FilesExpand file tree

master

/

common.c

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

191 lines (152 loc) · 3.87 KB

master

/

common.c

Copy path

Top

File metadata and controls

• Code
• Blame

191 lines (152 loc) · 3.87 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

/*

* Utilities library for libgit2 examples

*

* Written by the libgit2 contributors

*

* To the extent possible under law, the author(s) have dedicated all copyright

* and related and neighboring rights to this software to the public domain

* worldwide. This software is distributed without any warranty.

*

* You should have received a copy of the CC0 Public Domain Dedication along

* with this software. If not, see

* <http://creativecommons.org/publicdomain/zero/1.0/>.

*/

#include "common.h"

void check_lg2(int error, const char *message, const char *extra)

{

const git_error *lg2err;

const char *lg2msg = "", *lg2spacer = "";

if (!error)

return;

if ((lg2err = giterr_last()) != NULL && lg2err->message != NULL) {

lg2msg = lg2err->message;

lg2spacer = " - ";

}

if (extra)

fprintf(stderr, "%s '%s' [%d]%s%s\n",

message, extra, error, lg2spacer, lg2msg);

else

fprintf(stderr, "%s [%d]%s%s\n",

message, error, lg2spacer, lg2msg);

exit(1);

}

void fatal(const char *message, const char *extra)

{

if (extra)

fprintf(stderr, "%s %s\n", message, extra);

else

fprintf(stderr, "%s\n", message);

exit(1);

}

size_t is_prefixed(const char *str, const char *pfx)

{

size_t len = strlen(pfx);

return strncmp(str, pfx, len) ? 0 : len;

}

int match_str_arg(

const char **out, struct args_info *args, const char *opt)

{

const char *found = args->argv[args->pos];

size_t len = is_prefixed(found, opt);

if (!len)

return 0;

if (!found[len]) {

if (args->pos + 1 == args->argc)

fatal("expected value following argument", opt);

args->pos += 1;

*out = args->argv[args->pos];

return 1;

}

if (found[len] == '=') {

*out = found + len + 1;

return 1;

}

return 0;

}

static const char *match_numeric_arg(struct args_info *args, const char *opt)

{

const char *found = args->argv[args->pos];

size_t len = is_prefixed(found, opt);

if (!len)

return NULL;

if (!found[len]) {

if (args->pos + 1 == args->argc)

fatal("expected numeric value following argument", opt);

args->pos += 1;

found = args->argv[args->pos];

} else {

found = found + len;

if (*found == '=')

found++;

}

return found;

}

int match_uint16_arg(

uint16_t *out, struct args_info *args, const char *opt)

{

const char *found = match_numeric_arg(args, opt);

uint16_t val;

char *endptr = NULL;

if (!found)

return 0;

val = (uint16_t)strtoul(found, &endptr, 0);

if (!endptr || *endptr != '\0')

fatal("expected number after argument", opt);

if (out)

*out = val;

return 1;

}

static int match_int_internal(

int *out, const char *str, int allow_negative, const char *opt)

{

char *endptr = NULL;

int val = (int)strtol(str, &endptr, 10);

if (!endptr || *endptr != '\0')

fatal("expected number", opt);

else if (val < 0 && !allow_negative)

fatal("negative values are not allowed", opt);

if (out)

*out = val;

return 1;

}

int is_integer(int *out, const char *str, int allow_negative)

{

return match_int_internal(out, str, allow_negative, NULL);

}

int match_int_arg(

int *out, struct args_info *args, const char *opt, int allow_negative)

{

const char *found = match_numeric_arg(args, opt);

if (!found)

return 0;

return match_int_internal(out, found, allow_negative, opt);

}

int diff_output(

const git_diff_delta *d,

const git_diff_hunk *h,

const git_diff_line *l,

void *p)

{

FILE *fp = (FILE*)p;

(void)d; (void)h;

if (!fp)

fp = stdout;

if (l->origin == GIT_DIFF_LINE_CONTEXT ||

l->origin == GIT_DIFF_LINE_ADDITION ||

l->origin == GIT_DIFF_LINE_DELETION)

fputc(l->origin, fp);

fwrite(l->content, 1, l->content_len, fp);

return 0;

}

void treeish_to_tree(

git_tree **out, git_repository *repo, const char *treeish)

{

git_object *obj = NULL;

check_lg2(

git_revparse_single(&obj, repo, treeish),

"looking up object", treeish);

check_lg2(

git_object_peel((git_object **)out, obj, GIT_OBJ_TREE),

"resolving object to tree", treeish);

git_object_free(obj);

}