thodg/libgit2/src/util.c

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• Hash : 69a09b7c
  Author :
  Date : 2010-11-19T17:17:46
  

  Fix wrong pointer check in git__strdup Signed-off-by: Vicent Marti <tanoku@gmail.com>

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• src/util.c

• #define GIT__NO_HIDE_MALLOC
  #include "common.h"
  #include <stdarg.h>
  #include <stdio.h>
  
  void *git__malloc(size_t n)
  {
  	void *r = malloc(n);
  	if (!r)
  		return git_ptr_error(GIT_ENOMEM);
  	return r;
  }
  
  void *git__calloc(size_t a, size_t b)
  {
  	void *r = calloc(a, b);
  	if (!r)
  		return git_ptr_error(GIT_ENOMEM);
  	return r;
  }
  
  char *git__strdup(const char *s)
  {
  	char *r = strdup(s);
  	if (!r)
  		return git_ptr_error(GIT_ENOMEM);
  	return r;
  }
  
  int git__fmt(char *buf, size_t buf_sz, const char *fmt, ...)
  {
  	va_list va;
  	int r;
  
  	va_start(va, fmt);
  	r = vsnprintf(buf, buf_sz, fmt, va);
  	va_end(va);
  	if (r < 0 || ((size_t) r) >= buf_sz)
  		return GIT_ERROR;
  	return r;
  }
  
  int git__prefixcmp(const char *str, const char *prefix)
  {
  	for (;;) {
  		char p = *(prefix++), s;
  		if (!p)
  			return 0;
  		if ((s = *(str++)) != p)
  			return s - p;
  	}
  }
  
  int git__suffixcmp(const char *str, const char *suffix)
  {
  	size_t a = strlen(str);
  	size_t b = strlen(suffix);
  	if (a < b)
  		return -1;
  	return strcmp(str + (a - b), suffix);
  }
  
  int git__dirname(char *dir, size_t n, char *path)
  {
  	char *s;
  	size_t len;
  
  	assert(dir && n > 1);
  
  	if (!path || !*path || (s = strrchr(path, '/')) == NULL) {
  		strcpy(dir, ".");
  		return 1;
  	}
  
  	if (s == path) { /* "/[aaa]" */
  		strcpy(dir, "/");
  		return 1;
  	}
  
  	if ((len = s - path) >= n)
  		return GIT_ERROR;
  
  	memcpy(dir, path, len);
  	dir[len] = '\0';
  
  	return len;
  }
  
  int git__basename(char *base, size_t n, char *path)
  {
  	char *s;
  	size_t len;
  
  	assert(base && n > 1);
  
  	if (!path || !*path) {
  		strcpy(base, ".");
  		return 1;
  	}
  	len = strlen(path);
  
  	if ((s = strrchr(path, '/')) == NULL) {
  		if (len >= n)
  			return GIT_ERROR;
  		strcpy(base, path);
  		return len;
  	}
  
  	if (s == path && len == 1) { /* "/" */
  		strcpy(base, "/");
  		return 1;
  	}
  
  	len -= s - path;
  	if (len >= n)
  		return GIT_ERROR;
  
  	memcpy(base, s+1, len);
  	base[len] = '\0';
  
  	return len;
  }
  
  void git__hexdump(const char *buffer, size_t len)
  {
  	static const size_t LINE_WIDTH = 16;
  
  	size_t line_count, last_line, i, j;
  	const char *line;
  
  	line_count = (len / LINE_WIDTH);
  	last_line = (len % LINE_WIDTH);
  
  	for (i = 0; i < line_count; ++i) {
  		line = buffer + (i * LINE_WIDTH);
  		for (j = 0; j < LINE_WIDTH; ++j, ++line)
  			printf("%02X ", (unsigned char)*line & 0xFF);
  
  		printf("| ");
  
  		line = buffer + (i * LINE_WIDTH);
  		for (j = 0; j < LINE_WIDTH; ++j, ++line)
  			printf("%c", (*line >= 32 && *line <= 126) ? *line : '.');
  
  		printf("\n");
  	}
  
  	if (last_line > 0) {
  
  		line = buffer + (line_count * LINE_WIDTH);
  		for (j = 0; j < last_line; ++j, ++line)
  			printf("%02X ", (unsigned char)*line & 0xFF);
  
  		for (j = 0; j < (LINE_WIDTH - last_line); ++j)
  			printf("   ");
  
  		printf("| ");
  
  		line = buffer + (line_count * LINE_WIDTH);
  		for (j = 0; j < last_line; ++j, ++line)
  			printf("%c", (*line >= 32 && *line <= 126) ? *line : '.');
  
  		printf("\n");
  	}
  
  	printf("\n");
  }
  

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