_internal_tolower(*str2++); | |
| 54 } while (c1 == c2 && c1); | |
| 55 | |
| 56 return !!(c1 - c2); | |
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57 } |
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58 |
| 30 | 59 char *animone_internal_Stem(const char *filename) |
| 60 { | |
| 61 const char *ptr = strrchr(filename, '.'); | |
| 62 if (!ptr) | |
| 63 return NULL; | |
| 64 | |
| 65 size_t len = ptr - filename; | |
| 66 | |
| 67 char *stem = (char *)malloc(len + 1); | |
| 68 if (!stem) | |
| 69 return NULL; | |
| 70 | |
| 71 memcpy(stem, filename, len); | |
| 72 stem[len] = '\0'; | |
| 73 | |
| 74 return stem; | |
| 75 } | |
| 76 | |
| 77 int animone_internal_util_CheckPattern(const char *pattern, const char *str) | |
| 78 { | |
| 79 switch (*pattern) { | |
| 80 case '\0': return 0; | |
| 81 case '^': | |
| 82 // FIXME: Convert to C | |
| 83 if (std::regex_match(std::string(str), std::regex(pattern))) | |
| 84 return 1; | |
| 85 default: | |
| 86 break; | |
| 87 } | |
| 88 | |
| 89 return animone_internal_util_EqualStrings(pattern, str); | |
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90 } |
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91 |
| 30 | 92 /* Modifies `str` inplace */ |
| 93 int animone_internal_util_TrimLeft(char *str, const char* chars) | |
| 94 { | |
| 95 if (!str || !*str) | |
| 96 return 0; | |
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97 |
| 30 | 98 const size_t found = strcspn(str, chars); |
| 99 const size_t len = strlen(str); | |
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100 |
| 30 | 101 if (found == len) |
| 102 return 1; // nothing to do | |
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103 |
| 30 | 104 memmove(str, str + found, len - found); |
| 105 str[len - found] = '\0'; | |
| 106 | |
| 107 return 1; | |
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108 } |
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109 |
| 30 | 110 // reverse version of strcspn |
| 111 static inline size_t _animone_internal_strrcspn(const char *str1, const char *str2) | |
| 112 { | |
| 113 const size_t str1len = strlen(str1); | |
| 114 ptrdiff_t i; /* FIXME: this should be using size_t */ | |
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115 |
| 30 | 116 for (i = str1len - 1; i >= 0; i--) { |
| 117 size_t found = strcspn(str1 + i, str2); | |
| 118 if (found != str1len - i) | |
| 119 return i; | |
| 120 } | |
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121 |
| 30 | 122 return str1len; |
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123 } |
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124 |
| 30 | 125 int animone_internal_util_TrimRight(char *str, const char* chars) |
| 126 { | |
| 127 if (!str || !*str) | |
| 128 return 0; | |
| 129 | |
| 130 // We can get away without really moving memory around here. | |
| 131 // The old version simply used std::string::find_last_not_of, | |
| 132 // which I'm fairly sure isn't the intention of this function | |
| 133 // (for example find_last_not_of("gb ") returns "gb "). | |
| 134 const size_t found = _animone_internal_strrcspn(str, chars); | |
| 135 str[found] = '\0'; | |
| 136 | |
| 137 return 1; | |
| 138 } |